CHEMICAL ENGINEERING JOURNAL
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2015
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IF 4.321
Ziwei Zhang,Fang Wang,Weiben Yang,Zhen Yang,Aimin Li
In this study, a novel macroporous amination resin (named as GMDA) with the matrix of divinylbenzene and glycidyl methacrylate was synthesized and utilized to remove 8-amino-1-naphthol-3,6-disulfonic acid (H-acid) from water. The adsorption behaviors of the synthetic resin were studied systematically and compared with three commercial resins (the hypercrosslinked resin NDA-88, the anion-exchange resin D-301, and the macroporous resin XAD-4) in terms of adsorption capacity, equilibrium time, isotherm adsorption , the effect of existing inorganic ions and regeneration properties. The characteristic methods of BET surface area, pore size distribution, SEM , FTIR , XPS and Zeta potential were investigated to analyze the resins and adsorption process . The GMDA resin has wider pore diameter than the NDA-88 resin to attract H-acid more quickly with higher adsorption amounts; the larger BET surface area of the GMDA resin ensures more binding sites than the D-301 resin in the adsorption process; the functional groups on the surface of the GMDA resin is more effective than the hydrophobic matrix of the resin XAD-4 in the removal of H-acid. Especially, the regeneration and dynamic experiments indicate the anti-fouling performance of GMDA resin is much better than the others. This research not only provides guidance for understanding the adsorption mechanism of H-acid onto the four resins, but also gives theoretical basis for the design of resin structure according to the targeted contaminants.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ELECTROPHORESIS
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2022
·Vol. 43
·期 11
·1148-1160
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IF 3.595
Yaqi Yao,Shanshan Wang,Rui Zhou,Ye Shang,Kunze Du,Jun He,Jin Li,Lin Ma,Yanxu Chang
A novel method of reverse migration micellar electrokinetic chromatography (RM-MEKC) using 2,2′-azinobis-(3-ethylbenzthiazoline-6-sulphonate) as oxidation-free radical was developed to screen the major antioxidants from Sanyetangzhiqing (SYTZQ), which is a new patent drug for diabetes. For simultaneous detection and separation of 2,2′-bis (3-ethylbenzothiazoline-6-sulfonic acid) ammonium salt (ABTS + ) and chemical components of SYTZQ, the key factors were optimized and the method was validated under the optimal conditions. All the relative standard deviations of recovery, precision, and stability were below 6.6%. Based on these, the RM-MEKC method has been successfully used to screen the main antioxidants from SYTZQ tablets. Five compounds, including rosmarinic acid, salvianolic acid B, lithospermic acid, hyperoside, and isoquercetin, were separated and identified as the major antioxidants. There was a linear relationship with correlation coefficient of 0.923 between the total amount of major antioxidants and total antioxidative activity of SYTZQ. Consequently, these five ingredients could be selected as combinatorial markers for quality control of SYTZQ, and the established method was concluded to be a simple, reliable, and powerful tool to screen and quantify active compounds for quality evaluation of SYTZQ.
研究领域:
分析化学
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药学
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生物技术
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2020
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IF 4.389
Ping Xue,Xueping Liu,Yaohua Gu,Weiwei Zhang,Lan Ma,Rui Li
A heterogeneous bead-shaped biocatalyst was prepared by assembling co-immobilization of encapsulating mediator 2,2′-Azino-bis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) into the functionalized calcium alginate composite beads by grafting glycidyl methacrylate and dopamine and then immobilizing laccase covalently onto beads. The enzyme-catalyzed degradation for acridine in water was systematically studied for the first time, and it was found that the co-immobilized laccase-mediator system has excellent capability to degrade acridine in water. Treating 30 mg/L acridine aqueous solution for 8 h with the biocatalyst, the degradation rate of acridine reached 100 %. In contrast, the degradation of acridine by free laccase under the same treatment conditions was low and difficult to observe. Its outstanding catalytic activity could be attributed to the effective assembling co-immobilization of laccase and the mediator so that the catalytic activity of the enzyme and the synergistic promoting action of the mediator have been given full play in the process of acridine degradation. The beaded biocatalyst about 3 mm in diameter could be easily recovered and reused several times without obvious deterioration in catalytic activity. Furthermore, according to the test results of electron paramagnetic resonance and the identified intermediates, the possible biocatalytic mechanism and reaction pathways for acridine degradation have been proposed.
研究领域:
环境科学
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生物技术
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催化化学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Linlin Zhang,Jie Wang,Chenglong Zhao,Feijin Zhou,Cheng Yao,Chan Song
The nanozymes-based sensing platforms have been attracted in recent years due to their outstanding performances in the practical applications. In this work, the magnetic Fe nanoparticles (NPs) with peroxidase-like activity was developed for the fast detection of glutathione (GSH). The Fe NPs were facilely prepared through the reduction of iron trichlorrde hexahydrate (FeCl 3 ‧6H 2 O) by sodium borohydride (NaBH 4 ) at room temperature , exhibiting a merit of simplicity. Significantly, the achieved Fe NPs have high peroxidase-like catalytic activity . At the room temperature, the colorimetric substrates such as 3,3′,5,5′-tetramethylbenzidine (TMB) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) can be rapidly oxidized by Fe NPs with the help of H 2 O 2 . After incubated for just 30 s, the catalytic system could achieve a colored solution. Thus, the Fe NPs-based sensing systems can be employed in the development of the colorimetric biosensors with the naked-eye detection.
研究领域:
纳米技术
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生物化学
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分析化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Xinzhou Huang,Long Ren,Chunyun Jiang,Xiangxiang Han,Xiaoshuang Yin,Ying Liu,Wenzhong Yang,Yun Chen
Photoelectrochemical enzymatic biofuel cell (PEBFC) shows the obvious advantages in the renewable energy conversion field. However, because of the low utilization efficiency of solar energy and the unendurable power output, PEBFC cannot satisfy the demand of practical applications. Herein, a novel PEBFC prototype is designed. Taking a TiO 2 nanorod arrays (NRAs) decorated graphene–cadmium sulfide quantum dots (GR–CdS QDs) hybrid at fluorine-doped tin oxide (FTO) glass electrode as the photoanode, it can catalyze the oxidation of ascorbic acid (AA) effectively, with the oxidation current being as high as –137.8 μA cm −2 , and the anodic open circuit potential ( E a O C P ) reaching approximately –0.52 V; using a laccase–bound three–dimensional graphene–single walled carbon nanotubes (3D GR–SWCNTs–laccase) hybrid electrode as the biocathode, along with 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), the biocathode can catalyze the reduction of oxygen remarkably, and the cathodic open circuit potential ( E c OCP ) is as high as 0.54 V. Under optimal conditions, such PEBFC can obtain sufficient high open circuit voltage (V oc ) of 1.05 V and maximum power output density (P max ) of 227.5 μW cm −2 , respectively. Two PEBFCs connected in series can light a red light-emitting diode (LED) successfully.
研究领域:
可再生能源
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电化学
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纳米技术
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生物技术
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2019
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IF 4.784
Bilal Muhammad Khan,Hua-Mai Qiu,Shu-Ying Xu,Yang Liu,Kit-Leong Cheong
This study was designed to fully characterize Porphyra haitanensis polysaccharides, and to evaluate their antioxidant activity. The polysaccharides primarily contained galactose and 3,6-anhydrogalactose in a molar ratio of 1.2:1.0, respectively and sulfate content about 3.8%. The molecular weight of polysaccharides is 2.5 × 10 5 Da. Scanning electron microscopy and atomic force microscopy of the polysaccharides pointed towards an irregular network with more or less hexagonal and a few rectangular pores. The chemical structure was confirmed through Fourier transform infrared spectroscopy, and 1D and 2D nuclear magnetic resonance structural characterization wherein → 4–3,6-anhydro-α-L-galactopyranose-(1 → 3)-β-D-galactopyranose segments. The extracted polysaccharides revealed relatively high 2, 2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid radical scavenging activity (53.16% at 2 mg/mL), moderate 2,2-diphenyl-1-picrylhydrazyl radical scavenging efficacy (34.63% at 2 mg/mL), and low hydroxyl radical scavenging potential (23.80% at 2 mg/mL). Further purification of these polysaccharides, hence, is advised for their potential role as antioxidants in the food, pharmaceutical and cosmeceutical industry.
研究领域:
海洋生物学
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植物化学
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食品科学
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药学
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化妆品科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）