Nanomaterials
·
2019
·Vol. 9
·期 5
·774
·
IF 4.034
Chihao Lin,Dejian Shi,Zhentao Wu,Lingfeng Zhang,Zhicai Zhai,Yingsen Fang,Ping Sun,Ruirui Han,Jiaqiang Wu,Hui Liu
In this study, a bimetallic oxide catalyst of cobalt-manganese (CoMn2O4) was synthesized using the sol-gel method, and it was then characterized using a variety of techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) spectroscopy, X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption–desorption isotherms. The obtained novel catalyst, i.e., CoMn2O4, was then used as an activator of peroxymonosulfate (PMS) for the catalytic degradation of a commonly-used UV filter, 2-phenylbenzimidazole-5-sulfonic acid (PBSA) in water. The effects of various factors (e.g., catalyst dosage, PMS concentration, reaction temperature, and pH) in the process were also evaluated. Chemical scavengers and electron paramagnetic resonance (EPR) tests showed that the•OH and SO4•−were the main reactive oxygen species. Furthermore, this study showed that CoMn2O4is a promising catalyst for activating PMS to degrade the UV filters.Keywords:CoMn2O4;catalytic degradation;peroxymonosulfate;UV filters;2-phenylbenzimidazole-5-sulfonic acid (PBSA)
研究领域:
环境科学
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催化化学
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DOI
PubMed
高影响因子
Food Packaging and Shelf Life
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2019
·
IF 3.63
Chunxiang Yang,Haibing Tang,Yifen Wang,Yuan Liu,Jing Wang,Wenzheng Shi,Li Li
Due to negative impacts of non-biodegradable plastic films to the environment, biodegradable packaging materials have become a research hotspot. Novel biodegradable active films based on polylactic acid (PLA) blended with poly (butylene succinate adipate) (PBSA), carvacrol, and thymol were developed. Mechanical properties of films including tensile strength (TS), elongation at break (EAB), optical properties including transmittance (T) and haze (H), barrier properties including water vapor permeability (WVP), oxygen transmission rate (OTR), and releasing rates of active compound from films and antioxidant efficiency of films were investigated to evaluate the films. A shelf life test of salmon slices packed with PLA-PBSA bags (with and without active compound) were carried out. The results showed that PLA-PBSA based films had better mechanical properties than those of similar biodegradable films such as PLA-PHB, and even better than EVOH in terms of two major mechanical properties, TS and EAB. As to active properties, the results also showed a high release of active compound and high antioxidant efficiency of PLA-PBSA films with either carvacrol or thymol. The shelf life test of salmon slices showed the antibacterial and antioxidant properties of the PLA–PBSA films were enhanced when the active compound were released into salmon slices at equilibrium. As a result, spoilage and deterioration of the salmon slices were reduced, which extended the shelf life of salmon slices by 3–4 days during cold storage. Thus, the biodegradable PLA–PBSA films with active compound could prolong shelf life of fisheries products in particular, and food in general.
研究领域:
食品科学
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材料科学
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环境科学
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DOI
高影响因子
LUMINESCENCE
·
2026
·Vol. 41
·期 7
·e70572
·
IF 2.8
Yuan Li,Suqing Wang,Yutong Du,Di Lian,Jingjing Cui,Xue Zhang,Zihan Qu,Li Li
In this work, the inhibition effects of oroxyloside on two α -amylase from porcine pancreas (PPA) and Bacillus subtilis (BSA), as well as two α -glucosidase from Aspergillus niger (ANG) and Saccharomyces cerevisiae (SCG), were systematically compared using spectral analysis, computer simulation, and mm-PBSA calculation. Oroxyloside displayed the most potent inhibitory activity on ANG, followed by PPA, BSA, and SCG. Meanwhile, oroxyloside exhibited a mixed-type inhibition against BSA, PPA, ANG, and SCG. Oroxyloside interacted with enzyme residues mainly by hydrogen bonds and van der Waals forces, leading to the changes in the microenvironment and the secondary structure changes of enzymes, and ultimately exerting inhibitory effects. The optimal binding modes and the stability of four complexes were predicted by computer simulation. The free energy decomposition of critical residues was calculated using mm-PBSA. Oroxyloside was identified as a potential inhibitor of four enzymes, exhibiting significantly stronger inhibitory activity than acarbose.
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DOI
PubMed
高影响因子
International Journal of Environmental Research and Public Health
·
2020
·Vol. 17
·期 2
·651
·
IF 2.849
Xinxin Huang,Yuanyuan Li,Tantan Wang,Hui Liu,Jiaqi Shi,Xuesheng Zhang
Organic UV filters are a kind of emerging pollutants, which have been widely used in personal care products (PCPs). This study evaluated the effects of benzophenone-4 (BP-4), 4-aminobenzoic acid (PABA), and 2-phenylbenzimidazole-5-sulfonic acid (PBSA) on the selected indices of antioxidative responses in zebrafish (Danio rerio) liver. Zebrafish were exposed to two different doses (i.e., 0.5 and 5 mg L−1) of semi-static water with three individual compounds. Liver samples were collected on 7 and 14 days to analyze biochemical indicators, including superoxide dismutase (SOD), glutathione S-transferase (GST), reduced glutathione (GSH), and malondialdehyde (MDA). Oxidative stress occurred in zebrafish liver with significantly changed indicators during the whole exposure period. Different experimental groups could induce or inhibit the activity of antioxidant enzymes with varying degrees. With a prolonged exposure time and increased exposure dose, the hepatic lipid peroxidation was also obviously observed. Moreover, the toxicity order of three organic UV filters was analyzed using the integrated biomarker response (IBR) index and the results indicate that exposure to PABA for 7 days at 0.5 mg L−1and PBSA for 7 days at 5 mg L−1induced the most severe oxidative stress in the liver of zebrafish.Keywords:organic UV filters;oxidative stress;lipid peroxidation;integrated biomarker response;zebrafish
研究领域:
环境科学
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毒理学
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DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
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2025
·
IF 7.4
Wentao Guo,Jie Yuan,Xiulu Gao,Zhirui Wang,Meixia Zhang,Ling Zhao,Dongdong Hu
Biodegradable poly(butylene succinate -co- butylene adipate) (PBSA) was synthesized with varying adipic acid (AA) content via in-situ polymerization to systematically investigate the influence of chain segment composition on molecular structure, mechanical properties, foaming performance, and degradation behavior. Increased AA content enhances molecular chain flexibility, reduces crystallinity from 26.73% to 11.52%, and lowers the glass transition temperature ( T g ) from −37.0 ℃ to −51.2 ℃, thereby broadening the application window of PBSA in low-temperature environments. The incorporation of AA also widens the temperature window of supercritical CO₂ foaming, increasing the toughness and CO₂ solubility and reducing the strength of PBSA. Therefore, moderate incorporation of flexible segments can optimize the foaming properties of PBSA. PBSA foam with 40% AA content (A40) achieves a maximum initial expansion ratio of 55.3 and stable expansion ratio of 21.7. The degradation rate of PBSA foams was enhanced and the low-temperature applicability was broadened with increasing AA content. A40 foam(8 times) demonstrates superior compressibility at −45 ℃ and accelerate biodegradation (achieving 43.9% weight loss in soil within 8 weeks). This work highlights the potential of monomer ratio modulation in biodegradable bio-based polyesters to tailor foam properties for specific environmental and functional requirements, providing critical insights into the development of sustainable cushioning materials with tunable temperature applicability.
研究领域:
高分子科学
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材料工程
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环境科学
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化学工程
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生物降解材料
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Fuqiang Liang,Keyu Meng,Xinran Pu,Yubo Cao,Yumeng Shi,Jiayi Shi
This study investigated the molecular mechanism underlying the binding interaction between apigenin (API) and α-glucosidase (α-glu) by a combination of experimental techniques and computational simulation strategies. The spontaneously formation of stable API-α-glu complex was mainly driven by hydrogen bonds and hydrophobic forces, leading to a static fluorescence quenching of α-glu. The binding of API induced secondary structure and conformation changes of α-glu, decreasing the surface hydrophobicity of protein. Computational simulation results demonstrated that API could bind into the active cavity of α-glu via its interaction with active residues at the binding site. The important roles of key residues responsible for the binding stability and affinity between API and α-glu were further revealed by MM/PBSA results. In addition, it can be found that the entrance of active site tended to close after API binding as a result of its interaction with gate keeping residues. Furthermore, the structural basis for the binding interaction behavior of API was revealed and visualized by weak interaction analysis. The findings of our study revealed atomic-level mechanism of the interaction between API, which might shed light on the development of better inhibitors.
研究领域:
药理学
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生物化学
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分子生物学
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计算化学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）