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Liu J, Yu H, Kong J, Ge X, Sun Y, Mao M, Wang DY, Wang Y. Preparation, characterization, stability, and controlled release of chitosan-coated zein/shellac nanoparticles for the delivery of quercetin. Food Chem 2024; 444:138634. [PMID: 38330608 DOI: 10.1016/j.foodchem.2024.138634] [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: 10/10/2023] [Revised: 01/15/2024] [Accepted: 01/28/2024] [Indexed: 02/10/2024]
Abstract
Quercetin, an essential flavonoid compound, exhibits diverse biological activities including anti-inflammatory and antioxidant effects. Nevertheless, due to its inadequate solubility in water and vulnerability to degradation, pure quercetin is constrainedly utilized in pharmaceutical formulations and functional foods. Considering the existing scarcity of nanoparticles consisted of zein and hydrophobic biopolymers, this study developed a quercetin-loaded nanoencapsulation based on zein, shellac, and chitosan (QZSC). When the mass ratio of zein to chitosan was 4:1, the encapsulation efficiency of QZSC reached 74.95%. The ability of QZSC for scavenging DPPH radicals and ABTS radicals increased from 59.2% to 75.4% and from 47.0% to 70.2%, respectively, compared to Quercetin. For QZSC, the maximum release amount of quercetin reached 59.62% in simulated gastric fluid and 81.64% in simulated intestinal fluid, achieving controlled and regulated release in vitro. In summary, this study offers a highly promising encapsulation strategy for hydrophobic bioactive substances that are prone to instability.
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Affiliation(s)
- Jiawen Liu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, Zhejiang, China; Ningbo Research Institute, Zhejiang University, Ningbo 315100, China
| | - Hongrui Yu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, Zhejiang, China; Ningbo Research Institute, Zhejiang University, Ningbo 315100, China
| | - Jianglong Kong
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, Zhejiang, China; Ningbo Research Institute, Zhejiang University, Ningbo 315100, China
| | - Xiaohan Ge
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, Zhejiang, China; Ningbo Research Institute, Zhejiang University, Ningbo 315100, China
| | - Yuting Sun
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, Zhejiang, China; Ningbo Research Institute, Zhejiang University, Ningbo 315100, China
| | - Meiru Mao
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, Zhejiang, China; Ningbo Research Institute, Zhejiang University, Ningbo 315100, China
| | - David Y Wang
- Hong Kong Baptist University, Hong Kong Special Administrative Region; Hong Kong Baptist University Institute of Research and Continuing Education, Shenzhen Virtual University Park, Shenzhen, 518057, China.
| | - Yi Wang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, Zhejiang, China; Ningbo Research Institute, Zhejiang University, Ningbo 315100, China.
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Cheng WY, Zeng XX, Cheng P, Zhang JX. Loureirin B ameliorates cholestatic liver fibrosis via AKT/mTOR/ATG7-mediated autophagy of hepatic stellate cells. Eur J Pharmacol 2024; 971:176552. [PMID: 38580181 DOI: 10.1016/j.ejphar.2024.176552] [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: 02/21/2024] [Revised: 03/21/2024] [Accepted: 03/28/2024] [Indexed: 04/07/2024]
Abstract
AIM OF THE STUDY Chronic cholestasis leads to liver fibrosis, which lacks effective treatment. In this study, we investigated the role and mechanisms of action of loureirin B (LB) in cholestatic liver fibrosis. MATERIALS AND METHODS Bile duct ligation (BDL)-induced hepatic fibrosis mice were used as in vivo models. Transforming growth factor-β1 (TGF-β1)-pretreated HSC-T6 cells were used to explore the mechanism by which LB attenuates liver fibrosis in vitro. RNA sequencing, quantitative PCR (qPCR), western blotting, immunohistochemistry and immunofluorescence were performed to detect the fibrosis markers and measure autophagy levels. Flow cytometry, cell counting kit-8 (CCK-8) assay, and 5'-ethynyl-2'-deoxyuridine (EdU) assay were conducted to detect cell proliferation and viability. GFP-RFP-LC3 adenovirus, autophagy-related protein 7 (ATG7) siRNA, and bafilomycin A1 (BafA1) were used to verify autophagic flux. RESULTS Our results showed that LB ameliorates liver injury, inhibits collagen deposition, and decreases the expressions of fibrosis-related markers in BDL-induced mouse livers. In vitro, we found that LB inhibited proliferation and migration, promoted apoptosis, and inhibited the activation of HSC-T6 cells pretreated with TGF-β1. RNA sequencing analysis of HSC-T6 cells showed that LB treatment predominantly targeted autophagy-related pathways. Further protein analysis indicated that LB downregulated the expression of phosphorylated AKT (p-AKT) and phosphorylated mTOR (p-mTOR), and upregulated LC3-II, p62, and ATG7 both in vivo and in vitro. Intriguingly, ATG7 inactivation reversed the antifibrotic effects of LB on HSC-T6 cells. CONCLUSIONS LB can improve BDL-induced liver fibrosis by inhibiting the activation and proliferation of HSCs and is expected to be a promising antifibrotic drug.
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Affiliation(s)
- Wei-Yi Cheng
- Department of Emergency General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Xi-Xi Zeng
- Department of Anatomy, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Ping Cheng
- Department of Emergency General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jin-Xiang Zhang
- Department of Emergency General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
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Silva RBV, Coelho Júnior VG, de Paula Mattos Júnior A, Julidori Garcia H, Siqueira Caixeta Nogueira E, Mazzoni TS, Ramos Martins J, Rosatto Moda LM, Barchuk AR. Farnesol, a component of plant-derived honeybee-collected resins, shows JH-like effects in Apis mellifera workers. J Insect Physiol 2024; 154:104627. [PMID: 38373613 DOI: 10.1016/j.jinsphys.2024.104627] [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: 01/30/2024] [Revised: 02/14/2024] [Accepted: 02/14/2024] [Indexed: 02/21/2024]
Abstract
Farnesol, a sesquiterpene found in all eukaryotes, precursor of juvenile hormone (JH) in insects, is involved in signalling, communication, and antimicrobial defence. Farnesol is a compound of floral volatiles, suggesting its importance in pollination and foraging behaviour. Farnesol is found in the resin of Baccharis dracunculifolia, from which honeybees elaborate the most worldwide marketable propolis. Bees use propolis to seal cracks in the walls, reinforce the wax combs, and as protection against bacteria and fungi. The introduction within a honeybee hive of a compound with potential hormonal activity can be a challenge to the colony survival, mainly because the transition from within-hive to outside activities of workers is controlled by JH. Here, we tested the hypothesis that exogenous farnesol alters the pacing of developing workers. The first assays showed that low doses of the JH precursor (0.1 and 0.01 µg) accelerate pharate-adult development, with high doses being toxic. The second assay was conducted in adult workers and demonstrated bees that received 0.2 µg farnesol showed more agitated behaviour than the control bees. If farnesol was used by corpora allata (CA) cells as a precursor of JH and this hormone was responsible for the observed behavioural alterations, these glands were expected to be larger after the treatment. Our results on CA measurements after 72 h of treatment showed bees that received farnesol had glands doubled in size compared to the control bees (p < 0.05). Additionally, we expected the expression of JH synthesis, JH degradation, and JH-response genes would be upregulated in the treated bees. Our results showed that indeed, the mean transcript levels of these genes were higher in the treated bees (significant for methyl farnesoate epoxidase and juvenile hormone esterase, p < 0.05). These results suggest farnesol is used in honeybees as a precursor of JH, leading to increasing JH titres, and thus modulating the pacing of workers development. This finding has behavioural and ecological implications, since alterations in the dynamics of the physiological changes associated to aging in young honeybees may significantly impact colony balance in nature.
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Affiliation(s)
- Raissa Bayker Vieira Silva
- Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, UNIFAL-MG, Alfenas, Minas Gerais, Brazil
| | - Valdeci Geraldo Coelho Júnior
- Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, UNIFAL-MG, Alfenas, Minas Gerais, Brazil
| | - Adolfo de Paula Mattos Júnior
- Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, UNIFAL-MG, Alfenas, Minas Gerais, Brazil
| | - Henrique Julidori Garcia
- Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, UNIFAL-MG, Alfenas, Minas Gerais, Brazil
| | - Ester Siqueira Caixeta Nogueira
- Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, UNIFAL-MG, Alfenas, Minas Gerais, Brazil
| | - Talita Sarah Mazzoni
- Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, UNIFAL-MG, Alfenas, Minas Gerais, Brazil
| | - Juliana Ramos Martins
- Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, UNIFAL-MG, Alfenas, Minas Gerais, Brazil
| | - Lívia Maria Rosatto Moda
- Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, UNIFAL-MG, Alfenas, Minas Gerais, Brazil
| | - Angel Roberto Barchuk
- Departamento de Biologia Celular e do Desenvolvimento, Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, UNIFAL-MG, Alfenas, Minas Gerais, Brazil.
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Geier J, Schubert S, Rieker-Schwienbacher J, Brans R, Weisshaar E, Kränke B, Brockow K, Ruёff F, Recke A, Uter W. Declining frequency of sensitization to fragrance mixes I and II: IVDK-data of the years 2012-2021. Contact Dermatitis 2024; 90:470-478. [PMID: 38146081 DOI: 10.1111/cod.14493] [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: 08/18/2023] [Revised: 12/08/2023] [Accepted: 12/11/2023] [Indexed: 12/27/2023]
Abstract
BACKGROUND EU Commission Regulation 2017/1410 prohibits using atranol and chloroatranol, the main allergens in Evernia prunastri (oakmoss), and hydroxyisohexyl 3-cyclohexene carboxaldehyde (HICC) in cosmetic products. Oakmoss absolute is contained in fragrance mix (FM) I and HICC in FM II which are patch tested as screening mixtures in the baseline series. OBJECTIVE To describe the time trends of reaction frequencies to both FMs as well as to their components in FM-positive patients. METHODS Retrospective analysis of data from the Information Network of Departments of Dermatology (IVDK), 2012-2021. RESULTS Positive reactions to FM I (FM II) declined from 9.1% (4.7%) in 2012 to 4.6% (3.0%) in 2021. Full breakdown tests were performed in 24% (FM I) and 31% (FM II), respectively, of the mix-positive patients. From this data, frequencies of sensitization to the 14 single fragrances of FM I and FM II were calculated. For the majority, a decline was noted from 2012/2013 to 2020/2021, for oakmoss absolute 1.9%-0.8% and for HICC 1.8%-0.9%. CONCLUSION EU Commission Regulation 2017/1410 was an effective measure. However, our data have some limitations, possibly causing underestimation of sensitization frequencies to fragrances.
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Affiliation(s)
- Johannes Geier
- Information Network of Departments of Dermatology (IVDK), Institute at the University Medical Center Göttingen, Göttingen, Germany
| | - Steffen Schubert
- Information Network of Departments of Dermatology (IVDK), Institute at the University Medical Center Göttingen, Göttingen, Germany
| | | | - Richard Brans
- Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) at the Osnabrück University, Osnabrück, Germany
- Department of Dermatology, Environmental Medicine and Health Theory, Osnabrück University, Osnabrück, Germany
| | - Elke Weisshaar
- Unit for Occupational Dermatology, Department of Dermatology, Ruprecht-Karls University Heidelberg, Heidelberg, Germany
| | - Birger Kränke
- Department of Dermatology and Venereology, Medical University of Graz, Graz, Austria
| | - Knut Brockow
- Department of Dermatology and Allergology, Technical University Munich, Munich, Germany
| | - Franziska Ruёff
- Department of Dermatology and Allergy, LMU University Hospital, LMU Munich, Munich, Germany
| | - Andreas Recke
- Department of Dermatology, Allergology and Venereology, University of Luebeck, Luebeck, Germany
| | - Wolfgang Uter
- Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen/Nürnberg, Erlangen, Germany
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Hou M, Lin C, Ma Y, Shi J, Liu J, Zhu L, Bian Z. One-step enrichment of phenolics from Chaenomeles speciosa (Sweet) Nakai fruit using macroporous resin: Adsorption/desorption characteristics, process optimization and UPLC-QqQ-MS/MS-based quantification. Food Chem 2024; 439:138085. [PMID: 38039612 DOI: 10.1016/j.foodchem.2023.138085] [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: 08/28/2023] [Revised: 11/07/2023] [Accepted: 11/25/2023] [Indexed: 12/03/2023]
Abstract
Chaenomeles speciosa (Sweet) Nakai fruit is a good source of phenolics with many health benefits. In this work, the enrichment of C. speciosa fruit total phenolics (CSFTP) using macroporous resins was studied. NKA-Ⅱ resin was selected for enriching CSFTP due to its highest adsorption/desorption quantity. Adsorption characteristics of CSFTP on NKA-Ⅱ resin exhibited a good fit with the Langmuir isotherm model and pseudo-second order kinetics model. This adsorption was spontaneous, exothermic, and entropy-decreasing through a physisorption mechanism. The breakthrough-elution curves were studied to optimize CSFTP enrichment conditions. One-step enrichment increased CSFTP content in the extracts from 26.51 % to 78.63 %, with a recovery of 81.03 %. A UPLC-QqQ-MS/MS method in multiple reaction monitoring (MRM) mode was established and validated for the simultaneous quantification of seven phenolic compounds. This study demonstrates the feasibility of industrial enrichment of CSFTP using NKA-Ⅱ resin and proposes a reliable method for quality control of CSFTP-rich products.
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Affiliation(s)
- Mengyang Hou
- Centre for Chinese Herbal Medicine Drug Development, Hong Kong Baptist University, Hong Kong 999077, China
| | - Chengyuan Lin
- Centre for Chinese Herbal Medicine Drug Development, Hong Kong Baptist University, Hong Kong 999077, China
| | - Yanhua Ma
- Centre for Chinese Herbal Medicine Drug Development, Hong Kong Baptist University, Hong Kong 999077, China
| | - Jingchun Shi
- Centre for Chinese Herbal Medicine Drug Development, Hong Kong Baptist University, Hong Kong 999077, China
| | - Jie Liu
- Centre for Chinese Herbal Medicine Drug Development, Hong Kong Baptist University, Hong Kong 999077, China
| | - Lin Zhu
- Centre for Chinese Herbal Medicine Drug Development, Hong Kong Baptist University, Hong Kong 999077, China; School of Chinese Medicine, Hong Kong Baptist University, Hong Kong 999077, China.
| | - Zhaoxiang Bian
- Centre for Chinese Herbal Medicine Drug Development, Hong Kong Baptist University, Hong Kong 999077, China; School of Chinese Medicine, Hong Kong Baptist University, Hong Kong 999077, China.
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Feng C, Hu C, Sun Z, Zhang H, Xu Z. Experimental study on the effect of Coumarone resin on the performance of SBS-modified asphalt. PLoS One 2024; 19:e0301528. [PMID: 38635694 PMCID: PMC11025964 DOI: 10.1371/journal.pone.0301528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 03/18/2024] [Indexed: 04/20/2024] Open
Abstract
An inexpensive and high-performing solid Coumarone resin was added to Styrene-butadiene-styrene (SBS) copolymer-modified asphalt to enhance its storage stability and road performance. To assess the effect of Coumarone resin dosage on the SBS-modified asphalt, a series of laboratory tests were conducted. The composite modified asphalt's segregation test was used to evaluate its storage stability, Dynamic Shear Rheometer (DSR) and Multiple Stress Creep Recovery (MSCR) tests were employed to investigate its high-temperature performance and permanent deformation resistance, and the Bending Beam Rheology (BBR) test was utilized to measure its low-temperature performance. Fluorescence microscopy was used to observe the composite modified asphalt's microstructure, and Fourier Transform Infrared Spectroscopy (FTIR) was conducted to study the changes in chemical structure during the modification process. The results showed that Coumarone resin can improve the compatibility of SBS and asphalt, improve the high-temperature performance and deformation resistance of SBS-modified asphalt, and adding an appropriate amount of Coumarone resin can help enhance the low-temperature cracking resistance of modified asphalt. The optimal dosage of Coumarone resin recommended for SBS-modified asphalt performance enhancement is 2% under the test conditions, as determined by comparing the test results of samples with various dosages.
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Affiliation(s)
- Chenyu Feng
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, China
| | - Chunhua Hu
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, China
- Key Laboratory of Intelligent Health Perception and Ecological Restoration of Rivers and Lakes, Ministry of Education, Hubei University of Technology, Wuhan, China
| | - Zhaobin Sun
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, China
| | - Hao Zhang
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, China
| | - Zhaozhao Xu
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, China
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Luo Q, Liu S, He Y, Liu J, Zhang X, Zheng L, Huang D. An Evaluation of the Impact of 60Co Irradiation on Volatile Organic Compounds of Olibanum Using Gas Chromatography Ion Mobility Spectrometry. Molecules 2024; 29:1671. [PMID: 38611949 PMCID: PMC11013206 DOI: 10.3390/molecules29071671] [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: 02/08/2024] [Revised: 03/27/2024] [Accepted: 03/31/2024] [Indexed: 04/14/2024] Open
Abstract
Olibanum is a resinous traditional Chinese medicine that is directly used as a powder. It is widely used in China and is often combined with other traditional Chinese medicine powders to promote blood circulation and relieve pain, as well as to treat rheumatism, rheumatoid arthritis, and osteoarthritis. Powdered traditional Chinese medicine is often easily contaminated by microorganisms and 60Co irradiation is one of the good sterilization methods. Volatile organic compounds (VOCs) are the main active ingredient of olibanum. The aim of this study was to validate the optimum doses of 60Co irradiation and its effect on VOCs. 60Co irradiation was applied in different doses of 0 kGy, 1.5 kGy, 3.0 kGy, and 6.0 kGy. Changes in VOCs were detected using gas chromatography ion mobility spectrometry. A total of 81 VOCs were identified. The odor fingerprint results showed that, with an increase in irradiation dose, most of the VOCs of olibanum changed. Through principal component analysis, cluster analysis, and partial least squares discriminant analysis, it was demonstrated that, at 1.5 kGy, the impact of radiation on the VOCs of olibanum was minimal, indicating this is a relatively good irradiation dose. This study provides a theoretical basis for the irradiation processing and quality control of resinous medicinal materials such as olibanum and it also provides a good reference for irradiation technology development and its application to functional foods, thus making it both significant from a research perspective and useful from an application perspective.
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Affiliation(s)
- Qiao Luo
- The First Hospital of Hunan University of Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410007, China;
- State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan (Incubation), Science and Technology Innovation Center, Hunan University of Chinese Medicine, Changsha 410208, China; (S.L.); (Y.H.); (J.L.); (X.Z.); (L.Z.)
| | - Shanshuo Liu
- State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan (Incubation), Science and Technology Innovation Center, Hunan University of Chinese Medicine, Changsha 410208, China; (S.L.); (Y.H.); (J.L.); (X.Z.); (L.Z.)
| | - Ye He
- State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan (Incubation), Science and Technology Innovation Center, Hunan University of Chinese Medicine, Changsha 410208, China; (S.L.); (Y.H.); (J.L.); (X.Z.); (L.Z.)
| | - Jiayao Liu
- State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan (Incubation), Science and Technology Innovation Center, Hunan University of Chinese Medicine, Changsha 410208, China; (S.L.); (Y.H.); (J.L.); (X.Z.); (L.Z.)
| | - Xinyu Zhang
- State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan (Incubation), Science and Technology Innovation Center, Hunan University of Chinese Medicine, Changsha 410208, China; (S.L.); (Y.H.); (J.L.); (X.Z.); (L.Z.)
| | - Liqiu Zheng
- State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan (Incubation), Science and Technology Innovation Center, Hunan University of Chinese Medicine, Changsha 410208, China; (S.L.); (Y.H.); (J.L.); (X.Z.); (L.Z.)
| | - Dan Huang
- State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan (Incubation), Science and Technology Innovation Center, Hunan University of Chinese Medicine, Changsha 410208, China; (S.L.); (Y.H.); (J.L.); (X.Z.); (L.Z.)
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8
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Erol T, Özaltun DH, Çavuşoğlu FC, Acar I, Güçlü G. The effect of linseed oil/canola oil blend on the coating and thermal properties of waste PET-based alkyd resins. AN ACAD BRAS CIENC 2024; 96:e20230859. [PMID: 38597501 DOI: 10.1590/0001-3765202420230859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 12/02/2023] [Indexed: 04/11/2024] Open
Abstract
This study aims to prepare oil-modified alkyd resins using a linseed oil/canola oil (LO/CO) blend and waste PET depolymerization product, suitable for environmentally friendly coating applications. Waste PET flakes obtained from grinding post-consumer water bottles were depolymerized by the aminoglycolysis reaction at high pressure. Raw depolymerization product (DP) was used in the synthesis of four components, 50% oil alkyd resins by monoglyceride method. DP has partly replaced the dibasic acid component in the PET-based alkyd formulations. Besides PET-based alkyds, reference alkyds without DP were also synthesized for comparison. Then, the surface coating properties and thermal behaviors of alkyd films were determined. The effect of DP usage and the changing ratios of LO/CO blend on coating properties and thermal behaviors of alkyd films were investigated. In addition, the optimum LO/CO blend ratio which is compatible with alkyd formulation was attempted to be determined. At the end of this study, glossy, soft/medium-hard films were obtained with excellent adhesion, impact strength, and chemical resistance. Thermal resistance and final thermal oxidative degradation temperature increased with adding DP to the alkyd formulation. Using LO/CO blend in the formulations affected oxidation rate and ratio, hence, drying time/degree and oxidative stability of alkyd films.
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Affiliation(s)
- Tuğba Erol
- Department of Chemical Engineering, Faculty of Engineering, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, 34320, Turkey
| | - Demet H Özaltun
- Department of Chemical Engineering, Faculty of Engineering and Architecture, Ahi Evran University, Kırşehir, 40100, Turkey
| | - Ferda Civan Çavuşoğlu
- Department of Chemical Engineering, Faculty of Engineering and Architecture, Beykent University, Sarıyer, Istanbul, 34396, Turkey
| | - Işil Acar
- Department of Chemical Engineering, Faculty of Engineering, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, 34320, Turkey
| | - Gamze Güçlü
- Department of Chemical Engineering, Faculty of Engineering, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, 34320, Turkey
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9
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Koch TJ, Saurel M, Bocquillon H, Pisani DF, Bonnabel L, Little A, Stacey R, Rageot M, Regert M. Differences in birch tar composition are explained by adhesive function in the central European Iron Age. PLoS One 2024; 19:e0301103. [PMID: 38568980 PMCID: PMC10990240 DOI: 10.1371/journal.pone.0301103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 03/11/2024] [Indexed: 04/05/2024] Open
Abstract
Birch bark tar is the most widely documented adhesive in prehistoric Europe. More recent periods attest to a diversification in terms of the materials used as adhesives and their application. Some studies have shown that conifer resins and beeswax were added to produce compound adhesives. For the Iron Age, no comparative large-scale studies have been conducted to provide a wider perspective on adhesive technologies. To address this issue, we identify adhesive substances from the Iron Age in north-eastern France. We applied organic residue analysis to 65 samples from 16 archaeological sites. This included residues adhering to ceramics, from vessel surface coatings, repaired ceramics, vessel contents, and adhesive lumps. Our findings show that, even during the Iron Age in north-eastern France, birch bark tar is one of the best-preserved adhesive substances, used for at least 400 years. To a lesser extent, Pinaceae resin and beeswax were also identified. Through statistical analyses, we show that molecular composition differs in samples, correlating with adhesive function. This has implications for our understanding of birch bark tar production, processing and mode of use during the Iron Age in France and beyond.
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Affiliation(s)
- Tabea J. Koch
- Université Côte d’Azur, CEPAM, CNRS, Nice, France
- YEAR Centre, PalaeoHub, Department of Archaeology, University of York, York, United Kingdom
| | - Marion Saurel
- Inrap, Grand Est Nord, UMR 8546 AOROC, Châlons-en-Champagne, France
| | - Hervé Bocquillon
- Inrap, Grand Est Nord, UMR 8546 AOROC, Châlons-en-Champagne, France
| | | | - Lola Bonnabel
- Inrap, Midi-Méditerranée, UMR 8215 Trajectoires, Nîmes, France
| | - Aimée Little
- YEAR Centre, PalaeoHub, Department of Archaeology, University of York, York, United Kingdom
| | - Rebecca Stacey
- Department of Scientific Research, British Museum, London, United Kingdom
| | - Maxime Rageot
- Department of Pre- and Protohistory, Eberhard Karls University of Tübingen, Tübingen, Germany
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10
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Zhang T, Tan J, Li S. Functional cellulose-derived epoxy cross-linked with BADGE resin to construct high-performance epoxy composites. Int J Biol Macromol 2024; 265:130569. [PMID: 38553394 DOI: 10.1016/j.ijbiomac.2024.130569] [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: 01/02/2024] [Revised: 02/22/2024] [Accepted: 02/29/2024] [Indexed: 04/18/2024]
Abstract
The development of equipped bio-based epoxy materials has been gaining much attention recently. Nevertheless, finding the balance between the structure and properties of materials remains a significant challenge. In this work, cellulose-based epoxy (PHPCEP) with "soft" and "hard" cooperative structures was designed and demonstrated to endow bisphenol A diglycidyl ether (BADGE) with excellent toughness, heat resistance, mechanical strength, glass transition temperature, thermal stability, and solvent resistance. When 5 wt% PHPCEP was incorporated into BADGE composites, the resulting materials exhibited the maximum flexural strength (121.9 MPa) and tensile strength (71.4 MPa), a high glass transition temperature (148.3 °C), and 10 wt% PHPCEP/BADGE demonstrated the highest impact strength (70.5 kJ/m2). These figures are 18.8 %, 16.1 %, 21.5 %, and 254.3 % higher than the corresponding values of neat BADGE. The results of dynamic mechanical properties and heat degradation of the cured specimens also suggest that PHPCEP/BADGE materials have superior stiffness and toughness than neat BADGE, which could be attributed to the strong interaction between PHPCEP and BADGE, delivering better thermal stability for the composites compared to the pristine resin. Considering the remarkable effect, this work provides an effective way of highly efficient utilization of abundant cellulose and a high-performance additive for composite materials.
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Affiliation(s)
- Tongtong Zhang
- School of Chemistry & Materials Engineering Fuyang Normal University, Fuyang, Anhui 236037, PR China.
| | - Jihuai Tan
- College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Shaochuan Li
- School of Chemistry & Materials Engineering Fuyang Normal University, Fuyang, Anhui 236037, PR China
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11
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Koçak E, Akkoyun Kurtlu M. Impact of production methods on properties of natural rosin added polylactic acid/sodium pentaborate and polylactic acid/calcium carbonate films. Int J Biol Macromol 2024; 265:130965. [PMID: 38503375 DOI: 10.1016/j.ijbiomac.2024.130965] [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: 10/25/2023] [Revised: 03/13/2024] [Accepted: 03/15/2024] [Indexed: 03/21/2024]
Abstract
Nowadays biopolymers play an important role in packaging materials due to their protection properties against physical and chemical degradation or mechanical resistance. In this study, sodium pentaborate anhydride (B5NaO8), eggshell (CaCO3) nanoparticles, and natural rosin additives were introduced to pure PLA to produce a biofilm protecting from UV rays. The impact of the preparation method of hybrid biocomposite films was carried out based on the polymer casting method and using in the first case only magnetic mixing whereas magnetic mixing coupled with ultrasonic homogenizer was used in the second case. All biocomposite films were obtained for a nanoparticle content fixed at 7.5 wt% and various rosin rates (1, 5, 10, and 40 wt%). This study aims to expand the UV protection zone in PLA films. The thermal and mechanical properties, transmittance of UV-visible rays, microstructure analysis, and contact angle values were evaluated to detect the effect of the preparation method on the final properties. The results showed that the homogeneous distribution of the particles was more effective using an ultrasonic homogenizer. The increase of the rosin amount exhibited a reduction of the UV-visible light transmittance and the wettability was observed, demonstrating a potential use of these films in packaging.
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Affiliation(s)
- Esin Koçak
- Bursa Technical University, Department of Polymer Materials Engineering, 16310 Bursa, Turkey
| | - Meral Akkoyun Kurtlu
- Bursa Technical University, Department of Polymer Materials Engineering, 16310 Bursa, Turkey.
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12
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Balasubramanian B, Raja K, Vignesh Kumar V, Ganeshan P. Characterization study of Holoptelea integrifolia tree bark fibres reinforced epoxy composites. Nat Prod Res 2024; 38:1197-1206. [PMID: 36318867 DOI: 10.1080/14786419.2022.2137505] [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: 04/23/2022] [Revised: 10/03/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
This study characterised the composite plate fabricated by epoxy matrix reinforced with alkaline-treated Holoptelea integrifolia tree bark fibre. Tensile and flexural test results clearly show that the mechanical characteristics of pure resin improve in direct proportion to the fibre up to 40%. However, impact test results show that 30% fibre mass ratio composite showed higher mechanical properties. The H. integrifolia fibre composites (HIFC) specimens were also characterised by using Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), Energy dispersive X-ray analysis (EDAX) and thermogravimetric analysis-differential scanning calorimetry (TGA-DSC) analysis. FESEM results show that the bonding between fibre and matrix was excellent. EDAX reveals the elemental proportion of HIFC. O-H, C- H, C-O-C, moisture content and aromatic structure are evident by FTIR spectroscopy. Thermal analysis reveals that the composites degrade rapidly when exposed above 210 °C.
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Affiliation(s)
- B Balasubramanian
- Department of Mechanical Engineering, Chettinad College of Engineering and Technology, Karur, Tamilnadu, India
| | - K Raja
- Department of Mechanical Engineering, University College of Engineering, Dindigul, Tamilnadu, India
| | - V Vignesh Kumar
- Department of Mechanical Engineering, St. Joseph College of Engineering, Chennai, Tamilnadu, India
| | - P Ganeshan
- Department of Mechanical Engineering, Sri Eshwar College of Engineering, Coimbatore, Tamilnadu, India
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13
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Li SF, Hu TG, Jin YB, Wu H. Fabrication and characterization of shellac nanofibers with colon-targeted delivery of quercetin and its anticancer activity. Int J Biol Macromol 2024; 265:130789. [PMID: 38479668 DOI: 10.1016/j.ijbiomac.2024.130789] [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: 01/02/2024] [Revised: 02/06/2024] [Accepted: 03/09/2024] [Indexed: 03/23/2024]
Abstract
In this study, the feasibility of shellac nanofibers as carrier system for colonic delivery of quercetin was evaluated. Firstly, the nanofibers without and with different amounts (2.5 %, 5.0 %, and 7.5 %) of quercetin were fabricated using pure shellac as a carrier by electrospinning. The morphology of nanofibers was bead-shape confirmed by SEM. FTIR, XRD, and DSC analysis showed that quercetin was encapsulated into shellac nanofibers, forming an amorphous complex. The molecular docking simulation indicated quercetin bound well to shellac through hydrogen bonding and van der Waals forces. These nanofibers had higher thermal stability than pure quercetin, and their surface wettability exhibited a pH-responsive behavior. The loading capacity of quercetin varied from 2.25 % to 6.84 % with the increased amount of quercetin, and it affected the stability of nanofibers in food simulants by measuring the release profiles of quercetin. The shellac nanofibers had high gastrointestinal stability, with a minimum quercetin release of 16.87 % in simulated digestive fluids, while the remaining quercetin was delivered to the colon and was released gradually. Moreover, the nanofibers exerted enhanced anticancer activity against HCT-116 cells by arresting cell cycle in G0/G1 phase and inducing cell apoptosis. Overall, shellac nanofibers are promising materials for colon-targeted delivery of active compounds.
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Affiliation(s)
- Shu-Fang Li
- School of Food Science and Engineering, South China University of Technology, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510641, China
| | - Teng-Gen Hu
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510640, China
| | - Yuan-Bao Jin
- Ji'an College, Modern Agriculture and Forestry Engineering College, Jian 343000, China.
| | - Hong Wu
- School of Food Science and Engineering, South China University of Technology, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510641, China.
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14
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Eshaghi R, Mohsenzadeh M, Ayala-Zavala JF. Bio-nanocomposite active packaging films based on carboxymethyl cellulose, myrrh gum, TiO 2 nanoparticles and dill essential oil for preserving fresh-fish (Cyprinus carpio) meat quality. Int J Biol Macromol 2024; 263:129991. [PMID: 38331078 DOI: 10.1016/j.ijbiomac.2024.129991] [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: 02/25/2023] [Revised: 02/02/2024] [Accepted: 02/03/2024] [Indexed: 02/10/2024]
Abstract
This study developed a composite film for packaging refrigerated common carp fillets using carboxymethyl cellulose (CMC) (1.5 % w/v)/Myrrh gum (MG) (0.25 % w/v) base with the addition of titanium dioxide nanoparticles (TiO2 NPs) (0.25 %, 0.5 %, and 1 %) and Dill essential oil (DEO) (1.5 %, 2.25 %, and 3 %). The film was produced using a casting method and optimized for mechanical and barrier properties. The incorporation of DEO and TiO2 NPs into CMC/MG composite films significantly reduced moisture content (MC) and water vapor permeability (WVP), improved their tensile strength (TS), and increased their antimicrobial and antioxidant properties. Moreover, MG can improve the physicomechanical properties of the CMC/MG composite films. The film components had good compatibility without significant aggregation or cracks. In conclusion, the optimized CMC/MG (1.5 %/0.25 %) film containing TiO2 NPs (0.5 %), and DEO (2.25 %) has the best overall performance and can be a good source for making edible film. Functionally, this bioactive nanocomposite film significantly increased the shelf life of refrigerated fish fillet samples for 12 days by inhibiting microbial growth and reducing the oxidation rate compared to the control sample. The knowledge obtained from this study can guide the development of bio-nanocomposite and biodegradable food packaging films based on CMC/MG to increase the shelf life of food products and environmental protection.
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Affiliation(s)
- Reza Eshaghi
- Department of Food Hygiene and Aquaculture, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mohammad Mohsenzadeh
- Department of Food Hygiene and Aquaculture, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.
| | - Jesús Fernando Ayala-Zavala
- Coordinación de Tecnología de Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo, A.C., Carr. Gustavo E. Astiazarán Rosas No. 46, Col. La Victoria, C.P. 83304 Hermosillo, Sonora, Mexico
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15
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Noki S, de la Torre BG, Albericio F. Safety-Catch Linkers for Solid-Phase Peptide Synthesis. Molecules 2024; 29:1429. [PMID: 38611709 PMCID: PMC11012524 DOI: 10.3390/molecules29071429] [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: 02/27/2024] [Revised: 03/18/2024] [Accepted: 03/20/2024] [Indexed: 04/14/2024] Open
Abstract
Solid-phase peptide synthesis (SPPS) is the preferred strategy for synthesizing most peptides for research purposes and on a multi-kilogram scale. One key to the success of SPPS is the continual evolution and improvement of the original method proposed by Merrifield. Over the years, this approach has been enhanced with the introduction of new solid supports, protecting groups for amino acids, coupling reagents, and other tools. One of these improvements is the use of the so-called "safety-catch" linkers/resins. The linker is understood as the moiety that links the peptide to the solid support and protects the C-terminal carboxylic group. The "safety-catch" concept relies on linkers that are totally stable under the conditions needed for both α-amino and side-chain deprotection that, at the end of synthesis, can be made labile to one of those conditions by a simple chemical reaction (e.g., an alkylation). This unique characteristic enables the simultaneous use of two primary protecting strategies: tert-butoxycarbonyl (Boc) and fluorenylmethoxycarbonyl (Fmoc). Ultimately, at the end of synthesis, either acids (which are incompatible with Boc) or bases (which are incompatible with Fmoc) can be employed to cleave the peptide from the resin. This review focuses on the most significant "safety-catch" linkers.
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Affiliation(s)
- Sikabwe Noki
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Westville, Durban 4000, South Africa;
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4041, South Africa
| | - Beatriz G. de la Torre
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4041, South Africa
| | - Fernando Albericio
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Westville, Durban 4000, South Africa;
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials, and Nanomedicine, Department of Organic Chemistry, University of Barcelona, 08028 Barcelona, Spain
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16
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Vinola SM, Mahalaxmi S. Characterisation and evaluation of physical properties of AH-Plus sealer with and without the incorporation of petasin, pachymic acid, curcumin and shilajit-an invitro study. BMC Oral Health 2024; 24:352. [PMID: 38504287 PMCID: PMC10949824 DOI: 10.1186/s12903-024-04108-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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 03/05/2024] [Indexed: 03/21/2024] Open
Abstract
BACKGROUND AH Plus, an epoxy resin-based sealer, is widely used in endodontic practice, owing to its good physical properties that confers longstanding dimensional stability and good adhesion to dentin. Nevertheless, its propensity to trigger inflammation, especially in its freshly mixed state, has been extensively documented. Phytochemicals such as Petasin, Pachymic acid, Curcumin, and Shilajit are known for their anti-inflammatory and analgesic effects. This study aimed to analyze and determine the effect of these natural products on the physical properties of AH Plus sealer when incorporated with the sealer. METHODS AH Plus (AHR) sealer was mixed with 10% petasin, 0.75% pachymic, 0.5% and 6%shilajit to obtain AHP, AHA, AHC and AHS in the ratio of 10:1 and 5:1 respectively. Five samples of each material were assessed for setting time, solubility, flow, and dimensional stability in accordance with the ISO 6876:2012 standardization. Sealers were characterized through scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy, X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy. Statistical evaluation involved the Kolmogorov-Smirnov and Shapiro-Wilks tests for normality and the one-way ANOVA test for analysis. RESULTS In this investigation, the characterisation analysis revealed a relatively similar microstructure in all the experimental root canal sealers. All experimental groups, excluding the control group, exhibited an increase in flow ranging from 11.9 to 31.4% at a 10:1 ratio. Similarly, for the 5:1 ratio, the increase ranged from 12.02 to 31.83%. In terms of dimensional stability, all groups at the 10:1 ratio showed a decrease compared to the control group. The addition of natural agents to AHR in 10:1 ratio led to a reduction in setting time by 8.9-31.6%, and at a 5:1 ratio, the reduction ranged from 8.1 to 31.5%. However, regarding solubility, the addition of natural agents did not induce any significant alterations. CONCLUSION Based on the results of this study, it can be concluded that all tested root canal sealers exhibited properties that met the acceptable criteria outlined in the ISO 6876:2012 standardization.
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Affiliation(s)
- Selvanathan Mj Vinola
- Department of Conservative Dentistry and Endodontics, SRM Dental College, Bharathi Salai, Chennai, Tamil Nadu, 600089, India
| | - Sekar Mahalaxmi
- Department of Conservative Dentistry and Endodontics, SRM Dental College, Bharathi Salai, Chennai, Tamil Nadu, 600089, India.
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17
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Xu R, Han X, Lou Y, Chang M, Kong Y, Gu S, Gao Y, Shang S, Song Z, Song J, Li J. Discovery of Potential Rosin-Based Triazole Antifungal Candidates to Control Valsa mali for Sustainable Crop Protection. J Agric Food Chem 2024; 72:4630-4638. [PMID: 38407939 DOI: 10.1021/acs.jafc.3c07628] [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] [Indexed: 02/27/2024]
Abstract
To investigate the potential application value of dehydroabietic acid, 27 novel dehydroabietyl-1,2,4-triazole-5-thioether-based derivatives were designed and characterized by IR, 1H NMR, 13C NMR, and LC-MS. Their antifungal activities were evaluated against five plant fungi, namely, Valsa mali, Colletotrichum orbiculare, Fusarium graminearum, Sclerotinia sclerotiorum, and Gaeumannomyces graminis; the results showed that compound 5h-1 (Co. 5h-1) exhibited a considerable inhibitory effect against V. mali. Moreover, in vivo experiments indicated that Co. 5h-1 had a certain protective effect on apple branches. The preliminary structure-activity relationship analysis suggested that the electron-withdrawing group on the benzyl group was significantly better than that of other substituent derivatives. Through electron microscopy analysis, it was found that Co. 5h-1 hindered the growth of mycelia, damaged their cell structure, and caused the large accumulation of reactive oxygen species (ROS). Preliminary research on the mode of action indicated that Co. 5h-1 could affect the activity of CAT by increasing the α-helix (0.790%), decreasing the β-sheet (0.170%), which led to the accumulation of ROS. In addition, Co. 5h-1 also affected the activity of CYP51, hindered the biosynthesis of ergosterol, and increased cell membrane permeability. Overall, this above research proposed that Co. 5h-1 can be a novel leading structure for development of a fungicide agent.
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Affiliation(s)
- Renle Xu
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Xu Han
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Yuhang Lou
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Meiyue Chang
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Yue Kong
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Shihao Gu
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Yanqing Gao
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Shibin Shang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu 210042, People's Republic of China
| | - Zhanqian Song
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu 210042, People's Republic of China
| | - Jie Song
- Department of Chemistry and Biochemistry, University of Michigan-Flint, Flint, Michigan 48502, United States
| | - Jian Li
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
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18
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Takahashi T, Zhang H, Agetsuma M, Nabekura J, Otomo K, Okamura Y, Nemoto T. Large-scale cranial window for in vivo mouse brain imaging utilizing fluoropolymer nanosheet and light-curable resin. Commun Biol 2024; 7:232. [PMID: 38438546 PMCID: PMC10912766 DOI: 10.1038/s42003-024-05865-8] [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: 03/19/2023] [Accepted: 01/26/2024] [Indexed: 03/06/2024] Open
Abstract
Two-photon microscopy enables in vivo imaging of neuronal activity in mammalian brains at high resolution. However, two-photon imaging tools for stable, long-term, and simultaneous study of multiple brain regions in same mice are lacking. Here, we propose a method to create large cranial windows covering such as the whole parietal cortex and cerebellum in mice using fluoropolymer nanosheets covered with light-curable resin (termed the 'Nanosheet Incorporated into light-curable REsin' or NIRE method). NIRE method can produce cranial windows conforming the curved cortical and cerebellar surfaces, without motion artifacts in awake mice, and maintain transparency for >5 months. In addition, we demonstrate that NIRE method can be used for in vivo two-photon imaging of neuronal ensembles, individual neurons and subcellular structures such as dendritic spines. The NIRE method can facilitate in vivo large-scale analysis of heretofore inaccessible neural processes, such as the neuroplastic changes associated with maturation, learning and neural pathogenesis.
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Affiliation(s)
- Taiga Takahashi
- Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- Department of Medical and Robotic Engineering Design, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo, 125-8585, Japan
| | - Hong Zhang
- Micro/Nano Technology Center, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa, 259-1292, Japan
- School of Chemical Engineering and Technology, Tianjin University, 135 Yaguan Road, Jinnan District, Tianjin, 300350, China
| | - Masakazu Agetsuma
- Division of Homeostatic Development, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, 444-8585, Japan
- Quantum Regenerative and Biomedical Engineering Team, Institute for Quantum Life Science, National Institutes for Quantum Science and Technology (QST), Anagawa 4-9-1, Chiba Inage-ku, Chiba, 263-8555, Japan
| | - Junichi Nabekura
- School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- Division of Homeostatic Development, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Okazaki, 444-8585, Japan
| | - Kohei Otomo
- Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan
- Department of Biochemistry and Systems Biomedicine, Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Yosuke Okamura
- Micro/Nano Technology Center, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa, 259-1292, Japan
- Department of Applied Chemistry, School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa, 259-1292, Japan
- Course of Applied Science, Graduate School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa, 259-1292, Japan
| | - Tomomi Nemoto
- Division of Biophotonics, National Institute for Physiological Sciences, National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan.
- Biophotonics Research Group, Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan.
- School of Life Science, The Graduate University for Advanced Studies (SOKENDAI), Higashiyama 5-1, Myodaiji, Okazaki, Aichi, 444-8787, Japan.
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19
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Chandran AJ, Rangappa SM, Suyambulingam I, Siengchin S. Waste chicken feather biofiller reinforced bioepoxy resin based biocomposites - A waste to wealth experimental approach. Int J Biol Macromol 2024; 261:129708. [PMID: 38272404 DOI: 10.1016/j.ijbiomac.2024.129708] [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: 09/18/2023] [Revised: 01/04/2024] [Accepted: 01/22/2024] [Indexed: 01/27/2024]
Abstract
Utilizing poultry wastes, particularly chicken feathers, in biopolymer composites is seen as an important aspect in lowering the environmental pollution and paving a new path to sustainability. The main objective of this experimental study is to develop polymer composites reinforced with waste chicken feather fillers and evaluate their physical, mechanical, and thermal characteristics. The composites were fabricated through an open mold casting process using bio epoxy (SR-33 Greenpoxy) as the matrix and chicken feather filler as a reinforcement in three distinct weight fractions (2.5, 5, and 7.5 wt%). To evaluate the effects of filler content on the mechanical properties of the fabricated bio-epoxy composites, they were subjected to tensile, flexural, impact, and hardness tests. The findings from the experimental studies demonstrated that the composites containing 2.5 wt% of chicken feather filler had improved mechanical properties, thermal stability, and crystallization behaviour. The thermal attributes of samples included a greater melting point, lower recrystallization temperature, higher glass transition temperature, and quicker crystallization rates. The Scanning Electron Microscope analysis of the fracture surface morphology of the biocomposites showed a better interfacial adhesion between the filler and matrix. It could be concluded from the results that the waste chicken feather can be used as potential filler reinforcements for begetting natural composites for various low- and medium-density structural and non-structural applications.
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Affiliation(s)
- Arulmozhivarman Joseph Chandran
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand
| | - Sanjay Mavinkere Rangappa
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand.
| | - Indran Suyambulingam
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand
| | - Suchart Siengchin
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand.
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20
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Dong Q, Dai Y, Wang W, Ma Y, Li L. Fabrication of carvacrol loaded cellulose acetate phthalate/shellac composite film and its application to mackerel fillets preservation. Int J Biol Macromol 2024; 262:129904. [PMID: 38311137 DOI: 10.1016/j.ijbiomac.2024.129904] [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: 10/30/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 02/10/2024]
Abstract
In this research, the carvacrol (CAR) loaded cellulose acetate phthalate (CAP) /shellac (SH) films were prepared via electrostatic repulsion strategy and casting method. The CAP/SH-CAR films demonstrated excellent tensile strength, while also exhibiting good UV light barrier and thermal stability. The results showed that the addition of CAR significantly improved the barrier of the CAP film to water vapor and oxygen permeability. When the addition amount of CAR was 0.9 % (w/w) with respect to CAP content, the CAP/SH-CAR films exhibited good antibacterial activity and effectively reduced the growth of S. aureus and E. coli by approximately 47.9 % and 50.9 %, respectively. The presence of SH improved the retention rate of CAR in CAP/SH-CAR films, with the retention rate ranging from 45.2 to 56.8 %. Finally, the CAP/SH-CAR films were applied to preserve the mackerel fillets, indicating that the rate of freshness deterioration had been delayed and showing a good freshness preservation effect. Therefore, the CAP/SH-CAR films have the potential to be used as food packaging materials.
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Affiliation(s)
- Qingfeng Dong
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Yaqi Dai
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Weiting Wang
- Institute of Food & Nutrition Science and Technology, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Agro-Products Processing Technology, Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture, Jinan 250100, China.
| | - Yanli Ma
- Institute of Food & Nutrition Science and Technology, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Agro-Products Processing Technology, Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture, Jinan 250100, China
| | - Li Li
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China.
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21
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Wang Y, Li N, Rao J, Wang T, Li W, Ren X, Wang K, Qiu F. Chemometrics-based Chemical Analysis of Myrrh and Its Vinegar-processed Products by UPLC-MS/MS. Chem Biodivers 2024; 21:e202301782. [PMID: 38263671 DOI: 10.1002/cbdv.202301782] [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: 11/10/2023] [Revised: 01/20/2024] [Accepted: 01/22/2024] [Indexed: 01/25/2024]
Abstract
Myrrh is widely used in clinical practice but accompanied by obvious toxicity. According to traditional Chinese medicines theory, processing with vinegar can effectively reduce its toxicity. However, the detoxification processing technology of Myrrh and the corresponding mechanism have been unclear. The objective of this study is to systematically analyze the variation in chemical composition of raw Myrrh and its processed products using UPLC-Q-TOF-MS/MS coupled with chemometrics. A total of 75 compounds including 56 sesquiterpenoids, 2 diterpenoids, 15 triterpenoids and 2 other types were identified. Raw Myrrh and its processed products were divided into two major groups, and 14 chemical markers were selected out by principal component analysis and partial least square discriminant analysis. Additionally, the exact content of 5 representative chemical markers was determined to be significantly reduced after vinegar-processing by UPLC-QQQ-MS/MS. Moreover, multivariate statistical analysis and the quantitative results comprehensively indicated that the optimized processing method was processing at a ratio of 200 : 5 (Myrrh:vinegar). This research provides not only a reliable foundation for the study of Myrrh, but also a scientific reference for clinical use of this herb.
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Affiliation(s)
- Yuan Wang
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- Tianjin Key Laboratory of Therapeutic Substance of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
| | - Na Li
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- Tianjin Key Laboratory of Therapeutic Substance of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
| | - Jinqiu Rao
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- Tianjin Key Laboratory of Therapeutic Substance of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
| | - Tianwang Wang
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- Tianjin Key Laboratory of Therapeutic Substance of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
| | - Wei Li
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- Tianjin Key Laboratory of Therapeutic Substance of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- Pharmaceutical Sciences, Toho University, Funabashi, Chiba, Japan
| | - Xiaoliang Ren
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- Tianjin Key Laboratory of Therapeutic Substance of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
| | - Kai Wang
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- Tianjin Key Laboratory of Therapeutic Substance of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
| | - Feng Qiu
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- Tianjin Key Laboratory of Therapeutic Substance of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, P.R. China
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22
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Şahansoy H, Caner C, Yüceer M. The shellac and shellac nanocomposite coatings on enhanced the storage stability of fresh eggs for sustainable packaging. Int J Biol Macromol 2024; 261:129817. [PMID: 38286370 DOI: 10.1016/j.ijbiomac.2024.129817] [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: 11/08/2023] [Revised: 01/04/2024] [Accepted: 01/26/2024] [Indexed: 01/31/2024]
Abstract
Shellac bio-coatings can enhance to improve quality and storage stability of fresh egg qualities with improved shell strength therefore minimizing the reduction the egg losses. Shellac bio-chitosan at 3 concentrations (1 %, 4 % and 8 % w/w) and shellac-1 % montmorillonite nanocomposites were applied as biocoatings to improve storage stability. Shellac-8 % (SH-8 %) coated eggs exhibited the lowest weight loss (1.28 %), significantly. The weight loss of shellac 1 % + MMT and 4 % shellac (SH-4 %) coated eggs was similar each other and had lower weight loss than 1 % shellac (SH-1 %). The Haugh Unit (HU) of eggs with SH-8 % (63.75) had the significantly the highest HU. The SH-4 % (60.24) and SH-1 %/MMT-1 % (58.04) were similar, and the control was the lowest one. The albumin pH of SH-8 % (9.15) coated exhibited a significantly lower than SH-4 % (9.21) and SH-1 %/MMT-1 % (9.24), while the control (9.39) was the highest value at end of storage. For the shellac coated group, total soluble values of albumen reached 12.87 (initial) to 16.331 (SH-1 %), 15.96 (SH-4 %), 15.60 (SH-8 %) and 16.15 (SH-%1-MMT-1 %) at the end of storage. The RWC and foam stability of SH-8 %, SH-4 % and SH-1 % MMT-1 % were similar and higher than 1 % SH and uncoated egg samples. The rheology behaviors were maintained with increasing shellac concentration through the storage. SH-8 % biocoatings were very most effective in filling and sealing the porous in the eggshell and protecting the storage stability and enhancing the strength of the eggshell. Shellac bio-coatings acted as a tiny layer for an effective protective barrier to gas permeability for enhancing the storage stability of the fresh eggs. Higher shellac concentrations (4 and 8 %) and 1 %-MMT were enhanced the storage stability and can be vital solutions for improving shell strength, so it decreases breakage rates.
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Affiliation(s)
- Hakan Şahansoy
- Food Engineering Department, Canakkale Onsekiz Mart University, 017020 Canakkale, Turkey
| | - Cengiz Caner
- Food Engineering Department, Canakkale Onsekiz Mart University, 017020 Canakkale, Turkey.
| | - Muhammed Yüceer
- Food Processing Department, Canakkale Onsekiz Mart University, 017020 Canakkale, Turkey.
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23
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Mourão CF, Lowenstein A. What are the emerging trends in dental composite materials in permanent teeth with occlusal cavities: self-adhesive vs traditional? Evid Based Dent 2024; 25:17-18. [PMID: 38182663 DOI: 10.1038/s41432-023-00959-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 12/07/2023] [Indexed: 01/07/2024]
Abstract
DESIGN The research is a systematic review and meta-analysis of randomized controlled trials (RCTs). AIM The study aimed to compare the clinical outcomes of self-adhesive flowable composite resins (SAFCs) versus conventional flowable composite resins (FCs) used in occlusal cavity restorations in permanent teeth. METHODS This research included a search for RCTs. Multiple databases were systematically searched for RCTs with a minimum 1-year follow-up comparing SAFCs to FCs. Outcomes evaluated were retention, secondary caries, marginal adaptation, marginal discoloration, and postoperative sensitivity based on modified USPHS criteria. Risk of bias was assessed using Cochrane RoB 2 tool. Random effects meta-analyses were conducted where applicable. Certainty of evidence was rated using GRADE approach. RESULTS Five RCTs (four parallel and one split mouth) comprising 138 patients were included. During 1- and 2-year recalls, there were generally no significant differences in clinical performance between SAFCs and FCs. However, FCs applied using the etch-and-rinse technique demonstrated statistically better marginal adaptation at 2 years (3 studies, RR 3.21, 95% CI 1.50-6.83) and marginal discoloration (4 studies, RR 3.40, 95% CI 1.10-10.48). The overall quality of evidence ranged from low to moderate. CONCLUSIONS SAFCs showed comparable short-term outcomes to FCs in treating occlusal cavities. Further high-quality RCTs with longer follow-up are warranted to confirm long-term performance of SAFCs. Use of separate enamel etching may improve marginal adaptation and discoloration with FCs.
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Affiliation(s)
- Carlos Fernando Mourão
- Department of Periodontology, Tufts University School of Dental Medicine, Boston, MA, USA.
| | - Adam Lowenstein
- Department of Pediatric Dentistry, Tufts University School of Dental Medicine, Boston, MA, USA
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24
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da Rosa LS, Pilecco RO, Soares PM, Rippe MP, Pereira GKR, Valandro LF, Kleverlaan CJ, Feilzer AJ, Tribst JPM. Repair protocols for indirect monolithic restorations: a literature review. PeerJ 2024; 12:e16942. [PMID: 38406292 PMCID: PMC10893862 DOI: 10.7717/peerj.16942] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 01/23/2024] [Indexed: 02/27/2024] Open
Abstract
Despite the advancements in indirect monolithic restorations, technical complications may occur during function. To overcome this issues, intraoral repair using resin composite is a practical and low-cost procedure, being able to increase the restoration's longevity. This review aimed to evaluate the need for repair and suggest a standardized repair protocol to the main indirect restorative materials. For this, studies were surveyed from PubMed with no language or date restriction, to investigate the scientific evidence of indirect monolithic restoration repair with direct resin composite. A classification to guide clinical decisions was made based on the FDI World Dental Federation criteria about defective indirect restorations considering esthetic and functional standards, along with the patient's view, to decide when polishing, repairing or replacing a defective restoration. Based on 38 surveyed studies, different resin composite intraoral repair protocols, that included mechanical and chemical aspects, were defined depending on the substrate considering resin-based, glass-ceramic or zirconia restorations. The presented criteria and protocols were developed to guide the clinician's decision-making process regarding defective indirect monolithic restorations, prolonging longevity and increasing clinical success.
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Affiliation(s)
| | | | | | | | | | | | - Cornelis Johannes Kleverlaan
- Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
| | - Albert J. Feilzer
- Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
| | - João Paulo Mendes Tribst
- Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
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25
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Radwanski M, Rozpedek-Kaminska W, Galita G, Siwecka N, Sokolowski J, Majsterek I, Özcan M, Lukomska-Szymanska M. Cytotoxicity and genotoxicity of bioceramic root canal sealers compared to conventional resin-based sealer. Sci Rep 2024; 14:4124. [PMID: 38374199 PMCID: PMC10876547 DOI: 10.1038/s41598-024-54726-1] [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] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 02/15/2024] [Indexed: 02/21/2024] Open
Abstract
The aim of this study was to evaluate cytotoxicity and genotoxicity of calcium-silicate based sealers and comparing them with a gold standard-an epoxy-based sealant. Two experimental cell lines were used, gingival fibroblasts (hGF) and monocyte/macrophage peripheral blood cell line (SC). The cytotoxicity (XTT assay) and genotoxicity (comet assay) were evaluated both after 24-h and 48-h incubation. Additionally, after 48-h incubation, the cell apoptosis and cell cycle progression was detected. BioRoot Flow induced a significant decrease in hGF cells viability compared to the negative control groups both after 24-h (p < 0.001) and 48-h incubation (p < 0.01). In group with SC cells, after 24-h incubation significant increase in cells viability was detected for AH Plus Bioceramic Sealer in comparison to negative control (p < 0.05). BioRoot Flow and BioRoot RCS can be considered potentially genotoxic for the hGF cells after 48-h incubation (> 20% DNA damage). BioRoot Flow and BioRoot RCS, may have potential genotoxic effects and induce apoptosis in hGF cells which may irritate periapical tissues, resulting in a delayed healing. The findings of the study would be useful in selection of an appropriate sealant for root canal filling without causing cytotoxicity and genotoxicity.
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Affiliation(s)
| | | | - Grzegorz Galita
- Department of Clinical Chemistry and Biochemistry, Medical University of Lodz, Lodz, Poland
| | - Natalia Siwecka
- Department of Clinical Chemistry and Biochemistry, Medical University of Lodz, Lodz, Poland
| | - Jerzy Sokolowski
- Department of General Dentistry, Medical University of Lodz, 251 Pomorska Str., 92-213, Lodz, Poland
| | - Ireneusz Majsterek
- Department of Clinical Chemistry and Biochemistry, Medical University of Lodz, Lodz, Poland
| | - Mutlu Özcan
- Clinic of Masticatory Disorders and Dental Biomaterials, Center for Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Monika Lukomska-Szymanska
- Department of General Dentistry, Medical University of Lodz, 251 Pomorska Str., 92-213, Lodz, Poland.
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26
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Zhang J, Rui C, Jia C. An interpenetrating polymer networks based on polydivinylbenzene/aminated polyglycidyl methacrylate with better decolorization performance toward reducing sugar solution. Food Chem 2024; 434:137483. [PMID: 37722338 DOI: 10.1016/j.foodchem.2023.137483] [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: 03/04/2023] [Revised: 08/20/2023] [Accepted: 09/11/2023] [Indexed: 09/20/2023]
Abstract
The separation of valuable sugar components from a xylose mother liquor (XML) requires a pre-decolorization over a resin, however the market-available resins show a low performance. To overcome this drawback, an interpenetrating polymer network (IPN) resin was designed for efficiently removing the non-sugar impurities from an XML. The prepared IPN resin showed good decolorization performance for the XML, and the decolorization effect of the XML on the resin modified with a short-chain amination reagent was better. The adsorption capacity of the resin for phenols was significantly improved after an amination-modification, but that for furfural remained constant. The theoretical study confirmed that good decolorization effect of the XML on that resin was mainly ascribed to the synergistic action of adsorption forces, such as π-π stacking and hydrogen bonding.
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Affiliation(s)
- Junwei Zhang
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Changchun Rui
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Caijing Jia
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
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27
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Ramakrishna A, Rathore AS. On-line PAT based monitoring and control of resin aging in protein A chromatography for COGs reduction. J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1234:124010. [PMID: 38266612 DOI: 10.1016/j.jchromb.2024.124010] [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: 11/14/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 01/26/2024]
Abstract
Resin aging is a common occurrence in chromatographic processes and generally influenced by factors such as cleaning procedure and composition of the feed stream. Two major events occur along with protein fouling, one is the loss of protein A ligand and the other is non-specific, irreversible interactions of foulants with resin particles. Both these are responsible for resin aging. As a result, the performance of the resin suffers a fall, and this can be quantified through indicators like reduction in dynamic binding capacity, increased column pressure, or peak broadening. The number of reuse cycles of a resin has a major influence on the cost per batch. This is even more significant in the case of protein A resin, which is the primary cost driver for downstream processing. In this work, we first identify chromatogram characteristics that correlate to resin aging. Next, we propose a data monitoring-based tool for prediction of resin aging. Principal component analysis of the UV data of Mab 1 showed a deviation at 120th cycle and an out of specification at around 149th cycle, corroborating with yield decline. Batch level modelling could deliver a predictable trend for resin aging and was demonstrated for two different Mabs (Mab1 and Mab2). The results demonstrate that significant resin aging can be detected 20-25 cycles prior to observable yield decline. A control strategy has been suggested such that once the deviation has been detected, additional resin cleaning is triggered. Overall, a 50-100 Protein A cycle enhancement in resin lifespan could be achieved.
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Affiliation(s)
| | - Anurag S Rathore
- Dept of Chemical Engineering, Indian Institute of Technology, India.
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28
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Tohamy HAS, Mohamed SAA, El-Sakhawy M, Elsayed AM, Kamel S. Potential application of hydroxypropyl methylcellulose/shellac embedded with graphene oxide/TiO 2-Nps as natural packaging film. Int J Biol Macromol 2024; 257:128589. [PMID: 38052288 DOI: 10.1016/j.ijbiomac.2023.128589] [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: 09/25/2023] [Revised: 11/20/2023] [Accepted: 12/01/2023] [Indexed: 12/07/2023]
Abstract
Graphene oxide (GO), TiO2-NPs, HPMC, and shellac are environmentally green polymers and nanocomposites. This work aimed to create biodegradable composite films made of HPMC/shellac, HPMC/shellac-GO, and HPMC/shellac-GO/TiO2-NPs by film casting. TiO2-HPMC/shellac-GO matrix's dispersibility and mixing ability were characterized and observed using FTIR and XRD. XRD analysis shows that the crystallinity decreased within the composites due to breaking H-bonding. Compared to HPMC/shellac, TGA/DTG demonstrated the composite films' superior thermal stability. TiO2 (0.08-0.16 %) was cast into a composite film comprising HPMC, shellac, and GO. The homogeneity of TiO2 distribution in the composite film was shown using a SEM, which was also used to display the morphology of nanocomposite films. Nanocomposite films' thickness, air permeability, tensile strength, Young's modulus, and burst strength were examined. The results demonstrated that natural films prepared by a combination of shellac/GO with HPMC enhanced the fabricating of films' properties, the tensile strength increased by 231 % (from 16 to 53 MPa) in HPMC and HPSG2 (HPMC 1.9 g/shellac 0.25 g/GO 0.125 g in 100 mL) respectively, whereas the contact angle did not change. And after addition of TiO2-NPs, there were high enhancements in HPMC films' properties, such tensile strength increased by 212 % (from 16 to 50 MPa), burst strength increased by 20.96 % (3.1 to 3.75 Kg/cm2), and the contact angle by 60.86 % (48 to 74°) in HPMC and HPSGT2 respectively. Compared to HPMC films, films exhibited the highest levels of antibacterial activity against E. coli, B. mycoides, and C. albicans. So, the composite films from HPMC/shellac/GO/TiO2-NPs are promising potential packaging materials.
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Affiliation(s)
- Hebat-Allah S Tohamy
- Cellulose and Paper Department, National Research Centre, Dokki, Giza P.O. 12622, Egypt
| | - Salah A A Mohamed
- Packing and Packaging Materials Department, National Research Centre, 33 El Bohouth St., Dokki, Giza P.O. 12622, Egypt.
| | - Mohamed El-Sakhawy
- Cellulose and Paper Department, National Research Centre, Dokki, Giza P.O. 12622, Egypt
| | - Alshaimaa M Elsayed
- Molecular Biology Department, Biotechnology Research Institute, National Research Centre, Dokki, Giza 12622, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, Dokki, Giza P.O. 12622, Egypt
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29
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Yang Y, Liang Q, Zhang B, Zhang J, Fan L, Kang J, Lin Y, Huang Y, Tan TC, Ho LH. Adsorption and desorption characteristics of flavonoids from white tea using macroporous adsorption resin. J Chromatogr A 2024; 1715:464621. [PMID: 38198876 DOI: 10.1016/j.chroma.2023.464621] [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: 09/18/2023] [Revised: 11/29/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024]
Abstract
White tea contains the highest flavonoids compared to other teas. While there have been numerous studies on the components of different tea varieties, research explicitly focusing on the flavonoid content of white tea remains scarce, making the need for a good flavonoid purification process for white tea even more important. This study compared the adsorption and desorption performance of five types of macroporous resins: D101, HP20, HPD500, DM301, and AB-8. Among the tested resins, AB-8 was selected based on its best adsorption and desorption performance to investigate the static adsorption kinetics and dynamic adsorption-desorption purification of white tea flavonoids. The optimal purification process was determined: adsorption temperature 25 °C, crude tea flavonoid extract pH 3, ethanol concentration 80 %, sample loading flow rate and eluent flow rate 1.5 BV/min, and eluent dosage 40 BV. The results indicated that the adsorption process followed pseudo-second-order kinetics. Under the above purification conditions, the purity of the total flavonoids in the purified white tea flavonoid increased from approximately 17.69 to 46.23 %, achieving a 2.61-fold improvement, indicating good purification results. The purified white tea flavonoid can be further used for nutraceutical and pharmaceutical applications.
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Affiliation(s)
- Yuhua Yang
- College of Tea and Food Science, Wuyi University, Wuyishan 354300, PR China; Food Technology Division, School of Industrial Technology, Universiti Sains Malaysia USM, Penang 11800, Malaysia
| | - Quanming Liang
- College of Tea and Food Science, Wuyi University, Wuyishan 354300, PR China
| | - Bo Zhang
- College of Tea and Food Science, Wuyi University, Wuyishan 354300, PR China
| | - Jianming Zhang
- College of Tea and Food Science, Wuyi University, Wuyishan 354300, PR China
| | - Li Fan
- College of Tea and Food Science, Wuyi University, Wuyishan 354300, PR China
| | - Jiahui Kang
- College of Tea and Food Science, Wuyi University, Wuyishan 354300, PR China
| | - Yiqin Lin
- College of Tea and Food Science, Wuyi University, Wuyishan 354300, PR China
| | - Yan Huang
- College of Tea and Food Science, Wuyi University, Wuyishan 354300, PR China.
| | - Thuan-Chew Tan
- Food Technology Division, School of Industrial Technology, Universiti Sains Malaysia USM, Penang 11800, Malaysia; Renewable Biomass Transformation Cluster, School of Industrial Technology, Universiti Sains Malaysia USM, Penang 11800, Malaysia.
| | - Lee-Hoon Ho
- Department of Food Industry, Faculty of Bioresources and Food Industry, Universiti Sultan Zainal Abidin, Besut, Terengganu 22200, Malaysia
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30
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Perumal P, Sathakkathulla NA, Kumaran K, Ravikumar R, Selvaraj JJ, Nagendran V, Gurusamy M, Shaik N, Gnanavadivel Prabhakaran S, Suruli Palanichamy V, Ganesan V, Thiraviam PP, Gunalan S, Rathinasamy S. Green synthesis of zinc oxide nanoparticles using aqueous extract of shilajit and their anticancer activity against HeLa cells. Sci Rep 2024; 14:2204. [PMID: 38273022 PMCID: PMC10810832 DOI: 10.1038/s41598-024-52217-x] [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: 08/09/2023] [Accepted: 01/16/2024] [Indexed: 01/27/2024] Open
Abstract
In the present study, ZnO nanoparticles have been synthesized using an aqueous extract of shilajit. The nanoparticles were characterized using different techniques such as UV (ultraviolet-visible spectrophotometer), FTIR (Fourier transform infrared), XRD (X-ray diffraction), particle size analysis, SEM (scanning electron microscope) and EDAX (Energy-dispersive X-ray) analysis. The UV absorption peak at 422.40 nm was observed for ZnO nanoparticles. SEM analysis showed the shape of nanoparticles to be spherical, FTIR spectrum confirmed the presence of zinc atoms, particle size analysis showed the nanoparticle size, EDAX confirmed the purity of ZnO nanoparticles whereas XRD pattern similar to that of JCPDS card for ZnO confirmed the presence of pure ZnO nanoparticles. The in vitro anticancer activity of ZnO nanoparticles against the HeLa cell line showed the IC50 value of 38.60 μg/mL compared to reference standard cisplatin. This finding confirms that ZnO nanoparticles from shilajit extract have potent cytotoxic effect on human cervical cancer cell lines.
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Affiliation(s)
- Parthasarathi Perumal
- Department of Molecular and Cell Biology Lab, Greensmed Labs, Thoraipakkam, Chennai, 600097, India
| | | | - Kalaivani Kumaran
- Department of Pharmaceutical Chemistry, EGS Pillay College of Pharmacy, Nagapattinam, 611002, India
| | - Ramaladevi Ravikumar
- Department of Pharmaceutical Chemistry, EGS Pillay College of Pharmacy, Nagapattinam, 611002, India
| | - Justin Jayaraj Selvaraj
- Department of Pharmaceutical Chemistry, EGS Pillay College of Pharmacy, Nagapattinam, 611002, India
| | - Vijayakumar Nagendran
- Department of Pharmaceutical Chemistry, EGS Pillay College of Pharmacy, Nagapattinam, 611002, India
| | - Mariappan Gurusamy
- Department of Pharmaceutics, St. Mary's College of Pharmacy, Secunderabad, Telangana, 500025, India
| | - Naazneen Shaik
- Department of Pharmaceutics, St. Mary's College of Pharmacy, Secunderabad, Telangana, 500025, India
| | | | - Vinothkumar Suruli Palanichamy
- Department of Pharmaceutical Chemistry, Pannai College of Pharmacy (Affiliated to the Tamil Nadu Dr. M.G.R. Medical University, Chennai), Dindigul, 624005, India
| | - Vellaichamy Ganesan
- Department of Pharmaceutical Chemistry, Pannai College of Pharmacy (Affiliated to the Tamil Nadu Dr. M.G.R. Medical University, Chennai), Dindigul, 624005, India
| | | | - Seshan Gunalan
- Centre of Advanced Study in Crystallography and Biophysics, Guindy Campus, University of Madras, Chennai, 600025, India
| | - Suresh Rathinasamy
- Department of Molecular and Cell Biology Lab, Greensmed Labs, Thoraipakkam, Chennai, 600097, India.
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Bar Dolev M, Adar C, Sirotinskaya V, Braslavsky I. Large-Scale Purification of Natural Ice-Binding Proteins by the Falling Water Ice Purification Method. Methods Mol Biol 2024; 2730:63-71. [PMID: 37943450 DOI: 10.1007/978-1-0716-3503-2_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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
We describe here a generic technique for purification of ice-binding proteins (IBPs) using a commercial ice machine. The method, which is called falling water ice purification (FWIP) [1], is based on the affinity of the proteins to ice, and it is therefore suitable for any IBP, natural and synthetic, with and without fused segments or domains. The FWIP method does not require the addition of tags to the protein, nor the use of resins and additives, and is suitable for large-scale purification. These features may turn FWIP useful also in the food and medical sectors.
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Affiliation(s)
- Maya Bar Dolev
- Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
- Faculty of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, Israel
| | - Chen Adar
- Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Vera Sirotinskaya
- Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Ido Braslavsky
- Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel.
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Hernández-Mendieta LA, Scougall-Vilchis RJ, Rodríguez-Vilchis LE, Teutle-Coyotecatl B, Velázquez-Enríquez U, Contreras-Bulnes R. Effect of a demineralization model on the microhardness, surface roughness and topography of giomers: An in vitro study. Microsc Res Tech 2024; 87:65-77. [PMID: 37675958 DOI: 10.1002/jemt.24412] [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: 04/21/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 09/08/2023]
Abstract
The purpose of this study is to compare the effect of a demineralization model on the microhardness, surface roughness, and topography of giomers.Seventy-two discs of six different dental materials in three different presentations (pit and fissure sealant (PFS), flowable and restorative materials) were divided into six groups (n = 12 p/g). Three experimental groups (giomers) consisted of BeautiSealant, Beautifil Flow Plus, and Beautifil II, and three control groups (resin-based materials) were formed using ClinproTM, FiltekTM Z350 XT Flow, and Filtek™ Bulk Fill materials. Vickers microhardness, surface roughness, and topographic analysis with atomic force microscopy were measured at the beginning (0) after four (1) and 7 days (2) of immersion in a demineralizing model. Statistical analysis was performed using One-way and Repeated Measures ANOVA and Pearson's correlation coefficient (p ≤ .05). The microhardness values showed significant variations, except for the G_RM group. All the groups presented significant increases in roughness through the experiment stages, except for RB_PFS in the Ra parameter. The topographic analysis showed variations in the micromorphology, especially in the experimental group at the end of the demineralization model. Finally, there was no correlation between microhardness and surface roughness. The demineralization model decreased the microhardness, with the lowest reductions in the giomers groups. The effect of the demineralizing model on the surface roughness and topography showed an increase in specific patterns for the experimental and control groups. Therefore, their clinical use is recommended. RESEARCH HIGHLIGHTS: The demineralization model decreased the microhardness property of the evaluated materials, with better performance for the giomer groups. The effect of the demineralizing model on surface roughness showed an increase with specific patterns for the experimental and control groups. Although the materials presented changes in their microhardness, roughness, and topography, their clinical use is recommended.
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Affiliation(s)
- Luz Alejandra Hernández-Mendieta
- Facultad de Odontología, Centro de Investigación y Estudios Avanzados en Odontología (CIEAO), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Rogelio José Scougall-Vilchis
- Facultad de Odontología, Centro de Investigación y Estudios Avanzados en Odontología (CIEAO), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Laura Emma Rodríguez-Vilchis
- Facultad de Odontología, Centro de Investigación y Estudios Avanzados en Odontología (CIEAO), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Bernardo Teutle-Coyotecatl
- Facultad de Odontología, Centro de Investigación y Estudios Avanzados en Odontología (CIEAO), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Ulises Velázquez-Enríquez
- Facultad de Odontología, Centro de Investigación y Estudios Avanzados en Odontología (CIEAO), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Rosalía Contreras-Bulnes
- Facultad de Odontología, Centro de Investigación y Estudios Avanzados en Odontología (CIEAO), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
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Radwan MM, Abdou A, Nagi N, Younes DH, Mahrous A. Wear characteristics of esthetic resin matrix and zirconia reinforced lithium disilicate CAD/CAM materials: two-body wear and surface topography analysis. Minerva Dent Oral Sci 2023; 72:280-290. [PMID: 37255305 DOI: 10.23736/s2724-6329.23.04779-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND This in vitro study assessed the wear behavior of different CAD-CAM blocks and the abrasion of the enamel antagonist against these materials. METHODS 64 disk-shaped specimens were prepared from 8 different CAD/CAM blocks as follow: one lithium disilicate glass ceramics block "IPS Emax CAD" as control group, two zirconia reinforced lithium silicate "Vita Suprinity & Celtra DUO," one interpenetrating network ceramic block "Vita Enamic," Three resin-based block composites "Lava Ultimate, Cerasmart & Brilliant-crios" as well as one hybrid nanoceramic "Shofu block HC". All specimens were mounted against canine and tested for two body wear analysis using a chewing simulating loading machine (100,000 cycles, 50 N, 5/55 °C). The amount of wear loss was measured for each specimen using a digital precise scale. Wear area before and after the chewing simulation were evaluated using an optical profilometer. Data analysed using one-way ANOVA test followed by Tukey's post hoc. RESULTS The results showed a significantly higher wear loss in resin matrix ceramics in comparison to glass ceramics. However, for tooth wear glass ceramics had significantly higher value than hybrid ceramics. CONCLUSIONS Resin based CAD/CAM Blocks gives a superior result when evaluating the wear behavior and its effect on the opposing tooth surface.
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Affiliation(s)
- Mohamed M Radwan
- Department of Fixed Prosthodontics, Faculty of Dentistry, Bani-Suef University, Bani-Suef, Egypt
| | - Ahmed Abdou
- Department of Prosthetic Dentistry, Faculty of Dentistry, King Salman International University, El Tur, Egypt -
| | - Nermeen Nagi
- Department of Fixed Prosthodontics, Faculty of Dentistry, Fayoum University, Fayoum, Egypt
| | - Dina H Younes
- Department of Oral Medicine, Periodontology, Oral Diagnosis and Radiology, Faculty of Dentistry, University of Zagazig, Zagazig, Egypt
| | - Aliaa Mahrous
- Department of Fixed Prosthodontics, Faculty of Dentistry, Fayoum University, Fayoum, Egypt
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Beh YH, Halim MS, Ariffin Z. The load capacity of maxillary central incisor with simulated flared root canal restored with different fiber-reinforced composite post and cementation protocols. PeerJ 2023; 11:e16469. [PMID: 38025677 PMCID: PMC10658903 DOI: 10.7717/peerj.16469] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 10/25/2023] [Indexed: 12/01/2023] Open
Abstract
Background This study aimed to evaluate the load capacity of maxillary central incisors with simulated flared root canal restored with different fiber-reinforced composite (FRC) post cemented with either self-adhesive or self-etch resin cement and its mode of fracture. Methods Sixty-five extracted maxillary incisors were decoronated, its canal was artificially flared and randomly categorized into group tFRC (tapered FRC post) (n = 22), mFRC (multi-FRC post) (n = 21), and DIS-FRC (direct individually shaped-FRC (DIS-FRC) post) (n = 22), which were further subdivided based on cementation resin. The posts were cemented and a standardized resin core was constructed. After thermocycling, the samples were loaded statically and the maximum load was recorded. Results The load capacity of the maxillary central incisor was influenced by the different FRC post system and not the resin cement (p = 0.289), and no significant interaction was found between them. Group mFRC (522.9N) yielded a significantly higher load capacity compared to DIS-FRC (421.1N). Overall, a 55% favorable fracture pattern was observed, and this was not statistically significant. Conclusion Within the limitation of the study, it can be concluded that prefabricated FRC posts outperform DIS-FRC posts in terms of the load capacity of a maxillary central incisor with a simulated flared root canal. The cementation methods whether a self-adhesive or self-etch resin cement, was not demonstrated to influence the load capacity of a maxillary central incisor with a flared root canal. There were no significant differences between the favorable and non-favorable fracture when FRC post systems were used to restored a maxillary central incisor with a flared root canal.
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Affiliation(s)
- Yew Hin Beh
- Department of Restorative Dentistry, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Mohamad Syahrizal Halim
- Conservative Dentistry Unit, School of Dental Sciences, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
| | - Zaihan Ariffin
- Prosthodontics Unit, School of Dental Sciences, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
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Yehualaw A, Tafere C, Yilma Z, Abrha S. Formulation and In Vitro Evaluation of Furosemide Floating Matrix Tablets Using Boswellia papyrifera Resin as Matrix Forming Polymer. Biomed Res Int 2023; 2023:4322375. [PMID: 37929241 PMCID: PMC10622601 DOI: 10.1155/2023/4322375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 07/24/2023] [Accepted: 08/05/2023] [Indexed: 11/07/2023]
Abstract
The stomach and upper part of the small intestine are where furosemide is primarily absorbed when treating edema brought on by congestive heart failure (CHF), hepatic cirrhosis, renal impairment, and nephrotic syndrome. This narrow absorption window is responsible for furosemide's limited oral bioavailability. So creating a gastroretentive floating tablet could be beneficial. Natural polymers are advised for use in medication delivery because they are readily available in nature, biodegradable, relatively inexpensive, biocompatible, and nontoxic. Olibanum is a natural plant-based polymer obtained from Boswellia genus of trees and mainly composed of alcohol-soluble resin (65-85%). Ethiopia is rich in Boswellia species, with Boswellia papyrifera being the most important oleo-gum resin-producing tree species. In order to formulate a gastroretentive floating matrix tablet of furosemide, this study looked at the use of naturally occurring, locally available B. papyrifera resin as a matrix-forming polymer. By directly compressing B. papyrifera resin and HPMC K4M as matrix-forming polymers and sodium bicarbonate as a gas-generating agent, floating matrix tablets were created. The effects of the formulation variables polymer type, polymer concentration, polymer ratio, and percentage of the floating agent on the floating lag time, total floating time (duration), and cumulative drug release in 12 hours were investigated. Furosemide floating tablets formulated employing higher (40%) polymer concentrations (olibanum resin, HPMC K4M, or in combination) and 10% sodium bicarbonate as gas-generating agent demonstrated a floating lag time of less than 6 minutes and a sustained release with a total floating time of more than 12 hours. Comparing the release characteristics of floating tablets made with 40% of a total polymer and 10% of NaHCO3 revealed that the medicine is released very slowly when polymers were combined. The matrix-forming polymer, olibanum resin, obtained from B. papyrifera, was effectively used to make furosemide floating matrix tablets. The olibanum resin from B. papyrifera can therefore be used as a potential substitute matrix-forming polymer in the production of effervescent floating matrix tablets.
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Affiliation(s)
- Adane Yehualaw
- Department of Pharmacy, College of Medicine and Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia
| | - Chernet Tafere
- Department of Pharmacy, College of Medicine and Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia
| | - Zewdu Yilma
- Department of Pharmacy, College of Medicine and Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia
| | - Solomon Abrha
- Department of Pharmaceutics, School of Pharmacy, Mekelle University, Mekelle, Ethiopia
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Alt F, Heinemann C, Kruppke B. Class I Biocompatible DLP-Printed Acrylate Impairs Adhesion and Proliferation of Human Mesenchymal Stromal Cells in Indirect Cytotoxicity Assay. Biomed Res Int 2023; 2023:8305995. [PMID: 37869629 PMCID: PMC10590261 DOI: 10.1155/2023/8305995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 06/30/2023] [Accepted: 07/13/2023] [Indexed: 10/24/2023]
Abstract
The popular method of digital light processing 3D printing (DLP) for complex and individual laboratory equipment requires materials that are as inert as possible for use in contact with cells for subsequent investigations. However, the per se incomplete curing of acrylate resins by UV light leaves residuals that are not suitable for cell culture application. Therefore, we evaluated the cytotoxicity of four commercially available acrylate resins with bone marrow-derived human mesenchymal stromal cells (BM-hMSC) in an indirect cytotoxicity test. This involved incubating the printed cylinders in Transwell™ inserts for 7 days. While the degree of crosslinking did not increase significantly between freshly printed and stored samples (3 weeks in ambient conditions), the storage improved the material's performance in terms of cytocompatibility. The DNA amount and LDH activity showed a direct influence of the resin residuals on cell adhesion. The class I acrylate Surgical Guide™ left no adherent cells after 7 days, regardless of previous storage. In comparison, the Basic Ivory™ resin after storage allowed same amount of adherent cells after 7 days as the polystyrene reference. We conclude that resin residuals of certain materials are released, which allows the use of the resins in indirect contact with cells thereafter.
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Affiliation(s)
- Franziska Alt
- Institute of Materials Science, Faculty of Mechanical Science and Engineering, Technical University Dresden, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Christiane Heinemann
- Institute of Materials Science, Faculty of Mechanical Science and Engineering, Technical University Dresden, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
| | - Benjamin Kruppke
- Institute of Materials Science, Faculty of Mechanical Science and Engineering, Technical University Dresden, TU Dresden, Budapester Str. 27, 01069 Dresden, Germany
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Cherepanova MO, Subotyalov MA. Component Composition and Biological Activity of Oleo-Gum Resin from Boswellia serrata (Burseraceae). Dokl Biol Sci 2023; 512:336-342. [PMID: 38087024 DOI: 10.1134/s0012496623700643] [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: 05/05/2023] [Revised: 06/17/2023] [Accepted: 06/23/2023] [Indexed: 12/18/2023]
Abstract
The review summarizes the published data on identification of biologically active compounds (BACs) and the pharmacological potential of various components of oleo-gum resin from the Indian frankincense Boswellia serrata Roxb. ex Colebr. Boswellia oleo-gum resin contains a wide range of BACs from the classes of mono-, sesqui-, di-, and triterpenes. Numerous in vivo and in vitro studies demonstrated their anti-inflammatory and antiproliferative effects. Boswellic acids (BAs), which belong to the tetra- and pentacyclic triterpenoid classes, showed the highest anti-inflammatory activity. The frankincense resin is traditionally used in Ayurvedic and Unani medicine and can provide a promising source to design drugs effective in treating musculoskeletal disorders.
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Affiliation(s)
- M O Cherepanova
- Novosibirsk State Pedagogical University, Novosibirsk, Russia
| | - M A Subotyalov
- Novosibirsk State Pedagogical University, Novosibirsk, Russia.
- Novosibirsk State University, Novosibirsk, Russia.
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de Almeida-Junior S, Ferraz MVF, de Oliveira AR, Maniglia FP, Bastos JK, Furtado RA. Advances in the phytochemical screening and biological potential of propolis. Fundam Clin Pharmacol 2023; 37:886-899. [PMID: 37038052 DOI: 10.1111/fcp.12898] [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: 08/30/2022] [Revised: 02/13/2023] [Accepted: 04/05/2023] [Indexed: 04/12/2023]
Abstract
Propolis is a natural resinous product collected from different parts of plants by bees and mixed with their salivary secretions. The occurrence of more than 180 different chemotypes has flavonoids, phenolic acids, esters, and phenolic aldehydes, as well as balsamic resins, beeswax, pollen, and essential and aromatic oils, among others. Its biological potential documented throughout the world justifies the need, from time to time, to organize reviews on the subject, with the intention of gathering and informing about the update on propolis. In this review (CRD42020212971), phytochemical advances, in vitro, in vivo, and clinical biological assays of pharmacological interest are showcased. The focus of this work is to present propolis clinical safety assays, antitumor, analgesic, antioxidant, anti-inflammatory, and antimicrobial activities. This literature review highlights propolis' promising biological activity, as it also suggests that studies associating propolis with nanotechnology should be further explored for enhanced bioprocessing applications.
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Affiliation(s)
- Silvio de Almeida-Junior
- Biosciences and Health Laboratory, State University of Minas Gerais, Belo Horizonte, Brazil
- Postgraduate Program in Health Promotion, University of Franca, Franca, Brazil
| | - Matheus Vitor Ferreira Ferraz
- Department of Fundamental Chemistry, Federal University of Pernambuco, UFPE, Recife, Brazil
- Heidelberg Institute for Theoretical Studies, Heidelberg, Germany
| | - Alex Roberto de Oliveira
- Postgraduate Program in Animal Science, Animal Science Laboratory, University of Franca, Franca, Brazil
| | | | - Jairo Kenupp Bastos
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Ricardo Andrade Furtado
- Postgraduate Program in Health Promotion, University of Franca, Franca, Brazil
- Postgraduate Program in Animal Science, Animal Science Laboratory, University of Franca, Franca, Brazil
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Zhang Y, Liu Y, Wang B, Fu M, Liu P, Wei JH. Structure and histochemistry of the stem of Dracaena cambodiana Pierre ex Gagnep. Microsc Res Tech 2023; 86:1333-1344. [PMID: 36919819 DOI: 10.1002/jemt.24317] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/06/2023] [Accepted: 03/03/2023] [Indexed: 03/16/2023]
Abstract
Dracaena cambodiana Pierre ex Gagnep is an important plant resource for producing dragon's blood and one of most popular ornamental trees in China. For a better understanding of the physiological function of the stem, the structural characteristics and main substance histological location of the stems of D. cambodiana were studied. The structural characteristics of the different developmental stages of stems of D. cambodiana were observed and described detailly. And then a schematic diagram of the mature stem was created. Histochemical staining showed that two kinds of polysaccharides distributed in parenchymal cells. Saponins distributed mainly in ground tissue and phenolic compounds distributed mainly in the thick cell walls. An abundant of calcium oxalate raphide bundles were identified in cortex and primary tissue. Finally, the role of the above results in the taxonomy of Dracaena species and in their strong adaptability was discussed.
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Affiliation(s)
- Yuxiu Zhang
- Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine, Hainan Branch of the Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Haikou, China
| | - Yang Liu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Bocheng Wang
- Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine, Hainan Branch of the Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Haikou, China
| | - Meilong Fu
- Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine, Hainan Branch of the Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Haikou, China
| | - Peiwei Liu
- Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine, Hainan Branch of the Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Haikou, China
| | - Jian-He Wei
- Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine, Hainan Branch of the Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Haikou, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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40
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Yadav AG, Mohapatra PK, Valsala TP, Sathe DB, Bhatt RB. Highly efficient separation of Am(III) and Pu(IV) from lean feeds and soil using an extraction chromatographic resin containing a diglycolamide in an ionic liquid. J Chromatogr A 2023; 1707:464299. [PMID: 37597478 DOI: 10.1016/j.chroma.2023.464299] [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: 08/10/2023] [Accepted: 08/12/2023] [Indexed: 08/21/2023]
Abstract
A TODGA based extraction chromatographic resin containing an ionic liquid was used for the separation of actinide ions such as Am3+ and Pu4+ from samples such as lean effluents emanating from laboratory waste, environmental water as well as soil samples adjacent to a nuclear plant site. The methodology involved feed adjustment to 3 M HNO3 followed by conditioning of the column, loading, washing (3 M HNO3), and elution of the actinide ions. The elution of Am3+ was done using EDTA in a buffered medium (1 M guanidine carbonate) while that of Pu4+ was carried out using a mixture of 0.5 M oxalic acid and 0.5 M HNO3. The elution peaks were sharp with almost no tailing suggesting the efficiency of the separation method. The results obtained were compared with the literature results which suggested the high efficiency of the present method.
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Affiliation(s)
- Akalesh G Yadav
- Advanced Fuel Fabrication Facility, Nuclear Recycles Board, Tarapur, Maharashtra 401502, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
| | - Prasanta K Mohapatra
- Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India; Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
| | - Thichur P Valsala
- Advanced Fuel Fabrication Facility, Nuclear Recycles Board, Tarapur, Maharashtra 401502, India
| | - Darshan B Sathe
- Advanced Fuel Fabrication Facility, Nuclear Recycles Board, Tarapur, Maharashtra 401502, India
| | - Raj B Bhatt
- Advanced Fuel Fabrication Facility, Nuclear Recycles Board, Tarapur, Maharashtra 401502, India
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Usmani MT, Shoaib MH, Siddiqui F, Ahmed FR, Yousuf RI, Saleem MT. Formulation development, in vivo bioequivalence and pediatric PBPK modeling studies of taste-masked ciprofloxacin chewable tablets. Sci Rep 2023; 13:16070. [PMID: 37752265 PMCID: PMC10522605 DOI: 10.1038/s41598-023-43423-0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 09/23/2023] [Indexed: 09/28/2023] Open
Abstract
A taste-masked chewable tablet of ciprofloxacin using ion exchange resin Kyron T-134 for enhancing compliance for the paediatric population was developed. The drug-to-resin ratio was optimized for maximum taste masking by studying the effects of soaking time (X1) and mixing time (X2) on complexation (%) using Central Composite Rotatable Design (CCRD). The resin complexes were characterized by bitterness score, DSC, FTIR, and PXRD. The complex was further formulated and optimized into chewable tablets through full factorial design, The optimized formulation was subjected to a bioequivalence study, and a virtual approach of PBPK modelling was adapted to predict the pharmacokinetics of the drug in the paediatric group. The drug resin ratio of 1:1.5 yielded an optimum drug loading of 99.05%. The optimized formulation shows minimum disintegration time with more than 99% drug release within 30 min. The formulation F-9 was found to be bioequivalent with a geometric mean ratio of Cmax, Tmax, AUC0-t, and AUC0-∞ within 90% CI. It was concluded that quality by design approach can successfully be applied to optimize the drug resin ratio and PBPK modeling is a successful predictive tool for estimating the pharmacokinetics of ciprofloxacin HCl in the paediatric population.
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Affiliation(s)
- Muhammad Talha Usmani
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Muhammad Harris Shoaib
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan.
- Bioavailability and Bioequivalence Research Facility, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan.
| | - Fahad Siddiqui
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
- Bioavailability and Bioequivalence Research Facility, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Farrukh Rafiq Ahmed
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Rabia Ismail Yousuf
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Muhammad Talha Saleem
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
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Liu L, Li X, Dong G, Zhang H, Tao YF, He R, Xu J, Ma J, Tang B, Zhou B. Bioinspired Natural Shellac Dressing for Rapid Wound Sealing and Healing. ACS Appl Mater Interfaces 2023; 15:43294-43308. [PMID: 37695271 DOI: 10.1021/acsami.3c06734] [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] [Indexed: 09/12/2023]
Abstract
Developing safe and effective wound dressings that address the complexities of wound healing is an ongoing goal in biomaterials research. Inspired by the shield used to protect lac insects, we have designed and developed a type of bioactive shellac-based wound dressing in this paper. The dressing exhibited a high adhesion energy of 146.6 J·m-2 in porcine skin and showed a reversible binding due to its pH sensitivity. Meanwhile, a novel "shellac-like" compound, n-octacosanol gallate ester, has been synthesized and added to the dressing to improve its antibacterial and blood coagulation properties. The novel shellac-based dressing could be sprayed to form a sticky film within 70 s for rapid hemostasis and wound sealing, which could be conveniently applied to various wounds on extensible body parts. In addition, the shellac-based dressing can actively promote the healing of a full-thickness wound in the skin of mice. We also used molecular dynamics simulations to investigate the interactions between the shellac molecule and the phospholipid bilayer and attempted to show that the shellac molecule was beneficial for wound healing. This work provides a novel and practical bioinspired wound dressing with significant properties, facile preparation, and ease of use, which is an interesting alternative to its traditional counterparts.
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Affiliation(s)
- Lanxiang Liu
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Xiang Li
- Yunnan Province Key Laboratory of Wood Adhesives and Glued Products, Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, International Joint-Research Center for Bio-Materials, Ministry of Science and Technology, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
- College of Life Science and College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
| | - Gang Dong
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Hong Zhang
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Yun-Feng Tao
- College of Life Science and College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
| | - Rui He
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Juan Xu
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Jinju Ma
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Baoshan Tang
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Bei Zhou
- Yunnan Province Key Laboratory of Wood Adhesives and Glued Products, Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, International Joint-Research Center for Bio-Materials, Ministry of Science and Technology, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
- College of Life Science and College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
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Al-Dabbas MM, Al-Jaloudi R, Abdullah MA, Abughoush M. Characterization of Olive Oil Volatile Compounds after Elution through Selected Bleaching Materials-Gas Chromatography-Mass Spectrometry Analysis. Molecules 2023; 28:6444. [PMID: 37764219 PMCID: PMC10537359 DOI: 10.3390/molecules28186444] [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: 07/13/2023] [Revised: 08/24/2023] [Accepted: 08/27/2023] [Indexed: 09/29/2023] Open
Abstract
Using different bleaching materials to eliminate or reduce organic volatiles in deteriorated olive oils will positively affect its characteristics. This study aims to identify the volatiles of oxidized olive oil after physical bleaching using selected immobilized adsorbents. Oxidized olive oil was eluted using open-column chromatography packed with silica gel, bentonite, resin, Arabic gum, and charcoal at a 1:5 eluent system (w/v, adsorbent: oxidized olive oil). The smoke point was determined. The collected distilled vapor was injected into GC-MS to identify the volatiles eluted after partial refining with each of these bleaching compounds. The results showed that volatile compounds were quantitatively and qualitatively affected by the type of adsorbents used for the elution of olive oil and the smoking points of eluted oils. The most prominent detected volatile compounds were limonene (14.53%), piperitone (10.35%), isopropyl-5-methyl-(2E)-hexenal (8.6%), methyl octadecenoate (6.57%), and citronellyl acetate (5.87%). Both bentonite and resin were superior in decreasing the ratio of volatile compounds compared with other bleaching materials used. Resin immobilized medium was significantly affected (p < 0.05), raising the smoke point. These results highlighted some information regarding the characteristics of volatile compounds that result after the physical elution of olive oil through selected adsorbents.
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Affiliation(s)
- Maher M. Al-Dabbas
- Department of Nutrition and Food Technology, The University of Jordan, Amman 11942, Jordan;
- Science of Nutrition and Dietetics Program, College of Pharmacy, Al Ain University, Abu Dhabi P.O. Box 64141, United Arab Emirates;
| | - Rawan Al-Jaloudi
- Department of Medical Science Support, Zarqa University College, Al-Balqa Applied University, As-Salt 19117, Jordan;
| | - Mai Adnan Abdullah
- Department of Nutrition and Food Technology, The University of Jordan, Amman 11942, Jordan;
| | - Mahmoud Abughoush
- Science of Nutrition and Dietetics Program, College of Pharmacy, Al Ain University, Abu Dhabi P.O. Box 64141, United Arab Emirates;
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Hu J, Zhu Y, Deng S, Wang Z, He F. Outcome of root canal treatment using warm vertical compaction with bioceramic and resin-based sealers: A randomised clinical trial. AUST ENDOD J 2023; 49 Suppl 1:170-178. [PMID: 36378149 DOI: 10.1111/aej.12713] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 10/24/2022] [Accepted: 10/29/2022] [Indexed: 11/16/2022]
Abstract
This study aimed to compare the effect of a bioceramic sealer (iRoot SP) and a resin-based sealer (AH Plus) on the outcome of root canal treatment in a 2-year follow-up. Seventy-six teeth with irreversibly or necrotic pulp were recruited. After instrumentation and disinfection, the root canals were obturated using warm vertical compaction with iRoot SP (n = 43) or AH Plus (n = 33). Patients were followed up by clinical and radiographic examination at 6 12 and 24 months with recall rates of 84.2%, 65.8% and 48.7%, respectively. During each recall session, the success rates were 80%, 85.2% and 85% in the iRoot SP group and 82.8%, 91.3% and 88.2% in the AH Plus group. The success rates of the two groups did not differ significantly (p > 0.05). The bioceramic sealer resulted in a similar clinical performance and success rate to the resin-based sealer in endodontic treatment during a 2-year follow-up.
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Affiliation(s)
- Jinghao Hu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Yunjie Zhu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Shuli Deng
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Zeji Wang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Fuming He
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
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Yang S, Chen S, He TF, Wei Y, Shen J. Preparation of sustainable mineral oil-free offset printing ink with vegetable oil esters. Environ Sci Pollut Res Int 2023; 30:97404-97415. [PMID: 37594716 DOI: 10.1007/s11356-023-29309-8] [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: 05/29/2023] [Accepted: 08/08/2023] [Indexed: 08/19/2023]
Abstract
Mineral oils are used in substantial quantities for the production of varnishes and inks due to their abundance and versatility. However, as part of the production process, some of mineral oil components are separated as waste material, whereupon they can mix with air, water, or soil and become potentially harmful to the environment. Almost all these waste materials are volatile organic compounds (VOCs), chemicals that can easily evaporate at room temperature and have toxic effect. Therefore, a novel green, mineral oil-free offset printing ink was produced using vegetable oil esters as bio-renewable raw materials. Accompanying varnishes were prepared with linseed oil, methyl oleate, octyl stearate, and four types of resin (A, B, C, and D). The application of these varnishes to magenta color offset ink was subsequently studied to screen out the best combination of resin and ester in terms of setting time. Meanwhile, dyeing force tests were conducted to evaluate the ink's printability, while rheological analysis was done via viscosity and flowability tests. The setting time of the magenta color offset ink made by varnish A was observed to be considerably shorter than that of the ink samples prepared using varnishes B, C, and D. Furthermore, varnish A proved to be a good alternative varnish for the production of yellow, cyan, and black color offset printing inks. Samples of these inks were printed on coated paper, and their printability was contrasted against that of vegetable oil-based (pure vegetable oil), mineral oil-based, and other mineral oil-free offset printing inks. Results determined that the varnishes produced with linseed oil, methyl oleate, and octyl stearate can replace mineral oil-based varnishes for the production of offset printing ink.
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Affiliation(s)
- Shujie Yang
- Hangzhou Toka Ink Co., Ltd., Zhejiang, 310018, Hangzhou, China
| | - Shaojun Chen
- Hangzhou Toka Ink Co., Ltd., Zhejiang, 310018, Hangzhou, China.
| | - Tie Fei He
- Hangzhou Toka Ink Co., Ltd., Zhejiang, 310018, Hangzhou, China
| | - Yingjie Wei
- Hangzhou Toka Ink Co., Ltd., Zhejiang, 310018, Hangzhou, China
| | - Jianbin Shen
- Hangzhou Toka Ink Co., Ltd., Zhejiang, 310018, Hangzhou, China
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Nishio F, Morita K, Doi K, Kato M, Abekura H, Yamaoka H, Kakimoto N, Tsuga K. Radiopaque properties of polyetheretherketone crown at laboratory study. J Oral Biosci 2023; 65:253-258. [PMID: 37230464 DOI: 10.1016/j.job.2023.05.002] [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: 01/22/2023] [Revised: 05/16/2023] [Accepted: 05/17/2023] [Indexed: 05/27/2023]
Abstract
OBJECTIVES There have been no reports on the radiopaque properties of new polyetheretherketone (PEEK) crowns for locating crowns during accidental ingestion or aspiration and detection of secondary caries, which is essential information for clinical application. This study aimed to investigate whether the radiopaque properties of PEEK crowns could be used to identify the site of accidental ingestion or aspiration and detect secondary caries. METHODS Four types of crowns were fabricated: three non-metal crowns (PEEK, hybrid resin, and zirconia) and one full metal cast crown (gold-silver-palladium alloy). Initially, the images for these crowns were compared using intraoral radiography, chest radiography, cone-beam computed tomography (CBCT), and multi-detector computed tomography (MDCT); computed tomography (CT) values were calculated. Subsequently, the images for the crowns placed on the secondary caries model with two artificial cavities were compared using intraoral radiography. RESULTS The PEEK crowns displayed the lowest radiopaque properties on radiography and very few artifacts were observed on CBCT and MDCT. On the other hand, the CT values of the PEEK crowns were a little lower than those of the hybrid resin crowns and considerably lower than the zirconia and full metal cast crowns. The cavity could be detected in the PEEK crown-placed secondary caries model through intraoral radiography. CONCLUSIONS This simulated study of radiopaque properties with four types of crowns suggested that a radiographic imaging system can be used to identify the site of accidental ingestion and aspiration of PEEK crowns and to detect secondary caries of the abutment tooth within a PEEK crown.
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Affiliation(s)
- Fumiko Nishio
- Department of Fixed Prosthetic Dentistry, Field of Oral and Maxillofacial Rehabilitation, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Koji Morita
- Department of Advanced Prosthodontics, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
| | - Kazuya Doi
- Department of Advanced Prosthodontics, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Masamichi Kato
- Department of Advanced Prosthodontics, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hitoshi Abekura
- Department of Advanced Prosthodontics, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hidehisa Yamaoka
- Section of Imaging Diagnosis, Department of Clinical Support, Hiroshima University Hospital, Hiroshima, Japan
| | - Naoya Kakimoto
- Department of Oral and Maxillofacial Radiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kazuhiro Tsuga
- Department of Advanced Prosthodontics, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Li Y, Li X, Wang X, Xue J, Zhang R, Ding Y, Chu X, Su J. Study on Extraction and Purification of Acanthopanax senticosus Polyphenols by an Ionic Liquid-Assisted Aqueous Two-Phase System. Molecules 2023; 28:6383. [PMID: 37687211 PMCID: PMC10490139 DOI: 10.3390/molecules28176383] [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: 08/11/2023] [Revised: 08/26/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023] Open
Abstract
This study aimed to extract and purify polyphenols from Acanthopanax senticosus. A new green method was developed, in which ionic liquids (ILs) were used as aqueous two-phase (ATP) adjuvants to extract the polyphenols from A. senticosus. An ionic liquid-assisted aqueous two-phase system (IL-ATPS) was established. The purification of the polyphenols from the extraction fluid by AB-8 macroporous resin was conducted, and the kinetic mechanisms were studied. The reuse of ionic liquids was executed. The results showed that an [OMIM]Br-assisted ethanol/NaH2PO4 system (IL-ATPS) was the best extraction solvent. In this study, the following optimal extraction conditions were determined: 32 wt.% ethanol, 25 wt.% NaH2PO4, 9 wt.% additional ionic liquid, a solid-liquid ratio of 1:40 g/mL, an extraction temperature of 50 °C, a pH of 4.0, an extraction time of 50 min, and an extraction rate of the polyphenols at 15.90 mg/g. The optimum adsorption parameters of the macroporous resin AB-8 were as follows: a flow rate of 3.5 BV·h-1, a sample volume of 40 mL, an elution flow rate of 3.5 BV·h-1, an eluent volume of 80 mL, and an eluant that was constituted by an 85% volume fraction of ethanol. The decolorization effect of 4% activated carbon was better than the other amounts; in addition, a decolorization rate of 76.81% and an ionic liquid recovery rate of 81.12% were found to be the most optimal. Compared with the traditional extraction methods, IL-ATPS has the advantages of requiring simple operation, saving time, and high efficiency. In addition, it can be used for the extraction of the polyphenolic compounds.
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Affiliation(s)
| | | | | | | | | | | | - Xiuling Chu
- Shandong Provincial Institute of Chinese Veterinary Medicine, Liaocheng University, Liaocheng 252000, China; (Y.L.); (X.L.); (X.W.); (J.X.); (R.Z.); (Y.D.)
| | - Jianqing Su
- Shandong Provincial Institute of Chinese Veterinary Medicine, Liaocheng University, Liaocheng 252000, China; (Y.L.); (X.L.); (X.W.); (J.X.); (R.Z.); (Y.D.)
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48
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Patil H, Sudagar IP, Pandiselvam R, Sudha P, Boomiraj K. Development and characterization of rigid packaging material using cellulose/sugarcane bagasse and natural resins. Int J Biol Macromol 2023; 246:125641. [PMID: 37394220 DOI: 10.1016/j.ijbiomac.2023.125641] [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: 04/01/2023] [Revised: 06/06/2023] [Accepted: 06/29/2023] [Indexed: 07/04/2023]
Abstract
Composites developed from cellulose and natural resins have received much attention due to their low cost and positive environmental impact. Knowledge of the mechanical and degradation characteristics of cellulose based composite boards is essential to obtain indications of the strength and degradability of the resulting rigid packaging material. The composite was prepared with sugarcane bagasse and hybrid resin (a combination of epoxy and natural resin such as dammar, pine, and cashew nut shell liquid) with the mixing ratios (Bagasse fibers: Epoxy resin: Natural resin) 1:1:1.5, 1:1:1.75, and 1:1:2 using compression moulding method. Tensile strength, young's modulus, flexural strength, soil burial weight loss, microbial degradation, and CO2 evolution was determined. Cashew nut shell liquid (CNSL) resin-incorporated composite boards in the mixing ratio of 1:1:2 gave maximum flexural strength (5.10 MPa), tensile strength (3.10 MPa), and tensile modulus (0.97 MPa). The maximum degradation in soil burial test and CO2 evolution between the boards made using natural resin was found in the composite boards incorporated with CNSL resin with a mixing ratio of 1:1:1.5 were 8.30 % and 12.8 % respectively. The maximum weight loss percentage (3.49) in microbial degradation analysis was found in the composite board made using dammar resin in the mixing ratio of 1:1:1.5.
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Affiliation(s)
- Hrishikesh Patil
- Department of Food Process Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Tamil Nadu, India
| | - I P Sudagar
- Department of Processing and Food Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Kumulur, Tamil Nadu, India.
| | - R Pandiselvam
- Physiology, Biochemistry and Post-Harvest Technology Division, ICAR-Central Plantation Crops Research Institute, Kasaragod 671 124, Kerala, India.
| | - P Sudha
- Department of Food Process Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Tamil Nadu, India
| | - K Boomiraj
- Department of Agro Climate Research Center, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
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Bueno CRE, Benetti F, Cury MTS, Vasques AMV, Cosme-Silva L, Queiroz ÍODA, da Silva ACR, Jacinto RDC, Cintra LTA, Dezan-Junior E. Biological investigation of resinous endodontic sealers containing calcium hydroxide. PLoS One 2023; 18:e0287890. [PMID: 37459336 PMCID: PMC10351732 DOI: 10.1371/journal.pone.0287890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 06/14/2023] [Indexed: 07/20/2023] Open
Abstract
The purpose of this study was to evaluate, in vivo, the biocompatibility, biomineralization, collagen maturation and the in vitro antibacterial and cytotoxicity of resinous endodontic sealers containing calcium hydroxide. Forty rats were implanted with polyethylene tubes containing Sealer 26, Sealer Plus, Dia-ProSeal and an empty tube, examined after 7, 15, 30 and 60 days. Antimicrobial activity was evaluated against Enterococcus faecalis by Agar Diffusion Test (ADT) through inhibition zones. For cytotoxicity, undifferentiated pulp cells (OD-21) were cultured and assessed using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, exposed to dilution of serial extracts at 6, 24, 48h. Cytotoxicity was analyzed by two-way ANOVA and Bonferroni correction. Kruskal-Wallis test followed by Dunn test was performed for nonparametric data (p<0.05). MTT assay revealed cell proliferation affected by sealers extract in all periods (p<0.0001), except for Dia-Proseal and Sealer Plus ⅛ dilution. Subcutaneous analysis showed at day 7th moderate inflammatory infiltration. After 30 days, Sealer 26 still showed moderate inflammatory infiltrate compared to mild inflammation from control and Dia-ProSeal (p = 0.006). At day 60th, all groups showed similar mild inflammatory infiltrate (p>0.05). Sealer 26 induced more biomineralization than other sealers in all periods. At 7 and 15 days, all sealers had significant percentage of immature collagen fibers. After 60 days Sealer 26 showed more mature fibers compared to other sealers (p<0.001). All sealers had a smaller zone of inhibition than chlorhexidine, but with no significant difference among any group (p>0.05). All sealers showed satisfactory biological responses with in vitro/in vivo biocompatibility and antimicrobial activity against planktonic bacteria. Sealer 26 induced more biomineralization than Sealer Plus and Dia-ProSeal.
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Affiliation(s)
- Carlos Roberto Emerenciano Bueno
- Department of Preventive and Restorative Dentistry, Endodontic Section, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Francine Benetti
- Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Marina Tolomei Sandoval Cury
- Department of Preventive and Restorative Dentistry, Endodontic Section, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Ana Maria Veiga Vasques
- Department of Preventive and Restorative Dentistry, Endodontic Section, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Leopoldo Cosme-Silva
- Department of Restorative Dentistry, School of Dentistry, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil
| | - Índia Olinta de Azevedo Queiroz
- Department of Preventive and Restorative Dentistry, Endodontic Section, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Ana Cláudia Rodrigues da Silva
- Department of Preventive and Restorative Dentistry, Endodontic Section, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Rogério de Castilho Jacinto
- Department of Preventive and Restorative Dentistry, Endodontic Section, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Luciano Tavares Angelo Cintra
- Department of Preventive and Restorative Dentistry, Endodontic Section, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Eloi Dezan-Junior
- Department of Preventive and Restorative Dentistry, Endodontic Section, School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
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50
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Pereira TS, Clementino LC, Freire-Maia J, Martins-Júnior PA. Retention in fissure resin-based sealants in schoolchildren: the etching step importance. Evid Based Dent 2023; 24:79-80. [PMID: 37193878 DOI: 10.1038/s41432-023-00894-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 03/23/2023] [Indexed: 05/18/2023]
Abstract
DESIGN Randomized controlled trial. STUDY POPULATION Forty-seven schoolchildren aged 9-10 years with fully sound/noncavitated erupted first permanent molars were included and randomly allocated in control and experimental groups in a split-mouth design. CASES 47 schoolchildren (94 molars) fissure sealants applied using self-etch universal adhesive system. CONTROLS 47 schoolchildren (94 molars) fissure sealants applied using conventional acid-etching technique. OUTCOME MEASURE Retention of sealants and secondary caries incidence (ICDAS). DATA ANALYSIS Chi-square test. RESULTS Conventional acid-etch sealants retention was superior to self-etch after 6 and 24 months (p < 0.001), but no differences were found in caries incidence after 6 and 24 months (p > 0.05). CONCLUSIONS Clinical retention of fissure sealants using conventional acid-etch technique is greater than self-etch.
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Affiliation(s)
- Túlio Silva Pereira
- Department of Child and Adolescent Oral Health, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Luna Chagas Clementino
- Department of Child and Adolescent Oral Health, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Juliana Freire-Maia
- Department of Child and Adolescent Oral Health, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Paulo Antônio Martins-Júnior
- Department of Child and Adolescent Oral Health, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
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