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Ansari FJ, Tafti HA, Amanzadeh A, Rabbani S, Shokrgozar MA, Heidari R, Behroozi J, Eyni H, Uversky VN, Ghanbari H. Comparison of the efficiency of ultrafiltration, precipitation, and ultracentrifugation methods for exosome isolation. Biochem Biophys Rep 2024; 38:101668. [PMID: 38405663 PMCID: PMC10885727 DOI: 10.1016/j.bbrep.2024.101668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 02/14/2024] [Accepted: 02/16/2024] [Indexed: 02/27/2024] Open
Abstract
Extracellular vesicles (EVs) are enclosed by a lipid-bilayer membrane and secreted by all types of cells. They are classified into three groups: apoptotic bodies, microvesicles, and exosomes. Exosomes play a number of important roles in the intercellular communication and crosstalk between tissues in the body. In this study, we use three common methods based on different principles for exosome isolation, namely ultrafiltration, precipitation, and ultracentrifugation. We use field emission scanning electron microscopy (FESEM) and dynamic light scattering (DLS) analyses for characterization of exosomes. The functionality and effect of isolated exosomes on the viability of hypoxic cells was investigated by alamarBlue and Flow-cytometry. The results of the FESEM study show that the ultrafiltration method isolates vesicles with higher variability of shapes and sizes when compared to the precipitation and ultracentrifugation methods. DLS results show that mean size of exosomes isolated by ultrafiltration, precipitation, and ultracentrifugation methods are 122, 89, and 60 nm respectively. AlamarBlue analysis show that isolated exosomes increase the viability of damaged cells by 11%, 15%, and 22%, respectively. Flow-cytometry analysis of damaged cells also show that these vesicles increase the content of live cells by 9%, 15%, and 20%, respectively. This study shows that exosomes isolated by the ultracentrifugation method are characterized by smaller size and narrow size distribution. Furthermore, more homogenous particles isolated by this method show increased efficiency of the protection of hypoxic cells in comparison with the exosomes isolated by the two other methods.
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Affiliation(s)
- Farshid Jaberi Ansari
- Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Ahmadi Tafti
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Disease Research Institute, Tehran Heart Center Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Amanzadeh
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
| | - Shahram Rabbani
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Disease Research Institute, Tehran Heart Center Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Reza Heidari
- Medical Biotechnology Research Center, AJA University of Medical Sciences, Tehran, 1411718541, Iran
| | - Javad Behroozi
- Research Center for Cancer Screening and Epidemiology, AJA University of Medical Sciences, Tehran, Iran
| | - Hossein Eyni
- Stem Cell and Regenerative Medicine Research Center, Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Vladimir N. Uversky
- Department of Molecular Medicine and USF Health Byrd Alzheimer’s Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA
| | - Hossein Ghanbari
- Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Disease Research Institute, Tehran Heart Center Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Institute for Biomaterials, University of Tehran & Tehran University of Medical Sciences, Tehran, Iran
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Zhang H, Liu Y, Gao L, Wang J. Analysis of flavor changes in Huangshan floral mushroom hydrolysates obtained by different enzyme treatments. Food Chem 2024; 443:138554. [PMID: 38306912 DOI: 10.1016/j.foodchem.2024.138554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/21/2024] [Accepted: 01/21/2024] [Indexed: 02/04/2024]
Abstract
This study aimed to investigate the flavor changes in Huangshan floral mushroom by different enzyme treatments. Seven enzyme groups were used to hydrolyze its protein to obtain protein hydrolysates (FPHs). Flavourzyme composite with dispase hydrolysates (FDHs) were selected for ultrafiltration to obtain peptides (FPs) with different molecular weights (Mw). Changes in flavor were investigated using HPLC, LC-MS, GC-MS, amino acid analysis and sensory evaluation. Color parameters and DPPH-scavenging activity were also determined. The results revealed that flavor characteristics of FPHs obtained from different enzyme treatments varied. FDHs presented the highest degree of hydrolysis (DH) (58.61 ± 1.55) %, rich 5'-nucleotides (8.61 ± 0.43 mg/mL), volatile compounds (28.54 ± 0.11 μg/g) and free amino acids (FAAs) (7.73 ± 0.51 mg/g). Further tests suggested that FPs with small Mw (<1K, 1-3 K) were optimal for the development of novel flavors, thus providing application value for rational utilization of Huangshan floral mushroom.
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Affiliation(s)
- Hui Zhang
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China; Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei University of Technology, Hefei 230009, China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Yong Liu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Li Gao
- Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei University of Technology, Hefei 230009, China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Junhui Wang
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China; Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei University of Technology, Hefei 230009, China; School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China.
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Lin D, Zhuang Z, Yu N, Wang Z, Song W, Du X. Comprehensive effects of microplastics on algae-laden surface water treatment by coagulation- ultrafiltration combined process: Algae cultivation, coagulation performance and membrane fouling development. Sci Total Environ 2024; 924:171553. [PMID: 38458443 DOI: 10.1016/j.scitotenv.2024.171553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/27/2024] [Accepted: 03/04/2024] [Indexed: 03/10/2024]
Abstract
In coastal areas, the surface water has been simultaneously exposed to the algae blooms caused by eutrophication and the microplastics (MPs) pollution originating from active human activities. As a practical alternative to address these issues in drinking water plant, coagulation-ultrafiltration combined process is still confronted with the limited understanding about the comprehensive effects of MPs on algae-laden surface water (ASW) treatment. Considering the migration of MPs in nature environment and drinking water treatment process, this study first aims to systematically investigate the influence of MPs on algae cultivation, coagulation performance and membrane fouling development. The results of algae cultivation indicate that MPs stimulated the algae activity by 58 % and then constantly suppressed the secretion of protein-like, humic-like and polysaccharide-like metabolites. The variation of particle size distribution and zeta potential confirm that MPs acted as nuclei to facilitate the development of large coagulation flocs with an increasing average size from 82.6 μm to 107.6 μm, during which the negatively charged pollutants were neutralized and removed from ASW. According to the SEM images, MPs could destroy the structure of fouling layer on 50 kDa membranes during the filtration of ASW coagulation effluent. Its synergistic effect with the enhanced coagulation performance and the suppressed EOM secretion contributed to the alleviation of membrane fouling caused by overlapped large-sized foulants. However, the interaction between the enriched organic foulants by MPs and the deposited coagulants on 300 kDa membranes facilitated the development of cake layer, leading to the deterioration of membrane permeability. This study emphasizes the importance in concerning the existence of MPs during the treatment of ASW by coagulation-ultrafiltration combined process and their exact influence in water purification efficiency.
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Affiliation(s)
- Dachao Lin
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Zhongjian Zhuang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Nan Yu
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Zhihong Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Wei Song
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Xing Du
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
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Cavalcante MS, Marins RV, Mounier S. Non-conservative behavior of organic matter and its interaction with metals in an equatorial estuary, Brazil. Environ Sci Pollut Res Int 2024:10.1007/s11356-024-33521-5. [PMID: 38698097 DOI: 10.1007/s11356-024-33521-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 04/27/2024] [Indexed: 05/05/2024]
Abstract
Droughts are becoming more intense and frequent in the Brazilian semiarid because of El Niño and global climate changes. The Jaguaribe River estuary is a semiarid ecosystem that experiences a reduction in freshwater discharges due to droughts and river damming. The decrease in freshwater fluxes has increased metal availability through the water residence time increase in the Jaguaribe River estuary. Then, this study aimed to evaluate the dissolved organic matter quality and its interaction with metals in the Jaguaribe River estuary after a severe drought period. It was performed through carbon analyses, fluorescence spectroscopy, ultrafiltration technique, and determinations of metals by ICP-MS. Optical analysis showed that the dissolved organic carbon (DOC) was preponderantly composed of terrestrial-derived humic compounds, while the low ratio between the particulate organic carbon (POC) and chlorophyll-a indicated that POC was predominantly phytoplankton-derived. DOC and POC presented non-conservative removal during the estuarine mixing. DOM and dissolved elements were mostly distributed within the LMW fraction and presented a low percentage in the colloidal fraction. Li, Rb, Sr, Mo, and U showed conservative behavior, while Cu, Fe, Cr, and V had non-conservative behavior with a significant positive correlation with DOM, suggesting DOM as a relevant driver of metal availability at the Jaguaribe River estuary even during the rainy season.
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Affiliation(s)
- Mariany Sousa Cavalcante
- Instituto de Ciências do Mar, Universidade Federal do Ceará, Avenida Abolição, Fortaleza, Ceará, 60165-081, Brazil.
| | - Rozane Valente Marins
- Instituto de Ciências do Mar, Universidade Federal do Ceará, Avenida Abolição, Fortaleza, Ceará, 60165-081, Brazil
| | - Stéphane Mounier
- Mediterranean Institute of Oceanography, Université de Toulon, Av. de L'Université, 83130, Toulon, France
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Trudel-Ferland M, Levasseur M, Goulet-Beaulieu V, Jubinville E, Hamon F, Jean J. Concentration of foodborne viruses eluted from fresh and frozen produce: Applicability of ultrafiltration. Int J Food Microbiol 2024; 416:110687. [PMID: 38554558 DOI: 10.1016/j.ijfoodmicro.2024.110687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/21/2024] [Accepted: 03/26/2024] [Indexed: 04/01/2024]
Abstract
Foodborne illnesses involving raw and minimally processed foods are often caused by human noroviruses (HuNoV) and hepatitis A virus (HAV). Since food is contaminated usually with small numbers of virions, these must be eluted from the food surface and then concentrated for detection. The objective of this study was to optimize an ultrafiltration (UF) concentration method for HAV and HuNoVs present on various fresh and frozen produce. The detection range of the optimized method and its applicability to different food matrices was compared to the reference method ISO 15216-1:2017. Strawberry, raspberry, blackberry, lettuce, and green onion (25 g) were contaminated with HAV, HuNoV GI.7 and HuNoV GII.4 and then recovered therefrom by elution. A commercial benchtop UF device was used for the concentration step. Viral RNA was extracted and detected by RT-qPCR. From fresh strawberries, recovery of HAV loaded at 104 genome copies per sample was 30 ± 13 %, elution time had no significant impact, and UF membrane with an 80-100 kDa cut-off in combination with Tris-glycine elution buffer at pH 9.5 was found optimal. At lower copy numbers on fresh strawberry, at least 1 log lower numbers of HuNoV were detectable by the UF method (103 vs 104 GII.4 copies/sample and 101 vs 103 GI.7 copies/sample), while HAV was detected at 101 genome copies/sample by both methods. Except on raspberry, the UF method was usually equivalent to the ISO method regardless of the virus tested. The UF method makes rapid viral concentration possible, while supporting the filtration of large volume of sample. With fewer steps and shorter analysis time than the ISO method, this method could be suitable for routine analysis of viruses throughout the food production and surveillance chain.
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Affiliation(s)
- Mathilde Trudel-Ferland
- Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec City, QC, Canada
| | - Marianne Levasseur
- Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec City, QC, Canada
| | - Valérie Goulet-Beaulieu
- Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec City, QC, Canada
| | - Eric Jubinville
- Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec City, QC, Canada
| | | | - Julie Jean
- Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec City, QC, Canada.
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Selamassakul O, Kaisangsri N, Sonklin C, Kaprasob R, Uthairatanakij A, Laohakunjit N. Effects of cluster dextrin encapsulation on the properties and antioxidant stability of fractionated Riceberry protein hydrolysate powder prepared by bromelain. Food Chem 2024; 439:138161. [PMID: 38070233 DOI: 10.1016/j.foodchem.2023.138161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 11/29/2023] [Accepted: 12/04/2023] [Indexed: 01/10/2024]
Abstract
In this work, the biological properties of fractionated Riceberry bran protein hydrolysate obtained by ultrafiltration (URBPH) were evaluated and the possibility of using cluster dextrin to produce hydrolysate powder by spray-drying was investigated. Fractionation into peptides < 3 kDa was observed to improve antioxidant activity. URBPH < 3 kDa was then freeze-dried (FD-URBPH) and spray-dried (SD-URBPH) at different inlet air temperatures of 100-160 °C. The water solubility and antioxidant activity of FD-URBPH were higher than those of SD-URBPH. Nevertheless, encapsulation of hydrolysate with 10% cluster dextrin and an inlet temperature of 120 °C was also successful in maintaining protein qualities, which showed high 2,2'-azino-bis 3-ethylbenzthiazoline-6-sulfonic (ABTS•+) scavenging activity (89.14%) and water solubility index (92.49%) and low water activity (aw = 0.53). Moreover, encapsulation preserved the antioxidant activity of peptides during gastrointestinal digestion better than the free form. URBPH and its spray-dried microcapsules could be used as bioactive ingredients in functional drinks or foods.
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Affiliation(s)
- Orrapun Selamassakul
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, 49 Tientalay Rd., Thakam, Bangkhuntien, Bangkok 10150, Thailand; Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi, 49 Tientalay Rd., Thakam, Bangkhuntien, Bangkok 10150, Thailand
| | - Nattapon Kaisangsri
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, 49 Tientalay Rd., Thakam, Bangkhuntien, Bangkok 10150, Thailand; Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi, 49 Tientalay Rd., Thakam, Bangkhuntien, Bangkok 10150, Thailand
| | - Chanikan Sonklin
- Department of Industrial Chemistry, King Mongkut's University of Technology North Bangkok, 1518 Pibulsongkram Road, Bangsue, Bangkok 10800, Thailand
| | - Ratchadaporn Kaprasob
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, 49 Tientalay Rd., Thakam, Bangkhuntien, Bangkok 10150, Thailand; Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi, 49 Tientalay Rd., Thakam, Bangkhuntien, Bangkok 10150, Thailand
| | - Apiradee Uthairatanakij
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, 49 Tientalay Rd., Thakam, Bangkhuntien, Bangkok 10150, Thailand
| | - Natta Laohakunjit
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, 49 Tientalay Rd., Thakam, Bangkhuntien, Bangkok 10150, Thailand.
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Wang T, Whitcher-Johnstone A, Scaringella YS, Keith-Luzzi M, Shao J, Taub ME, Chan TS. Comparison of Commonly Used and New Methods to Determine Small Molecule Non-Specific Binding to Human Liver Microsomes. J Pharm Sci 2024:S0022-3549(24)00135-7. [PMID: 38615815 DOI: 10.1016/j.xphs.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 04/06/2024] [Accepted: 04/07/2024] [Indexed: 04/16/2024]
Abstract
Accurate measurement of non-specific binding of a drug candidate to human liver microsomes (HLM) can be critical for the accurate determination of key enzyme kinetic parameters such as Michaelis-Menton (Km), reversible inhibition (Ki), or inactivation (KI) constants. Several methods have been developed to determine non-specific binding of small molecules to HLM, such as rapid equilibrium dialysis (RED), ultrafiltration (UF), HLM bound to magnetizable beads (HLM-beads), ultracentrifugation (UC), the linear extrapolation stability assay (LESA), and the Transil™ system. Despite various differences in methodology between these methods, it is generally presumed that similar free fraction values (fu,mic) should be generated. To evaluate this hypothesis, a test set of 9 compounds were selected, representing low (high fu,mic value) and significant (low fu,mic value) HLM binding, respectively, across HLM concentrations tested in this manuscript. The fu,mic values were determined using a single compound concentration (1.0 µM) and three HLM concentrations (0.025, 0.50, and 1.0 mg/mL). When the HLM non-specific binding event is not extensive resulting in high fu,mic values, all methods generated similar fu,mic values. However, fu,mic values varied markedly across assay formats when high binding to HLM occurred, where fu,mic values differed by up to 33-fold depending on the method used. Potential causes for such discrepancies across the various methods employed, practical implications related to conduct the different assays, and implications to clinical drug-drug interaction (DDI) predictions are discussed.
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Affiliation(s)
- Ting Wang
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT 06877, USA.
| | | | - Young Sun Scaringella
- Department of Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT 06877, USA
| | - Monica Keith-Luzzi
- Department of Nonclinical Drug Safety, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT 06877, USA
| | - Juntang Shao
- Anhui Medical University, 1980 Meishan Road, Anhui, China
| | - Mitchell E Taub
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT 06877, USA
| | - Tom S Chan
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT 06877, USA
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Pignon F, Guilbert E, Mandin S, Hengl N, Karrouch M, Jean B, Putaux JL, Gibaud T, Manneville S, Narayanan T. Orthotropic organization of a cellulose nanocrystal suspension realized via the combined action of frontal ultrafiltration and ultrasound as revealed by in situ SAXS. J Colloid Interface Sci 2024; 659:914-925. [PMID: 38219310 DOI: 10.1016/j.jcis.2023.12.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/21/2023] [Accepted: 12/28/2023] [Indexed: 01/16/2024]
Abstract
HYPOTHESIS Rodlike cellulose nanocrystals (CNCs) exhibit significant potential as building blocks for creating uniform, sustainable materials. However, a critical hurdle lies in the need to enhance existing or devise novel processing that provides improved control over the alignment and arrangement of CNCs across a wide spatial range. Specifically, the challenge is to achieve orthotropic organization in a single-step processing, which entails creating non-uniform CNC orientations to generate spatial variations in anisotropy. EXPERIMENTS A novel processing method combining frontal ultrafiltration (FU) and ultrasound (US) has been developed. A dedicated channel-cell was designed to simultaneously generate (1) a vertical acoustic force thanks to a vibrating blade at the top and (2) a transmembrane pressure force at the bottom. Time-resolved in situ small-angle X-ray scattering permitted to probe the dynamical structural organization/orientation of CNCs during the processing. FINDINGS For the first time, a typical three-layer orthotropic structure that resembles the articular cartilage organization was achieved in one step during the FU/US process: a first layer composed of CNCs having their director aligned parallel to the horizontal membrane surface, a second intermediate isotropic layer, and a third layer of CNCs with their director vertically oriented along the direction of US wave propagation direction.
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Affiliation(s)
- Frédéric Pignon
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LRP, F-38000 Grenoble, France.
| | - Emilie Guilbert
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LRP, F-38000 Grenoble, France
| | - Samuel Mandin
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LRP, F-38000 Grenoble, France
| | - Nicolas Hengl
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LRP, F-38000 Grenoble, France
| | - Mohamed Karrouch
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LRP, F-38000 Grenoble, France
| | - Bruno Jean
- Univ. Grenoble Alpes, CNRS, CERMAV, F-38000 Grenoble, France
| | - Jean-Luc Putaux
- Univ. Grenoble Alpes, CNRS, CERMAV, F-38000 Grenoble, France
| | - Thomas Gibaud
- ENSL, CNRS, Laboratoire de Physique, F-69342 Lyon, France
| | - Sebastien Manneville
- ENSL, CNRS, Laboratoire de Physique, F-69342 Lyon, France; Institut Universitaire de France, France
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Nastouli A, Sweeney J, Harasek M, Karabelas AJ, Patsios SI. Development of a hybrid bio-purification process of lactic acid solutions employing an engineered E. coli strain in a membrane bioreactor. Biotechnol Biofuels Bioprod 2024; 17:48. [PMID: 38555439 PMCID: PMC10981347 DOI: 10.1186/s13068-024-02497-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 03/22/2024] [Indexed: 04/02/2024]
Abstract
BACKGROUND A potential alternative to lactic acid production through sugar fermentation is its recovery from grass silage leachate. The separation and purification of lactic acid from fermentation broths remain a key issue, as it amounts to up to 80% of its industrial production cost. In this study, a genetically engineered E. coli strain (A1:ldhA), that cannot catabolize lactic acid, has been used to selectively remove impurities from a synthetic medium comprising typical components (i.e., glucose and acetic acid) of green grass silage leachate. A systematic approach has been followed to provide a proof-of-concept for a bio-purification process of lactic acid solutions in a membrane bioreactor operating in semi-continuous mode. RESULTS The synthetic medium composition was initially optimized in shake-flasks experiments, followed by scale-up in bench-scale bioreactor. Complete (i.e., 100%) and 60.4% removal for glucose and acetic acid, respectively, has been achieved in batch bioreactor experiments with a synthetic medium comprising 0.5 g/L glucose and 0.5 g/L acetic acid as carbon sources, and 10 g/L lactic acid; no lactic acid catabolism was observed in all batch fermentation tests. Afterwards, a hybrid biotechnological process combining semi-continuous bioreactor fermentation and ultrafiltration membrane separation (membrane bioreactor) was applied to in-situ separate purified medium from the active cells. The process was assessed under different semi-continuous operating conditions, resulting in a bacteria-free effluent and 100% glucose and acetic acid depletion, with no lactic acid catabolism, thus increasing the purity of the synthetic lactic acid solution. CONCLUSIONS The study clearly demonstrated that a bio-purification process for lactic acid employing the engineered E. coli strain cultivated in a membrane bioreactor is a technically feasible concept, paving the way for further technological advancement.
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Affiliation(s)
- Alexandra Nastouli
- Laboratory of Natural Resources and Renewable Energies, Chemical Process and Energy Resources Institute (CPERI), Centre for Research and Technology-Hellas (CERTH), Thermi, Thessaloniki, Greece
- Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria
| | - Joseph Sweeney
- School of Biosystems and Food Engineering, University College Dublin (UCD), Belfield, Dublin, Ireland
| | - Michael Harasek
- Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Vienna, Austria
| | - Anastasios J Karabelas
- Laboratory of Natural Resources and Renewable Energies, Chemical Process and Energy Resources Institute (CPERI), Centre for Research and Technology-Hellas (CERTH), Thermi, Thessaloniki, Greece
| | - Sotiris I Patsios
- Laboratory of Natural Resources and Renewable Energies, Chemical Process and Energy Resources Institute (CPERI), Centre for Research and Technology-Hellas (CERTH), Thermi, Thessaloniki, Greece.
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Wu X, Li Y, Su Z, Tian L, Siddique MS, Yu W. Less pressure contributes to gravity-driven membrane ultrafiltration with greater performance: Enhanced driving efficiency and reduced disinfection by-products formation potential. J Environ Sci (China) 2024; 137:407-419. [PMID: 37980026 DOI: 10.1016/j.jes.2023.02.049] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/25/2023] [Accepted: 02/26/2023] [Indexed: 11/20/2023]
Abstract
Gravity-driven membrane (GDM) systems have been well developed previously; however, impacts of driving (i.e., transmembrane) pressure on their performance received little attention, which may influence GDM performance. In this study, we evaluated 4 GDM systems via altering the transmembrane pressure from 50 mbar to 150 mbar with 2 groups, treating surface water in Beijing, China. Results showed that less driving pressure was more favorable. Specifically, compared to groups (150 mbar), groups under a pressure of 50 mbar were found to have greater normalized permeability and lower total resistance. During the whole operation period, the quality of effluents was gradually improved. For example, the removal efficiency of UV254 was significantly improved; particularly, under low driving pressure, the removal efficiency of UV254 in PES GDM system increased by 11.91%, as compared to the corresponding system under high driving pressure. This observation was consistent with the reduction on disinfection by-products (DBPs) formation potential; groups under 50 mbar achieved better DBPs potential control, indicating the advantages of lower driving pressure. Biofilms were analyzed and responsible for these differences, and distinct distributions of bacteria communities of two GDM systems under 50 and 150 mbar may be responsible for various humic-like substances removal efficiency. Overall, GDM systems under less pressure should be considered and expected to provide suggestions on the design of GDM systems in real applications.
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Affiliation(s)
- Xiaoting Wu
- Colleges of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Yufei Li
- Colleges of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Zhaoyang Su
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Long Tian
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Muhammad Saboor Siddique
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Wenzheng Yu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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11
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Taligrot H, Wurtzer S, Monnot M, Moulin L, Moulin P. Implementation of a Sensitive Method to Assess High Virus Retention Performance of Low-Pressure Reverse Osmosis Process. Food Environ Virol 2024; 16:97-108. [PMID: 38085424 DOI: 10.1007/s12560-023-09570-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 11/07/2023] [Indexed: 03/26/2024]
Abstract
Human enteric viruses are important etiological agents of waterborne diseases. Environmental waters are usually contaminated with low virus concentration requiring large concentration factors for effective detection by (RT)-qPCR. Low-pressure reverse osmosis is often used to remove water contaminants, but very few studies focused on the effective virus removal of reverse osmosis treatment with feed concentrations as close as possible to environmental concentrations and principally relied on theoretical virus removal. The very low viral concentrations usually reported in the permeates (i.e. at least 5 log of removal rate) mean that very large volumes of water need to be analysed to have sufficient sensitivity and assess the process efficiency. This study evaluates two methods for the concentration of adenoviruses, enteroviruses and MS2 bacteriophages at different viral concentrations in large (< 200 L) and very large (> 200 L) volumes. The first method is composed of two ultrafiltration membranes with low-molecular weight cut-offs while the second method primarily relies on adsorption and elution phases using electropositive-charged filters. The recovery rates were assessed for both methods. For the ultrafiltration-based protocol, recovery rates were similar for each virus studied: 80% on average at high virus concentrations (106-107 viruses L-1) and 50% at low virus concentrations (103-104 viruses L-1). For the electropositive-charged filter-based method, the average recoveries obtained were about 36% for ADV 41, 57% for CV-B5 and 1.6% for MS2. The ultrafiltration-based method was then used to evaluate the performance of a low-pressure reverse osmosis lab-scale pilot plant. The retentions by reverse osmosis were similar for all studied viruses and the validated recovery rates applied to the system confirmed the reliability of the concentration method. This method was effective in concentrating all three viruses over a wide range of viral concentrations. Moreover, the second concentration method using electropositive-charged filters was studied, allowing the filtration of larger volumes of permeate from a semi-industrial low-pressure reverse osmosis pilot plant. This reference method was used because of the inability of the UF method to filter volumes on the order of one cubic metre.
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Affiliation(s)
- Hugo Taligrot
- CNRS, Centrale Marseille, M2P2, Équipe Procédés Membranaires (EPM), Aix Marseille University, Marseille, France
- Eau de Paris, Direction de la Recherche du Développement et de la Qualité de l'Eau, 33 Avenue Jean Jaurès, 94200, Ivry-Sur-Seine, France
| | - Sébastien Wurtzer
- Eau de Paris, Direction de la Recherche du Développement et de la Qualité de l'Eau, 33 Avenue Jean Jaurès, 94200, Ivry-Sur-Seine, France
| | - Mathias Monnot
- CNRS, Centrale Marseille, M2P2, Équipe Procédés Membranaires (EPM), Aix Marseille University, Marseille, France
| | - Laurent Moulin
- Eau de Paris, Direction de la Recherche du Développement et de la Qualité de l'Eau, 33 Avenue Jean Jaurès, 94200, Ivry-Sur-Seine, France
| | - Philippe Moulin
- CNRS, Centrale Marseille, M2P2, Équipe Procédés Membranaires (EPM), Aix Marseille University, Marseille, France.
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12
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Monnot M, Ollivier J, Taligrot H, Garry P, Cordier C, Stravakakis C, Le Guyader FS, Moulin P. Retention of Virus Versus Surrogate, by Ultrafiltration in Seawater: Case Study of Norovirus Versus Tulane. Food Environ Virol 2024; 16:14-24. [PMID: 38184502 DOI: 10.1007/s12560-023-09574-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/28/2023] [Indexed: 01/08/2024]
Abstract
In the field of chemical engineering and water treatment, the study of viruses, included surrogates, is well documented. Often, surrogates are used to study viruses and their behavior because they can be produced in larger quantities in safer conditions and are easier to handle. In fact, surrogates allow studying microorganisms which are non-infectious to humans but share some properties similar to pathogenic viruses: structure, composition, morphology, and size. Human noroviruses, recognized as the leading cause of epidemics and sporadic cases of gastroenteritis across all age groups, may be mimicked by the Tulane virus. The objectives of this work were to study (i) the ultrafiltration of Tulane virus and norovirus to validate that Tulane virus can be used as a surrogate for norovirus in water treatment process and (ii) the retention of norovirus and the surrogate as a function of water quality to better understand the use of the latter pathogenic viruses. Ultrafiltration tests showed significant logarithmic reduction values (LRV) in viral RNA: around 2.5 for global LRV (i.e., based on the initial and permeate average concentrations) and between 2 and 6 for average LRV (i.e., retention rate considering the increase of viral concentration in the retentate), both for norovirus and the surrogate Tulane virus. Higher reduction rates (from 2 to 6 log genome copies) are obtained for higher initial concentrations (from 101 to 107 genome copies per mL) due to virus aggregation in membrane lumen. Tulane virus appears to be a good surrogate for norovirus retention by membrane processes.
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Affiliation(s)
- M Monnot
- Aix Marseille Univ., CNRS, Centrale Marseille, M2P2 UMR 7340, Equipe Procédés Membranaires (EPM), Europôle de l'Arbois, Pavillon Laennec, Hall C, BP80, 13545, Aix-en-Provence, France
| | - J Ollivier
- Ifremer - U. Microbiologie, Aliment, Santé et Environnement (LSEM/RBE), Rue de l'Ile d'Yeu, BP 21105, 44311, Nantes, Cedex 3, France
| | - H Taligrot
- Aix Marseille Univ., CNRS, Centrale Marseille, M2P2 UMR 7340, Equipe Procédés Membranaires (EPM), Europôle de l'Arbois, Pavillon Laennec, Hall C, BP80, 13545, Aix-en-Provence, France
| | - P Garry
- Ifremer - U. Microbiologie, Aliment, Santé et Environnement (LSEM/RBE), Rue de l'Ile d'Yeu, BP 21105, 44311, Nantes, Cedex 3, France
| | - C Cordier
- Aix Marseille Univ., CNRS, Centrale Marseille, M2P2 UMR 7340, Equipe Procédés Membranaires (EPM), Europôle de l'Arbois, Pavillon Laennec, Hall C, BP80, 13545, Aix-en-Provence, France
| | - C Stravakakis
- Ifremer - EMMA Plateforme Expérimentale Mollusques Marins Atlantique, 85230, Bouin, France
| | - F S Le Guyader
- Ifremer - U. Microbiologie, Aliment, Santé et Environnement (LSEM/RBE), Rue de l'Ile d'Yeu, BP 21105, 44311, Nantes, Cedex 3, France
| | - P Moulin
- Aix Marseille Univ., CNRS, Centrale Marseille, M2P2 UMR 7340, Equipe Procédés Membranaires (EPM), Europôle de l'Arbois, Pavillon Laennec, Hall C, BP80, 13545, Aix-en-Provence, France.
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13
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Doi Y, Shinzawa M, Arisato T, Oka H, Matsumoto A, Kitamura H, Nakazono Y, Nishiya Y, Ueda Y, Kamimura T, Hayashi T, Yoshihara F, Isaka Y. Effects of sodium-glucose co-transporter 2 inhibitors on ultrafiltration in patients with peritoneal dialysis: a protocol for a randomized, double-blind, placebo-controlled, crossover trial (EMPOWERED). Clin Exp Nephrol 2024:10.1007/s10157-024-02467-w. [PMID: 38402502 DOI: 10.1007/s10157-024-02467-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/17/2024] [Indexed: 02/26/2024]
Abstract
BACKGROUND Volume overload is common and associated with high mortality in patients on peritoneal dialysis (PD). Traditional strategies including diuretics, water/salt restriction, and icodextrin-based solutions cannot always fully correct this condition, necessitating novel alternative strategies. Recent studies confirmed the expression of sodium-glucose cotransporter 2 (SGLT2) in the human peritoneum. Experimental data suggest that SGLT2 inhibitors decrease glucose absorption from the PD solution, thereby increasing the ultrafiltration volume. This trial aims to assess whether SGLT2 inhibitors increase the ultrafiltration volume in patients on PD. METHODS The EMPOWERED trial (trial registration: jRCTs051230081) is a multicenter, randomized, double-blind, placebo-controlled, crossover trial. Patients with clinically diagnosed chronic heart failure are eligible regardless of the presence of diabetes if they use at least 3 L/day glucose-based PD solutions. Participants will be randomly assigned (1:1) to receive empagliflozin 10 mg once daily and then placebo or vice versa. Each treatment period will last 8 weeks with a 4-week washout period. This study will recruit at least 36 randomized participants. The primary endpoint is the change in the daily ultrafiltration volume from baseline to week 8 in each intervention period. The key secondary endpoints include changes in the biomarkers of drained PD solutions, renal residual function, and anemia-related parameters. CONCLUSIONS This trial aims to assess the benefit of SGLT2 inhibitors in fluid management with a novel mechanism of action in patients on PD. It will also provide insights into the effects of SGLT2 inhibitors on solute transport across the peritoneal membrane and residual renal function.
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Affiliation(s)
- Yohei Doi
- Department of Nephrology, Osaka University Graduate School of Medicine, 2-2-D11, Yamada-oka, Suita, Osaka, 565-0871, Japan.
- Department of Cardiology, Pulmonology, Hypertension and Nephrology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan.
| | - Maki Shinzawa
- Department of Nephrology, Osaka University Graduate School of Medicine, 2-2-D11, Yamada-oka, Suita, Osaka, 565-0871, Japan
- Health and Counseling Center, Osaka University, Toyonaka, Osaka, Japan
| | - Tetsuya Arisato
- Division of Nephrology and Hypertension, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Hideaki Oka
- Division of Kidney Center, Matsuyama Red Cross Hospital, Matsuyama, Ehime, Japan
| | - Ayumi Matsumoto
- Department of Nephrology, Osaka University Graduate School of Medicine, 2-2-D11, Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Harumi Kitamura
- Department of Clinical Quality Management, Osaka University Hospital, Suita, Osaka, Japan
| | - Yumi Nakazono
- Medicine Division, Nippon Boehringer Ingelheim Co., Ltd., Shinagawa-ku, Tokyo, Japan
| | - Yoichi Nishiya
- Medicine Division, Nippon Boehringer Ingelheim Co., Ltd., Shinagawa-ku, Tokyo, Japan
| | - Yoshiyasu Ueda
- Department of Kidney Disease and Hypertension, Osaka General Medical Center, Osaka, Osaka, Japan
| | - Taro Kamimura
- Division of Kidney Center, Matsuyama Red Cross Hospital, Matsuyama, Ehime, Japan
| | - Terumasa Hayashi
- Department of Kidney Disease and Hypertension, Osaka General Medical Center, Osaka, Osaka, Japan
| | - Fumiki Yoshihara
- Division of Nephrology and Hypertension, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Yoshitaka Isaka
- Department of Nephrology, Osaka University Graduate School of Medicine, 2-2-D11, Yamada-oka, Suita, Osaka, 565-0871, Japan
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Parsin S, Kaltschmitt M. Processing of hemicellulose in wheat straw by steaming and ultrafiltration - A novel approach. Bioresour Technol 2024; 393:130071. [PMID: 38000637 DOI: 10.1016/j.biortech.2023.130071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/13/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
Water-soluble xylans useable for many potential applications can be produced based on the hydrolysis of wheat straw within a fixed bed using saturated steam to provide a xylan-rich hydrolysate low in particles and lignin enabling an effective ultrafiltration and xylan separation. Under defined conditions (180 °C, 10 bar, 35 min), a degree of solubilization of 29.6 % for straw and of 63 % for hemicellulose is achieved. The dry mass of the resulting hydrolysate consists of at least 58 % xylose and arabinose. The xylose is mainly (87 %) present in non-monomeric form and appears to have a broad molecular weight distribution. Ultrafiltration with commercial membranes (4 to 50 kDa) is being investigated for the separation of the target fraction; here significant differences in the filtration behavior and rejections from 9 to 81 % for carbohydrates and from 13 to 48 % for phenolic compounds (lignin), respectively, are found.
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Affiliation(s)
- Stanislav Parsin
- Hamburg University of Technology (TUHH), Institute of Environmental Technology and Energy Economics (IUE), Eissendorfer Strasse 40, 21073 Hamburg, Germany.
| | - Martin Kaltschmitt
- Hamburg University of Technology (TUHH), Institute of Environmental Technology and Energy Economics (IUE), Eissendorfer Strasse 40, 21073 Hamburg, Germany
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15
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Starr MC, Voivodas M, Hains DS. Using aquapheresis with continuous hematocrit monitoring to guide ultrafiltration. Pediatr Nephrol 2024; 39:597-601. [PMID: 37661234 DOI: 10.1007/s00467-023-06143-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/15/2023] [Accepted: 08/15/2023] [Indexed: 09/05/2023]
Abstract
BACKGROUND Management of edema and volume overload in patients with hypoalbuminemia, either due to nephrotic syndrome or other disease processes, can be extremely challenging. METHODS We describe the management of five patients with hypoalbuminemia and severe fluid overload using the Aquadex FlexFlow device with continuous hematocrit monitoring to guide ultrafiltration. RESULTS We report five pediatric patients ranging in age from 7 days to 11 years and in size from 2.7 to 65 kg with hypoalbuminemia due to a variety of etiologies treated with slow continuous ultrafiltration with continuous hematocrit monitoring to guide ultrafiltration using the Aquadex device. Treatment allowed successful fluid removal in all cases, without hypotension or other hemodynamic complications. CONCLUSIONS In a variety of clinical circumstances and in patients from infants to adolescence, we report that patients with diuretic-resistant fluid overload can be treated with Aquadex using continuous hematocrit monitoring to guide management to allow fluid removal without hemodynamic instability or other complications. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Michelle C Starr
- Division of Pediatric Nephrology, Department of Pediatrics, Indiana University School of Medicine, 410 W 10Th Street, Suite 2000A, Indianapolis, IN, 46202, USA.
- Pediatric and Adolescent Comparative Effectiveness Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA.
| | - Michelle Voivodas
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - David S Hains
- Division of Pediatric Nephrology, Department of Pediatrics, Indiana University School of Medicine, 410 W 10Th Street, Suite 2000A, Indianapolis, IN, 46202, USA
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16
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Cao L, Zhao J, Wang M, Khan IA, Li XC. Rapid preparation and proton NMR fingerprinting of polysaccharides from Radix Astragali. Carbohydr Res 2024; 536:109053. [PMID: 38310807 DOI: 10.1016/j.carres.2024.109053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 01/23/2024] [Accepted: 01/30/2024] [Indexed: 02/06/2024]
Abstract
The purity, content, and structure of the polysaccharides prepared from a specific medicinal plant are the fundamental basis to interpret the observed biological activities. An ultrafiltration-based method has been developed for rapid preparation of total and fractional polysaccharides from Radix Astragali in high yield and purity. This method involves extraction of plant material by hot water, treatment with Sevag reagent, and ultrafiltration using molecular weight cutoff concentrators. The prepared polysaccharides were assessed by 1H NMR spectroscopy, providing general purity, fingerprinting, and structural information. This method may be used to efficiently screen polysaccharides in plants.
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Affiliation(s)
- Liang Cao
- National Center for Natural Products Research, School of Pharmacy, The University of Miscsissippi, University, Mississippi, 38677, USA; Hunan Provincial Key Laboratory of Dong Medicine, Hunan University of Medicine, Huaihua, 418000, PR China
| | - Jianping Zhao
- National Center for Natural Products Research, School of Pharmacy, The University of Miscsissippi, University, Mississippi, 38677, USA
| | - Mei Wang
- National Center for Natural Products Research, School of Pharmacy, The University of Miscsissippi, University, Mississippi, 38677, USA; Natural Products Utilization Research Unit, Agricultural Research Service, United States Department of Agriculture, University, Mississippi, 38677, USA
| | - Ikhlas A Khan
- National Center for Natural Products Research, School of Pharmacy, The University of Miscsissippi, University, Mississippi, 38677, USA; Department of BioMolecular Sciences, School of Pharmacy, The University of Mississippi, University, Mississippi, 38677, USA
| | - Xing-Cong Li
- National Center for Natural Products Research, School of Pharmacy, The University of Miscsissippi, University, Mississippi, 38677, USA; Department of BioMolecular Sciences, School of Pharmacy, The University of Mississippi, University, Mississippi, 38677, USA.
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Zeng W, Zhang H, Zhao J, Wang J, Bai L, Li G, Liang H. Synergistic roles of oxidation and self-aggregation in efficient ultrafiltration membrane fouling alleviation using a flow-through Sb-SnO 2 anode during wastewater reclamation. Water Res 2024; 249:121003. [PMID: 38086205 DOI: 10.1016/j.watres.2023.121003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 12/05/2023] [Accepted: 12/08/2023] [Indexed: 01/03/2024]
Abstract
The application of ultrafiltration (UF) in wastewater reclamation alleviates the demand for limited water supplies. However, the membrane fouling caused by the effluent organic matter (EfOM) becomes a major obstacle for UF application. In this study, a pre-oxidation strategy for UF using a Sb-SnO2 (ATO) anode in flow-through mode was proposed with the hopes to improve the performance of UF during wastewater reclamation. The results indicated that this flow-through ATO (FA) anode significantly outperformed a boron-doped diamond (BDD) anode in terms of EfOM degradation and membrane fouling control. It is noteworthy that apart from oxidation, the self-aggregation behavior of foulants was also involved in the mechanisms of membrane fouling mitigation. On the one hand, FA pre-oxidation relieved the burden of membrane fouling by decomposing the macromolecular EfOM into small molecular organic matter, and even mineralizing it. The effective destruction of unsaturated EfOM by FA pre-oxidation made a remarkable contribution to fouling mitigation due to the strong correlation between the total fouling index and UV254. On the other hand, the surface morphology of membrane and interface properties of foulants revealed the self-aggregation behavior of foulants. FA pre-oxidation made the foulants aggregate spontaneously and reduced the potential of forming a dense cake layer on the membrane surface, which was conductive for water permeation. Overall, FA pre-oxidation proved to be a feasible and chemical-free option for UF pretreatment to simultaneously produce high-quality reused water and alleviate membrane fouling during wastewater reclamation.
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Affiliation(s)
- Weichen Zeng
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Han Zhang
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jing Zhao
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jinlong Wang
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Langming Bai
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Guibai Li
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Heng Liang
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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18
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Del Amo-Mateos E, Cáceres B, Coca M, Teresa García-Cubero M, Lucas S. Recovering rhamnogalacturonan-I pectin from sugar beet pulp using a sequential ultrasound and microwave-assisted extraction: Study on extraction optimization and membrane purification. Bioresour Technol 2024; 394:130263. [PMID: 38159817 DOI: 10.1016/j.biortech.2023.130263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 12/18/2023] [Accepted: 12/25/2023] [Indexed: 01/03/2024]
Abstract
This research focuses on the integrated recovery of rhamnogalacturonan-I (RG-I) pectin from sugar beet pulp (SBP). First, the extraction of RG-I pectin through sequential ultrasound-assisted extraction (UAE) and microwave-assisted extraction (MAE) was assessed. Optimization using a response surface methodology identified the optimal conditions as initial pH 4, 10 min of UAE, and 157 °C for MAE, achieving a 66.0 % recovery of pectooligosaccharides (POS). Additionally, purification through continuous diafiltration and concentration via ultrafiltration of the POS using membranes with different molecular weight cut-offs (MWCO) was explored. In contrast to previous research using discontinuous diafiltration, the use of continuous diafiltration allowed a decrease in the extract viscosity and obtained higher yields using a higher MWCO membrane. The refined RG-I pectin solids exhibited a high global yield (39-40 g pectin/100 g SBP), and high-methoxyl characteristics, as well as purity levels (70-80 %) similar to commercial prebiotics.
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Affiliation(s)
- Esther Del Amo-Mateos
- Institute of Sustainable Processes, University of Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, Valladolid, Spain.
| | - Berta Cáceres
- Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, Valladolid, Spain.
| | - Mónica Coca
- Institute of Sustainable Processes, University of Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, Valladolid, Spain.
| | - M Teresa García-Cubero
- Institute of Sustainable Processes, University of Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, Valladolid, Spain.
| | - Susana Lucas
- Institute of Sustainable Processes, University of Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, Valladolid, Spain.
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Zhai Y, Peng W, Luo W, Wu J, Liu Y, Wang F, Li X, Yu J, Wang S. Component stabilizing mechanism of membrane-separated hydrolysates on frozen surimi. Food Chem 2024; 431:137114. [PMID: 37595381 DOI: 10.1016/j.foodchem.2023.137114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 08/01/2023] [Accepted: 08/05/2023] [Indexed: 08/20/2023]
Abstract
This study investigated the cryoprotective mechanism of ultrafiltration membrane-separated fractions (>10 kDa, UF-1; 3-10 kDa, UF-2; and <3 kDa, UF-3) derived from silver carp hydrolysates on frozen surimi. The surimi gel incorporating UF-3 exhibited a compact, continuous structure with uniform pores, even after undergoing six freeze-thaw (F-T) cycle, with the minimal reduction in entrapped water (from 95.1 % to 91.1 %) and least increase in free water (from 4.5 % to 6.6 %) as revealed by SEM and LF-NMR analysis. Through molecular docking analysis, three major peptides in UF-3 were identified to form robust interactions with the myosin head pocket, facilitated by hydrogen bonds, electrostatic forces, and hydrophobic interactions. Furthermore, molecular dynamics simulations demonstrated that the three peptides effectively prevented myosin from unfolding and aggregating by tightly binding to basic amino acids (Arg, Lys) and hydrophobic amino acids (Phe, Leu, Ile, Met, and Val) residues in the myosin head pocket, primarily governed by electrostatic energies (-156.95, -321.38, and -267.53 kcal/mol, respectively) and van der Waals energies (-395.05, -347.46, and -319.16 kcal/mol, respectively). Notably, the key action site was identified as Lys599 on myosin. The hydrophilic and hydrophobic hotspot residues of the peptides worked synergistically to stabilize the myosin structure in frozen surimi.
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Affiliation(s)
- Yueying Zhai
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, Hunan Province, China; Hunan Provincial Engineering Technology Research Center of Aquatic Food Resources Processing, Changsha 410114, Hunan Province, China
| | - Wanqi Peng
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, Hunan Province, China
| | - Wei Luo
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, Fujian Province, China
| | - Jinhong Wu
- Department of Food Science and Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yongle Liu
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, Hunan Province, China; Hunan Provincial Engineering Technology Research Center of Aquatic Food Resources Processing, Changsha 410114, Hunan Province, China
| | - Faxiang Wang
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, Hunan Province, China; Hunan Provincial Engineering Technology Research Center of Aquatic Food Resources Processing, Changsha 410114, Hunan Province, China
| | - Xianghong Li
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, Hunan Province, China; Hunan Provincial Engineering Technology Research Center of Aquatic Food Resources Processing, Changsha 410114, Hunan Province, China.
| | - Jian Yu
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, Hunan Province, China; Hunan Provincial Engineering Technology Research Center of Aquatic Food Resources Processing, Changsha 410114, Hunan Province, China
| | - Shaoyun Wang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, Fujian Province, China.
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20
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Chen Q, Wang Y, Zhao ZP, Cai W. Emerging algal organic matter from simulated on-line chemical cleaning of ultrafiltration membranes treating algae-containing water. Sci Total Environ 2024; 907:167893. [PMID: 37865257 DOI: 10.1016/j.scitotenv.2023.167893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 10/05/2023] [Accepted: 10/15/2023] [Indexed: 10/23/2023]
Abstract
Massive reproduction of algae due to the eutrophication of water body poses a new challenge to the water ecosystem. Despite ultrafiltration (UF) acting as an effective method to treat algae-containing waters, on-line chemical cleaning is frequently utilized to sustain the permeability of UF membranes. However, little attention is currently paid on the side-effects of practical on-line chemical cleaning on aqueous environments. Therefore, this work evaluated the generation of algae organic matter triggered by diverse membrane cleaning reagents (i.e., HCl, NaOH, NaClO, SDS and CA), and their subsequent fate in terms of biodegradation and membrane retention. The results indicated that NaOH, HCl and NaClO caused serious damage and lysis of algal cells, leading to the significant release of dissolved organic matter (DOM), while CA and SDS induced negligible DOM release. The occurrence of DOM release was able to cause extra biofouling, thus deteriorating the UF permeability. Furthermore, DOM was characterized in terms of three molecular weight ranges, i.e., high molecular weight (HMW, > 3400 Da), medium molecular weight (MMW, 150-3400 Da), and low molecular weight (LMW, <150 Da). Protein-related substances in the range of HMW and MMW were primarily produced under HCl and NaOH exposures. In contrast, NaClO led to an obvious release of humic-like materials with MMW. During the next round of UF operation, roughly 17 % to 31 % of these released DOM could be removed by via the joint actions of suspended algae biodegradation and fouling layer retention. Nevertheless, roughly 69 % to 83 % of these produced DOM eventually entered into the UF permeate, resulting in the deterioration of permeate quality. Consequently, the detailed mechanisms of DOM generation and subsequent removal by UF were proposed, which re-examined the origins of emerging contaminants in aqueous environment and shed new light on the strategies to ameliorate current practice of on-line membrane chemical cleaning.
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Affiliation(s)
- Qiuying Chen
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China
| | - Yuanyuan Wang
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China
| | - Zhi-Ping Zhao
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China
| | - Weiwei Cai
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China.
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21
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Mainardis M, Ferrara C, Cantoni B, Di Marcantonio C, De Feo G, Goi D. How to choose the best tertiary treatment for pulp and paper wastewater? Life cycle assessment and economic analysis as guidance tools. Sci Total Environ 2024; 906:167598. [PMID: 37802362 DOI: 10.1016/j.scitotenv.2023.167598] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 08/28/2023] [Accepted: 10/03/2023] [Indexed: 10/10/2023]
Abstract
Pulp and paper wastewater (P&P WW) often requires tertiary treatment to remove refractory compounds not eliminated by conventional biological treatment, ensuring compliance with high-quality effluent discharge or reuse standards. This study employs a life cycle assessment (LCA) methodology to compare alternative tertiary treatment technologies for P&P WW and rank them accordingly. The evaluated technologies in the scenarios include inorganic (S1) and organic (S2) coagulation-flocculation, ozonation (O3) (S3), O3+granular activated carbon (GAC) (S4), and ultrafiltration (UF)+reverse osmosis (RO) (S5). The analysis focuses on a P&P wastewater treatment plant (WWTP) in Northeastern Italy. The LCA is complemented by an economic analysis considering each technology's capital and operating costs, as well as potential revenues from internal effluent reuse. Results indicate that S4 (O3+GAC) outranks all the other scenarios in terms of both environmental performance and economic viability, primarily due to the advantages associated with effluent reuse. S5 (UF+RO), which also involves reuse, is limited by the high energy consumption of UF+RO, resulting in increased environmental impacts and costs. The physicochemical scenario S2 (Chem Or), currently utilized in the WWTP under study, remains the best-performing technology in the absence of effluent reuse. In contrast, S3 (O3 alone) exhibits the poorest environmental and economic outcomes due to substantial energy requirements for O3 generation and the inability to reuse the treated effluent directly. Lastly, a sensitivity analysis underscores the strong influence of chemical dosages in S1 and S2 on environmental and economic impacts, which is more significant than the impact of water reuse percentages in S4 and S5. The high electricity cost observed during 2022 negatively affects the energy-intensive scenarios (S3-S5), making coagulation-flocculation (S1-S2) even more convenient.
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Affiliation(s)
- Matia Mainardis
- University of Udine, Polytechnic Department of Engineering and Architecture (DPIA), Via del Cotonificio 108, 33100 Udine, Italy.
| | - Carmen Ferrara
- University of Salerno, Department of Industrial Engineering, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Beatrice Cantoni
- Politecnico di Milano, Department of Civil and Environmental Engineering (DICA) - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Camilla Di Marcantonio
- Sapienza University of Rome, Department of Civil, Building and Environmental Engineering (DICEA), Via Eudossiana 18, 00184 Rome, Italy
| | - Giovanni De Feo
- University of Salerno, Department of Industrial Engineering, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Daniele Goi
- University of Udine, Polytechnic Department of Engineering and Architecture (DPIA), Via del Cotonificio 108, 33100 Udine, Italy
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22
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Wu Z, Ji X, He Q, Gu H, Zhang WX, Deng Z. Nanocelluloses fine-tuned polyvinylidene fluoride (PVDF) membrane for enhanced separation and antifouling. Carbohydr Polym 2024; 323:121383. [PMID: 37940278 DOI: 10.1016/j.carbpol.2023.121383] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 09/01/2023] [Accepted: 09/10/2023] [Indexed: 11/10/2023]
Abstract
To mitigate membrane fouling and address the trade-off between permeability and selectivity, we fabricated nanocellulose (NC) fine-tuned polyvinylidene fluoride (PVDF) porous membranes (NC-PVDFs) using phase inversion method through blending NCs with varied aspect ratios, surface charges and grafted functional groups. NC-PVDF presented rougher surface (increased by at least 18.3 %), higher porosity and crystallinity compared to PVDF membrane. Moreover, cellulose nanocrystals incorporated PVDF (CNC-PVDF) elevated membrane surface charge and hydrophilicity (from 74.3° to 71.7°), while 2,2,6,6-tetramethylpiperidine-1-oxyl-oxidized cellulose nanofibers modified PVDF (TCNF-PVDF) enhanced the porosity (from 25.0 % to 40.3 %) and tensile strength (63.6 % higher than PVDF). For separation performance, NC improved flux, rejection and fouling resistance due to facilitation of phase transition thermokinetics as pore-forming agent and increased hydrophilicity at both interface and pore wall. For water flux, NC-PVDFs (139-228 L·m-2·h-1) resulted in increased permeability compared to bare PVDF. CNC-PVDF membrane exhibited the highest water flux because of improved porosity, roughness and hydrophilicity. For bovine serum albumin (BSA) rejection, the removal rates of all NC-PVDFs were all above 90 %. Notably, TCNF-PVDF exhibited the most remarkable elevation of BSA rejection (95.1 %) owing to size exclusion and charge repulsion in comparison with PVDF.
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Affiliation(s)
- Zixuan Wu
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Xin Ji
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Quanlong He
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Hongbo Gu
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China
| | - Wei-Xian Zhang
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Zilong Deng
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
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23
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Li JJ, Wang WQ, Zhou JY, Tang CC. Ionic regulation whey protein composition on membrane fouling during ultrafiltration process analyzed by HPLC. Int J Biol Macromol 2024; 254:127751. [PMID: 38287593 DOI: 10.1016/j.ijbiomac.2023.127751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 10/20/2023] [Accepted: 10/26/2023] [Indexed: 01/31/2024]
Abstract
In order to meet the market demand and avoid the increase of operation amount and cleaning cost in the process of ultrafiltration, it is particularly important to find more practical and efficient methods to control and improve membrane fouling. In this study, the ions in the ultrafiltration process were regulated to affect membrane surface proteins composition (lactoferrin, α-lactalbumin, β-lactoglobulin A and β-lactoglobulin B) and delay membrane fouling. It was found that Na+ (21 mmol/L), Zn2+ (0.25 mmol/L) and K+ (44 mmol/L) was added at 4 min, 8 min and 12 min, respectively during ultrafiltration process. The continuous regulation slowed down the decline rate of membrane flux and reduced the content of α-lactalbumin, β-lactoglobulin A and β-lactoglobulin B on the membrane surface analyzed by HPLC. This could reduce the irreversible membrane fouling of proteins cake resistance. Furthermore, the ions concentration was also investigated after filtration. The concentration of K+ was increased significantly and other ions concentration was not significantly changed after continuous regulation such Na+, Mg2+, Zn2+ and Ca2+ compared to control. Therefore, dynamic ionic regulation of whey protein ultrafiltration process is a simple and effective method, which provides technical theoretical basis for optimizing and improving membrane technology.
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Affiliation(s)
- Jian-Ju Li
- College of Food Science and Engineering, Yangzhou University, Yangzhou, 225127, Jiangsu, China
| | - Wen-Qiong Wang
- College of Food Science and Engineering, Yangzhou University, Yangzhou, 225127, Jiangsu, China.
| | - Ji-Yang Zhou
- College of Food Science and Engineering, Yangzhou University, Yangzhou, 225127, Jiangsu, China
| | - Cong-Cong Tang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, China.
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24
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Schmidt S, Holzgrabe U. Do the enantiomers of ketamine bind enantioselectively to human serum albumin? Eur J Pharm Sci 2024; 192:106640. [PMID: 37979888 DOI: 10.1016/j.ejps.2023.106640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 11/08/2023] [Accepted: 11/11/2023] [Indexed: 11/20/2023]
Abstract
The binding of drugs to plasma proteins is an important process in the human body and has a significant influence on pharmacokinetic parameter. Human serum albumin (HSA) has the most important function as a transporter protein. The binding of ketamine to HSA has already been described in literature, but only of the racemate. The enantiomerically pure S-ketamine is used as injection solution for induction of anesthesia and has been approved by the Food and Drug Administration for the therapy of severe depression as a nasal spray in 2019. The question arises if there is enantioselective binding to HSA. Hence, the aim of this study was to investigate whether there is enantioselective binding of S-and R-ketamine to HSA or not. Ultrafiltration (UF) followed by chiral capillary electrophoretic analysis was used to determine the extent of protein binding. Bound fraction to HSA was 71.2 % and 64.9 % for enantiomerically pure R- and S-ketamine, respectively, and 66.5 % for the racemate. Detailed binding properties were studied by Saturation Transfer Difference (STD)-, waterLOGSY- and Carr-Purcell-Meiboom-Gill (CPMG)-NMR spectroscopy. With all three methods, the aromatic ring and the N-methyl group could be identified as the structural moieties most strongly involved in binding of ketamine to HSA. pKaff values determined using UF and NMR indicate that ketamine is a weak affinity ligand to HSA and no significant differences in binding behavior were found between the individual enantiomers and the racemate.
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Affiliation(s)
- Sebastian Schmidt
- Institute for Pharmacy and Food Chemistry, Am Hubland, D-97074 Wuerzburg, Germany
| | - Ulrike Holzgrabe
- Institute for Pharmacy and Food Chemistry, Am Hubland, D-97074 Wuerzburg, Germany.
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25
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Larsen F, Jakobsen RR, Mao X, Castro-Mejia J, Deng L, Nielsen DS. Purification and Up-Concentration of Bacteriophages and Viruses from Fecal Samples. Methods Mol Biol 2024; 2738:105-110. [PMID: 37966594 DOI: 10.1007/978-1-0716-3549-0_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
The viral fraction of human and experimental animal fecal matter is increasingly attracting research interest due to its newfound influence on the gut microbiome and host health. During the past decade, high-throughput sequencing techniques have seen massive improvements, and in recent years, bioinformatics pipelines for virome analysis have also vastly improved with respect to both user-friendliness and output quality. Yet, the shape and quality of such data are highly dependent on how the viruses are isolated and their genomes extracted and processed to build sequencing libraries.Here we describe a simple protocol for virus isolation from fecal samples suitable for further propagation/characterization or sequencing efforts. It is based on two filtration steps: one for removing large particles such as bacteria and one for removing free DNA and up-concentrating phages and other viruses in the solution. The method is highly scalable, adaptable to a long range of sample types including low-input samples, and has a quantifiable output suitable for both plaquing and sequencing.
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Affiliation(s)
- Frej Larsen
- University of Copenhagen, Frederiksberg C, Denmark.
| | | | - Xiaotian Mao
- University of Copenhagen, Frederiksberg C, Denmark
| | | | - Ling Deng
- University of Copenhagen, Frederiksberg C, Denmark
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26
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Mégret-Cavalier M, Pozza A, Cece Q, Bonneté F, Broutin I, Phan G. Starting with an Integral Membrane Protein Project for Structural Biology: Production, Purification, Detergent Quantification, and Buffer Optimization-Case Study of the Exporter CntI from Pseudomonas aeruginosa. Methods Mol Biol 2024; 2715:415-430. [PMID: 37930543 DOI: 10.1007/978-1-0716-3445-5_26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
Production, extraction, purification, and stabilization of integral membrane proteins are key steps for successful structural biology studies, in particular for X-ray crystallography or single particle microscopy. Here, we present the purification protocol of CntI from Pseudomonas aeruginosa, a new metallophore exporter of the Drug Metabolite Transporter (DMT) family involved in pseudopaline secretion. Subsequent to CntI purification, we optimized the buffer pH, salts, and additives by differential scanning fluorimetry (DSF), also known as Thermofluor Assay (TFA) or fluorescent thermal stability assay (FTSA), with the use of dye 1-AnilinoNaphthalene-8-Sulfonic acid (ANS), a fluorescent molecule compatible with detergents. After the buffer optimization, the purified CntI was analyzed by Size Exclusion Chromatography coupled with Multi-Angle Laser Light Scattering (SEC-MALLS), UV absorbance, and Refractive Index detectors, in order to determine the absolute molar mass of the protein-detergent complex, the detergent amount bound to the protein and the amount of protein-free detergent micelles. Altogether, these biophysical techniques give preliminary and mandatory information about the suitability of the purified membrane protein for further biophysical or structural investigations.
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Affiliation(s)
- Maxime Mégret-Cavalier
- Université Paris Cité, CNRS, UMR 8038, Laboratoire CiTCoM (Cibles Thérapeutiques et Conception de Médicaments), Faculté de Pharmacie de Paris, Paris, France
| | - Alexandre Pozza
- Université Paris Cité, CNRS, UMR 7099, Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, Institut de Biologie Physico-Chimique, Paris, France
| | - Quentin Cece
- Université Paris Cité, CNRS, UMR 8038, Laboratoire CiTCoM (Cibles Thérapeutiques et Conception de Médicaments), Faculté de Pharmacie de Paris, Paris, France
| | - Françoise Bonneté
- Université Paris Cité, CNRS, UMR 7099, Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, Institut de Biologie Physico-Chimique, Paris, France
| | - Isabelle Broutin
- Université Paris Cité, CNRS, UMR 8038, Laboratoire CiTCoM (Cibles Thérapeutiques et Conception de Médicaments), Faculté de Pharmacie de Paris, Paris, France.
| | - Gilles Phan
- Université Paris Cité, CNRS, UMR 8038, Laboratoire CiTCoM (Cibles Thérapeutiques et Conception de Médicaments), Faculté de Pharmacie de Paris, Paris, France.
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27
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Ranchin B, Schmitt CP, Warady BA, Hataya H, Jones J, Lalji R, Licht C, Mosca M, Stronach L, Vidal E, Walle JV, Shroff R. Technical requirements and devices available for long-term hemodialysis in children-mind the gap! Pediatr Nephrol 2023:10.1007/s00467-023-06233-0. [PMID: 38141144 DOI: 10.1007/s00467-023-06233-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/10/2023] [Accepted: 11/13/2023] [Indexed: 12/24/2023]
Abstract
Children requiring long-term kidney replacement therapy are a "rare disease" cohort. While the basic technical requirements for hemodialysis (HD) are similar in children and adults, key aspects of the child's cardiovascular anatomy and hemodynamic specifications must be considered. In this article, we describe the technical requirements for long-term HD therapy for children and the devices that are currently available around the world. We highlight the characteristics and major technical shortcomings of permanent central venous catheters, dialyzers, dialysis machines, and software available to clinicians who care for children. We show that currently available HD machines are not equipped with appropriately small circuits and sensitive control mechanisms to perform safe and effective HD in the youngest patients. Manufacturers limit their liability, and health regulatory agencies permit the use of devices, only in children according to the manufacturers' pre-specified weight limitations. Although registries show that 6-23% of children starting long-term HD weigh less than 15 kg, currently, there is only one long-term HD device that is cleared for use in children weighing 10 to 15 kg and none is available and labelled for use in children weighing less than 10 kg anywhere in the world. Thus, many children are being treated "off-label" and are subject to interventions delivered by medical devices that lack pediatric safety and efficacy data. Moreover, recent improvements in dialysis technology offered to adult patients are denied to most children. We, in turn, advocate for concerted action by pediatric nephrologists, industry, and health regulatory agencies to increase the development of dedicated HD machines and equipment for children.
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Affiliation(s)
- Bruno Ranchin
- Pediatric Nephrology Unit, Hôpital Femme Mère Enfant, Hospices Civils de Lyon, Université de Lyon, Lyon, France.
- Centre de référence des maladies rénales rares, Hôpital Femme Mère Enfant, Hospices Civils de Lyon, 59 boulevard Pinel, 69677, Bron Cedex, France.
| | - Claus Peter Schmitt
- Pediatric Nephrology, Center for Pediatrics and Adolescent Medicine, University of Heidelberg, Heidelberg, Germany
| | - Bradley A Warady
- Division of Nephrology, Department of Pediatrics, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Hiroshi Hataya
- Department of Nephrology, Tokyo Metropolitan Children's Medical Center, Fuchu, Japan
- Department of Pediatrics, School of Medicine, Keio University, Shinjuku-ku, Tokyo, Japan
| | - Joanne Jones
- Queensland Children's Hospital, University of Queensland, Brisbane, Australia
| | - Rowena Lalji
- Centre for Kidney Disease Research, University of Queensland, Brisbane, Australia
- Department of Nephrology, Queensland Children's Hospital, Brisbane, Australia
- Metro South and Integrated Nephrology and Transplant Services, Princess Alexandra Hospital, Brisbane, Australia
| | - Christoph Licht
- Department of Pediatrics, University of Toronto, Toronto, ON, Canada
- Division of Nephrology and Research Institute, Cell Biology Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Melodie Mosca
- Pediatric Nephrology Unit, Hôpital Femme Mère Enfant, Hospices Civils de Lyon, Université de Lyon, Lyon, France
| | - Lynsey Stronach
- University College London Great Ormond Street Hospital and Institute of Child Health, London, UK
| | - Enrico Vidal
- Pediatric Nephrology Unit, Department for Woman and Child's Health, University-Hospital of Padua, Padua, Italy
| | - Johan Vande Walle
- Department of Pediatric Nephrology, Ghent University Hospital, Ghent, Belgium
| | - Rukshana Shroff
- University College London Great Ormond Street Hospital and Institute of Child Health, London, UK
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28
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Shen W, Zhang H, Li X, Qi D, Liu R, Kang G, Liu J, Li N, Zhang S, Hu S. Pathogens and antibiotic resistance genes during the landfill leachate treatment process: Occurrence, fate, and impact on groundwater. Sci Total Environ 2023; 903:165925. [PMID: 37544439 DOI: 10.1016/j.scitotenv.2023.165925] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 07/28/2023] [Accepted: 07/29/2023] [Indexed: 08/08/2023]
Abstract
Landfill leachate is an essential source of pathogens and antibiotic resistance genes (ARGs) in the environment. However, information on the removal behavior of pathogens and ARGs during the leachate treatment and the impact on surrounding groundwater is limited. In this study, we investigated the effects of leachate treatment on the removal of pathogens and ARGs with metagenomic sequencing, as well as the impact of landfill effluent on groundwater. It is shown that the leachate treatment could not completely remove pathogens and ARGs. Twenty-nine additional pathogens and twenty-nine ARGs were newly identified in the landfill effluent. The relative abundance of pathogens and multiple antibiotic resistance genes decreased after ultrafiltration but relative abundance increased after reverse osmosis. In addition, the relative abundances of Acinetobacter baumannii, Erwinia amylovora, Escherichia coli, Fusarium graminearum, Klebsiella pneumoniae, and Magnaporthe oryzae, as well as mdtH, VanZ, and blaOXA-53 increased significantly in the landfill effluent compared to the untreated leachate. The relative abundance of some mobile genetic elements (tniA, tniB, tnpA, istA, IS91) in leachate also increased after ultrafiltration and reverse osmosis. The size of pathogens, the size and properties of ARGs and mobile genetic elements, and the materials of ultrafiltration and reverse osmosis membranes may affect the removal effect of pathogens, ARGs and mobile genetic elements in leachate treatment process. Interestingly, the pathogens and ARGs in landfill effluent were transferred to groundwater according to SourceTracker. The ARGs, mobile genetic elements, and pathogens that are difficult to remove in the leachate treatment process, provide a reference for optimizing the leachate treatment process and improving the control of pathogens and ARGs. Furthermore, this study clarifies the effect of landfill leachate sources of pathogens and ARGs in groundwater.
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Affiliation(s)
- Weitao Shen
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China; Key Laboratory of Environment Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Houhu Zhang
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Xuejian Li
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China; Department of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Dan Qi
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Ran Liu
- Key Laboratory of Environment Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China
| | - Guodong Kang
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Jinglong Liu
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Nan Li
- Zhongda Hospital Southeast University, Nanjing 210009, China
| | - Shenghu Zhang
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China.
| | - Shuangqing Hu
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, Shanghai Academy of Environment Sciences, Shanghai 200233, China.
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29
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Matsumoto T, Yoshida K, Shinohara T, Miyoshi E, Ueno T. Development of new colloid osmotic pressure measurement method using ultrafiltration membrane during cardiopulmonary bypass. J Extra Corpor Technol 2023; 55:167-174. [PMID: 38099630 PMCID: PMC10723525 DOI: 10.1051/ject/2023028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 07/07/2023] [Indexed: 12/17/2023]
Abstract
BACKGROUND Clinical practice of measuring colloid osmotic pressure (COP) was abandoned after correcting hypoosmolarity did not improve overall patient outcomes. However, the use of albumin and colloidal solutions has contributed to maintaining intraoperative and postoperative fluid balance at lower levels. Reduced perioperative fluid balance is consistently reported to have positive effects on clinical outcomes. Priming solutions for cardiopulmonary bypass typically include colloids; however, the optimal type of priming solution has not yet been determined. Stricter COP management may further improve postoperative courses. To achieve this, the widespread adoption of a measurement method suitable for COP monitoring during cardiopulmonary bypass is required. METHODS A test circuit was made which measured COP using an ultrafiltration membrane method based on the changes in hydrostatic pressure that occurs across a semipermeable membrane. We then compared the measurements obtained using this method with colloidal osmometer measurements. RESULTS COP measurements were obtained for a total of 100 tests (10 times each for 10 test solutions). The evaluation parameters included simultaneous reproducibility, correlation with the colloid osmometer, and measurement time. The results demonstrated high accuracy of the ultrafiltration membrane method, simultaneous reproducibility within 3%, a high positive correlation with the colloid osmometer (correlation coefficient: R2 = 0.99; p < 0.01), and equal time required for measurement. CONCLUSION Measuring COP using ultrafiltration membranes solves problems within existing measurement methods. Although further improvements in the method are necessary, it has implications for future research and clinical applications.
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Affiliation(s)
- Takeshi Matsumoto
- Department of Functional Diagnostic Science, Division of Health Sciences, Osaka University Graduate School of Medicine 1–7, Suita-shi Osaka-fu 565-0871 Japan
- Department of Nursing Practice Development, Division of Nursing Science, Osaka University Graduate School of Medicine 1–7, Suita-shi Osaka-fu 565-0871 Japan
| | - Kiyoshi Yoshida
- Department of Future Medical therapy, Division of Health Sciences, Osaka University, Graduate School of Medicine 1–7, Suita-shi Osaka-fu 565-0871 Japan
| | - Tomotaka Shinohara
- Department of Functional Diagnostic Science, Division of Health Sciences, Osaka University Graduate School of Medicine 1–7, Suita-shi Osaka-fu 565-0871 Japan
- Department of Nursing Practice Development, Division of Nursing Science, Osaka University Graduate School of Medicine 1–7, Suita-shi Osaka-fu 565-0871 Japan
| | - Eiji Miyoshi
- Department of Functional Diagnostic Science, Division of Health Sciences, Osaka University Graduate School of Medicine 1–7, Suita-shi Osaka-fu 565-0871 Japan
| | - Takayoshi Ueno
- Department of Nursing Practice Development, Division of Nursing Science, Osaka University Graduate School of Medicine 1–7, Suita-shi Osaka-fu 565-0871 Japan
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Ramos-Gordillo JM, Pérez-Campuzano C, Relles-Andrade E, Peña-Rodríguez JC. The role of plasma volume and fluid overload in the tolerance to ultrafiltration and hypotension in hemodialysis patients. Ren Fail 2023; 45:2151917. [PMID: 36632765 PMCID: PMC9848374 DOI: 10.1080/0886022x.2022.2151917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
INTRODUCTION Ultrafiltration (UF) in hemodialysis (HD) patients is accompanied by irregular falls in plasma volume (PV) and blood pressure (BP). METHODS We obtained in 321 patients (large cohort), body weight (BW), BP, samples of blood to determine hemoglobin (Hb) and hematocrit (Ht), Pre and Post HD. We estimated the % variation of the PV and its effect on the BP. In a small cohort of 38/321 patients, arterial blood was drawn Pre and Post HD and at 2, 48, and 72 h to determined Hb and Ht and % variation of the PV. Bio-impedance spectroscopy (BIS) was performed, in the same times, to estimate: dry weight (DW), total body water (TBW), extracellular water (ECW), Fluid overload (FO) and phase angle (PhA). RESULTS We divided our large cohort in two groups. The Hypotensive group with a fall equal or more than 20 mmHg (96/321,30%) and Normotensive group with a drop equal or less than 19 mmHg (225/321,70%). The UF was 2.73 ± 0.72 L in the Hypotensive group and 2.53 ± 0.85 L in the Normotensive group (p < 0.0001). The % PV was -11.7 ± 17.8 in the Hypotensive group and -8.53 ± 10.07 in the Normotensive group (p < 0.0001). The systolic blood pressure (SBP) correlated with the % change of the PV (r = -0.232; p < 0.0001). The FO was contrasted with the % of water removed by UF (r = -0.890; p < 0.0001). CONCLUSION The SBP drop was secondary to the fall in the PV after UF. The FO was irregular and modulates in part the fall in the SBP.
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Affiliation(s)
| | | | | | - José Carlos Peña-Rodríguez
- Centro de Diagnóstico Ángeles (CEDIASA), Mexico City, México D.F.,CONTACT José Carlos Peña Avenida Ejercito Nacional No 516 esquina Temístocles, Colonia Polanco, Alcaldía Miguel Hidalgo, Mexico City, CP.11550, México D.F
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Wen A, Qin ARR, Tarnowski T, Ling KHJ, Zhang H, Humeniuk R, Regan S, Saquing J, Liu W, Venkatarangan L, Xiao D. Plasma Protein Binding Determination for Unstable Ester Prodrugs: Remdesivir and Tenofovir Alafenamide. J Pharm Sci 2023; 112:3224-3232. [PMID: 37722451 DOI: 10.1016/j.xphs.2023.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 09/11/2023] [Accepted: 09/12/2023] [Indexed: 09/20/2023]
Abstract
Remdesivir (RDV) and tenofovir alafenamide (TAF) are prodrugs designed to be converted to their respective active metabolites. Plasma protein binding (PPB) determination of these prodrugs is important for patients with possible alteration of free fraction of the drugs due to plasma protein changes in renal impairment, hepatic impairment, or pregnancy. However, the prodrugs' instability in human plasma presents a challenge for accurate PPB determination. In this research work, two approaches were used in the method development and qualification for PPB assessment of RDV and TAF. For RDV, dichlorvos was used to inhibit esterase activity to stabilize the prodrug in plasma during equilibrium dialysis (ED). The impact of dichlorvos on protein binding was evaluated and determined to be insignificant by comparing the unbound fraction (fu) determined by the ED method with dichlorvos present and the fu determined by an ultrafiltration method without dichlorvos. In contrast to RDV, TAF degradation in plasma is ∼3-fold slower, and TAF stability cannot be improved by dichlorvos. Fit-for-purpose acceptance criteria for the TAF PPB method were chosen, and an ED method was developed based on these criteria. These two methods were then qualified and applied for PPB determinations in clinical studies.
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Affiliation(s)
- Anita Wen
- Department of Clinical Pharmacology, Gilead Sciences, Foster City, CA, USA; Department of Nutrition, University of California, Davis, CA, USA
| | - Ann Ran-Ran Qin
- Department of Clinical Pharmacology, Gilead Sciences, Foster City, CA, USA
| | - Thomas Tarnowski
- Department of Clinical Pharmacology, Gilead Sciences, Foster City, CA, USA
| | | | - Haeyoung Zhang
- Department of Clinical Pharmacology, Gilead Sciences, Foster City, CA, USA
| | - Rita Humeniuk
- Department of Clinical Pharmacology, Gilead Sciences, Foster City, CA, USA
| | - Sean Regan
- Department of Clinical Pharmacology, Gilead Sciences, Foster City, CA, USA
| | | | | | | | - Deqing Xiao
- Department of Clinical Pharmacology, Gilead Sciences, Foster City, CA, USA.
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Yang L, Qiu H, Lu Z, Zhang C, Liu G, Chang J, Wu C, Dong S, Yang S, Xiao F. Identification of performance and cost in a new backwash method to clean the UF membrane: backwashing with low dosage of NaClO. Environ Sci Pollut Res Int 2023; 30:121983-121992. [PMID: 37964145 DOI: 10.1007/s11356-023-31008-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 11/07/2023] [Indexed: 11/16/2023]
Abstract
Ultrafiltration (UF) is widely used in wastewater reclamation treatments. Conventional backwashing is usually performed at regular time intervals (10-120 min) with permeate and without the addition of chemicals. Chemical enhanced backwashing (CEB) is usually applied after 70-90 filtration cycles with added chemicals. These cleaning methods cause membrane fouling and require costly chemicals. Instead of conventional backwashing, we propose herein a new backwashing method involving backwashing the effluent with low doses of sodium hypochlorite (NaClO) named as BELN. The performance and cost of UF backwashing were investigated with Beijing wastewater reclamation treatment. The results showed that the transmembrane pressure (TMP) increased from 33.2 to 48.2 kPa during hydraulic backwashing after 80 filtration cycles but increased from 33.3 to 39.3 kPa during backwashing with a low NaClO content of 20 mg/L. It was also noticed that the hydraulic-irreversible fouling index decreased from 5.58 × 10-3 m2/L to 3.58 × 10-3 m2/L with the new method. According to the three-dimensional fluorescence excitation-emission (3D-EEM), the response increased from 11.9 to 15.2% with BELN. Protein-like material was identified as the main component causing membrane fouling by blocking the membrane pores. The results indicated that the low dosage of NaClO effectively stripped the fouling layer. Finally, based on an economic evaluation, the capacity of the UF process was increased from 76,959 to 109,133 m3/d with the new method. The amount of NaClO consumed for Beijing wastewater reclamation treatment was similarly compared with the conventional backwashing in per year under BELN. The new method has good potential for application.
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Affiliation(s)
- Lian Yang
- School of Water Resources and Hydropower Engineering, North China Electric Power University, Beijing, 102206, China
- Beijing Engineering Research Center for Wastewater Reuse, Beijing, 100124, China
- Beijing Drainage Group Co. Ltd., Beijing, 100044, China
| | - Haoran Qiu
- Beijing Engineering Research Center for Wastewater Reuse, Beijing, 100124, China
- Beijing Drainage Group Co. Ltd., Beijing, 100044, China
| | - Zixin Lu
- Beijing Engineering Research Center for Wastewater Reuse, Beijing, 100124, China
- Beijing Drainage Group Co. Ltd., Beijing, 100044, China
| | - Chunrui Zhang
- Beijing Engineering Research Center for Wastewater Reuse, Beijing, 100124, China
- Beijing Drainage Group Co. Ltd., Beijing, 100044, China
| | - Guoliang Liu
- Beijing Engineering Research Center for Wastewater Reuse, Beijing, 100124, China
- Beijing Drainage Group Co. Ltd., Beijing, 100044, China
| | - Jiang Chang
- Beijing Engineering Research Center for Wastewater Reuse, Beijing, 100124, China
- Beijing Drainage Group Co. Ltd., Beijing, 100044, China
| | - Congcong Wu
- Beijing Engineering Research Center for Wastewater Reuse, Beijing, 100124, China
- Beijing Drainage Group Co. Ltd., Beijing, 100044, China
| | - Shuoxun Dong
- School of Water Resources and Hydropower Engineering, North China Electric Power University, Beijing, 102206, China
| | - Shaoxia Yang
- School of Water Resources and Hydropower Engineering, North China Electric Power University, Beijing, 102206, China
| | - Feng Xiao
- School of Water Resources and Hydropower Engineering, North China Electric Power University, Beijing, 102206, China.
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Satouf M. The effect of adding concentrated cheese whey prepared by ultrafiltration on the quality of Syrian bread. J Food Sci Technol 2023; 60:3102-3110. [PMID: 37786604 PMCID: PMC10542038 DOI: 10.1007/s13197-023-05823-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/11/2023] [Accepted: 08/20/2023] [Indexed: 10/04/2023]
Abstract
The objective of this study is to evaluate the effect of adding two types cheese whey (W) contaning 0.9% protein and concentrated cheese whey (CW) containing 7.61% protein on the physical, chemical and sensory properties of Syrian bread. Concentrated whey samples were prepared using a UF membrane unit of 15 KDa at 25 °C and 4 bars. Both W and CW samples were added to wheat flour (72% extraction rate) at dilution level: 0, 25, 50, 75, and 100% levels. The effects of W and CW on dough rheology were evaluated using farinograph and alveograph parameters. The addition of 25% W or 50% CW improved the dough stability in the farinogram, as well as pressure and energy values in the alveogram. Significant increases were observed in ash, minerals (Ca, K, Mg, and P), and protein content (13.8%) when 50% CW was added to the dough. The results of sensory analysis showed that Syrian bread containing 25% whey (W) or 50% whey concentrate (CW) has achieved highest overall acceptability scores than control.
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Affiliation(s)
- Mustafa Satouf
- Nursing Department, Faculty of Yusuf Şerefoğlu Health Sciences, Kilis 7 Aralık University, Kilis, Turkey
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Shabeeb KM, Noori WA, Abdulridha AA, Majdi HS, Al-Baiati MN, Yahya AA, Rashid KT, Németh Z, Hernadi K, Alsalhy QF. Novel partially cross-linked nanoparticles graft co-polymer as pore former for polyethersulfone membranes for dyes removal. Heliyon 2023; 9:e21958. [PMID: 38034800 PMCID: PMC10682142 DOI: 10.1016/j.heliyon.2023.e21958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 10/22/2023] [Accepted: 11/01/2023] [Indexed: 12/02/2023] Open
Abstract
A newly developed water-soluble polymeric nano-additive termed "partially cross-linked nanoparticles graft copolymer (PCLNPG)" has been successfully synthesized and harnessed as a pore former for modifying a polyethersulfone ultrafiltration membrane for dyes removal. The PCLNPG content was varied in the PES polymeric matrix aiming to scrutinize its impact on membrane surface characteristics, morphological structure, and overall performance. Proposed interaction mechanism between methylene blue (MB), methyle orange (MO), and malachite green (MG) dyes with PES membrane was presented as well. Hydrophilicity and porosity of the novel membrane increased by 18 and 17 %, respectively, when manufactured with a 3 Wt. % PCLNPG, according to the findings. Besides this, the disclosed increased porosity, rather than the hydrophilic properties of the water-soluble PCLNPG, was the principal cause of the diminished contact angle. Meanwhile, raising the PCLNPG content in the prepared membrane made worthy shifts in its structure. A sponge-like region was materialized near the bottom surface as well. The membrane's pure water flux (PWF) synthesized with 3 Wt.% PCLNPG recorded 628 LMH, which is estimated 3.95 fold the pristine membrane. MG, MB, and MO dyes were rejected by 90.6, 96.3, and 97.87 %, respectively. These findings showed that the performance characteristics of the PES/PCLNPG membrane make it a potentially advantageous option to treat the textile wastewater.
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Affiliation(s)
- Kadhum M. Shabeeb
- Department of Materials Engineering, University of Technology- Iraq, Alsinaa Street 52, 10066 Baghdad, Iraq
| | - Wallaa A. Noori
- Membrane Technology Research Unit, Chemical Engineering Department, University of Technology- Iraq, Alsinaa Street 52, 10066 Baghdad, Iraq
| | | | - Hasan Sh Majdi
- Department of Chemical Engineering and Petroleum Industries, Al-Mustaqbal University, Babylon, 51001, Iraq
| | - Mohammad N. Al-Baiati
- Department of Chemistry, College of Education for Pure Sciences, University of Kerbala, 56001, Kerbala, Iraq
| | - Ali A. Yahya
- Membrane Technology Research Unit, Chemical Engineering Department, University of Technology- Iraq, Alsinaa Street 52, 10066 Baghdad, Iraq
| | - Khalid T. Rashid
- Membrane Technology Research Unit, Chemical Engineering Department, University of Technology- Iraq, Alsinaa Street 52, 10066 Baghdad, Iraq
| | - Zoltán Németh
- Advanced Materials and Intelligent Technologies Higher Education and Industrial Cooperation Centre, University of Miskolc, H-3515, Miskolc, Hungary
| | - Klara Hernadi
- Advanced Materials and Intelligent Technologies Higher Education and Industrial Cooperation Centre, University of Miskolc, H-3515, Miskolc, Hungary
| | - Qusay F. Alsalhy
- Membrane Technology Research Unit, Chemical Engineering Department, University of Technology- Iraq, Alsinaa Street 52, 10066 Baghdad, Iraq
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Li Y, Zhang Z, Zhao Y, Han Y, Ren L, Sun Y. A comparison of micro-flocculation and ozonation as pretreatments for ultrafiltration: organic removal and membrane fouling. Environ Sci Pollut Res Int 2023; 30:112267-112276. [PMID: 37831270 DOI: 10.1007/s11356-023-30322-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 10/03/2023] [Indexed: 10/14/2023]
Abstract
Micro-flocculation and ozone were applied as pretreatments of ultrafiltration to treat sodium alginate (SA) and humic acid (HA) simulated water, respectively, to investigate the effects of different pretreatments of ultrafiltration (UF) on filtration flux and removal of organic matters. Regarding the SA simulated water, micro-flocculation helped to improve the dissolved organic carbon (DOC) removal efficiency highly, maximum DOC removal efficiency reached to 79.77%, due to the rejection of gel layer introduced by the alginate-aluminum complexes, but the gel layer had a negative impact on membrane flux. Compared with micro-flocculation, ozone as pretreatments had better ability to enhance the membrane specific flux, the maximum final specific flux remained as 0.786, larger than that of MF-UF process (0.574). Ozonation oxidizing SA into small organic molecules significantly reduced membrane fouling and filtration resistance, but also produced some dissolved organic matters hindering DOC removal of effluent. As for HA simulated water, both the micro-flocculation and ozone could effectively improve the specific flux, the final specific flux of MF-UF and ozone-UF were about 0.930, but MF-UF exhibited better DOC removal than ozone-UF, which avoided the introduction of additional dissolved organic matters.
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Affiliation(s)
- Yujiao Li
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China
| | - Zhaoheng Zhang
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
| | - Yikan Zhao
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
| | - Yuting Han
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
| | - Lanxin Ren
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
| | - Yingxue Sun
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China.
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China.
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Cháirez-Jiménez C, Castro-López C, Serna-Saldívar S, Chuck-Hernández C. Partial characterization of canola ( Brassica napus L.) protein isolates as affected by extraction and purification methods. Heliyon 2023; 9:e21938. [PMID: 38027992 PMCID: PMC10654237 DOI: 10.1016/j.heliyon.2023.e21938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 10/31/2023] [Accepted: 10/31/2023] [Indexed: 12/01/2023] Open
Abstract
Canola (Brassica napus L.) meal represents a prominent alternative plant-based source for protein isolation. This work aimed to investigate the combined effect of extraction and purification methods for the production of canola protein isolates (CPIs). CPIs were characterized in terms of process yield, protein recovery, basic composition, amino acid profile, in vitro protein digestibility, techno-functional properties, structural properties, and molecular features. The results showed that the Alk-Uf method enhanced yield (16.23 %) and protein recovery (34.88 %). Meanwhile, the Et-Alk-Uf method exhibited the highest crude protein (89.71 %) and free amino nitrogen (4.34 mg g protein-1) contents. Furthermore, protein digestibility (95.5 %) and protein digestibility corrected amino acid score (1.0) were improved using the Et-Alk-Ac method. Conversely, the amino acid composition, secondary structure, and electrophoretic profiles were generally similar for all CPIs. The Alk-Uf and Et-Alk-Uf methods produced isolates with the highest water solubility (∼39.18 %), water absorption capacity (∼3.86 g water g protein-1), oil absorption capacity (∼2.77 g oil g protein-1), and foaming capacity (∼505.26 %). Finally, the foaming stability (93.75 %) and foaming density (34.38 %) were increased when employing the Alk-Ac method. These findings suggest that, in general, the Alk-Uf and Et-Alk-Uf methods can be used to obtain CPIs with high added value for use in food formulations.
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Affiliation(s)
- Cristina Cháirez-Jiménez
- Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Eugenio Garza Sada 2501, Monterrey, Nuevo León, 64849, Mexico
- Tecnologico de Monterrey, Instituto para la Investigación en Obesidad, Eugenio Garza Sada 2501, Monterrey, Nuevo León, 64849, Mexico
| | - Cecilia Castro-López
- Laboratorio de Química y Biotecnología de Productos Lácteos. Centro de Investigación en Alimentación y Desarrollo A.C. (CIAD A.C.), Carretera Gustavo Enrique Astiazarán Rosas 46, Hermosillo, Sonora, 83304, Mexico
| | - Sergio Serna-Saldívar
- Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Eugenio Garza Sada 2501, Monterrey, Nuevo León, 64849, Mexico
| | - Cristina Chuck-Hernández
- Tecnologico de Monterrey, Instituto para la Investigación en Obesidad, Eugenio Garza Sada 2501, Monterrey, Nuevo León, 64849, Mexico
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Wang Z, Li H, Sun L, Liu B, Gu X. Efficacy and safety of ultrafiltration combined with haemodialysis in patients with uraemia who cannot tolerate dialysis because of hypotension. Acta Cardiol 2023:1-6. [PMID: 37906024 DOI: 10.1080/00015385.2023.2268426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 10/02/2023] [Indexed: 11/02/2023]
Abstract
OBJECTIVE To evaluate the efficacy and safety of ultrafiltration (UF) combined with haemodialysis (HD) sequential therapy in patients with intradialytic hypotension (IDH) and water retention. METHODS A total of 53 uraemia patients with IDH who could not tolerate dehydration and significant water and sodium retention (net weight gain of more than 4 kg) were randomly divided into control group (28 cases) and treatment group (25 cases). After adjusting dialysis parameters (blood pump speed and excessive filtration), HD was tried again in the control group, and UF combined with HD was given sequential treatment in the treatment group. Outcome measures included efficacy measures (duration of treatment, total water removal, weight loss, dyspnoea score and left ventricular ejection fraction) and safety measures (heart rate, blood pressure, IDH incidence, bleeding and thromboembolic events). RESULTS In terms of efficacy indicators, In the sequential treatment group, the duration of treatment (740 ± 168 min vs. 380 ± 94 min, p < 0.05), total water removal (5280 ± 968 mL vs. 2980 ± 765 mL, p < 0.05) and the weight loss (2756 ± 537 g vs. 1421 ± 362 g, p < 0.05) was significantly higher than that of control group. Postoperative dyspnoea score (1.92 ± 0.400 vs. 3.32 ± 0.476, p < 0.05), left ventricular ejection fraction (LVEF; 49.25 ± 3.76 vs. 56.46 ± 4.42, p < 0.05) was significantly improved compared with that before treatment, and the difference was statistically significant. In control group, dyspnoea score (1.89 ± 0.416 vs. 1.82 ± 0.390, p > 0.05) and left ventricular ejection fraction (49.04 ± 6.72 vs. 48.61 ± 7.12, p > 0.05) were slightly improved after treatment, but there was no statistical significance. In terms of safety indicators, patients in the control group were prone to significant blood pressure fluctuation during treatment, and the incidence of IDH was significantly higher than that in the treatment group (75% vs. 0%, p < 0.01), the difference was statistically significant, while the other safety indicators (heart rate change, bleeding and thromboembolic events) showed no statistically significant difference between the two groups. CONCLUSIONS Compared with conventional HD, UF combined with HD can safely and effectively reduce water retention in patients with uraemia while avoiding IDH.
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Affiliation(s)
- Zhen Wang
- Medical College of Yangzhou University, Yangzhou, PR China
- Department of Cardiology, Friendliness Hospital Yangzhou, Yangzhou, PR China
| | - Hongxiao Li
- Department of Cardiovascular Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, PR China
| | - Lei Sun
- Medical College of Yangzhou University, Yangzhou, PR China
- Department of Cardiology, Northern Jiangsu People's Hospital, Yangzhou, PR China
| | - Bin Liu
- Department of Cardiology, Friendliness Hospital Yangzhou, Yangzhou, PR China
| | - Xiang Gu
- Medical College of Yangzhou University, Yangzhou, PR China
- Department of Cardiology, Northern Jiangsu People's Hospital, Yangzhou, PR China
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Yang J, Liu Y, Zhao J, Wang H, Li G, Liang H. Controlling ultrafiltration membrane fouling in surface water treatment via combined pretreatment of O 3 and PAC: Mechanism investigation on impacts of technological sequence. Sci Total Environ 2023; 895:165168. [PMID: 37379911 DOI: 10.1016/j.scitotenv.2023.165168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 06/10/2023] [Accepted: 06/25/2023] [Indexed: 06/30/2023]
Abstract
In this research, the effects of combined powdered activated carbon (PAC)-ozone (O3) pretreatment on ultrafiltration (UF) performance were comprehensively examined and compared with the conventional O3-PAC pretreatment. The performance of pretreatments on mitigating membrane fouling caused by Songhua River water (SHR) was evaluated by specific flux, membrane fouling resistance distribution, and membrane fouling index. Moreover, the degradation of natural organic matter in SHR was investigated by UV absorbance at 254 nm (UV254), dissolved organic carbon (DOC), and fluorescent organic matter. Results showed that the 100PAC-5O3 process was the most effective in improving the specific flux, with 82.89 % and 58.17 % reductions in the reversible fouling resistance and irreversible fouling resistance respectively. Additionally, the irreversible membrane fouling index was reduced by 20 % relative to 5O3-100PAC. The PAC-O3 process also exhibited superior performance in the degradation of UV254, DOC, three fluorescent components, and three micropollutants in the SHR system compared to O3-PAC pretreatment. The O3 stage played a major role in mitigating membrane fouling, while PAC pretreatment enhanced the oxidation in the subsequent O3 stage during the PAC-O3 process. Furthermore, the Extended Derjaguin-Landau-Verwey-Overbeek theory and pore blocking-cake layer filtration model fitting analysis were employed to explain the mechanisms of membrane fouling mitigation and fouling patterns transformation. It was found that PAC-O3 significantly increased the repulsive interactions between the foulants and the membrane, which restrained the formation of the cake layer filtration stage. Overall, this study evidenced the potential of PAC-O3 pretreatment in surface water treatment applications, providing new insights into the mechanism of controlling membrane fouling and improving the permeate quality.
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Affiliation(s)
- Jiaxuan Yang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Yatao Liu
- Beijing Key Laboratory for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China
| | - Jing Zhao
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Hesong Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Guibai Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Heng Liang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
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Cosentino N, Marenzi G, Muratori M, Magrì D, Cattadori G, Agostoni P. Fluid balance in heart failure. Eur J Prev Cardiol 2023; 30:ii9-ii15. [PMID: 37819223 DOI: 10.1093/eurjpc/zwad166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 05/10/2023] [Accepted: 05/12/2023] [Indexed: 10/13/2023]
Abstract
Fluid retention is a major determinant of symptoms in patients with heart failure (HF), and it is closely associated with prognosis. Hence, congestion represents a critical therapeutic target in this clinical setting. The first therapeutic strategy in HF patients with fluid overload is optimization of diuretic intervention to maximize water and sodium excretion. When diuretic therapy fails to relieve congestion, renal replacement therapy represents the only alternative option for fluid removal, as well as a way to restore diuretic responsiveness. On this background, the pathophysiology of fluid balance in HF is complex, with heart, kidney, and lung being deeply involved in volume regulation and management. Therefore, the interplay between these organs should be appreciated and considered when fluid overload in HF patients is targeted.
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Affiliation(s)
- Nicola Cosentino
- Centro Cardiologico Monzino, I.R.C.C.S., Via Parea 4, Milan 20138, Italy
- Cardiovascular Section, Department of Clinical Sciences and Community Health, University of Milan, Milan 20122, Italy
| | - Giancarlo Marenzi
- Centro Cardiologico Monzino, I.R.C.C.S., Via Parea 4, Milan 20138, Italy
| | - Manuela Muratori
- Centro Cardiologico Monzino, I.R.C.C.S., Via Parea 4, Milan 20138, Italy
| | - Damiano Magrì
- Department of Clinical and Molecular Medicine, Azienda Ospedaliera Sant'Andrea, 'Sapienza' Università degli Studi di Roma, Roma 00198, Italy
| | - Gaia Cattadori
- Unità Operativa Cardiologia Riabilitativa, IRCCS Multimedica, Milan 20123, Italy
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40
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Chen S, Zhao Z, Cui F, Liu B. Comparative study of UV/chlorine and VUV/chlorine as ultrafiltration membrane pretreatment techniques: Performance, mechanisms and DBPs formation. J Hazard Mater 2023; 459:132249. [PMID: 37567139 DOI: 10.1016/j.jhazmat.2023.132249] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/27/2023] [Accepted: 08/06/2023] [Indexed: 08/13/2023]
Abstract
Membrane fouling, primarily resulting from natural organic matter (NOM) widely existing in water sources, has always been a chief hindrance for the prevalent application of ultrafiltration (UF). Thus, vacuum ultraviolet (VUV)/chlorine process was proposed as a strategy for UF membrane fouling control and ultraviolet (UV)/chlorine process was used for comparison. VUV/chlorine process exhibited more excellent performance on NOM removal than UV/chlorine process. [HO•]ss and [Cl•]ss were calculated as 1.26 × 10-13 and 3.06 × 10-14 M, respectively, and ClO• might not exist under the conditions of 0.08 mM chlorine and 30 min VUV irradiation. [HO•]ss, [Cl•]ss and [ClO•]ss were not available and the formation of reactive radicals was unsustainable in UV/chlorine system. Moreover, VUV/chlorine pretreatment also showed better performance on the reversible and irreversible membrane fouling control than UV/chlorine pretreatment. The dominated fouling mechanism in the final stage of filtration was cake filtration. Additionally, the amount of detected disinfection by-products (DBPs) in VUV/chlorine system was significantly lower than that in UV/chlorine system. During subsequent chlorination disinfection, the yield of DBPs with VUV/chorine pretreatment was higher than that with UV/chlorine pretreatment. VUV/chlorine pretreatment could effectively control DBPs formation when the pretreatment time was extended to 120 min. In summary, VUV/chlorine system presented a most excellent performance on membrane fouling control, NOM degradation and DBPs control.
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Affiliation(s)
- Shengnan Chen
- College of Environment and Ecology, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Zhiwei Zhao
- College of Environment and Ecology, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China.
| | - Fuyi Cui
- College of Environment and Ecology, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Bingyan Liu
- College of Environment and Ecology, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China
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41
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Neyra JA, Mehta RL, Murugan R. Fluid Management during Continuous Renal Replacement Therapy: A Case-Based Approach. Nephron Clin Pract 2023; 147:782-787. [PMID: 37793364 DOI: 10.1159/000534395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 09/05/2023] [Indexed: 10/06/2023] Open
Abstract
Continuous renal replacement therapy (CRRT) is frequently used for fluid management of critically ill patients with acute or chronic kidney failure. There is significant practice variation worldwide in fluid management during CRRT. Multiple clinical studies have suggested that both the magnitude and duration of fluid overload are associated with morbidity and mortality in critically ill patients. Therefore, timely and effective fluid management with CRRT is paramount in managing critically ill patients with fluid overload. While the optimal method of fluid management during CRRT is still unclear and warrants further investigation, observational data have suggested a U-shape relationship between net ultrafiltration rate and mortality. Furthermore, recent clinical data have underpinned a significant gap in prescribed versus achieved fluid balance during CRRT, which is also associated with mortality. This review uses a case-based approach to discuss two fluid management strategies based on net ultrafiltration rate and fluid balance goals during CRRT and harmonizes operational definitions.
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Affiliation(s)
- Javier A Neyra
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Ravindra L Mehta
- Division of Nephrology, Department of Medicine, University of California San Diego, San Diego, California, USA
| | - Raghavan Murugan
- Program for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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Al-Tayawi AN, Gulyás NS, Gergely G, Fazekas ÁF, Szegedi B, Hodúr C, Lennert JR, Kertész S. Enhancing ultrafiltration performance for dairy wastewater treatment using a 3D printed turbulence promoter. Environ Sci Pollut Res Int 2023; 30:108907-108916. [PMID: 37759054 PMCID: PMC10622354 DOI: 10.1007/s11356-023-30027-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023]
Abstract
Dairy factories annually generate an increasing amount of wastewater, which can cause eutrophication due to high concentrations of amino acids and lipids. To address this issue, membrane technology has emerged as a promising solution, but membrane fouling remains a significant challenge, since it can cause decreased flux, decrease membrane rejection performance, and increased energy demand. This study aimed to reduce membrane fouling by integrated a three-dimensional printed (3DP) turbulence promoter into an ultrafiltration dead-end cell and varying stirring speeds. Two mathematical models, Hermia and resistance-in-series, were used to analyze the fouling process. According to both models, the cake layer formation model indicated the most prevalent fouling mechanism. Specific energy demand, permeate flux, membrane rejection, and membrane reversible and irreversible resistances were measured, calculated, and compared. The results suggest that the combination of an integrated 3DP turbulence promoter and high stirring speeds can effectively reduce membrane fouling in a dairy wastewater treatment module.
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Affiliation(s)
- Aws N Al-Tayawi
- Doctoral School of Environmental Sciences, University of Szeged, Szeged, H-6725, Hungary
- Department of Environmental Technology, Faculty of Environmental Science and Technology, University of Mosul, Mosul, 41002, Iraq
| | - Nikolett Sz Gulyás
- Doctoral School of Environmental Sciences, University of Szeged, Szeged, H-6725, Hungary
- Department of Food Engineering, Faculty of Engineering, University of Szeged, Szeged, H-6725, Hungary
| | - Gréta Gergely
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Szeged, H-6725, Hungary
| | - Ákos Ferenc Fazekas
- Doctoral School of Environmental Sciences, University of Szeged, Szeged, H-6725, Hungary
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Szeged, H-6725, Hungary
| | - Balázs Szegedi
- Department of Mechanical Engineering, Faculty of Engineering, University of Szeged, Szeged, H-6725, Hungary
| | - Cecilia Hodúr
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Szeged, H-6725, Hungary
| | - József Richárd Lennert
- Department of Power Electronics and E-Drives, Audi Hungaria Faculty of Automotive Engineering, Széchenyi István University, Győr, H-9026, Hungary
| | - Szabolcs Kertész
- Department of Biosystems Engineering, Faculty of Engineering, University of Szeged, Szeged, H-6725, Hungary.
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Liu B, Jun Y, Zhao C, Zhou C, Zhu T, Shao S. Using Fe(II)/Fe(VI) activated peracetic acid as pretreatment of ultrafiltration for secondary effluent treatment: Water quality improvement and membrane fouling mitigation. Water Res 2023; 244:120533. [PMID: 37659184 DOI: 10.1016/j.watres.2023.120533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 08/25/2023] [Accepted: 08/26/2023] [Indexed: 09/04/2023]
Abstract
Ultrafiltration (UF) is a technology commonly used to treat secondary effluents in wastewater reuse; however, it faces two main challenges: 1) membrane fouling and 2) inadequate nitrogen (N), phosphorus (P), and organic micropollutants (OMPs) removal. To address these two issues, in this study, we applied peracetic acid (PAA), Fe(VI)/PAA, and Fe(II)/PAA as UF pretreatments. The results showed that the most effective pretreatment was Fe(II)/200 μM PAA, which reduced the total fouling resistance by 90.2%. In comparison, the reduction was only 29.7% with 200 μM PAA alone and 64.3% with Fe(VI)/200 μM PAA. Fe(II)/200 μM PAA could effectively remove fluorescent components and hydrophobic organics in effluent organic matter (EfOM), and enhance the repulsive force between foulants and membrane (according to XDLVO analysis), and consequently, mitigate pore blocking and delay cake layer formation. Regarding pollutant removal, Fe(II)/200 μM PAA effectively degraded OMPs (>85%) and improved P removal by 58.2% via in-situ Fe(Ⅲ) co-precipitation. The quencher and probe experiments indicated that FeIVO2+, •OH, and CH3C(O)OO•/CH3C(O)O• all played important roles in micropollutant degradation with Fe(II)/PAA. Interestingly, PAA oxidation produced highly biodegradable products such as acetic acid, which significantly elevated the BOD5 level and increased the BOD5/total nitrogen (BOD5/TN) ratio from 0.8 to 8.6, benefiting N removal with subsequent denitrification. Overall, the Fe(II)/PAA process exhibits great potential as a UF pretreatment to control membrane fouling and improve water quality during secondary effluent treatment.
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Affiliation(s)
- Bin Liu
- Hunan Engineering Research Center of Water Security Technology and Application, College of Civil Engineering, Hunan University, Changsha 410082, PR China
| | - Yin Jun
- Hunan Engineering Research Center of Water Security Technology and Application, College of Civil Engineering, Hunan University, Changsha 410082, PR China
| | - Changrong Zhao
- Hunan Engineering Research Center of Water Security Technology and Application, College of Civil Engineering, Hunan University, Changsha 410082, PR China
| | - Chu Zhou
- School of Civil Engineering, Wuhan University, Wuhan 430072, PR China
| | - Tingting Zhu
- Hunan Engineering Research Center of Water Security Technology and Application, College of Civil Engineering, Hunan University, Changsha 410082, PR China.
| | - Senlin Shao
- School of Civil Engineering, Wuhan University, Wuhan 430072, PR China.
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Teixeira JP, Zeidman A, Beaubien-Souligny W, Cerdá J, Connor MJ, Eggleston K, Juncos LA, da Silva JR, Wells C, Yessayan L, Barker AB, McConville W, Speer R, Wille KM, Neyra JA, Tolwani A. Proceedings of the 2022 UAB CRRT Academy: Non-Invasive Hemodynamic Monitoring to Guide Fluid Removal with CRRT and Proliferation of Extracorporeal Blood Purification Devices. Blood Purif 2023; 52:857-879. [PMID: 37742622 DOI: 10.1159/000533573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 06/29/2023] [Indexed: 09/26/2023]
Abstract
In 2022, we celebrated the 15th anniversary of the University of Alabama at Birmingham (UAB) Continuous Renal Replacement Therapy (CRRT) Academy, a 2-day conference attended yearly by an international audience of over 100 nephrology, critical care, and multidisciplinary trainees and practitioners. This year, we introduce the proceedings of the UAB CRRT Academy, a yearly review of select emerging topics in the field of critical care nephrology that feature prominently in the conference. First, we review the rapidly evolving field of non-invasive hemodynamic monitoring and its potential to guide fluid removal by renal replacement therapy (RRT). We begin by summarizing the accumulating data associating fluid overload with harm in critical illness and the potential for harm from end-organ hypoperfusion caused by excessive fluid removal with RRT, underscoring the importance of accurate, dynamic assessment of volume status. We describe four applications of point-of-care ultrasound used to identify patients in need of urgent fluid removal or likely to tolerate fluid removal: lung ultrasound, inferior vena cava ultrasound, venous excess ultrasonography, and Doppler of the left ventricular outflow track to estimate stroke volume. We briefly introduce other minimally invasive hemodynamic monitoring technologies before concluding that additional prospective data are urgently needed to adapt these technologies to the specific task of fluid removal by RRT and to learn how best to integrate them into practical fluid-management strategies. Second, we focus on the growth of novel extracorporeal blood purification devices, starting with brief reviews of the inflammatory underpinnings of multiorgan dysfunction and the specific applications of pathogen, endotoxin, and/or cytokine removal and immunomodulation. Finally, we review a series of specific adsorptive technologies, several of which have seen substantial clinical use during the COVID-19 pandemic, describing their mechanisms of target removal, the limited existing data supporting their efficacy, ongoing and future studies, and the need for additional prospective trials.
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Affiliation(s)
- J Pedro Teixeira
- Division of Nephrology and Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Internal Medicine, University of New Mexico, Albuquerque, New Mexico, USA
| | - Amanda Zeidman
- Division of Nephrology, Department of Medicine, Institute for Critical Care Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | - Jorge Cerdá
- Department of Medicine, Nephrology, Albany Medical College, Albany, New York, USA
| | - Michael J Connor
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine and Division of Renal Medicine, Department of Medicine, Emory University, Atlanta, Georgia, USA
| | | | - Luis A Juncos
- Division of Nephrology, Department of Internal Medicine, Central Arkansas Veterans' Healthcare System, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | | | - Catherine Wells
- Division of Nephrology, Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Lenar Yessayan
- Division of Nephrology, Department of Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Andrew B Barker
- Division of Critical Care Medicine, Department of Anesthesiology and Perioperative Medicine, University of Alabama Birmingham, Birmingham, Alabama, USA
| | - Wendy McConville
- School of Nursing, University of Alabama Birmingham, Birmingham, Alabama, USA
| | - Rajesh Speer
- Division of Nephrology, Department of Medicine, University of Alabama Birmingham, Birmingham, Alabama, USA
| | - Keith M Wille
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama Birmingham, Birmingham, Alabama, USA
| | - Javier A Neyra
- Division of Nephrology, Department of Medicine, University of Alabama Birmingham, Birmingham, Alabama, USA
| | - Ashita Tolwani
- Division of Nephrology, Department of Medicine, University of Alabama Birmingham, Birmingham, Alabama, USA
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Meijers B, Vega A, Juillard L, Kawanishi H, Kirsch AH, Maduell F, Massy ZA, Mitra S, Vanholder R, Ronco C, Cozzolino M. Extracorporeal Techniques in Kidney Failure. Blood Purif 2023; 53:343-357. [PMID: 38109873 DOI: 10.1159/000533258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 07/20/2023] [Indexed: 12/20/2023]
Abstract
During the last decades, various strategies have been optimized to enhance clearance of a variable spectrum of retained molecules to ensure hemodynamic tolerance to fluid removal and improve long-term survival in patients affected by kidney failure. Treatment effects are the result of the interaction of individual patient characteristics with device characteristics and treatment prescription. Historically, the nephrology community aimed to provide adequate treatment, along with the best possible quality of life and outcomes. In this article, we analyzed blood purification techniques that have been developed with their different characteristics.
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Affiliation(s)
- Bjorn Meijers
- Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
- Department of Nephrology, UZ Leuven, Leuven, Belgium
| | - Almudena Vega
- Nephrology Department, Hospital Universitario Gregorio Marañón, Madrid, Spain
| | - Laurent Juillard
- Medical School, Claude Bernard University (Lyon 1), Villeurbanne, France
- Department of Nephrology, Edouard Herriot Hospital, Hospices Civils de Lyon, Lyon, France
| | - Hideki Kawanishi
- Department of Kidney Diseases and Blood Purification Therapy, Tsuchiya General Hospital, Hiroshima, Japan
| | | | - Francisco Maduell
- Department of Nephrology, Hospital Clínic Barcelona, Barcelona, Spain
| | - Ziad A Massy
- Service de Néphrologie, CHU Ambroise Paré, Assistance Publique - Hôpitaux de Paris et Université Paris-Saclay (Versailles-Saint-Quentin-en-Yvelines), Boulogne Billancourt, France
- Inserm U-1018 Centre de Recherche en Épidémiologie et Santé des Populations (CESP), Villejuif, France
| | - Sandip Mitra
- Manchester Academy of Health Sciences Centre, Manchester University Hospitals, Manchester, UK
| | - Raymond Vanholder
- Department of Internal Medicine and Pediatrics, Nephrology Section, University Hospital, Ghent, Belgium
- European Kidney Health Alliance, Brussels, Belgium
| | - Claudio Ronco
- Department of Nephrology, Dialysis and Transplantation, International Renal Research Institute of Vicenza (IRRIV), San Bortolo Hospital, Vicenza, Italy
| | - Mario Cozzolino
- Renal Division, Department of Health Sciences, University of Milan, Milan, Italy
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46
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Rodríguez-Álvarez A, Piñeiro-Fernández JC, Guerrero-Sande H, Chaos-González MP, Pérez-López A, González-Tabara L, Millan-Díaz B, Cerqueiro-González JM. Peritoneal ultrafiltration in older adult patients with advanced heart failure. Intern Emerg Med 2023; 18:1665-1671. [PMID: 37261558 DOI: 10.1007/s11739-023-03323-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/22/2023] [Indexed: 06/02/2023]
Abstract
Advanced heart failure (HF) with congestive symptoms refractory to diuretic treatment worsens the patient's prognosis and quality of life. Peritoneal ultrafiltration (PUF) attempts to improve symptoms and reduce HF-related events. This study analyzes the impact of PUF on older adult patients with significant comorbidity and advanced HF. Eighteen patients with advanced HF attended to in the Internal Medicine HF Unit of the Lucus Augusti University Hospital of Lugo, Spain, who started PUF between 2014 and 2021 were analyzed. The number of admissions and instances in which diuretic rescue treatment was used in the year before and after starting PUF were compared. The evolution of renal function, complications secondary to the technique, and survival were also analyzed. The median age was 80 (SD 5.8) years and 72.2% were men. Comparing the year after starting PUF to the year before starting PUF, hospital admissions due to HF (4 vs 20, p = 0.01) and the use of intravenous diuretic rescue treatment declined (4 vs 118, p < 0.001). There was no significant deterioration in renal function during the first year of follow-up or major complications associated with the technique. Survival was 72% at 1 year. In older adult patients with comorbidity, advanced HF, and refractory congestive symptoms, PUF reduced hospital admissions and the use of intravenous diuretic rescue treatment, without major complications.
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Affiliation(s)
- Ana Rodríguez-Álvarez
- Heart Failure Unit, Lucus Augusti University Hospital, SERGAS, 1 Ulises Romero Street, 27003, Lugo, Spain.
| | | | - Héctor Guerrero-Sande
- Heart Failure Unit, Lucus Augusti University Hospital, SERGAS, 1 Ulises Romero Street, 27003, Lugo, Spain
| | - María Pilar Chaos-González
- Heart Failure Unit, Lucus Augusti University Hospital, SERGAS, 1 Ulises Romero Street, 27003, Lugo, Spain
| | - Antía Pérez-López
- Heart Failure Unit, Lucus Augusti University Hospital, SERGAS, 1 Ulises Romero Street, 27003, Lugo, Spain
| | - Lourdes González-Tabara
- Department of Nephrology, Lucus Augusti University Hospital, SERGAS, 1 Ulises Romero Street, 27003, Lugo, Spain
| | - Beatriz Millan-Díaz
- Department of Nephrology, Lucus Augusti University Hospital, SERGAS, 1 Ulises Romero Street, 27003, Lugo, Spain
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Han Y, Wang J, Xu D, Song J, Wang H, Zhu X, Luo X, Yang L, Li G, Liang H. Synergistic effect of potassium ferrate and ferrous iron for improving ultrafiltration performance in algae-laden water treatment. Water Res 2023; 243:120362. [PMID: 37517148 DOI: 10.1016/j.watres.2023.120362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/04/2023] [Accepted: 07/14/2023] [Indexed: 08/01/2023]
Abstract
The application of ultrafiltration (UF) technology in algae-laden water is limited due to the serious membrane fouling caused by algal foulants. Herein, a Ferrate/FeSO4(Fe(VI)/Fe(II)) pretreatment was proposed aiming to improve the performance of UF. The results showed that the synergistic of Fe(VI) and Fe(II) significantly increased the zeta potential of Microcystis aeruginosa, which enhanced the agglomerative tendency of algal foulants, and the particle size of flocs remarkably increased due to the in-situ generated Fe(III). Results from dissolved organic carbon (DOC), UV254, K+, and fluorescent spectra indicated that the introduction of Fe(II) avoided the excessive oxidation of Fe(VI) to algal cells and reduced the production of intracellular organic matter (IOM), while the strong coagulation efficiency of in-situ Fe(III) further enhanced the removal effect of algal organics. Meanwhile, the molecular weight distribution showed that macromolecular organics were decomposed into low molecular matters under Fe(VI) oxidation, while the Fe(VI)/Fe(II) process reduced the formation of small molecular matters compared with single Fe(VI) pretreatment. The algal-source fouling was efficaciously mitigated under the optimal experimental condition, the terminal membrane flux could be increased from 0.16 to 0.62, while reversible and irreversible fouling decreased by 67.1% and 64.1%, respectively. Modeling analysis demonstrated that the Fe(VI)/Fe(II) process altered the fouling mechanism by delaying the formation of cake filtration. Membrane interface characterization further indicated that large size algal flocs form a loose cake layer and reduce the deposition of algal pollutants on the membrane surface. The Extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory confirmed that the hydrophobic adsorption between the algal foulant and the membrane was weakened, thus relieving the membrane fouling. Overall, this strategy can be considered for application in improving the UF performance and mitigating algal-source membrane fouling.
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Affiliation(s)
- Yonghui Han
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jinlong Wang
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Daliang Xu
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jialin Song
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Hesong Wang
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xuewu Zhu
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China
| | - Xinsheng Luo
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China
| | - Liu Yang
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Guibai Li
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Heng Liang
- National Engineering Research Centre for Bioenergy, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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48
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Liu P, Hu J, Wang Q, Tan J, Wei J, Yang H, Tang S, Huang H, Zou Y, Huang Z. Physicochemical characterization and cosmetic application of kelp blanching water polysaccharides. Int J Biol Macromol 2023; 248:125981. [PMID: 37499725 DOI: 10.1016/j.ijbiomac.2023.125981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/18/2023] [Accepted: 07/23/2023] [Indexed: 07/29/2023]
Abstract
Seaweeds account for half of global mariculture and have become a key player in bio-based industries. Seaweed process typically starts with hot water blanching that helps reduce postharvest quality deterioration but also generates large amounts of hydrothermal waste. This study aims to explore the feasibility of isolating water-soluble biopolymers from seaweed hydrothermal waste and their potential applications. Using Saccharina japonica (formerly Laminaria japonica) blanching water as example, 2.9 g/L of polymeric substances were efficiently isolated by ultrafiltration, implying biopolymer coproduction potential of ~5.8 kt from blanching wastewater of current kelp industry. Physicochemical characterizations revealed polysaccharidic nature of the biopolymers, with high contents of fucose, uronic acids and sulfate, showing distinct but also overlapping structural features with hot water-extracted kelp polysaccharides. The main fraction of the blanching water polymers after anion exchange chromatography was acidic polysaccharide, the major backbone residues of which were (1-4) linked mannopyranose, (1-4) linked gulopyranose and (1-2) linked fucopyranose while the branched residues were primarily 1,3,4-, 1,2,4- and 1,4,6-linked hexoses but also 1,3,4-fucopyranose. Furthermore, the polysaccharides were found to have a good compatibility in cosmetic creams with added cohesiveness and freshness, demonstrating the application potential of such natural biopolymers from currently underexplored seaweed blanching water.
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Affiliation(s)
- Peihua Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Guangdong Province Key Laboratory for Biocosmetics, Guangzhou 510641, China
| | - Jingjing Hu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Guangdong Province Key Laboratory for Biocosmetics, Guangzhou 510641, China
| | - Qiangqiang Wang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Guangdong Province Key Laboratory for Biocosmetics, Guangzhou 510641, China
| | - Jianhua Tan
- Guangdong Province Key Laboratory for Biocosmetics, Guangzhou 510641, China; Guangzhou Quality Supervision and Testing Institute, Guangzhou 511447, China
| | - Jian Wei
- Guangdong Province Key Laboratory for Biocosmetics, Guangzhou 510641, China; Guangzhou Quality Supervision and Testing Institute, Guangzhou 511447, China
| | - Hongbo Yang
- Instrumental Analysis Center, Shenzhen University, Shenzhen 518055, China
| | - Shuping Tang
- Guangzhou Siyan Biotechnology Co., Ltd., Guangzhou 510006, China
| | - Hongliang Huang
- School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yongdong Zou
- Instrumental Analysis Center, Shenzhen University, Shenzhen 518055, China.
| | - Zebo Huang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Guangdong Province Key Laboratory for Biocosmetics, Guangzhou 510641, China.
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Davenport A. Calcium balance in peritoneal dialysis patients treated by continuous ambulatory peritoneal dialysis (CAPD) and automated peritoneal dialysis (APD) cyclers. J Nephrol 2023; 36:1867-1876. [PMID: 36862284 PMCID: PMC10543882 DOI: 10.1007/s40620-023-01575-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 12/31/2022] [Indexed: 03/03/2023]
Abstract
INTRODUCTION Although vascular calcification is a recognised complication for haemodialysis patients, peritoneal dialysis (PD) patients are also at risk. As such we wished to review peritoneal and urinary calcium balance and the effect of calcium containing phosphate binders (CCPBs). METHODS Twenty-four-hour peritoneal calcium balance and urinary calcium were reviewed in PD patients undergoing their first assessment of peritoneal membrane function. RESULTS Results from 183 patients, 56.3% male, 30.1% diabetic, mean age 59.4 ± 16.4 years, median 2.0 (2-6) months of PD, 29% treated by automated PD (APD), 26.8% continuous ambulatory (CAPD) and 44.2% APD with a day-time exchange (CCPD) were reviewed. Peritoneal calcium balance was positive in 42.6%, and remained positive in 21.3% after including urinary calcium losses. PD calcium balance was negatively associated with ultrafiltration (odds ratio 0.99 (95% confidence limits 0.98-0.99), p = 0.005. PD calcium balance was lowest with APD (APD - 0.45 (- 0.78 to 0.05) vs CAPD - 0.14 (- 1.18 to 0.59) vs CCPD - 0.03) - 0.48 to 0.5) mmol/day), p < 0.05, with 82.1% of patients with a positive balance prescribed icodextrin, when combining peritoneal and urinary losses. When considering CCPB prescription, then 97.8% of subjects prescribed CCPD had an over-all positive calcium balance. DISCUSSION Over 40% of PD patients had a positive peritoneal calcium balance. Elemental calcium intake from CCPB had a major effect on calcium balance, as median combined peritoneal and urinary calcium losses were < 0.7 mmol/day (26 mg), so caution is required to prevent excessive CCPB prescribing, increasing the exchangeable calcium pool and thus potentially increasing vascular calcification, particularly for anuric patients.
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Affiliation(s)
- Andrew Davenport
- UCL Department of Renal Medicine, Royal Free Hospital, University College London Medical School, London, UK.
- UCL Department of Nephrology, Royal Free Hospital, University College London, Rowland Hill Street, London, NW3 2PF, UK.
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Wu S, Ma B, Fan H, Hua X, Hu C, Ulbricht M, Qu J. Influence of water quality factors on cake layer 3D structures and water channels during ultrafiltration process. Water Res 2023; 242:120226. [PMID: 37364354 DOI: 10.1016/j.watres.2023.120226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/28/2023] [Accepted: 06/12/2023] [Indexed: 06/28/2023]
Abstract
The three-dimensional (3D) structure of the cake layer, which could be influenced by water quality factors, plays a significant role in the ultrafiltration (UF) efficiency of water purification. However, it remains challenging to precisely reveal the variation of cake layer 3D structures and water channel characteristics. Herein, we systematically report the variation in the cake layer 3D structure at the nanoscale induced by key water quality factors and reveal its influence on water transport, in particular the abundance of water channels within the cake layer. In comparison with pH and Na+, Ca2+ played more significant role in determining cake layer structures. The sandwich-like cake layer, which was induced by the asynchronous deposition of humic acids and sodium alginate (SA), shifted to an isotropic structure when Ca2+ was present due to the Ca2+ bridging. In comparison with the sandwich-like structure, the isotropic cake layer has higher fractions of free volume (voids) and more water channels, leading to a 147% improvement in the water transport coefficient, 60% reduction in the cake layer resistance, and 21% increase in the final membrane specific flux. Our work elucidates a structure-property relationship where improving the isotropy of the cake layer 3D structure is conducive to the optimization of water channels and water transport within cake layers. This could inspire tailored regulation strategies for cake layers to enhance the UF efficiency of water purification.
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Affiliation(s)
- Siqi Wu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Baiwen Ma
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen, Essen 45117, Germany.
| | - Hongwei Fan
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xin Hua
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China; School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chengzhi Hu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mathias Ulbricht
- Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen, Essen 45117, Germany
| | - Jiuhui Qu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
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