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SSrN 2025年

作者： Zhang, Na Li, Shuyao Wu, Lulu Zhong, Haiqi Li, Shuyi Wang, Xuehua Cheng, Shuiyuan Chen, Xu Zhu, Zhenzhou School of Modern Industry for Selenium Science and Engineering Wuhan Polytechnic University Wuhan430023 China National R&D Center for Se-rich Agricultural Products Processing Technology Wuhan Polytechnic University Wuhan430023 China Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products Wuhan430023 China Huazhong University of Science and Technology China

Preliminary studies have indicated that reducing the particle size of tea polysaccharides (TPS) significantly enhances their absorption, although this process also diminishes their antioxidant capacity. To effectively address this challenge, we have successfully synthesized highly stable selenium nanoparticles (SeNPs) using sodium selenite and ascorbic acid as reductants. TPS is an excellent stabilizer and dispersant. Comprehensive characterization through particle size analysis, transmission electron microscopy (TEM), UV-Vis spectroscopy, FT-Ir, Xrd, and XPS confirms that the resulting TPS-SeNPs exhibit a striking orange-red color, are amorphous, zero-valent, and spherical, with an average particle size of 82.2 nm. The binding of SeNPs to TPS via Se-O and Se-N bonds has been confirmed. Stability tests unequivocally demonstrate that TPS-SeNPs remain stable under various conditions. In vitro experiments reveal robust antioxidant activity, efficient selenium slow-release properties, and enhanced polysaccharide digestion, underscoring their significant potential as antioxidant supplements. © 2025, The Authors. All rights reserved.

关键词： Fourier transform infrared spectroscopy

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Quantitative kinetic and catalytic analysis of 5-hydroxymethylfurfural electrooxidation reaction through in-situ raman spectroscopy

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Chemical engineering Journal 2025年 514卷

作者： dong, Hui Li, Hongbo Ye, Fenghui Fang, Yunming College of Chemical Engineering Beijing University of Chemical Technology Beijing100029 China Beijing Key Lab of Bioprocess National Energy R&D Center for Biorefinery Beijing100029 China College of Life Science and Technology Beijing University of Chemical Technology Beijing100029 China

The electrochemical oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FdCA) has emerged as a key reaction for producing bio-based chemicals. However, developing efficient catalyst for HMF Oxidation reaction (HMFOr) at high concentrations and establishing a kinetic equation for modeling the industrial-scale production of FdCA remain challenging. In this study, in-situ raman spectroscopy using an immersion probe was developed as a rapid, non-invasive method for real-time analysis of HMF and FdCA during HMFOr. Combining Gaussian simulations and experimentally collected spectra, the in-situ raman quantification method was established. A high-performance electrocatalyst, O-NiSe, was developed. In-situ raman spectroscopy offers compelling evidence for the rapid formation of Ni3+ active sites on the O-NiSe surface during HMFOr, leading to impressive FdCA yields of 98 % and 88.5 % in concentrated HMF solutions of 30 and 100 mM, respectively. By varying HMF concentrations and reaction temperatures, in-situ raman spectra were collected over time, enabling the determination of kinetic parameters and the establishment of a dynamic kinetic model. This model provides insights into optimizing HMFOr processes, demonstrating the quantitative potential of in-situ raman spectroscopy for monitoring and optimizing electrochemical catalytic processes. © 2025 Elsevier B.V.

关键词： Electrochemical oxidation

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The role of hydroxyl groups on SiO2 supported CuCo catalyst in the direct synthesis of ethanol from syngas

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Molecular Catalysis 2025年 581卷

作者： Yang, Jiaqian Xue, duomei Geng, Shiqi Jin, Jiayu Wu, Yingquan Xing, Yuanyuan Liu, Xudong Zhi, Lifei Sun, Kai Tan, Yisheng College of Chemical Engineering and Technology Taiyuan University of Science and Technology Taiyuan030024 China State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan030001 China Taiyuan Hengdeyuan Animal Health Technology R&D Co. Ltd China Shanxi Inspection and Testing Center China Qingyuan Innovation Laboratory Quanzhou362801 China

Understanding the role of hydroxyl groups on SiO2 in regulating the electronic and structural properties of copper and cobalt species is of great significance for direct conversion of syngas to ethanol. Here we report that the hydroxyl groups are efficiently modulated by pretreatment of SiO2 with H2O2 at different temperatures and obtain the CuCo/(Si-100H) catalyst with appropriate amounts of Si-OH. It can simultaneously possesses the highest CO conversion (37.8 %) and ethanol selectivity (29.0 wt %), together with excellent ethanol space-time yield of 17.0 mg/mLcat·h. The excellent performance can be attributed to the fact that the Si-OH promotes the dispersion and reduction degree of Cu and Co by a strong metal-support interaction, resulting in the formation of more Cu+-Co0 synergistic active sites, known as the key sites for C2-oxygenate formation. Among them, Co0 species facilitate the dissociation of CO and generat a large amount of CHx⁎ intermediates, which could react with the CO⁎ species adsorbed on the adjacent Cu+ species, greatly stimulating the formation of ethanol. More significantly, Operando drIFT characterization revealed that the moderate incorporation of hydroxyl groups effectively suppresses CHₓ⁎ hydrogenation into methane. Consequently, a substantial amount of CHx⁎ intermediates engaged in the propagation of the carbon chain, thus facilitating the production of ethanol. This investigation offers a facile preparation method and insights to improve the ethanol yield for direct syngas conversion. © 2025

关键词： Hydrogenation

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Correction: Protocols for degradation assessment and stability enhancement in perovskite solar cells (Chemical Communications (2025) 61 (6722-6738) dOI: 10.1039/d5CC01404B)

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Chemical Communications 2025年第42期61卷 7696-7696页

作者： Seok Joo Yang Sungwon Song Chaneui Park Jinhyeok Choi Eunho Lee Min Kim Department of Chemical Engineering Gyeongsang National University Jinju Republic of Korea Semiconductor R&D at Samsung Electronics Suwon Republic of Korea Department of Chemical and Biomolecular Engineering Seoul National University of Science and Technology Seoul Republic of Korea Department of Chemical Engineering Center for Innovative Chemical Processes Institute of Engineering University of Seoul Seoul Republic of Korea

The authors regret that Chaneui Park’s name was spelled incorrectly in the original article. The correct spelling is as presented here. The royal Society of Chemistry apologises for these errors and any consequent in...

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Manipulating the ionization of polyamide nanofiltration membrane for cascade separation of low-molecular-weight tobacco extracts

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Journal of Membrane Science 2025年 728卷

作者： Liu, Chunbo Zhang, Chuanqi ren, Xuejiao Li, Ge Tang, Shiyun Feng, Xin Lu, dan Yao, Zhikan Wang, Tonghua Zhang, Shouhai Zhang, Lin State Key Laboratory of Fine Chemicals Dalian Key Laboratory of Membrane Materials and Processes School of Chemical Engineering Dalian University of Technology Dalian116024 China MOE Engineering Research Center of Membrane and Water Treatment Technology College of Chemical and Biological Engineering Zhejiang University Zhejiang Hangzhou310027 China Future Environment Laboratory Innovation Center of Yangtze River Delta Zhejiang University Jiaxing314100 China Yunnan Key Laboratory of Tobacco Chemistry R&D Center of China Tobacco Yunnan Industry Co. Ltd. Kunming650231 China

Nanofiltration (NF) is a promising technology capable of separating various organic molecules from mixtures. However, the application of current NF membranes for tobacco extracts with similar molecular weights (MWs) suffers from the limited separation capability due to their intrinsically wide pore size distribution, especially the inability to reject molecules with low MWs. Here, we present an electrostatic interaction regulation strategy for molecules and membranes by controlling the ionization behavior of both polyamide membranes and compound molecules to selectively separate low MW tobacco extracts with similar sizes. It was achieved by meticulously tuning the membrane chargeability and solution pH to dissociate or protonate charged groups of the membrane surface and targeted molecules. As a result, compared with the original solution, the rejection of low MW tobacco extracts—phthalic acid, benzoic acid, and ethyl vanillin—increased by 98.4, 83.0, and 82.4 %, respectively, after adjusting the feed solution pH. Furthermore, by manipulating ionization behavior, the membrane effectively rejected similarly charged molecules while allowing neutral and oppositely charged molecules to pass, successfully facilitating the separation of electronegative, electropositive and electroneutral mixtures. In the four-stage membrane cascade system, all tobacco extracts in the mixture were stepwise separated and purified, increasing the purity of each molecule (phthalic acid, benzoic acid, ethyl vanillin, nicotine, and 2-phenylethanol) from 20 % to over 70 %. Overall, this study developed a novel membrane cascade system by manipulating the molecular-membrane electrostatic interactions, providing an efficient and energy-saving method for the separation and purification of small-molecule tobacco extracts with similar MWs. © 2025 Elsevier B.V.

关键词： Nanofiltration

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Effect of ultra vacuum assisted high pressure die casting on the mechanical properties of Al-Si-Mn-Mg alloy

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Journal of Alloys and Compounds 2025年 1026卷

作者： Yang, Jian Liu, Bo Shu, dongwei Li, Huizhao Yang, Qin Hu, Tiegang Wang, Zhibai Zeng, Yunbo Haung, Jun Tang, Xiaoliang School of Mechanical Engineering University of Science and Technology Beijing Beijing100083 China School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore Beijing Key Laboratory of Lightweight Metal Forming University of Science and Technology Beijing Beijing100083 China Global R&D Center Chongqing Changan Automobile Co. Ltd Chongqing401120 China Chenzhi Science And Technology Co. Ltd Chongqing402760 China

For ultra-large and complex die casting aluminum alloy parts, the design of a three-stage ultra vacuum assisted high pressure die casting (HPdC) process is realized by evacuating from the shot sleeve, die cavity and venting plate in stages. Process innovation leads to die cavity with 10 mbar minimum vacuum and 23.4 mbar mean vacuum. Compared to conventional HPdC parts, the yield strength, tensile strength and ductility of the parts from the ultra vacuum HPdC are increased by 3.65 %, 3.55 % and 7.41 %, respectively. Weibull distribution confirmed that the ultra vacuum HPdC process notably enhances the reproducibility of mechanical properties while markedly reducing fluctuations in ductility. Moreover, as the vacuum level increases, the microstructure becomes denser, accompanied by a higher area fraction and a more homogeneous distribution. Ultra vacuum HPdC process transforms Al-Si-Mn-Mg alloy from brittle fracture to mixed ductile-brittle fracture, and improved the alloy internal defects. The reduction in defect size can delay crack initiation. Consequently, ultra vacuum HPdC markedly enhances the material's resistance to crack propagation, yielding substantial practical benefits for industrial productivity and the enhancement of mechanical properties. © 2025

关键词： Magnesium alloys

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FECT: Classification of Breast Cancer Pathological Images Based on Fusion Features

arXiv

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arXiv 2025年

作者： Hao, Jiacheng Liu, Yiqing Zeng, Siqi He, Yonghong Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate School Shenzhen518055 China Medical Optical Technology R&D Center Research Institute of Tsinghua Pearl River Delta Guangzhou510700 China School of Medicine Nankai University Tianjin300071 China

Breast cancer is one of the most common cancers among women globally, with early diagnosis and precise classification being crucial. With the advancement of deep learning and computer vision, the automatic classification of breast tissue pathological images has emerged as a research focus. Existing methods typically rely on singular cell or tissue features and lack design considerations for morphological characteristics of challenging-to-classify categories, resulting in suboptimal classification performance. To address these problems, we proposes a novel breast cancer tissue classification model that Fused features of Edges, Cells, and Tissues (FECT), employing the resMTUNet and an attention-based aggregator to extract and aggregate these features. Extensive testing on the BrACS dataset demonstrates that our model surpasses current advanced methods in terms of classification accuracy and F1 scores. Moreover, due to its feature fusion that aligns with the diagnostic approach of pathologists, our model exhibits interpretability and holds promise for significant roles in future clinical applications. Copyright © 2025, The Authors. All rights reserved.

关键词： Lung cancer

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α,α’-dibromo-p-xylene crosslinked MOF-5/polybenzimidazole mixed matrix membranes for organic solvent nanofiltration

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Separation and Purification technology 2025年 373卷

作者： Ajebe, Eyasu Gebrie Hu, Chien-Chieh Habte, Biadglign Ayalneh Wang, Chih-Feng Hung, Wei-Song Wu, Shao-Jung Lee, Kueir-rarn Lai, Juin-Yih Graduate Institute of Applied Science and Technology Advanced Membrane Materials Research Center National Taiwan University of Science and Technology Taipei10607 Taiwan Institute of Advanced Semiconductor Packaging and Testing National Sun Yat-sen University Kaohsiung804 Taiwan R&D Center for Membrane Technology Chung Yuan University Chung-Li32023 Taiwan Department of Chemical Engineering Ming Chi University of Technology New Taipei City243 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan Chungli32003 Taiwan

Advanced mixed matrix membranes (MMMs) for high-performance organic solvent nanofiltration (OSN) were developed by incorporating porous MOF-5 nanoparticles into a polybenzimidazole (PBI) matrix, utilizing α,α’-dibromo-p-xylene (dBX) as a cross-linker to enhance chemical stability. The fabricated membranes were thoroughly characterized using scanning electron microscopy (SEM), attenuated total reflection Fourier transform infrared spectroscopy (ATr-FTIr), water contact angle measurements, zeta potential analysis, X-ray photoelectron spectroscopy (XPS), and mechanical property testing. Incorporation of MOF-5 into the PBI matrix improved solvent permeance, though a slight decrease in methyl blue dye rejection was noted. Further increases in MOF-5 loading resulted in reduced permeance, likely due to pronounced nanoparticle agglomeration within the membrane structure. The optimal MOF-5 loading was identified as 4 wt%. Notably, the crosslinked MMM achieved a methyl blue rejection of 99.90% and a permeance of 15.8 LMH/bar in an acetone environment. In addition, both pristine PBI and crosslinked MMMs were evaluated under neutral and basic aqueous conditions, where the crosslinked PBI membrane exhibited excellent stability in aggressive solvents while maintaining separation performance at elevated pH levels. The crosslinked MMM also demonstrated significant fouling resistance, sustaining its OSN performance during continuous testing over a 120-hour period. © 2025 Elsevier B.V.

关键词： Fourier transform infrared spectroscopy

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dispersion spectrum and transient responses of guided waves in graphene platelet reinforced piezoelectric polymer composite plates

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Aerospace Science and technology 2025年 163卷

作者： Hua, Fenfei Sun, Zhenzhong Huang, Qingyang Fu, Xinrong Cui, Yueyue Huang, Yicang Zhou, Xiaoqiang School of Mechanical Engineering Dongguan University of Technology Dongguan 523808 China School of Aerospace Engineering Huazhong University of Science and Technology Wuhan 430074 China Shenzhen Poisson Software Technology Co. Ltd Shenzhen 518129 China R&D Center Wuhan Second Ship Design and Research Institute Wuhan 430205 China

This work focuses on the wave propagation in graphene platelets (GPLs) reinforced piezoelectric polymer composite plates. The GPL volume fractions in the multilayered structure vary step-wisely to emulate a functionally graded profile. The governing equations for the piezoelectric composite plate are obtained using the reissner-Mindlin theory in conjunction with the Hamilton's principle. A polynomial equation describing the dispersion spectrum relations is formulated using the closed-form solutions. The structural symmetry enables the wave modes decoupling into symmetric and antisymmetric parts. The piezoelectric plate spectral element with four degrees of freedom per node including the out-of-plane motions and electric potential is developed. The present spectral element model is verified by comparing with the reported results. The dependences of distribution pattern, weight fraction, geometric factor, and piezoelectricity of GPL on the dispersion characteristics are demonstrated. Furthermore, the phase evolution, amplitude attenuation, time-of-flight variation, and wave-boundary interaction are revealed through the transient responses. These findings supply an instruction for the design and wave modulation of smart piezoelectric composites. © 2025 Elsevier Masson SAS

关键词： Graphene reinforcement Piezoelectric composite Spectral element method Transient response Wave propagation

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Measure and Quantify the Water State of Frozen dough in Situ: Insights from the Study of Variable Temperature 1h Time-domain Nuclear Magnetic resonance (Vt-Nmr)

SSRN

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SSrN 2025年

作者： Wang, Shujing Li, Huipin Tang, Ning Ji, Shengxin Ai, Zhilu Yang, Yong College of Food Science and Technology Henan Agricultural University Zhengzhou450002 China Key Laboratory of Staple Grain Processing Ministry of Agriculture and Rural Affairs Zhengzhou450002 China National R&D Center for Frozen Rice & Wheat Products Processing Technology Zhengzhou450002 China Henan Engineering Research Center of Cold-Chain Food Zhengzhou450002 China

The water states and distribution in frozen dough are critical to its quality. In this study, variable temperature 1H time-domain nuclear magnetic resonance (VT-NMr) was used to in situ investigate the unfrozen water (UFW) content of frozen dough and the changes in water distribution during the freezing process. VT-NMr results indicated that higher gluten content and lower water content corresponded to higher UFW levels. The UFW content measured by VT-NMr was consistent with values obtained by differential scanning calorimetry (dSC), confirming the efficacy of VT-NMr as a non-destructive tool for studying water states in frozen dough. during the freezing process from 2 °C to -30 °C, both the water proton population area and T2 relaxation time decreased significantly. At -30 °C, the water distribution within the dough stabilized. VT-NMr offered significant potential for online quality monitoring in industrial frozen dough production. © 2025, The Authors. All rights reserved.

关键词： Nuclear magnetic resonance

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