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Dong HL, Zhang C, Dai L, Zhang Y, Zhang XH, Tan ZJ. The origin of different bending stiffness between double-stranded RNA and DNA revealed by magnetic tweezers and simulations. Nucleic Acids Res 2024; 52:2519-2529. [PMID: 38321947 PMCID: PMC10954459 DOI: 10.1093/nar/gkae063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 01/16/2024] [Accepted: 01/19/2024] [Indexed: 02/08/2024] Open
Abstract
The subtle differences in the chemical structures of double-stranded (ds) RNA and DNA lead to significant variations in their biological roles and medical implications, largely due to their distinct biophysical properties, such as bending stiffness. Although it is well known that A-form dsRNA is stiffer than B-form dsDNA under physiological salt conditions, the underlying cause of this difference remains unclear. In this study, we employ high-precision magnetic-tweezer experiments along with molecular dynamics simulations and reveal that the relative bending stiffness between dsRNA and dsDNA is primarily determined by the structure- and salt-concentration-dependent ion distribution around their helical structures. At near-physiological salt conditions, dsRNA shows a sparser ion distribution surrounding its phosphate groups compared to dsDNA, causing its greater stiffness. However, at very high monovalent salt concentrations, phosphate groups in both dsRNA and dsDNA become fully neutralized by excess ions, resulting in a similar intrinsic bending persistence length of approximately 39 nm. This similarity in intrinsic bending stiffness of dsRNA and dsDNA is coupled to the analogous fluctuations in their total groove widths and further coupled to the similar fluctuation of base-pair inclination, despite their distinct A-form and B-form helical structures.
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Affiliation(s)
- Hai-Long Dong
- School of Physics and Technology, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Chen Zhang
- School of Physics and Technology, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Liang Dai
- Department of Physics, City University of Hong Kong, Hong Kong 999077, China
| | - Yan Zhang
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan 430072, China
| | - Xing-Hua Zhang
- School of Physics and Technology, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
| | - Zhi-Jie Tan
- School of Physics and Technology, College of Life Sciences, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430072, China
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2
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Ramos TN, Champagne B. Disentangling the molecular polarizability and first hyperpolarizability of methanol-air interfaces. Phys Chem Chem Phys 2024; 26:8658-8669. [PMID: 38437015 DOI: 10.1039/d4cp00043a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
Liquid-air interfaces have extensive implications in different areas of interest because the dynamical processes at the interface can be different from those in bulk. Thus, its characterization, understanding, and control may be pivotal in advancing discoveries. However, characterizing the interface requires special and selective tools to avoid signals from the bulk region. This surface specificity and versatility is achieved by using the second harmonic generation (SHG) responses. This study adopts multiscale simulation methods to evaluate the surface SHG responses of methanol-air interfaces with submonolayer resolution tackled by sequentially using classical molecular dynamics simulations under different temperatures and then employing quantum chemistry methods to compute the molecular first hyperpolarizabilities (β). This approach ensures the configurational diversity required to evaluate the average β values. The main achievements are (i) a quasi-absence of surface sensitivity of the mean polarizability 〈α〉 with values about 2% larger than those obtained in bulk, (ii) conversely, smooth variations on the polarizability anisotropy Δα are observed up to the fourth molecular layer at around 20 Å from the interface, and (iii) narrow interfacial effects on the SHG responses, β(-2ω;ω,ω), which are limited to the first molecular layer (∼3.0 Å) and characterized by a high contrast in the βZZZ(-2ω;ω,ω) tensor component between the first and the subsequent layers. Similar trends are obtained at different temperatures or when increasing the number of methanol molecules treated at the quantum chemistry level, indicating the robustness of the approach for describing the dipolar molecular responses of air-liquid interfaces.
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Affiliation(s)
- Tárcius N Ramos
- Theoretical Chemistry Lab, Unit of Theoretical and Structural Physical Chemistry, Namur Institute of Structured Matter, University of Namur, rue de Bruxelles, 61, B-5000 Namur, Belgium.
| | - Benoît Champagne
- Theoretical Chemistry Lab, Unit of Theoretical and Structural Physical Chemistry, Namur Institute of Structured Matter, University of Namur, rue de Bruxelles, 61, B-5000 Namur, Belgium.
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3
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Alizadeh M, Radevici I, Li S, Oksanen J. Chemovoltaic effect for renewable liquid and vapor fuels on semiconductor surfaces. CHEMSUSCHEM 2024; 17:e202301522. [PMID: 38305144 DOI: 10.1002/cssc.202301522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 01/07/2024] [Accepted: 02/01/2024] [Indexed: 02/03/2024]
Abstract
The chemovoltaic effect - generation of electronic excitation by exergonic redox reactions - has been observed on metallic surfaces of Schottky junctions and is proving to be pivotal in explaining in detail the momentum conservation relations of chemically active collisions. As shown in this work, it can hold keys for direct chemical energy harvesting by semiconductor solar cells. To study the possibilities of chemovoltaic energy conversion by semiconductors, we have modeled and designed an 'electrolyte-free fuel cell' formed by a GaAs diode that can host electrochemical fuel oxidation and oxidant reduction reactions on its conduction and valence bands and as a result convert renewable chemical energy (as well as light) into electricity. The experimental results show that exposing the surface of a suitably designed solar cell to methanol liquid or vapor in the presence of oxygen or hydrogen peroxide leads to the generation of electrical power.
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Affiliation(s)
- Mahdi Alizadeh
- Engineered Nanosystems Group, School of Science, Aalto University, Tietotie 1, Espoo, 02150, Finland
| | - Ivan Radevici
- Engineered Nanosystems Group, School of Science, Aalto University, Tietotie 1, Espoo, 02150, Finland
| | - Shengyang Li
- Engineered Nanosystems Group, School of Science, Aalto University, Tietotie 1, Espoo, 02150, Finland
| | - Jani Oksanen
- Engineered Nanosystems Group, School of Science, Aalto University, Tietotie 1, Espoo, 02150, Finland
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Wijesinghe S, Kosgallana C, Senanayake M, Mohottalalage SS, Zolnierczuk P, Stingaciu L, Grest GS, Perahia D. From ionic clusters dynamics to network constraints in ionic polymer solutions. Phys Rev E 2024; 109:034501. [PMID: 38632780 DOI: 10.1103/physreve.109.034501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 02/29/2024] [Indexed: 04/19/2024]
Abstract
Physical networks formed by ionizable polymers with ionic clusters as crosslinks are controlled by coupled dynamics that transcend from ionic clusters through chain motion to macroscopic response. Here, the coupled dynamics, across length scales, from the ionic clusters to the networks in toluene swollen polystyrene sulfonate networks, were directly correlated, as the electrostatic environment of the physical crosslinks was altered. The multiscale insight is attained by coupling neutron spin echo measurements with molecular dynamics simulations, carried out to times typical of relaxation of polymers in solutions. The experimental dynamic structure factor is in outstanding agreement with the one calculated from computer simulations, as the networks are perturbed by elevating the temperature and changing the electrostatic environment. In toluene, the long-lived clusters remain stable over hundreds of ns across a broad temperature range, while the polymer network remains dynamic. Though the size of the clusters changes as the dielectric constant of the solvent is modified through the addition of ethanol, they remain stable but morph, enhancing the polymer chain dynamics.
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Affiliation(s)
- Sidath Wijesinghe
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634, USA
- Department of Chemistry, Appalachian State University, Boone, North Carolina 26808, USA
| | | | - Manjula Senanayake
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634, USA
| | | | - Piotr Zolnierczuk
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Laura Stingaciu
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Gary S Grest
- Sandia National Laboratories, Albuquerque, New Mexico 87175, USA
| | - Dvora Perahia
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634, USA
- Department of Physics, Clemson University, Clemson, South Carolina 29631, USA
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5
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Yang J, Yan H, Zhang QA, Song Y, Li Y, Tang A. A Universal Additive Design Strategy to Modulate Solvation Structure and Hydrogen Bond Network toward Highly Reversible Fe Anode for Low-Temperature All-Iron Flow Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307354. [PMID: 37821406 DOI: 10.1002/smll.202307354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/02/2023] [Indexed: 10/13/2023]
Abstract
Aqueous all-iron redox flow batteries (RFBs) are promising competitors for next-generation grid-scale energy storage applications. However, the high-performance operation of all-iron RFBs in a wider temperature range is greatly hindered by inferior iron plating/stripping reaction and low solid-liquid transition temperature at Fe anode. Herein, a universal electrolyte additive design strategy for all-iron RFBs is reported, which realizes a highly reversible and dendrite-free Fe anode at low temperatures. Quantum chemistry calculations first screen several organic molecules with oxygen-containing functional groups and identify N,N-Dimethylacetmide (DMAc) as a potential candidate with low cost, high solubility, and strong interactions with Fe2+ and H2 O. Combined experimental characterizations and theoretical calculations subsequently demonstrate that adding DMAc into the FeCl2 solution effectively reshapes the primary solvation shell of Fe2+ via the Fe2+ -O (DMAc) bond and breaks hydrogen-bonding network of water through intensified H-bond interaction between DMAc and H2 O, thereby affording the Fe anode with enhanced Fe/Fe2+ reversibility and lower freezing point. Consequently, the assembled all-iron RFB achieves an excellent combination of high power density (25 mW cm-2 ), long charge-discharge cycling stability (95.59% capacity retention in 103 h), and preeminent battery efficiency at -20 °C (95% coulombic efficiency), which promise a future for wider temperature range operation of all-iron RFBs.
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Affiliation(s)
- Jing Yang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110000, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110000, P. R. China
| | - Hui Yan
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110000, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110000, P. R. China
| | - Qi-An Zhang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110000, P. R. China
| | - Yuanfang Song
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110000, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110000, P. R. China
| | - Ying Li
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110000, P. R. China
| | - Ao Tang
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110000, P. R. China
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Belashov AV, Zhikhoreva AA, Gorbunova IA, Sasin ME, Shayakhmedov SS, Semenova IV. Photophysical properties of Radachlorin photosensitizer in solutions of different pH, viscosity and polarity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 305:123480. [PMID: 37827004 DOI: 10.1016/j.saa.2023.123480] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 09/28/2023] [Accepted: 09/29/2023] [Indexed: 10/14/2023]
Abstract
We present a thorough experimental investigation of fluorescence properties of Radachlorin photosensitizer in solutions of different acidity, viscosity and polarity. Experiments were performed using time-resolved fluorescence lifetime imaging and time-resolved analysis of polarized fluorescence. Variations of solution acidity resulted in considerable changes of Radachlorin fluorescence quantum yield and lifetime in the pH range from 4 to 7, but did not affect the rotational diffusion time, and almost did not change the quantum yield and characteristic times of singlet oxygen phosphorescence. Variations of solution polarity and viscosity were achieved by changing ethanol or methanol fraction in aqueous solution. The decrease of solution polarity resulted in nonlinear rise of Radachlorin fluorescence quantum yield and lifetime up to alcohol concentration of 50%-65%, as well as in considerable rise of singlet oxygen quantum yield and significant changes in characteristic times of its phosphorescence. Variations of solution viscosity resulted in changes of rotational diffusion time of Radachlorin molecules, which appeared to be in perfect correlation with methanol solution viscosity. Good correspondence with ethanol solution viscosity was observed only up to 50% alcohol fraction. Deviations of rotational diffusion time of Radachlorin molecules from direct proportionality with solution viscosity at higher ethanol concentrations were suggested to be due to different solvation conditions. The data obtained can give important reference points for analysis of microenvironment of Radachlorin molecules, their intracellular localization and performance in singlet oxygen generation.
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Affiliation(s)
- A V Belashov
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg, 194021, Russia
| | - A A Zhikhoreva
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg, 194021, Russia
| | - I A Gorbunova
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg, 194021, Russia
| | - M E Sasin
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg, 194021, Russia
| | - Sh S Shayakhmedov
- Chemical Analysis and Materials Research Centre, St.Petersburg State University, St.Petersburg, 198504, Russia
| | - I V Semenova
- Ioffe Institute, 26, Polytekhnicheskaya, St.Petersburg, 194021, Russia.
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7
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Lee SM, Balakrishnan HK, Doeven EH, Yuan D, Guijt RM. Chemical Trends in Sample Preparation for Nucleic Acid Amplification Testing (NAAT): A Review. BIOSENSORS 2023; 13:980. [PMID: 37998155 PMCID: PMC10669371 DOI: 10.3390/bios13110980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/02/2023] [Accepted: 11/07/2023] [Indexed: 11/25/2023]
Abstract
Nucleic acid amplification testing facilitates the detection of disease through specific genomic sequences and is attractive for point-of-need testing (PONT); in particular, the early detection of microorganisms can alert early response systems to protect the public and ecosystems from widespread outbreaks of biological threats, including infectious diseases. Prior to nucleic acid amplification and detection, extensive sample preparation techniques are required to free nucleic acids and extract them from the sample matrix. Sample preparation is critical to maximize the sensitivity and reliability of testing. As the enzymatic amplification reactions can be sensitive to inhibitors from the sample, as well as from chemicals used for lysis and extraction, avoiding inhibition is a significant challenge, particularly when minimising liquid handling steps is also desirable for the translation of the assay to a portable format for PONT. The reagents used in sample preparation for nucleic acid testing, covering lysis and NA extraction (binding, washing, and elution), are reviewed with a focus on their suitability for use in PONT.
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Affiliation(s)
- Soo Min Lee
- Centre for Regional and Rural Futures (CeRRF), Deakin University, Locked Bag 20000, Geelong, VIC 3220, Australia
| | - Hari Kalathil Balakrishnan
- Department of Chemical Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates;
| | - Egan H. Doeven
- School of Life and Environmental Sciences, Deakin University, Locked Bag 20000, Geelong, VIC 3220, Australia;
| | - Dan Yuan
- School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, QLD 4072, Australia;
| | - Rosanne M. Guijt
- Centre for Regional and Rural Futures (CeRRF), Deakin University, Locked Bag 20000, Geelong, VIC 3220, Australia
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8
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Kresse J, Georgi M, Hübner R, Eychmüller A. Structural investigations of Au-Ni aerogels: morphology and element distribution. NANOSCALE ADVANCES 2023; 5:5487-5498. [PMID: 37822903 PMCID: PMC10563840 DOI: 10.1039/d3na00359k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 09/11/2023] [Indexed: 10/13/2023]
Abstract
The physical properties of nanomaterials are determined by their structural features, making accurate structural control indispensable. This carries over to future applications. In the case of metal aerogels, highly porous networks of aggregated metal nanoparticles, such precise tuning is still largely pending. Although recent improvements in controlling synthesis parameters like electrolytes, reductants, or mechanical stirring, the focus has always been on one particular morphology at a time. Meanwhile, complex factors, such as morphology and element distributions, are studied rather sparsely. We demonstrate the capabilities of precise morphology design by deploying Au-Ni, a novel element combination for metal aerogels in itself, as a model system to combine common aerogel morphologies under one system for the first time. Au-Ni aerogels were synthesized via modified one- and two-step gelation, partially combined with galvanic replacement, to obtain aerogels with alloyed, heterostructural (novel metal aerogel structure of interconnected nanoparticles and nanochains), and hollow spherical building blocks. These differences in morphology are directly reflected in the physisorption behavior, linking the isotherm shape and pore size distribution to the structural features of the aerogels, including a broad-ranging specific surface area (35-65 m2 g-1). The aerogels were optimized regarding metal concentration, destabilization, and composition, revealing some delicate structural trends regarding the ligament size and hollow sphere character. Hence, this work significantly improves the structural tailoring of metal aerogels and possible up-scaling. Lastly, preliminary ethanol oxidation tests demonstrated that morphology design extends to the catalytic performance. All in all, this work emphasizes the strengths of morphology design to obtain optimal structures, properties, and (performances) for any material application.
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Affiliation(s)
- Johannes Kresse
- Physical Chemistry, TU Dresden Zellescher Weg 19 Dresden 01069 Germany
| | - Maximilian Georgi
- Physical Chemistry, TU Dresden Zellescher Weg 19 Dresden 01069 Germany
| | - René Hübner
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V. Dresden 01328 Germany
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Harnsoongnoen S, Loutchanwoot P, Srivilai P. Sensing High 17β-Estradiol Concentrations Using a Planar Microwave Sensor Integrated with a Microfluidic Channel. BIOSENSORS 2023; 13:bios13050541. [PMID: 37232902 DOI: 10.3390/bios13050541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 05/05/2023] [Accepted: 05/10/2023] [Indexed: 05/27/2023]
Abstract
The global issue of pollution caused by endocrine-disrupting chemicals (EDCs) has been gaining increasing attention. Among the EDCs of environmental concern, 17β-estradiol (E2) can produce the strongest estrogenic effects when it enters the organism exogenously through various routes and has the potential to cause harm, including malfunctions of the endocrine system and development of growth and reproductive disorders in humans and animals. Additionally, in humans, supraphysiological levels of E2 have been associated with a range of E2-dependent disorders and cancers. To ensure environmental safety and prevent potential risks of E2 to human and animal health, it is crucial to develop rapid, sensitive, low cost and simple approaches for detecting E2 contamination in the environment. A planar microwave sensor for E2 sensing is presented based on the integration of a microstrip transmission line (TL) loaded with a Peano fractal geometry with a narrow slot complementary split-ring resonator (PF-NSCSRR) and a microfluidic channel. The proposed technique offers a wide linear range for detecting E2, ranging from 0.001 to 10 mM, and can achieve high sensitivity with small sample volumes and simple operation methods. The proposed microwave sensor was validated through simulations and empirical measurements within a frequency range of 0.5-3.5 GHz. The E2 solution was delivered to the sensitive area of the sensor device via a microfluidic polydimethylsiloxane (PDMS) channel with an area of 2.7 mm2 and sample value of 1.37 µL and measured by a proposed sensor. The injection of E2 into the channel resulted in changes in the transmission coefficient (S21) and resonance frequency (Fr), which can be used as an indicator of E2 levels in solution. The maximum quality factor of 114.89 and the maximum sensitivity based on S21 and Fr at a concentration of 0.01 mM were 1746.98 dB/mM and 40 GHz/mM, respectively. Upon comparing the proposed sensor with the original Peano fractal geometry with complementary split-ring (PF-CSRR) sensors without a narrow slot, several parameters were evaluated, including sensitivity, quality factor, operating frequency, active area, and sample volume. The results showed that the proposed sensor exhibited an increased sensitivity of 6.08% and had a 40.72% higher quality factor, while the operating frequency, active area, and sample volume showed decreases of 1.71%, 25%, and 28.27%, respectively. The materials under tests (MUTs) were analyzed and categorized into groups using principal component analysis (PCA) with a K-mean clustering algorithm. The proposed E2 sensor has a compact size and simple structure that can be easily fabricated with low-cost materials. With the small sample volume requirement, fast measurement with a wide dynamic range, and a simple protocol, this proposed sensor can also be applied to measure high E2 levels in environmental, human, and animal samples.
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Affiliation(s)
- Supakorn Harnsoongnoen
- The Biomimicry for Sustainable Agriculture, Health, Environment and Energy Research Unit, Department of Physics, Faculty of Science, Mahasarakham University, Kantarawichai District, Maha Sarakham 44150, Thailand
| | - Panida Loutchanwoot
- Department of Biology, Faculty of Science, Mahasarakham University, Kantarawichai District, Maha Sarakham 44150, Thailand
| | - Prayook Srivilai
- Department of Biology, Faculty of Science, Mahasarakham University, Kantarawichai District, Maha Sarakham 44150, Thailand
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Tian Y, Zheng W, Zhang X, Wang Y, Xiao Y, Yao D, Zhang H. Triple Ligand Engineered Gold Nanoclusters with Enhanced Fluorescence and Device Compatibility for Efficient Electroluminescence Light-Emitting Diodes. NANO LETTERS 2023; 23:4423-4430. [PMID: 37129890 DOI: 10.1021/acs.nanolett.3c00725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Gold nanoclusters (Au NCs) are potential emitters for electroluminescent light-emitting diodes (EL-LEDs) but restricted by the limited photoluminescence quantum yield (PLQY) and poor device compatibility. Herein, triple ligand engineered Au NCs enable the fabrication of Au NC-based LEDs with improved EL efficiency. Rigidified triple ligand shells greatly reduce the nonradiative transition and thus increase the PLQY of Au NCs from 2.1 to 73.4%. Most importantly, this strategy significantly improves the compatibility between Au NCs and charge transport materials in EL-LED fabrication. As a result, the EL-LEDs reach a maximum brightness of 1104 cd/m2 and an external quantum efficiency of 5.1%, which is the highest recorded for any reported Au NC-based EL-LEDs.
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Affiliation(s)
- Ye Tian
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Weijia Zheng
- Department of Chemistry, University of Victoria, Victoria, BC V8P 5C2, Canada
| | - Xiaoyu Zhang
- School of Materials Science & Engineering, Jilin University, Changchun 130012, P. R. China
| | - Yinghui Wang
- College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Yanwei Xiao
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Dong Yao
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Hao Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, 450001, P. R. China
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11
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Kim DH, Jekal S, Kim CG, Chu YR, Noh J, Kim MS, Lee N, Song WJ, Yoon CM. Facile Enhancement of Electrochemical Performance of Solid-State Supercapacitor via Atmospheric Plasma Treatment on PVA-Based Gel-Polymer Electrolyte. Gels 2023; 9:gels9040351. [PMID: 37102963 PMCID: PMC10137675 DOI: 10.3390/gels9040351] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/13/2023] [Accepted: 04/20/2023] [Indexed: 04/28/2023] Open
Abstract
A facile oxygen (O2) atmospheric plasma treatment is applied to a polyvinyl alcohol (PVA) matrix to enhance its wettability and hydrophilicity. The optimal plasma treatment conditions are determined by varying the applied plasma power and plasma treatment time. A PVA matrix treated with a plasma power of 120 W for 5 s shows the most hydrophilicity owing to successful formation of carbonyl (-CO, >C=O) functional groups without any structural degradation. The plasma-treated PVA matrix is used as the gel-polymer electrolyte of a solid-state supercapacitor (SSC) by immersing solid matrix into various liquid electrolytes, such as sodium sulfate (Na2SO4), sulfuric acid (H2SO4), and potassium hydroxide (KOH). Compared with the pristine PVA-based device, PVA-120W5/Na2SO4-, PVA-120W5/H2SO4-, and PVA-120W5/KOH-based SSCs show 2.03, 2.05, and 2.14 times higher specific capacitances, respectively. The plasma-treated PVA matrix shows increased specific capacitance owing to the increased wettability, which in turn increases the ion transportation and reduces the electrical resistance. This study successfully demonstrates that the electrochemical performance of a SSC can be readily enhanced through plasma treatment for a short time (≤5 s).
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Affiliation(s)
- Dong-Hyun Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Suk Jekal
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Chan-Gyo Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Yeon-Ryong Chu
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Jungchul Noh
- McKetta Department of Chemical Engineering and Texas Material Institute, The University of Texas at Austin, Austin, TX 78712, USA
| | - Min Sang Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Neunghi Lee
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Woo-Jin Song
- Department of Polymer Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Organic Materials Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Chang-Min Yoon
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
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Azael Ludeña Huaman M, Vega-Chacón J, Isabel Huamán Quispe R, Cecilia Valderrama Negron A. Synthesis and swelling behaviors of poly (2-hydroxyethyl methacrylate-co-itaconic acid) and poly (2-hydroxyethyl methacrylate-co-sodium itaconate) hydrogels as potential drug carriers. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Juçara Fruit ( Euterpe Edulis Martius) Valorization Combining Emergent Extraction Technologies and Aqueous Solutions of Alkanediols. Molecules 2023; 28:molecules28041607. [PMID: 36838595 PMCID: PMC9966649 DOI: 10.3390/molecules28041607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/01/2023] [Accepted: 02/02/2023] [Indexed: 02/10/2023] Open
Abstract
Anthocyanins from juçara fruits were extracted by pressurized liquid extraction (PLE) or ultrasound-assisted extraction (UAE), using aqueous solutions of 1,2-alkanediols and glycerol ethers as biobased solvents. The PLE (100 bar, 13 min, 1 mL/min flow rate) in the optimal extraction conditions originated 23.1 mganthocyanins·gdry biomass-1. On the other hand, the UAE was 10 min long, and the optimal conditions using 1,2-propanediol were 42.6 wt%, 160 W, and pH 7.0, leading to 50 mganthocyanins·gdry biomass-1. Extractions at the UAE optimized conditions, with aqueous solutions of five different 1,2-alkanediols and three glycerol ethers were performed, and compared to water and ethanolic extracts. The biobased solvent solutions presented anthocyanin yields up to 33% higher than water, and were shown to be as efficient as ethanol/water, but generated extracts with higher antioxidant capacity. The anthocyanin-rich extract of juçara, obtained with 1,2-propanediol, was used in the production of a natural soap and incorporated into a cream, showing that the addition of the juçara extract resulted in an antioxidant capacity in both products.
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Goldberg MA, Antonova OS, Donskaya NO, Fomin AS, Murzakhanov FF, Gafurov MR, Konovalov AA, Kotyakov AA, Leonov AV, Smirnov SV, Obolkina TO, Kudryavtsev EA, Barinov SM, Komlev VS. Effects of Various Ripening Media on the Mesoporous Structure and Morphology of Hydroxyapatite Powders. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:418. [PMID: 36770379 PMCID: PMC9919035 DOI: 10.3390/nano13030418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 06/18/2023]
Abstract
Mesoporous hydroxyapatite (HA) materials demonstrate advantages as catalysts and as support systems for catalysis, as adsorbent materials for removing contamination from soil and water, and as nanocarriers of functional agents for bone-related therapies. The present research demonstrates the possibility of the enlargement of the Brunauer-Emmett-Teller specific surface area (SSA), pore volume, and average pore diameter via changing the synthesis medium and ripening the material in the mother solution after the precipitation processes have been completed. HA powders were investigated via chemical analysis, X-ray diffraction analysis, Fourier-transform IR spectroscopy, transmission electron microscopy (TEM), and scanning (SEM) electron microscopy. Their SSA, pore volume, and pore-size distributions were determined via low-temperature nitrogen adsorption measurements, the zeta potential was established, and electron paramagnetic resonance (EPR) spectroscopy was performed. When the materials were synthesized in water-ethanol and water-acetone media, the SSA and total pore volume were 52.1 m2g-1 and 116.4 m2g-1, and 0.231 and 0.286 cm3g-1, respectively. After ripening for 21 days, the particle morphology changed, the length/width aspect ratio decreased, and looser and smaller powder agglomerates were obtained. These changes in their characteristics led to an increase in SSA for the water and water-ethanol samples, while pore volume demonstrated a multiplied increase for all samples, reaching 0.593 cm3g-1 for the water-acetone sample.
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Affiliation(s)
- Margarita A. Goldberg
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Olga S. Antonova
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Nadezhda O. Donskaya
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Alexander S. Fomin
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Fadis F. Murzakhanov
- Institute of Physics, Kazan Federal University, 18 Kremlevskaya Str., Kazan 420008, Russia
| | - Marat R. Gafurov
- Institute of Physics, Kazan Federal University, 18 Kremlevskaya Str., Kazan 420008, Russia
| | - Anatoliy A. Konovalov
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Artem A. Kotyakov
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Alexander V. Leonov
- Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Sergey V. Smirnov
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Tatiana O. Obolkina
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Egor A. Kudryavtsev
- Joint Research Center of Belgorod State National Research University «Technology and Materials», Belgorod State National Research University, Pobedy Str., 85, Belgorod 308015, Russia
| | - Sergey M. Barinov
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Vladimir S. Komlev
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
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15
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Fluorescent H-aggregates of pure rhodamine B (RhB) in glycerol, ethylene glycol, methanol and butanol under ambient condition. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Vaz BMC, Kholany M, Pinto DCGA, Macário IPE, Veloso T, Caetano T, Pereira JL, Coutinho JAP, Ventura SPM. Recovery of bacterioruberin and proteins using aqueous solutions of surface-active compounds. RSC Adv 2022; 12:30278-30286. [PMID: 36337967 PMCID: PMC9590249 DOI: 10.1039/d2ra02581g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 10/02/2022] [Indexed: 11/30/2022] Open
Abstract
Haloarchaea microorganisms are little explored marine resources that can be a promising source of valuable compounds with unique characteristics, due to their adaptation to extreme environments. In this work, the extraction of bacterioruberin and proteins from Haloferax mediterranei ATCC 33500 was investigated using aqueous solutions of ionic liquids and surfactants, which were further compared with ethanol. Despite the good performance of ethanol in the extraction of bacterioruberin, the use of aqueous solutions of surface-active compounds allowed the simultaneous release of bacterioruberin and proteins in a multi-product process, with the non-ionic surfactants being identified as the most promising. The optimum operational conditions allowed a maximum extraction yield of 0.37 ± 0.01 mgbacterioruberin gwet biomass -1 and 352 ± 9 mgprotein gwet biomass -1 with an aqueous solution of Tween® 20 (at 182.4 mM) as the extraction solvent. In addition, high purities of bacterioruberin were obtained, after performing a simple induced precipitation using ethanol as an antisolvent to recover the proteins present in the initial extract. Finally, a step for polishing the bacterioruberin was performed, to enable solvent recycling, further closing the process to maximize its circularity.
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Affiliation(s)
- Bárbara M. C. Vaz
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago3810-193 AveiroPortugal
| | - Mariam Kholany
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago3810-193 AveiroPortugal
| | - Diana C. G. A. Pinto
- LAQV – REQUIMTE, Department of Chemistry, University of Aveiro3810-193 AveiroPortugal
| | - Inês P. E. Macário
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago3810-193 AveiroPortugal,CESAM – Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro Campus Universitário de Santiago3810-193 AveiroPortugal
| | - Telma Veloso
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago3810-193 AveiroPortugal,CESAM – Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro Campus Universitário de Santiago3810-193 AveiroPortugal
| | - Tânia Caetano
- CESAM – Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro Campus Universitário de Santiago3810-193 AveiroPortugal
| | - Joana L. Pereira
- CESAM – Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro Campus Universitário de Santiago3810-193 AveiroPortugal
| | - João A. P. Coutinho
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago3810-193 AveiroPortugal
| | - Sónia P. M. Ventura
- CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago3810-193 AveiroPortugal
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Kumar Rawat A, Chakraborty S, Kumar Mishra A, Goswami D. Achieving molecular distinction in alcohols with femtosecond thermal lens spectroscopy. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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18
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Berest VP, Borikov OY, Kravchun PG, Leontieva FS, Dielievska VY. Determination of blood group antigens using electrophoresis of erythrocytes incubated with specific antibodies. SEPARATION SCIENCE PLUS 2022. [DOI: 10.1002/sscp.202200017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | | | - Frida Solomonivna Leontieva
- Department of Molecular and Medical Biophysics Sytenko Institute of Spine and Joint Pathology Kharkiv Ukraine
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19
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Towards rapid and sustainable synthesis of biodiesel: A review of effective parameters and scale-up potential of intensification technologies for enzymatic biodiesel production. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Biswakarma D, Dey N, Bhattacharya S. Molecular design of amphiphiles for Microenvironment-Sensitive kinetically controlled gelation and their utility in probing alcohol contents. J Colloid Interface Sci 2022; 615:335-345. [DOI: 10.1016/j.jcis.2021.12.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 12/04/2021] [Accepted: 12/09/2021] [Indexed: 11/26/2022]
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21
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Arya A, Kaushik D, Almeer R, Bungau SG, Sayed AA, Abdel-Daim MM, Bhatia S, Mittal V. Application of Green Technologies in Design-Based Extraction of Celastrus paniculatus (Jyotishmati) Seeds, SEM, GC-MS Analysis, and Evaluation for Memory Enhancing Potential. Front Nutr 2022; 9:871183. [PMID: 35662919 PMCID: PMC9158750 DOI: 10.3389/fnut.2022.871183] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 03/23/2022] [Indexed: 01/09/2023] Open
Abstract
Background The Celastrus paniculatus (CP), commonly known as Jyotishmati, is considered as “elixir of life” by Indian people for the prevention or management of many ailments. The seed powder and its extract have widely used commercially for the preparation of various Ayurvedic formulations for the improvement of memory. CP seeds were generally extracted by conventional extraction methods (CEMs) which are assumed to impact environment burden and also produce low extract yield. Green extraction with possible improvement in extract yield has always been the need of hour for selected medicinal plant. Objective In the present research, we aimed to optimize the different extraction factors in microwave and ultrasound-based extraction. The various extracts obtained in conventional and green methods are also evaluated for the possible improvement in memory enhancing potential. Materials and Methods The selected medicinal herb was extracted by CEM (maceration and percolation). In green methods such microwave-assisted extraction (MAE) and ultrasound assisted-extraction (UAE), various parameters were optimized using Box-Behnken design coupled with response surface methodology. The scanning electron microscopy (SEM) and gas chromatography–mass spectroscopy (GC-MS) analyses were also done to confirm the possible improvement in concentration of plant actives. The Swiss albino mice were used to evaluate memory enhancing potential of different extracts. Results At the optimized conditions MAE and UAE the extraction yield, total phenolic content (TPC) and Total flavonoid content (TFC) are significantly improved. The GC-MS analysis further confirms the improvement in concentration of certain fatty acid esters, pilocarpine, and steroidal compounds in optimized extracts. The optimized extracts also exhibited the significant improvement in behavioral parameters, oxidative stress-induced parameters, and acetylcholinesterase inhibitory potential. Discussion and Conclusion From the results, we can say that the application of green technologies in design-based extraction of selected herb not only significantly reduces the extraction time but also improves the extract yield and concentration of plant actives. In nutshell, it can be concluded that the green approaches for extraction of seeds of Celastrus paniculatus could be scale up at a commercial level to meet the rising demand for herbal extract.
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Affiliation(s)
- Ashwani Arya
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, India
| | - Deepak Kaushik
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, India
| | - Rafa Almeer
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Simona G. Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, Oradea, Romania
| | - Amany A. Sayed
- Zoology Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Mohamed M. Abdel-Daim
- Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
- Mohamed M. Abdel-Daim
| | - Saurabh Bhatia
- Natural and Medical Sciences Research Center, University of Nizwa, Nizwa, Oman
- School of Health Science, University of Petroleum and Energy Studies, Dehradun, India
| | - Vineet Mittal
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, India
- *Correspondence: Vineet Mittal
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22
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An R, Minerick AR. Reaction-Free Concentration Gradient Generation in Spatially Nonuniform AC Electric Fields. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5977-5986. [PMID: 35507010 DOI: 10.1021/acs.langmuir.2c00013] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The ability to generate stable, spatiotemporally controllable concentration gradients is critical for both electrokinetic and biological applications such as directional wetting and chemotaxis. Electrochemical techniques for generating solution and surface gradients display benefits such as simplicity, controllability, and compatibility with automation. Here, we present an exploratory study for generating microscale spatiotemporally controllable gradients using a reaction-free electrokinetic technique in a microfluidic environment. Methanol solutions with ionic fluorescein isothiocyanate (FITC) molecules were used as an illustrative electrolyte. Spatially nonuniform alternating current (AC) electric fields were applied using hafnium dioxide (HfO2)-coated Ti/Au electrode pairs. Results from spatial and temporal analyses along with control experiments suggest that the FITC ion concentration gradient in bulk fluid (over 50 μm from the electrode) was established due to spatial variation of electric field density, and was independent of electrochemical reactions at the electrode surface. The established ion concentration gradients depended on both amplitudes and frequencies of the oscillating AC electric field. Overall, this work reports a novel approach for generating stable and spatiotemporally tunable gradients in a microfluidic chamber using a reaction-free electrochemical methodology.
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Affiliation(s)
- Ran An
- Department of Chemical Engineering, Michigan Technological University, Houghton, Michigan 49931, United States
- Mechanical and Aerospace Engineering Department, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Adrienne R Minerick
- Department of Chemical Engineering, Michigan Technological University, Houghton, Michigan 49931, United States
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23
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Kondou S, Sakashita Y, Yang X, Hashimoto K, Dokko K, Watanabe M, Ueno K. Li-Ion Transport and Solvation of a Li Salt of Weakly Coordinating Polyanions in Ethylene Carbonate/Dimethyl Carbonate Mixtures. ACS APPLIED MATERIALS & INTERFACES 2022; 14:18324-18334. [PMID: 35426656 DOI: 10.1021/acsami.1c25067] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Electrolytes with a high Li-ion transference number (tLi) have attracted significant attention for the improvement of the rapid charge-discharge performance of Li-ion batteries (LIBs). Nonaqueous polyelectrolyte solutions exhibit high tLi upon immobilization of the anion on a polymer backbone. However, the transport properties and Li-ion solvation in these media are not fully understood. Here, we investigated the Li salt of a weakly coordinating polyanion, poly[(4-styrenesulfonyl)(trifluoromethanesulfonyl)amide] (poly(LiSTFSA)), in various ethylene carbonate and dimethyl carbonate mixtures. The highest ionic conductivity was unexpectedly observed for the lowest polar mixture at the highest salt concentration despite the low dissociation degree of poly(LiSTFSA). This was attributed to a unique conduction phenomenon resulting from the faster diffusion of transiently solvated Li ions along the interconnected aggregates of polyanion chains. A Li/LiFePO4 cell using such an electrolyte demonstrated improved rate capability. These results provide insights into a design strategy of nonaqueous liquid electrolytes for LIBs.
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Affiliation(s)
- Shinji Kondou
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Yusuke Sakashita
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Xiaoxiao Yang
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Kei Hashimoto
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - Kaoru Dokko
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
- Advanced Chemical Energy Research Centre (ACERC), Institute of Advanced Sciences, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Masayoshi Watanabe
- Advanced Chemical Energy Research Centre (ACERC), Institute of Advanced Sciences, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Kazuhide Ueno
- Department of Chemistry and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
- Advanced Chemical Energy Research Centre (ACERC), Institute of Advanced Sciences, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
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24
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Expanding the Range: AuCu Metal Aerogels from H2O and EtOH. Catalysts 2022. [DOI: 10.3390/catal12040441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Due to their self-supporting and nanoparticulate structure, metal aerogels have emerged as excellent electrocatalysts, especially in the light of the shift to renewable energy cycles. While a large number of synthesis parameters have already been studied in depth, only superficial attention has been paid to the solvent. In order to investigate the influence of this parameter with respect to the gelation time, crystallinity, morphology, or porosity of metal gels, AuxCuy aerogels were prepared in water and ethanol. It was shown that although gelation in water leads to highly porous gels (60 m2g−1), a CuO phase forms during this process. The undesired oxide could be selectively removed using a post-washing step with formic acid. In contrast, the solvent change to EtOH led to a halving of the gelation time and the suppression of Cu oxidation. Thus, pure Cu aerogels were synthesized in addition to various bimetallic Au3X (X = Ni, Fe, Co) gels. The faster gelation, caused by the lower permittivity of EtOH, led to the formation of thicker gel strands, which resulted in a lower porosity of the AuxCuy aerogels. The advantage given by the solvent choice simplifies the preparation of metal aerogels and provides deeper knowledge about their gelation.
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25
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Leo A, Monteduro AG, Rizzato S, Milone A, Maruccio G. Miniaturized Sensors for Detection of Ethanol in Water Based on Electrical Impedance Spectroscopy and Resonant Perturbation Method—A Comparative Study. SENSORS 2022; 22:s22072742. [PMID: 35408357 PMCID: PMC9003094 DOI: 10.3390/s22072742] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 03/30/2022] [Accepted: 04/01/2022] [Indexed: 12/02/2022]
Abstract
The development of highly sensitive, portable and low-cost sensors for the evaluation of ethanol content in liquid is particularly important in several monitoring processes, from the food industry to the pharmaceutical industry. In this respect, we report the optimization of two sensing approaches based on electrical impedance spectroscopy (EIS) and complementary double split ring resonators (CDSRRs) for the detection of ethanol in water. Miniaturized EIS sensors were realized with interdigitated electrodes, and the ethanol sensing was carried out in liquid solutions without any functionalization of the electrodes. Impedance fitting analysis, with an equivalent circuit over a frequency range from 100 Hz to 1 MHz, was performed to estimate the electric parameters, which allowed us to evaluate the amount of ethanol in water solutions. On the other hand, complementary double split ring resonators (CDSRRs) were optimized by adjusting the device geometry to achieve higher quality factors while operating at a low fundamental frequency despite the small size (useful for compact electronic packaging). Both sensors were found to be efficient for the detection of low amounts of ethanol in water, even in the presence of salts. In particular, EIS sensors proved to be effective in performing a broadband evaluation of ethanol concentration and are convenient when low cost is the priority. On the other end, the employment of split ring resonators allowed us to achieve a very low limit of detection of 0.2 v/v%, and provides specific advantages in the case of known environments where they can enable fast real-time single-frequency measurements.
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Antisolvent Precipitation for Metal Recovery from Citric Acid Solution in Recycling of NMC Cathode Materials. METALS 2022. [DOI: 10.3390/met12040607] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Lithium-ion batteries (LIBs) are widely used everywhere today, and their recycling is very important. This paper addresses the recovery of metals from NMC111 (LiNi1/3Mn1/3Co1/3O2) cathodic materials by leaching followed by antisolvent precipitation. Ultrasound-assisted leaching of the cathodic material was performed in 1.5 mol L−1 citric acid at 50 °C and at a solid-to-liquid ratio of 20 g/L. Nickel(II), manganese(II) and cobalt(II) were precipitated from the leach liquor as citrates at 25 °C by adding an antisolvent (acetone or ethanol). No lithium(I) precipitation occurred under the experimental conditions, allowing for lithium separation. The precipitation efficiencies of manganese(II), cobalt(II) and nickel(II) decreased according to the order Mn > Co > Ni. The precipitation efficiency increased when a greater volume of antisolvent to the leachate was used. A smaller volume of acetone than ethanol was needed to reach the same precipitation efficiency in accordance with the difference in the dielectric constants of ethanol and acetone and their associated solubility constants. After adding two volumes of acetone into one volume of the leach liquor, 99.7% manganese, 97.0% cobalt and 86.9% nickel were recovered after 120 h, leaving lithium in the liquid phase. The metal citrates were converted into metal oxides by calcination at 900 °C.
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27
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Petruleviciene M, Parvin M, Savickaja I, Gece G, Naujokaitis A, Pakstas V, Pilipavicius J, Gegeckas A, Gaigalas G, Juodkazyte J. WO3 coatings for photoelectrochemical synthesis of persulfate: efficiency, stability and applicability. J Solid State Electrochem 2022. [DOI: 10.1007/s10008-022-05144-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Hojnik Podrepšek G, Knez Ž, Leitgeb M. The Synthesis of (Magnetic) Crosslinked Enzyme Aggregates With Laccase, Cellulase, β-Galactosidase and Transglutaminase. Front Bioeng Biotechnol 2022; 10:813919. [PMID: 35309987 PMCID: PMC8927696 DOI: 10.3389/fbioe.2022.813919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 01/24/2022] [Indexed: 12/16/2022] Open
Abstract
Immobilized enzymes have important aspects due to the fact that they possess higher stability, have the possibility to be easily removed from the reaction mixture, and are much easier to use when compared to free enzymes. In this research, the enzymes laccase, cellulase, β-galactosidase (β-gal), and transglutaminase (TGM) were immobilized by two different methods: crosslinked enzyme aggregates (CLEAs) and magnetic crosslinked enzyme aggregates (mCLEAs). The processes for CLEAs and mCLEAs preparation with different enzymes have been optimized, where the aim was to achieve the highest possible relative activity of the immobilized enzyme. The optimal conditions of the synthesis of CLEAs in mCLEAs are described, thus emphasizing the difference between the two types of immobilization based on different enzymes. This comparative study, which represents the synthesis of crosslinked enzyme aggregates using different enzymes, has not been performed so far. Moreover, the obtained activity of CLEAs and mCLEAs is presented, which is important for further use in different biocatalytic processes. Specifically, of a higher importance is the selection of enzymes involved in immobilization, as they belong to the three different most applicable enzymes (oxidoreductases, hydrolases, and transferases). The study confirmed that the resulting activity of the immobilized enzyme and the optimization of enzyme immobilization depended on the type of the enzyme. Moreover, the prepared CLEAs and mCLEAs were exposed to the supercritical carbon dioxide (scCO2) at different pressures to determine the effect of scCO2 on enzyme activity in immobilized form. Additionally, to demonstrate the reuse and stability of the immobilized enzyme, the stability and reusability tests of CLEAs and mCLEAs were performed. The catalytic performance of immobilized enzyme was tested, where the catalytic efficiency and long-term operational stability of mCLEAs were obviously superior to those of CLEAs. However, the higher activity observed for CLEAs compared to mCLEAs suggests a significant effect of magnetic nanoparticles in the stabilization of an enzyme crosslinked aggregate structure.
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Affiliation(s)
- Gordana Hojnik Podrepšek
- Laboratory for Separation Processes and Product Design, Faculty of Chemistry and Chemical Engineering, University of Maribor, Maribor, Slovenia
| | - Željko Knez
- Laboratory for Separation Processes and Product Design, Faculty of Chemistry and Chemical Engineering, University of Maribor, Maribor, Slovenia
- Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | - Maja Leitgeb
- Laboratory for Separation Processes and Product Design, Faculty of Chemistry and Chemical Engineering, University of Maribor, Maribor, Slovenia
- Faculty of Medicine, University of Maribor, Maribor, Slovenia
- *Correspondence: Maja Leitgeb,
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Shah P, Dev B, Deo A, Neupane BB, Bhattarai A. UV–VIS investigation of methyl red in presence of sodium dodecyl sulfate/methanol/ethanol/water system. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118119] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sofin RGS, Issac A, Al-Naabi MRS, Zar Myint MT, Htet Kyaw H, Abou-Zied OK. Emission characteristics of carbon films in comparison with solvatochromic effects of carbon nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 266:120442. [PMID: 34601368 DOI: 10.1016/j.saa.2021.120442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 09/20/2021] [Accepted: 09/23/2021] [Indexed: 06/13/2023]
Abstract
Carbon nanoparticles (CNPs) are getting wide attention due to their fluorescence and low level of toxicity compared to other semiconducting photoluminescent materials. CNPs show strong 'solvatochromism', and the emission mechanism is still under discussion. Florescent carbon in the form of films would tremendously increase its potential for applications. In this work, we report for the first time the fluorescent emission characteristics of carbon films formed by aggregation of CNPs. Films of carbon were grown on glass substrates by using a novelCold Vapour Deposition System. We have performed a detailed comparative study of the emission spectra of film and CNPs (prepared using the microwave synthesis method) in various solvents. A qualitative model based on solvatochromism of CNPs is used to understand the emission pathways in the film.
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Affiliation(s)
- R G S Sofin
- Department of Physics, College of Science, Sultan Qaboos University, Al Khoud, Muscat, Oman.
| | - Abey Issac
- Department of Physics, College of Science, Sultan Qaboos University, Al Khoud, Muscat, Oman
| | - M R S Al-Naabi
- Department of Physics, College of Science, Sultan Qaboos University, Al Khoud, Muscat, Oman
| | - M T Zar Myint
- Department of Physics, College of Science, Sultan Qaboos University, Al Khoud, Muscat, Oman
| | - H Htet Kyaw
- Nanotechnology Research Center, Sultan Qaboos University, Al Khoud, Muscat, Oman
| | - Osama K Abou-Zied
- Department of Chemistry, College of Science, Sultan Qaboos University, Al Khoud, Muscat, Oman
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High-yield recovery of highly bioactive compounds from red ginseng marc using subcritical water extraction. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.02.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Majhi SM, Ali A, Rai P, Greish YE, Alzamly A, Surya SG, Qamhieh N, Mahmoud ST. Metal-organic frameworks for advanced transducer based gas sensors: review and perspectives. NANOSCALE ADVANCES 2022; 4:697-732. [PMID: 36131834 PMCID: PMC9417493 DOI: 10.1039/d1na00798j] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 12/11/2021] [Indexed: 05/13/2023]
Abstract
The development of gas sensing devices to detect environmentally toxic, hazardous, and volatile organic compounds (VOCs) has witnessed a surge of immense interest over the past few decades, motivated mainly by the significant progress in technological advancements in the gas sensing field. A great deal of research has been dedicated to developing robust, cost-effective, and miniaturized gas sensing platforms with high efficiency. Compared to conventional metal-oxide based gas sensing materials, metal-organic frameworks (MOFs) have garnered tremendous attention in a variety of fields, including the gas sensing field, due to their fascinating features such as high adsorption sites for gas molecules, high porosity, tunable morphologies, structural diversities, and ability of room temperature (RT) sensing. This review summarizes the current advancement in various pristine MOF materials and their composites for different electrical transducer-based gas sensing applications. The review begins with a discussion on the overview of gas sensors, the significance of MOFs, and their scope in the gas sensing field. Next, gas sensing applications are divided into four categories based on different advanced transducers: chemiresistive, capacitive, quartz crystal microbalance (QCM), and organic field-effect transistor (OFET) based gas sensors. Their fundamental concepts, gas sensing ability towards various gases, sensing mechanisms, and their advantages and disadvantages are discussed. Finally, this review is concluded with a summary, existing challenges, and future perspectives.
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Affiliation(s)
- Sanjit Manohar Majhi
- Department of Physics, College of Science, United Arab Emirates University Al-Ain 15551 United Arab Emirates
| | - Ashraf Ali
- Department of Physics, College of Science, United Arab Emirates University Al-Ain 15551 United Arab Emirates
| | | | - Yaser E Greish
- Department of Chemistry, College of Science, United Arab Emirates University Al-Ain 15551 United Arab Emirates
| | - Ahmed Alzamly
- Department of Chemistry, College of Science, United Arab Emirates University Al-Ain 15551 United Arab Emirates
| | - Sandeep G Surya
- Sensors Lab, Advanced Membranes & Porous Materials Center (AMPMC), CEMSE, King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
- Sensor Group, R&D Section, Dyson Tech. Limited Malmesbury UK
| | - Naser Qamhieh
- Department of Physics, College of Science, United Arab Emirates University Al-Ain 15551 United Arab Emirates
| | - Saleh T Mahmoud
- Department of Physics, College of Science, United Arab Emirates University Al-Ain 15551 United Arab Emirates
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Multiple surface interaction mechanisms direct the anchoring, co-aggregation and formation of dual-species biofilm between Candida albicans and Helicobacter pylori. J Adv Res 2022; 35:169-185. [PMID: 35024198 PMCID: PMC8721356 DOI: 10.1016/j.jare.2021.03.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 03/23/2021] [Accepted: 03/29/2021] [Indexed: 12/20/2022] Open
Abstract
Introduction Polymicrobial biofilms have a significant impact on pathogenesis of infectious microorganisms. Many human diseases are affected by colonization of multi-species communities affecting negatively the treatments and increase the risks for the health. In particular, in the epithelium of the stomach co-existence between C. albicans and H. pylori has been described, which has been associated to a synergistic effect on ulcer pathogenesis. Objective The objective of this work was to advance in the understanding of surface interaction between H. pylori and C. albicans for the formation of polymicrobial biofilms. Methods Studies of microbial surfaces both bacterium, yeast and co-cultures of them were carried out by infrared spectroscopy, deconvolution analysis, transmission and scanning electron microscopies, and optic microscopy. Additional methods were used to contrast the results as dynamic light scattering, contact angle, agarose gel electrophoresis and gene amplification. Results Several surface interaction mechanisms promote the anchoring of H. pylori on C. albicans, cell co-aggregation, and polymicrobial biofilm formation, main identified interactions were: (i) hydrophobic interactions between non-polar peptide chains and lipid structures, characterized by θw among 84.9 ± 1.6 (γ = 22.78 mJ/m2 with 95.3 of dispersive contribution) and 76.6 ± 3.8 (γ = 17.34 mJ/m2, 40.2 of dispersive contribution) for C. albicans and H. pylori, respectively, (ii) hydrogen bonds between surface components of yeast and bacterium (e.g., -S-H⋅⋅⋅NH2- or -S-H⋅⋅⋅O[bond, double bond]CO-) and (iii) thiol-mediated surface interactions identified by displacements to lower wavenumbers (Δv = 5 cm-1). Evidence of internalization and electrostatic interactions were not evidenced. All observations were congruent with the biofilm formation, including the identification of small-size biostructures (i.e., 122-459 nm) associated with extracellular proteins, extracellular DNA, or outer membrane vesicles were observed characteristic of biofilm formation. Conclusion It is concluded that biofilm is formed by co-aggregation after anchoring of H. pylori on C. albicans. Several surface interactions were associated with the prevalence of H. pylori, the possibility to find C. albicans in the stomach epithelium infected by H. pylori, but also, strength interactions could be interfering in experimental observations associated with bacterial-DNA detection in culture mixtures.
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Fang Y, Zhang F, Farfan GA, Xu H. Low-Temperature Synthesis of Disordered Dolomite and High-Magnesium Calcite in Ethanol-Water Solutions: The Solvation Effect and Implications. ACS OMEGA 2022; 7:281-292. [PMID: 35036699 PMCID: PMC8757334 DOI: 10.1021/acsomega.1c04624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 12/03/2021] [Indexed: 06/14/2023]
Abstract
How dolomite [CaMg(CO3)2] forms is still underdetermined, despite over a century of efforts. Challenges to synthesizing dolomite at low temperatures have hindered our understanding of sedimentary dolomite formation. Unlike calcium, magnesium's high affinity toward water results in kinetic barriers from hydration shells that prevent anhydrous Ca-Mg carbonate growth. Previous synthesis studies show that adding low-dielectric-constant materials, such as dioxane, dissolved sulfide, and dissolved silica, can catalyze the formation of disordered dolomite. Also, polar hydrophilic amino acids and polysaccharides, which are very common in biomineralizing organisms, could have a positive role in stimulating Mg-rich carbonate precipitation. Here, we show that disordered dolomite and high-magnesium calcite can be precipitated at room temperature by partially replacing water with ethanol (which has a lower dielectric constant) and bypassing the hydration barrier. Increasing the ethanol volume percentage of ethanol results in higher Mg incorporation into the calcite structure. When the ethanol volume percentage increases to 75 vol %, disordered dolomite (>60 mol % MgCO3) can rapidly precipitate from a solution with [Mg2+] and [Ca2+] mimicking seawater. Thus, our results suggest that the hydration barrier is the critical kinetic inhibitor to primary dolomite precipitation. Ethanol synthesis experiments may provide insights into other materials that share similar properties to promote high-Mg calcite precipitation in sedimentary and biomineral environments.
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Affiliation(s)
- Yihang Fang
- NASA
Astrobiology Institute, Department of Geoscience, University of Wisconsin−Madison, 1215 W Dayton Street, Madison, Wisconsin 53706, United States
- Department
of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, 10th St. & Constitution Ave. NW, Washington, District of Columbia 20560, United States
| | - Fangfu Zhang
- NASA
Astrobiology Institute, Department of Geoscience, University of Wisconsin−Madison, 1215 W Dayton Street, Madison, Wisconsin 53706, United States
| | - Gabriela A. Farfan
- Department
of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, 10th St. & Constitution Ave. NW, Washington, District of Columbia 20560, United States
| | - Huifang Xu
- NASA
Astrobiology Institute, Department of Geoscience, University of Wisconsin−Madison, 1215 W Dayton Street, Madison, Wisconsin 53706, United States
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Machida S, Niwa S, Usuki S, Nakata K, Ogawa M, Yasumori A, Katsumata KI. Facile solvothermal synthesis of plate-like submicron NaNbO 3 particles. CrystEngComm 2022. [DOI: 10.1039/d2ce00665k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Platy particles of NaNbO3 were successfully prepared by a solvothermal reaction using a methanol/ethanol mixed solvent, in contrast to the formation of cubic NaNbO3 particles from methanol alone.
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Affiliation(s)
- Shingo Machida
- Department of Material Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Shoma Niwa
- Department of Material Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Sho Usuki
- Graduate School of Bio-Application and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-0012, Japan
| | - Kazuya Nakata
- Division of Sciences for Biological System, Institute of Agriculture, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-0012, Japan
| | - Makoto Ogawa
- School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, 555 Moo 1 Tumbol Payupnai, Amphoe Wangchan, Rayong 21210, Thailand
- Japan Advanced Institute of Science & Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Atsuo Yasumori
- Department of Material Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Ken-ichi Katsumata
- Department of Material Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
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36
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ESPARZA-ESPINOZA DM, SANTACRUZ-ORTEGA HDC, CHAN-HIGUERA JE, CÁRDENAS-LÓPEZ JL, BURGOS-HERNÁNDEZ A, CARBONELL-BARRACHINA ÁA, EZQUERRA-BRAUER JM. Chemical structure and antioxidant activity of cephalopod skin ommochrome pigment extracts. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.56520] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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37
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Influence of morphology on photoanodic behaviour of WO3 films in chloride and sulphate electrolytes. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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38
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Green solvent-based extraction of chlorophyll a from Nannochloropsis sp. Using 2,3-butanediol. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Jakubowska E, Milanowski B, Lulek J. A Systematic Approach to the Development of Cilostazol Nanosuspension by Liquid Antisolvent Precipitation (LASP) and Its Combination with Ultrasound. Int J Mol Sci 2021; 22:ijms222212406. [PMID: 34830298 PMCID: PMC8619020 DOI: 10.3390/ijms222212406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/05/2021] [Accepted: 11/12/2021] [Indexed: 12/14/2022] Open
Abstract
Nanosizing is an approach to improve the dissolution rate of poorly soluble drugs. The first aim of this work was to develop nanosuspension of cilostazol with liquid antisolvent precipitation (LASP) and its combination with ultrasound. Second, to systematically study the effect of bottom-up processing factors on precipitated particles’ size and identify the optimal settings for the best reduction. After solvent and stabilizer screening, in-depth process characterization and optimization was performed using Design of Experiments. The work discusses the influence of critical factors found with statistical analysis: feed concentration, stabilizer amount, stirring speed and ultrasound energy governed by time and amplitude. LASP alone only generated particle size of a few microns, but combination with ultrasound was successful in nanosizing (d10 = 0.06, d50 = 0.33, d90 = 1.45 µm). Micro- and nanosuspension’s stability, particle morphology and solid state were studied. Nanosuspension displayed higher apparent solubility than equilibrium and superior dissolution rate over coarse cilostazol and microsuspension. A bottom-up method of precipitation-sonication was demonstrated to be a successful approach to improve the dissolution characteristics of poorly soluble, BCS class II drug cilostazol by reducing its particle size below micron scale, while retaining nanosuspension stability and unchanged crystalline form.
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40
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Sobuj MKA, Islam MA, Islam MS, Islam MM, Mahmud Y, Rafiquzzaman SM. Effect of solvents on bioactive compounds and antioxidant activity of Padina tetrastromatica and Gracilaria tenuistipitata seaweeds collected from Bangladesh. Sci Rep 2021; 11:19082. [PMID: 34580350 PMCID: PMC8476583 DOI: 10.1038/s41598-021-98461-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 08/10/2021] [Indexed: 11/30/2022] Open
Abstract
Seaweeds are now recognized as a treasure of bioactive compounds. However, the bioactivity of seaweed originating in Bangladesh is still unexplored. So, this study was designed to explore the secondary metabolites and antioxidant activities of solvent extracts of Padina tetrastromatica and Gracilaria tenuistipitata. Phytochemical screening and FTIR spectra confirm the diverse type of bioactive compounds. Antioxidant activity of extracts were evaluated by 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2, 2-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), reducing power (RP), phosphomolybdenum, hydrogen peroxide and nitric oxide (NO) scavenging assays. Here, methanolic extract of P. tetrastromatica showed highest amount of total phenolic content (85.61 mg of GA/g), total flavonoid content (41.77 mg of quercetin/g), DPPH (77.07%), ABTS (77.65%), RP (53.24 mg AAE/g), phosphomolybdenum (31.58 mg AAE/g), hydrogen peroxide (67.89%) and NO (70.64%) assays compared to its methanolic extracts of G. tenuistipitata. This study concluded that methanol as a solvent extract of brown seaweed (P. tetrastromatica) exhibited bioactivity and antioxidant potentiality which will be useful for pharmacological as well as in functional food application.
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Affiliation(s)
- Mohammad Khairul Alam Sobuj
- Marine Fisheries and Technology Station, Bangladesh Fisheries Research Institute, Cox's Bazar, 4700, Bangladesh
| | - Md Ariful Islam
- Department of Fisheries Biology and Aquatic Environment, BSMRAU, Gazipur, 1706, Bangladesh
| | - Md Shoebul Islam
- Department of Fisheries Biology and Aquatic Environment, BSMRAU, Gazipur, 1706, Bangladesh
| | - Md Mohidul Islam
- Marine Fisheries and Technology Station, Bangladesh Fisheries Research Institute, Cox's Bazar, 4700, Bangladesh
| | - Yahia Mahmud
- Bangladesh Fisheries Research Institute, Mymensingh, 2201, Bangladesh
| | - S M Rafiquzzaman
- Department of Fisheries Biology and Aquatic Environment, BSMRAU, Gazipur, 1706, Bangladesh.
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41
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The effect of different pressurized fluids on the extraction of anthocyanins and total phenolics from cranberry pomace. J Supercrit Fluids 2021. [DOI: 10.1016/j.supflu.2021.105279] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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42
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Seah GL, Wang L, Tan LF, Tipjanrawee C, Sasangka WA, Usadi AK, McConnachie JM, Tan KW. Ordered Mesoporous Alumina with Tunable Morphologies and Pore Sizes for CO 2 Capture and Dye Separation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:36117-36129. [PMID: 34288649 DOI: 10.1021/acsami.1c06151] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We describe a versatile and scalable strategy toward long-range and periodically ordered mesoporous alumina (Al2O3) structures by evaporation-induced self-assembly of a structure-directing ABA triblock copolymer (F127) mixed with aluminum tri-sec-butoxide-derived sol additive. We found that the separate preparation of the alkoxide sol-gel reaction before mixing with the block copolymer enabled access to a relatively unexplored parameter space of copolymer-to-additive composition, acid-to-metal molar ratio, and solvent, yielding ordered mesophases of two-dimensional (2D) lamellar, hexagonal cylinder, and 3D cage-like cubic lattices, as well as multiscale hierarchical ordered structures from spinodal decomposition-induced macro- and mesophase separation. Thermal annealing in air at 900 °C yielded well-ordered mesoporous crystalline γ-Al2O3 structures and hierarchically porous γ-Al2O3 with 3D interconnected macroscale and ordered mesoscale pore networks. The ordered Al2O3 structures exhibited tunable pore sizes in three different length scales, <2 nm (micropore), 2-11 nm (mesopore), and 1-5 μm (macropore), as well as high surface areas and pore volumes of up to 305 m2/g and 0.33 cm3/g, respectively. Moreover, the resultant mesoporous Al2O3 demonstrated enhanced adsorption capacities of carbon dioxide and Congo red dye. Such hierarchically ordered mesoporous Al2O3 are well-suited for green environmental solutions and urban sustainability applications, for example, high-temperature solid adsorbents and catalyst supports for carbon dioxide sequestration, fuel cells, and wastewater separation treatments.
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Affiliation(s)
- Geok Leng Seah
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore
| | - Leyan Wang
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore
| | - Li Fang Tan
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore
| | - Chanikarn Tipjanrawee
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore
| | - Wardhana A Sasangka
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore
| | - Adam K Usadi
- ExxonMobil Research and Engineering Company, Annandale, New Jersey 08801, United States
| | | | - Kwan W Tan
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore
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Mei Y, Deskins NA. An evaluation of solvent effects and ethanol oxidation. Phys Chem Chem Phys 2021; 23:16180-16192. [PMID: 34297022 DOI: 10.1039/d1cp00630d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding liquid-metal interfaces in catalysis is important, as the liquid can speed up surface reactions, increase the selectivity of products, and open up new favorable reaction pathways. In this work we modeled using density functional theory various steps in ethanol oxidation/decomposition over Rh(111). We considered implicit (continuum), explicit, and hybrid (implicit combined with explicit) solvation approaches, as well as two solvents, water and ethanol. We focused on modeling adsorption steps, as well as C-C/C-H bond scission and C-O bond formation reactions. Implicit solvation had very little effect on adsorption and reaction free energies. However, using the explicit and hybrid models, some free energies changed significantly. Furthermore, ethanol solvent had a more considerable impact than water solvent. We observed that preferred reaction pathways for C-C scission changed depending on the solvation model and solvent choice (ethanol or water). We also applied the bond-additivity solvation method to calculate heats of adsorption. Heats of adsorption and reaction using the bond-additivity model followed the same trends as the other solvation models, but were ∼1.1 eV more endothermic. Our work highlights how different solvation approaches can influence analysis of the oxidation/decomposition of organic surface species.
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Affiliation(s)
- Yuhan Mei
- Department of Chemical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, Massachusetts 01609, USA.
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44
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Wang W, Ning M, Fan Y, Liu X, Chen G, Liu Y. Comparison of physicochemical and umami characterization of aqueous and ethanolic Takifugu obscurus muscle extracts. Food Chem Toxicol 2021; 154:112317. [PMID: 34087407 DOI: 10.1016/j.fct.2021.112317] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/22/2021] [Accepted: 05/29/2021] [Indexed: 02/07/2023]
Abstract
Most umami substances were developed in aqueous extracts. In this study, we compared the molecular weight distributions and sensory characteristics of ethanol and aqueous Takifugu obscurus muscle extracts, and assessed their taste-related metabolites and peptide profile (<3 kDa) using nuclear magnetic resonance and nano liquid chromatography-mass spectrometry. The potential antioxidant peptide in ethanolic fraction was screened using Peptide Ranker, BIOPEP and quantum chemical simulations. The results indicated that 60% ethanolic extract fraction (60%-F) had the highest umami intensity and more palatable overall taste among all pufferfish extracts. It can be caused by more umami enhancing components such as Asp, Asn, Ala and 5'-AMP, and considerable umami-potential smaller peptides in 60%-F. 60%-F also showed an antioxidant activity, and several antioxidant peptides was screened. The present study indicated the relationship between extract solution and taste characterization, which provided more possibility for the exploitation of umami substances and screening potential activity peptides.
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Affiliation(s)
- Wenli Wang
- Department of Food Science & Technology, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Menghua Ning
- Department of Food Science & Technology, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yuxia Fan
- Department of Food Science & Technology, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xia Liu
- Department of Resources & Environment, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Gaole Chen
- Department of Food Science & Technology, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yuan Liu
- Department of Food Science & Technology, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
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Swathy TS, Jinish Antony M, George N. Active Solvent Hydrogen-Enhanced p-Nitrophenol Reduction Using Heterogeneous Silver Nanocatalysts@Surface-Functionalized Multiwalled Carbon Nanotubes. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- T. S. Swathy
- Research and P.G. Department of Chemistry, Centre for Sustainable Chemistry, St. Thomas College (Autonomous Under University of Calicut), Thrissur, Kerala 680 001, India
| | - M. Jinish Antony
- Research and P.G. Department of Chemistry, Centre for Sustainable Chemistry, St. Thomas College (Autonomous Under University of Calicut), Thrissur, Kerala 680 001, India
| | - Naijil George
- Department of Biotechnology, St. Joseph’s College (Autonomous Under University of Calicut), Irinjalakuda, Thrissur, Kerala 680 121, India
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46
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Li F, Zhu Y, Li S, Wang P, Zhang R, Tang J, Koral T, Jiao Y. A strategy for improving the uniformity of radio frequency tempering for frozen beef with cuboid and step shapes. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107719] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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47
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de Menezes BB, Frescura LM, Duarte R, Villetti MA, da Rosa MB. A critical examination of the DPPH method: Mistakes and inconsistencies in stoichiometry and IC 50 determination by UV-Vis spectroscopy. Anal Chim Acta 2021; 1157:338398. [PMID: 33832588 DOI: 10.1016/j.aca.2021.338398] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 03/04/2021] [Accepted: 03/07/2021] [Indexed: 10/21/2022]
Abstract
The DPPH method has been reported with misconceptions in a large number of studies, thus precluding comparison of results. Attention is drawn to a common mistake in the unit used to express the IC50 of ascorbic acid and other antioxidant substances. Concentration of the antioxidant is widely misused with a total disregard for the DPPH• concentration, while the molar ratio of antioxidant/DPPH• would be the correct choice. Data from 26 studies with widely varying IC50 values were renormalized according to reaction stoichiometry, resulting in values which are more coherent and closer to the ideal one of 0.25 for at least 15 of them. In addition, the model which is currently being used to calculate the DPPH• concentration can lead to an overestimation of around 7%, as it does not take into account the small contribution of the reaction product. In view of that, we present a mathematical model to correct the overestimation of the DPPH• concentration.
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Affiliation(s)
- Bryan Brummelhaus de Menezes
- Federal University of Santa Maria - UFSM, Department of Chemistry, Av. Roraima, 1000, 97105-900, Santa Maria, RS, Brazil
| | - Lucas Mironuk Frescura
- Federal University of Santa Maria - UFSM, Department of Chemistry, Av. Roraima, 1000, 97105-900, Santa Maria, RS, Brazil
| | - Rafael Duarte
- Federal University of Santa Maria - UFSM, Department of Chemistry, Av. Roraima, 1000, 97105-900, Santa Maria, RS, Brazil
| | - Marcos Antonio Villetti
- Federal University of Santa Maria - UFSM, Department of Physics, Av. Roraima, 1000, 97105-900, Santa Maria, RS, Brazil
| | - Marcelo Barcellos da Rosa
- Federal University of Santa Maria - UFSM, Department of Chemistry, Av. Roraima, 1000, 97105-900, Santa Maria, RS, Brazil.
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48
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Hao J, Yuan L, Ye C, Chao D, Davey K, Guo Z, Qiao SZ. Boosting Zinc Electrode Reversibility in Aqueous Electrolytes by Using Low-Cost Antisolvents. Angew Chem Int Ed Engl 2021; 60:7366-7375. [PMID: 33440043 DOI: 10.1002/anie.202016531] [Citation(s) in RCA: 214] [Impact Index Per Article: 71.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Indexed: 01/22/2023]
Abstract
Antisolvent addition has been widely studied in crystallization in the pharmaceutical industries by breaking the solvation balance of the original solution. Here we report a similar antisolvent strategy to boost Zn reversibility via regulation of the electrolyte on a molecular level. By adding for example methanol into ZnSO4 electrolyte, the free water and coordinated water in Zn2+ solvation sheath gradually interact with the antisolvent, which minimizes water activity and weakens Zn2+ solvation. Concomitantly, dendrite-free Zn deposition occurs via change in the deposition orientation, as evidenced by in situ optical microscopy. Zn reversibility is significantly boosted in antisolvent electrolyte of 50 % methanol by volume (Anti-M-50 %) even under harsh environments of -20 °C and 60 °C. Additionally, the suppressed side reactions and dendrite-free Zn plating/stripping in Anti-M-50 % electrolyte significantly enhance performance of Zn/polyaniline coin and pouch cells. We demonstrate this low-cost strategy can be readily generalized to other solvents, indicating its practical universality. Results will be of immediate interest and benefit to a range of researchers in electrochemistry and energy storage.
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Affiliation(s)
- Junnan Hao
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Libei Yuan
- Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Chao Ye
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Dongliang Chao
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Kenneth Davey
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Zaiping Guo
- Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Shi-Zhang Qiao
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
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49
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Hao J, Yuan L, Ye C, Chao D, Davey K, Guo Z, Qiao S. Boosting Zinc Electrode Reversibility in Aqueous Electrolytes by Using Low‐Cost Antisolvents. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016531] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Junnan Hao
- School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
| | - Libei Yuan
- Institute for Superconducting and Electronic Materials Australian Institute for Innovative Materials University of Wollongong Wollongong NSW 2522 Australia
| | - Chao Ye
- School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
| | - Dongliang Chao
- School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
| | - Kenneth Davey
- School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
| | - Zaiping Guo
- Institute for Superconducting and Electronic Materials Australian Institute for Innovative Materials University of Wollongong Wollongong NSW 2522 Australia
| | - Shi‐Zhang Qiao
- School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
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50
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Antineoplastic behavior of polydopamine nanoparticles prepared in different water/alcohol media. Colloids Surf B Biointerfaces 2020; 199:111506. [PMID: 33338881 DOI: 10.1016/j.colsurfb.2020.111506] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 11/08/2020] [Accepted: 11/30/2020] [Indexed: 12/11/2022]
Abstract
Polydopamine nanoparticles (PD NPs) have been synthesized in the present work through the oxidative polymerization of dopamine in aqueous media containing five different types of alcohol in a constant solvent volume ratio. We have shown that the type of alcohol, along with the ammonium hydroxide concentration used in the synthesis process, conditions particle size. Additionally, it has been found that the type of alcohol employed influences the well-known capacity of polydopamine nanoparticles to adsorb iron. As a consequence, since a ferroptosis-like mechanism may account for the cytotoxicity of these nanoparticles, the type of alcohol could also have a determining role in their antineoplastic activity. Here, the existence of a correlation between the ability of polydopamine nanoparticles to load Fe3+ and their toxic effect on breast cancer cells has been proven. For instance, nanoparticles synthesized using 2-propanol adsorbed more Fe3+ and had the greatest capacity to reduce breast tumor cell viability. Moreover, none of the nanoparticle synthesized with the different alcohols significantly decreased normal cell survival. Cancer cells present greater iron-dependence than healthy cells and this fact may explain why polydopamine nanoparticles toxicity, in which Fenton chemistry could be implicated, seems tumor-specific.
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