INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yanan Zhao,Yitong Wang,Fei Yu,Linyin Ma,Hui Teng,Lei Chen
We investigated the effects of 2-Octen-1-ylsuccinic anhydride (OSA) modification and ultrasound on the structure, interface, and emulsification ability of fucoidans (FUCs). A modified polysaccharide emulsion system containing melatonin with high stability was established. The results demonstrated that the interfacial tension of the modified FUCs decrease gradually and the amphiphilicity was improved. The 9 %-OSA-FUCs emulsions ultrasonicated at 400 W presented the smallest volume-average droplet diameter (1.34 ± 0.03 μm) and the storage stability were also remarkably improved by the processing method. Meanwhile, the emulsion system enhances melatonin bioaccessability, effectively shielding it from the gastrointestinal environment and ensuring stable delivery to the small intestine for optimal absorption. At the same time, the emulsion system improves the bioaccessability of melatonin (55.32 % > 24.20 % of melatonin) and effectively delay the release of FFA in first 10 min (17.72 % < 21.98 %). This study provides insights into rational modification strategies for functional polysaccharide-based emulsifiers and designing delivery systems for chemically labile hydrophobic bioactive components.
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Yiyang Zeng,Shuai Yang,Mao Yang,Yu Gong,Xingrui Tang,Xiaolong Fu,Junyan Wang,Guangming Ran,Chengjian Xiao
Hydrogen separation and purification play a crucial role in the chemical industry. High-temperature electrochemical hydrogen pump (HT-EHP) technology based on polybenzimidazole (PBI) membranes has great potential for hydrogen purification, the key to this application lies in the design of PBI membranes with high proton conductivity. To achieve this, we optimized the spatial conformation of polymer chains by coordinating metal ions (Zn 2+ /Co 2+ ) with the imidazole groups in PBI, forming continuous coordination cavities. Molecular dynamics (MD) simulations revealed that the coordination between metal ions and imidazole induces polymer chain distortion, creating sub-nanometer coordination cavities (∼8 Å). Wide-angle X-ray scattering (WAXS) and wide-angle X-ray diffraction (WAXD) confirmed the existence of these coordination cavities. After the removal of metal ions, the residual cavities were filled with phosphoric acid (PA), constructing long-range ordered proton conduction pathways in the high-performance PBI membranes ( o -PBI-Zn and o -PBI-Co). Scanning electron microscopy (SEM) analysis showed that the continuous porous network within the polymer chains resembles a root-like structure, facilitating efficient three-dimensional proton transport. The resulting membranes exhibited excellent mechanical properties (tensile strength of 45 MPa) and outstanding proton conductivity (0.126 S/cm at 160 °C). When assembled into a HT-EHP, the membranes achieved a hydrogen purification rate of 9.22 mL (cm 2 ·min) −1 at 180 °C, with an energy consumption as low as 0.1 kWh/L(H 2 ). This study presents an innovative strategy for designing high-proton-conductivity PBI membranes, significantly enhancing their potential for HT-EHP applications, offering a promising alternative for hydrogen purification technologies.
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高影响因子
PROCEEDINGS OF THE COMBUSTION INSTITUTE
·
2025
·
IF 5.2
Zhaohan Chu,Zhongkai Liu,Changyang Wang,Long Zhao,Bin Yang
An experimental study was conducted to investigate the weight growth routes from o -methylphenyl radical ( o -CH 3 C 6 H 4 ) to indene. o -Nitrosotoluene served as the precursor for o -methylphenyl radicals in this study. Co-pyrolysis of o -methylphenyl radical/C 2 H 2 and o -methylphenyl radical/C 2 H 4 was investigated utilizing the chemical microreactor and synchrotron vacuum ultraviolet photoionization mass spectrometry. Sampled mass-specific photoionization efficiency (PIE) curves were employed to identify the aromatic species, elucidating interactions between o -methylphenyl radicals and C 2 species. The species detected at m/z = 116 and 118, essential for understanding the reaction mechanism, were identified via matching photoionization cross-sections and adiabatic ionization energies with literature and theoretical values. Specifically, indene and its isomer o -methylphenylacetylene ( m/z = 116) were determined in the reaction of o -methylphenyl radical with C 2 H 2 , while indene and o -methylstyrene ( m/z = 118) were identified in the reaction of o -methylphenyl radical with C 2 H 4 . By combining the identified intermediate species with previous literature basis, the formation pathways for indene, originating from o -methylphenyl radical were discussed in both reaction systems, providing further insights for understanding the indene formation pathways.
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高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2017
·Vol. 36
·期 2
·147-152
·
IF 1.852
Qing-Wen Song,Ping Liu,Li-Hua Han,Kan Zhang,Liang-Nian He
One-pot two-step stepwise reaction of terminal propargylic alcohols, carbon dioxide, and primary/secondary amines for the effective synthesis of various urethanes through robust silver-catalysed C-O/C-N bond formation is reported. Catalytic activities were investigated by controlling catalyst loading, reaction pressure and time, and very high turnover number (turnover frequency) was obtained: 3350 (35 h −1 ) with 0.01 mol% silver catalyst under 0.1 MPa, and up to 13360 (139 h −1 ) with 0.005 mol% silver catalyst under 2.0 MPa at room temperature. The strategy was ingeniously regulated, and synchronously afforded a wide range of β-oxopropylcarbamate and 1,3-oxazolidin-2-one motifs in excellent yields and selectivity together with unprecedented high turnover number (TON) and turnover frequency (TOF) value.
研究领域:
化学
·
材料科学
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DOI
高影响因子
Bioengineered
·
2019
·
IF 1.544
Jingyuan Weng,Liangliang Chen,Yinchu Cheng,Yan Li,Honghua Jia,Hua Zhou,Ping Wei
Quercetin-4′-O-glucoside is one of the major quercetin derivatives in the mature red onion bulb. It has an adjuvant effect on allergies, asthma, arthritis, and cancer. The present study aimed to use uridine diphosphate glycosyltransferase 88A1 (UGT88A1) from Arabidopsis thaliana to achieve the enzymatic synthesis of quercetin-4′-O-glucoside from quercetin. The results showed that UGT88A1 was most active at pH 9.0. The optimum temperature of UGT88A1 for synthesizing quercetin-4′-O-glucoside was 45°C, which was a little lower than that for synthesizing quercetin-3-O-glucoside (50°C). One mutant, V18R, of UGT88A1 was obtained by site-directed mutation and showed a greater affinity (Km 0.20 mM) and twice the enzyme activity (552.3 mU/mg) towards quercetin compared with the wild-type enzyme (0.36 mM and 227.6 mU/mg, respectively). The possible reason could be attributed to the distance change between the 18th amino-acid residue of UGT88A1 and the substrate quercetin, as deduced by molecular simulation.
研究领域:
植物学
·
生物化学
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PubMed
高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 9
·3241-3250
·
IF 6.119
Ming Jiang,Xiaopeng Chen,Linlin Wang,Jiezhen Liang,Xiaojie Wei
Selective hydrogenolysis of aryl ethers to produce aromatic compounds is a key strategy for lignin valorization. The use of non-noble-metal catalysts to realize the cleavage of C–O ether bonds under mild conditions has been of considerable research interest recently. We herein report the synthesis of a nitrogen-doped porous-carbon-skeleton-supported Ni–CeO2 catalyst (Ni–CeO2/CN). The synergistic effect between Ni and CeO2 species led to the Ni–CeO2/CN catalyst having a high activity and selectivity for the cleavage of C–O ether bonds at a low reaction temperature. In particular, the Ni–CeO2/CN catalyst showed excellent effectiveness in the hydrogenolysis of benzyl phenyl ether (α-O-4 bonds), and the full conversion was achieved after 2 h at a temperature of 60 °C, with phenol and toluene as the sole reaction products. In addition, the conversion of more robust β-O-4 ether bonds in 2-phenoxy-1-phenylethanol reached up to 100% with the yield of ethylbenzene and phenol at 150 °C for 2.5 h being 60.2% and 68.3%, respectively. The reusability-experiment results indicate that Ni–CeO2/CN maintained a high catalytic activity in five reaction runs, making this a promising route for C–O ether bond cleavage under mild conditions.
研究领域:
催化化学
·
生物质转化
·
材料科学
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 6
·1-11
·
IF 5.3
Zhang Xingping,Feng Yujun,Chen Xiaowei,Wang Yuanyuan,Guo Yingli,Yang Xin,Yang Hualin
A sensitive fluorescence and colorimetric dual-mode detection method based on Eu 3+ and Fe 3 O 4 @MoS 2 nanocomposites was constructed. In this technique, tetracycline antibiotics (TCs) chelated with Eu 3+ to form a Eu 3+ -TCs complex which emits red fluorescence at 620 nm through the antenna effect. At the same time, Eu 3+ -TCs complex enhances the peroxidase-like activity of Fe 3 O 4 @MoS 2 to catalyze the oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) that can produce a colorimetric signal. This proposed strategy has been used to detect three antibiotics including oxytetracycline (OTC), tetracycline (TC), and chlortetracycline hydrochloride (HCl-CTC). The linear ranges of the new assay for OTC, TC, and HCl-CTC were 0.1–25 μM, 0.5–25 μM, and 0.05–5 μM with the detection limits of 0.016 μM, 0.039 μM, and 0.036 μM, respectively. Meanwhile, this new method was fast and convenient which can complete the detection in 22 min. The assay has been effectively applied to TCs detection in tap water, lake water and honey with satisfactory recoveries of 90.55–109.86%. Graphical
研究领域:
分析化学
·
环境科学
·
食品科学
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DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yiyang Lin,Tao Lin,Han Chen,Junding Yin
The effect of N , N -bis(carboxymethyl)glutamic acid (GLDA) on the removal of organic pollutants by Fe(II)-mediated periodate (PI) advanced oxidation process at neutral pH was investigated, in which N-(1,3-dimethylbutyl)- N ′-phenyl- p -phenylenediamine quinone (6PPD-Q) was used as the model pollutant. The results showed that the Fe(II)-GLDA complex formed by mixing GLDA with Fe(II) in a 1:1 ratio reacted with PI can degrade 6PPD-Q effectively. The presence of GLDA alters the redox potential of Fe(II)/Fe(III), which allows for a better utilization of Fe(II) under the synergistic effect of ultraviolet (UV) irradiation. Based on quenching experiments, sulfoxide probe transformation and electron spin resonance (ESR) signals, the reactive species that play a major role in this process are Fe IV O and IO 3 . The degradation products of 6PPD-Q were detected by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry (UPLC-MS/MS) and two possible degradation pathways were proposed based on density functional theory (DFT) calculations. The toxicity of 6PPD-Q was found to be effectively reduced after degradation by Ecological Structure Activity Relationships (ECOSAR) software analysis and zebrafish experiments. This study provides some fundamental insights for the removal of organic pollutants by GLDA-enhanced Fe(II)/PI system under neutral conditions.
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Qianlin Huang,Puzhen Zhao,Weiwei Wang,Lu Lv,Weiming Zhang,Bingcai Pan
Cost-efficient and durable manganese-based catalysts are in great demand for the catalytic elimination of volatile organic compounds (VOCs), which are dominated not only by the nanostructures but also by the oxygen vacancies and Mn–O bond in the catalysts. Herein, a series of nanostructured Co–Fe-doped-δ-MnO2 catalysts (Co–Fe-δ-MnO2) with high dispersion were in situ fabricated by employing metal–organic-frameworks (MOFs) as reducing agents, dopants, and templates all at the same time. The as-obtained Co–Fe-δ-MnO2-20% catalyst exhibited robust durability and high catalytic activity (225 °C) for toluene combustion even in the presence of 5 vol % water vapor, which is 50 °C lower than that of pristine δ-MnO2. Various characterizations revealed that the homogeneously dispersed codoping of Co and Fe ions into δ-MnO2 promotes the generation of oxygen vacancies and weakens the strength of the Mn–O bond, thus increasing the amount of adsorbed oxygen (Oads) and improving the mobility of lattice oxygen (Olatt). Meanwhile, due to successfully inheriting the framework structures of MOFs, the obtained catalyst exhibited a high surface area and three-dimensional mesoporous structure, which contributes to diffusion and increases the number of active sites. Moreover, in situ DRIFTS results confirmed that the toluene degradation mechanism on the Co–Fe-δ-MnO2-20% follows the MVK mechanism and revealed that more Oads and high-mobility Olatt induced by this novel method contribute to accumulating and mineralizing key intermediates (benzoate) and thus promote toluene oxidation. In conclusion, this work stimulates the opportunities to develop Co–Fe-δ-MnO2 as a class of nonprecious-metal-based catalysts for controlling VOC emissions.
研究领域:
环境科学
·
材料科学
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2012
·
IF 2.823
Zhen-Lin Xu,Jie-Xian Dong,Hong Wang,Zhen-Feng Li,Ross C. Beier,Yue-Ming Jiang,Hong-Tao Lei,Yu-Dong Shen,Jin-Yi Yang,Yuan-Ming Sun
A single-chain variable fragment (scFv) linked alkaline phosphatase (AP) fusion protein for detection of O,O-diethyl organophosphorus pesticides (O,O-diethyl OPs) was produced and characterized. The scFv gene was prepared by cloning VL and VH genes from hybridoma cells secreting monoclonal antibody with broad specificity for O,O-diethyl OPs. The amplified VL and VH regions were assembled using a linker (Gly4Ser)3 by means of splicing overlap extension polymerase chain reaction to obtain the scFv gene, which was cloned into the expression vector pLIP6/GN containing an AP gene to produce the scFv–AP fusion protein in Escherichia coli strain BL21. The protein was purified by antigen-conjugated immunoaffinity chromatography and characterized by sodium dodecyl sulfate–polyacrylamide gel electrophoresis, Western blotting, and competitive direct enzyme-linked immunosorbent assay (cdELISA). The fusion protein is bifunctional, retaining both antigen binding specificity and AP enzymatic activity. Analysis of spiked and blind river water and Chinese cabbage samples demonstrated that the fusion protein based cdELISAFP exhibited good sensitivity and reproducibility.
研究领域:
生物化学
·
环境科学
·
免疫学
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DOI
PubMed
高影响因子
Small
·
2023
·
IF 13.3
Mengyang Cui,Shiyang Fu,Shisheng Yuan,Bo Jin,Hui Liu,Yiyang Li,Nan Gao,Qing Jiang
The development of solid-state electrolytes (SSEs) effectively solves the safety problem derived from dendrite growth and volume change of lithium during cycling. In the meantime, the SSEs possess non-flammability compared to conventional organic liquid electrolytes. Replacing liquid electrolytes with SSEs to assemble all-solid-state lithium metal batteries (ASSLMBs) has garnered significant attention as a promising energy storage/conversion technology for the future. Herein, a composite solid electrolyte containing two inorganic components (Li 6.25 Al 0.25 La 3 Zr 2 O 12 , Al 2 O 3 ) and an organic polyvinylidene difluoride matrix is designed rationally. X-ray photoelectron spectroscopy and density functional theory calculation results demonstrate the synergistic effect among the components, which results in enhanced ionic conductivity, high lithium-ion transference number, extended electrochemical window, and outstanding dual interface compatibility. As a result, Li||Li symmetric battery maintains a stable cycle for over 2500 h. Moreover, all-solid-state lithium metal battery assembled with LiNi 0.6 Co 0.2 Mn 0.2 O 2 cathode delivers a high discharge capacity of 168 mAh g −1 after 360 cycles at 0.1 C at 25 °C, and all-solid-state lithium–sulfur battery also exhibits a high initial discharge capacity of 912 mAh g −1 at 0.1 C. This work demonstrates a long-life flexible composite solid electrolyte with excellent interface compatibility, providing an innovative way for the rational construction of next-generation high-energy-density ASSLMBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
电池技术
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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Wangxia Wang,Feng Gu,J.Y. Zhu,Kaiyong Sun,Zhaosheng Cai,Shufeng Yao,Wenjuan Wu,Yongcan Jin
Lignin valorization is significantly influenced by the degrees of lignin condensation measured by the amount of cleaved β O 4 ether linkages and interunit C C linkages formed during biomass fractionation. To minimize the cleavage of aryl ether and formation of C C linkages, a p–toluenesulfonic acid (p–TsOH)/choline chloride (ChCl) solvent system with hydrotropic properties was evaluated. The ChCl was chosen to control the H + concentration of the p–TsOH/ChCl solvent system. Compared with p–TsOH/H 2 O, the degradation of β O 4 was kept in a similar rate during p–TsOH/ChCl fractionation; however, the formation of C C linkage was slower. Under 75/25 p–TsOH/ChCl mass ratio at 80 °C for 20 min, 76.6 % of miscanthus lignin, with β O 4 content of 30.9 %, and 88.9 % of wheat straw lignin, with β O 4 content of 33.6 %, can be dissolved. In addition, the low polar and layered structure of hydrotropic p–TsOH/ChCl system has a strong ability to dissolve lignin, which resulted in lignin with larger particle size and lower surface charge. The results also indicated that lignin from p–TsOH/ChCl solvent system has great potential for lignin depolymerization to aromatics for valorization.
研究领域:
生物化学
·
可再生资源与环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）