COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Feng Cao,Meiyu Zheng,Wenjuan Zhang,Yangguang Wang,Shengmin Lu
Naringin (NR) has the drawbacks of poor water solubility and low bioavailability, which restricts its applications. The NR-loaded pectin-alginate nanoparticles (PANPs) were prepared by the ion gel method. When the complex polysaccharide concentration, mass ratio of pectin to sodium alginate , molar concentration of CaCl 2 and NR addition were 1 %, 2:1, 0.03 mol/L and 5 mg/mL, respectively, the encapsulation efficiency of PANPs to NR was highest with a value of 79.23 %. Furthermore, multi-factor stability investigation revealed that the NR-loaded PANPs suspension was stable at pH 3–8, NaCl concentration of less than 400 mmol/L, and temperature of less than 75 °C. The NR-loaded PANPs suspension maintained good stability during a storage period of 30 days, and the retention rate of PANPs to NR was as high as 82.51 % at the 30th day, indicating that PANPs had a positive protective role on NR over a longer storage period. The findings might provide a theoretical basis and practical guidance for further exploiting naringin as a functional food ingredient using composite hydrogel encapsulation.
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Journal of Water Process Engineering
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2024
·
IF 6.3
Yulin Yuan,Qiongfang Wang,Xin Zhang,Lei Dong,Cheng Peng,Min Zhang,Pinhua Rao,Naiyun Gao,Jing Deng
The residues of sulfonamide antibiotics in the environment would pose a threat to aquatic ecosystem and human health. In this study, β-FeOOH@ZnO was synthesized by using a hydrothermal method to activate peroxymonosulfate (PMS) for the degradation of the typical sulfonamide antibiotic sulfadimethoxine (SDM), in which 98.89 % of SDM was removed in 60 min with activating 0.5 mM PMS. Moreover, the influence of catalyst dosage, PMS dosage, solution pH and anions on the degradation efficiency of SDM was investigated in the system. The results indicated that the material exhibited good applicability and β-FeOOH@ZnO performed well in a wide pH range (5–11). 1 O 2 was the major reactive oxygen species (ROS) rather than ˙ OH , S O 4 ˙ − and O 2 ˙ − through free radical quenching experiments and electron paramagnetic resonance experiments (EPR). Furthermore, the mechanism was found that ZnO could enhance the electron transfer pathway of β-FeOOH, which accelerated the degradation of SDM. Possible intermediate products and degradation pathways were proposed through LC-MS analysis. In summary, this study offered a new strategy for the efficient degradation of sulfonamide antibiotics in water treatment.
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Journal of Materials Chemistry A
·
2025
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IF 9.5
Zhimin Kou,Ye Sha,Meiting Liu,Guixin Zhang,Jie Wang,Meng Zhang,Lihong Hu,Puyou Jia,Yonghong Zhou
The intelligent design and green manufacturing of bio-based adhesives still face severe challenges. In this study, an epoxy adhesive based on β-hydroxyester bonds and multiple hydrogen bonds was prepared using tung oil and lignin. Molecular dynamics simulation was used to regulate the structure and properties of adhesives. The adhesive with a large number of aromatic ring structures and phenolic hydroxyl groups enhanced cohesion and surface adsorption through π–π stacking and hydrogen bonding. Conjugated double bonds and the flexible long chain of tung oil in the structural skeleton of adhesives provided modification sites and endowed the materials with good ductility. The adhesive materials showed remarkable mechanical properties, recyclability, and an adhesive strength of approximately 6 MPa, enabling their effective use in various harsh environments, with a decrease in shear strength of only about 10%. Two adhesive models, one with β-hydroxyester bonds and multiple hydrogen bonds and the other without these structures, were established for comparison. The adhesion energy on the wood surface was calculated to assess the impact of each structural component in the system. In this study, a strategy to analyze the interplay between the microstructure and properties of adhesives was presented, and a potential route for the intelligent design and manufacturing of high-performance bio-based adhesives was provided.
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Soft Matter
·
2024
·Vol. 20
·期 27
·5343-5350
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IF 2.9
Hongchao Yan,Juan Wang,Xichan He,Dongsheng Yu,Yuan Qiu,Yonggui Liao,Xiaolin Xie
The fabrication of stimulus-responsive supramolecular hydrogels as smart materials has attracted much attention in recent years. However, the multi-stimuli responsiveness often requires complicated chemical synthesis and rational molecular design. Herein, a quadruple-stimuli responsive supramolecular hydrogel was designed through the host–guest interaction between a β-CD dimer and a methoxy-azobenzene (mAzo) and ferrocene (Fc) grafted poly(acrylic acid) derivative, as well as through the electrostatic interaction of negatively charged carboxyl side groups. Owing to the dynamic properties of the host–guest and electrostatic interactions, reversible sol–gel transition can be triggered by various stimuli, including temperature, light irradiations, pH changes and chemical redox reagents. As a result, the release of rhodamine B loaded in the hydrogel can be accelerated by green light irradiation, oxidizing agents and low pH, demonstrating potential applications in biomedical materials.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2024
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IF 5.7
Chengqiang Li,Zhuoning Cao,Hong Jiang,Francesco Secundo,Xiangzhao Mao
β-N-Acetylhexosaminidases have attracted much attention in the enzymatic synthesis of lacto-N-triose II (LNT2) as a backbone precursor of human milk oligosaccharides (HMOs). In this study, a novel glycoside hydrolase (GH) 20 family β-N-acetylhexosaminidase, FlaNag2353, from Flavobacterium algicola was biochemically characterized and applied to synthesize LNT2. FlaNag2353 displayed optimal activity to p-nitrophenyl N-acetyl-β-d-glucosaminide (pNP-GlcNAc) at 40 °C and pH 8.0. In addition to its excellent hydrolysis activity toward pNP-GlcNAc and chitooligosaccharides, FlaNag2353 showed trans-glycosylation activity. Under conditions of pH 9.0 and 55 °C for 2 h and utilizing 200 mM lactose and 10 mM pNP-GlcNAc, FlaNag2353 synthesized LNT2 with a conversion ratio of 4.15% calculated from pNP-GlcNAc. Moreover, when applied to LNT2 synthesis with 10 mM pNP-GlcNAc and 9.7% (w/v) industrial waste whey powder, FlaNag2353 achieved a conversion ratio of 2.39%. This study has significant implications for broadening the applications of GH20 β-N-acetylhexosaminidases and promoting the high-value utilization of whey powder.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2024
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IF 5.7
Yongmei Chang,Weihuan Xu,Shan Wang,Mengyao Zhu,Yanan Ru,Zhiheng Xu,Guangyou Chen,Yongqiang Li
Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) is a globally devastating pest and has evolved with varying levels of resistance to a broader spectrum of insecticides. CarEs are major enzymes involved in insecticide detoxification and metabolic resistance. Four CarE genes were identified and cloned from H. armigera, and the expression pattern analyses indicated that they were predominantly expressed in the detoxifying tissues and larval feeding periods. The insecticide inductive assays further suggested that these CarE genes with expressions were significantly upregulated after beta-cypermethrin, lambda-cyhalothrin, malathion, and chlorpyrifos exposures. The purified recombinant proteins of both CarE016B and CarE016C by bacterial expression exhibited significantly higher catalytic efficiency toward α-naphthyl acetate and also showed relatively stronger binding with both β-cypermethrin and λ-cyhalothrin compared to the CarE006C and CarE015A. In vitro metabolism assay with HPLC suggests that CarE016B and CarE016C have the ability to metabolize β-cypermethrin, λ-cyhalothrin, and malathion with varying hydrolase activities. GC-MS/MS analysis identified 3-phenoxybenzaldehyde (3-PBAld) as the metabolite of both β-cypermethrin and λ-cyhalothrin. Homology modeling and molecular docking analyses further indicate that these three types of insecticides could be anchored into the active pocket of both CarEs. Collectively, these results demonstrate that both CarE016B and CarE016C play a critical role in the detoxification of pyrethroid and organophosphate insecticides in H. armigera. This study provides the foundations for a comprehensive understanding of the role of the CarEs family in insecticide detoxification and resistance in H. armigera.
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JOURNAL OF CHEMICAL THERMODYNAMICS
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2012
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IF 2.422
Yao Chen,Hui Wang,Yanyan Tang,Jun Zeng
Ternary (liquid + liquid) equilibria date for the (water + 2-propanol + α -pinene, or β -pinene) systems were measured at T = (293.15, 298.15, 303.15, and 308.15) K under atmospheric pressure. The experimental results were correlated using the extended and modified UNIQUAC models. The calculated results obtained from the modified UNIQUAC model successfully represent the experimental tie-line data. The temperature influence on liquid-phase equilibria was studied.
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JOURNAL OF CATALYSIS
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2012
·
IF 6.002
Xiang Li,Yi Shi,Zhoujun Wang,Yahong Zhang,Yi Tang
In this paper, uniform H-β nanozeolite microsphere (β-ZMS) prepared by polymerization-induced colloid aggregation, combined with an immobilized lipase B from Candida antarctica (commercially available Novozym® 435), is applied as a racemization catalyst to the one-pot dynamic kinetic resolution (DKR) of aromatic sec -alcohols. The DKRs of various aromatic sec- alcohols can be carried out with high selectivity and conversion under optimum conditions. Importantly, it is found that, compared to commercial zeolites β (C-β), β-ZMSs display high selectivity for small sec- alcohol molecules because their shorter microporous channels reduce the diffusion time of substrate/product in the three-dimensional framework, and thereby decrease the possibility of secondary reactions. However, the β-ZMSs show a high racemization rate in the DKR of large sec- alcohol molecules, such as racemic 1-(1-naphthyl)-ethanol, thanks to their abundant accessible active sites. This observation will not only benefit the performance of acidic zeolite catalysts in one-pot DKR systems but also provide a new perspective on the application of nanozeolites in catalysis.
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LUMINESCENCE
·
2015
·Vol. 31
·期 1
·96-101
·
IF 1.518
Si-Yao Liu,Huan Wang,Tian He,Liang Qi,Zhi-Qi Zhang
A fluorescence method was established for a α-glucosidase activity assay and inhibitor screening based on β-cyclodextrin-coated quantum dots. p -Nitrophenol, the hydrolysis product of the α-glucosidase reaction, could quench the fluorescence of β-cyclodextrin-coated quantum dots via an electron transfer process, leading to fluorescence turn-off, whereas the fluorescence of the system turned on in the presence of α-glucosidase inhibitors. Taking advantage of the excellent properties of quantum dots, this method provided a very simple, rapid and sensitive screening method for α-glucosidase inhibitors. Two α-glucosidase inhibitors, 2,4,6-tribromophenol and acarbose, were used to evaluate the feasibility of this screening model, and IC 50 values of 24 μM and 0.55 mM were obtained respectively, which were lower than those previously reported. The method may have potential application in screening α-glucosidase inhibitors. Copyright © 2015 John Wiley & Sons, Ltd.
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JOURNAL OF LUMINESCENCE
·
2015
·
IF 2.719
Qian Liu,Qi Lu,Guanghui Liu,Qinhua Wei
β-SiAlON:Eu 2+ phosphors synthesis usually requires higher temperatures and higher nitrogen pressure conditions. In the present research, a low temperature technique has been developed to synthesize both β-SiAlON and Eu-doped β-SiAlON fibers by electrospinning combined with carbothermal reduction nitridation (CRN). The carbon sources used as reductant in CRN procedure have been optimized to effectively produce a well-crystallized β-SiAlON phase at lower temperatures of 1370–1500 °C. Additionally, through adding sucrose and covering activated carbon powders on the top of fiber precursor layers, the highly-pure β-SiAlON and β-SiAlON:Eu 2+ fibers could be obtained. The pyrolysis behavior of fiber precursors, crystalline phase, morphology, and UV excited luminescence properties of the produced ceramic fibers were also studied by using TG–DSC measurement, XRD analysis , SEM observation, and spectrometer method. The resultant fibers exhibit a smooth surface and an uniforme morphology with a substantial length. Moreover, the β-SiAlON:Eu 2+ fibers thus prepared show a blue light emission peaked at 470 nm under UV excitation.
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ANALYTICA CHIMICA ACTA
·
2015
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IF 4.513
Chang Liu,Peng Wang,Zhigang Shen,Xueke Liu,Zhiqiang Zhou,Donghui Liu
In our work, the pH-controlled magnetic solid phase extraction for the determination of paraquat and diquat was introduced firstly. Furthermore, to clarify the mechanism of carboxymethyl-β-cyclodextrin functionalized magnetic adsorbents, we studied the pH-responsive supramolecular interaction between carboxymethyl-β-cyclodextrin (CM-β-CD) and paraquat/diquat by ultraviolet–visible (UV–vis) spectroscopy and nuclear magnetic resonance (NMR) experiment, and the energy-minimized structures were also obtained. Then, the functional group CM-β-CD was modified on the surface of magnetic materials to synthesize the adsorbent. The Fourier transform infrared spectrum (FT-IR) results proved the successful modification of CM-β-CD. Thus, this absorbent was applied for the determination of paraquat and diquat in water. Under the optimal condition, limits of detection (LODs) of paraquat and diquat were 0.8 μg L −1 and 0.9 μg L −1 , relative standard deviations (RSD) and recoveries varied 0.7–4.6% and 86.5–106.6%, respectively. Good recoveries (70.2–100.0%) and low RSD (1.7–9.6%) were achieved in analyzing spiked water samples. Furthermore, with the capillary electrophoresis (CE) as the analyser, the whole analytical process did not need the attendance of organic solvents .
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JOURNAL OF SEPARATION SCIENCE
·
2016
·Vol. 39
·期 12
·2413-2421
·
IF 2.741
Chao Han,Jianguang Luo,Zhongrui Li,Yingqi Zhang,Huijun Zhao,Lingyi Kong
A biphasic chiral recognition system based on chiral ligand exchange with Cu(II)- N - n -dodecyl-L-proline and hydroxypropyl-β-cyclodextrin as an additive was developed to enantioseparate aromatic β-amino acids by high-speed counter-current chromatography. The biphasic chiral recognition system was established with an n -butanol/water (1:1, v/v) solvent system by adding N - n -dodecyl-L-proline and Cu(II) ions to the organic phase and hydroxypropyl-β-cyclodextrin to the aqueous phase. Several separation parameters, such as temperature, pH value, and chiral selector concentration, were systematically investigated by enantioselective liquid–liquid extraction. Under the optimal separation conditions, 54.5 mg of ( R , S )-β-phenylalanine and 74.3 mg of ( R , S )-β-3,4-dimethoxyphenylalanine were baseline enantioseparated. More importantly, the synergistic enantiorecognition mechanism, based on the Cu(II)- N - n -dodecyl-L-proline and hydroxypropyl-β-cyclodextrin, was discussed for the first time.
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