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Recent Progress in Carbon-based Materials of Non-Noble Metal Catalysts for ORR in Acidic Environment

Acta Metallurgica Sinica(English Letters) 2021年第7期34卷 885-899页

作者： Jie Lian jin-yu zhao Xiao-Min Wang College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi Key Laboratory of New Energy Materials and Devices Taiyuan University of TechnologyTaiyuan 030024China

Proton exchange membrane fuel cell(PEMFC)has important implications for the success of clean transportation in the *** of the key factors affecting the cost and performance of PEMFC is the cathode electrocatalyst for the oxygen reduction reaction(ORR)to overcome sluggish kinetics and instability in an acidic *** an essential component of the electrocatalyst,the support material largely determines the activity,mass transfer,charge transfer,and durability of the ***,the support material plays a critical role in the overall performance of the *** materials are widely used as electrocatalyst supports because of their high porosity,conductivity,chemical stability,and tunable ***,some new carbon-based materials with excellent structure have been introduced,such as carbon nanotubes,carbon nanowires,graphene,metal-organic framework(MOF)-derived carbon,and biomass-derived carbon *** with a variety of strategies,such as controllable construction of porous structures and surface defects,proper doping heteroatoms,the ingenious design of model electrocatalysts,and predictive theoretical calculation,a new reliable path was provided for further improving the performance of electrocatalysts and exploring the catalytic *** on the topic of carbon-based materials for ORR in acidic medium,this review summarizes the up-to-date progress and breakthroughs,highlights the factors affecting the catalytic activity and stability of ORR electrocatalysts in acids,and discusses their future application and development.

关键词： Carbon-based materials Non-noble metal electrocatalysts Acidic environment Oxygen reduction reaction Proton exchange membrane fuel cell

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Effects of Sodium Sulfate as Electrolyte Additive on Electrochemical Performance of Lead Electrode

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Chemical Research in Chinese Universities 2013年第2期29卷 374-378页

作者： yu jin-yu QIAN zhao-hong zhao Meng WANG yu-jie NIU Lin Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China

Sodium sulfate as an electrolyte additive was studied via electrochemical methods including linear sweep voltammetry（LSV）, cyclic voltammetry（CV） and electrochemical impedance spectroscopy（EIS） to deeply understand its effect on the hydrogen evolution current and overpotential as well as the formation and structure of anodic passi- vation films on lead surface during the redox processes. The results achieved will be valuable to improve the cycle life and maintenance-free properties of lead-acid batteries.

关键词： Electrolyte additive Sodium sulfate Lead electrode Hydrogen evolution reaction Anodic film

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Effects of Drying Processes on the Antioxidant Properties in Sweet Potatoes

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Agricultural Sciences in China 2010年第10期9卷 1522-1529页

作者： YANG jing CHEN jin-feng zhao yu-ying MAO Lin-chun Department of Food Science and Nutrition College of Biosystem Engineering and Food Science Zhejiang University Hangzhou 310029 P.R. China

The effects of different drying methods （hot-air drying, microwave drying and vacuum-freeze drying） on the antioxidant activity and antioxidants in sweet potato （lpomoea batatas L. Lain.） tubers were investigated to determine the potential drying process. Sweet potato tubers were cut into 5 mm thick slices, steamed at 100℃ for 10 rain, then dried in either hotair, microwave, or vacuum-freeze. The dried sweet potatoes in microwave possessed the highest antioxidant activity, while the lowest activity was observed in hot-air dried samples. The phenolic contents were positively correlated with scavenging activity and reducing power of DPPH^＋. The microwave drying retains the highest antioxidant activity with the highest content of phenolic compounds in dried sweet potatoes. β-carotene and ascorbic acid showed minor contribution to the antioxidant activity in dried sweet potatoes.

关键词： sweet potato (lpomoea batatas L. Lam.) drying antioxidant activity antioxidants

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NUMERICAL SIMULATION OF UNSTEADY TURBULENT FLOW INDUCED BY TWO-DIMENSIONAL ELEVATOR CAR AND COUNTER WEIGHT SYSTEM

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Journal of Hydrodynamics 2007年第6期19卷 720-725页

作者： SHI Li-qun LIU Ying-zheng jin Si-yu CAO zhao-min Power Machinery Engineering lab Key Lab of Education Ministry of China School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200240 China

A two-dimensional model of unsteady turbulent flow induced by high-speed elevator system was established in the present study. The research was focused on the instantaneous variation of the aerodynamic force on the car structure during traversing motion of the counter weight in the hoistway. A dynamic meshing method was employed to treat the multi-body motion system to avoid poor distortion of meshes. A comprehensive understanding of this significant aspect was obtained by varying the horizontal gap （δ =0.1m, 0.2m, and 0.3m） between the elevator car and the counter weight, and the moving speed （ U 0= 2m/s, 6m/s, and 10m/s） of the elevator system. A pulsed intensification of the aerodynamic force on the elevator car and subsequent appearance of large valley with negative aerodynamic force were clearly observed in the numerical results. In parameters studied （ δ =0.1m, U 0= 2m/s, 6m/s, 10m/s）, the peaked horizontal and vertical forces are respectively 7-11 and 4.3-5.65 times of that when the counter weight is far from the car. These results demonstrated the prominent influence of the traversing counter weight on aerodynamic force on the elevator car, which is of great significance to designers of high-speed elevator system.

关键词： high-speed elevator turbulent flow aerodynamic force Computational Fluid Dynamics (CFD)

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Toxic influence of chronic oral administration of paraquat on nigrostriatal dopaminergic neurons in C57BL/6 mice

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Chinese Medical Journal 2009年第19期122卷 2366-2371页

作者： REN jin-peng zhao yu-wu SUN Xiao-jiang Department of Neurology Shanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai 200233 China

Background Paraquat （PQ; 1,1＇-dimethyl-4,4＇-bipyridinium）, a widely used herbicide, has been repeatedly suggested as a potential etiologic factor for the development of Parkinson＇s disease （PD）, owing to its structural similarity to the known dopaminergic neurotoxicant 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine （MPTP）. This study aimed to observe the influence of paraquat on nigrostriatal dopaminergic neurons in C57BL/6 mice. Methods A total of 24 male C57BL/6 mice were assigned randomly to 3 groups： control group （treated by saline）, PQ treated group, and MPTP treated group. Mice in PQ treated group were taken orally with PQ （10 mg/kg） daily for four months. Locomotor activity was measured. Level of dopamine （DA） and its metabolites levels in the striatum were measured by high-performance liquid chromatography with an electrochemical detector （HPLC-ECD）, and tyrosine hydroxylase （TH） positive neurons were detected by using immunohistochemistry. At the same time, the activities of superoxide dismutase （SOD） and glutathione peroxidase （GSH-PX）, and the content of malondialdehyde （MDA） in substantia nigra were measured by spectrophotometry, mRNA expression of dopamine transporter （DAT） in dopaminergic neurons of substantia nigra was also determined by reverse transcription （RT）-PCR technique. Results Locomotor activities were significantly impaired in the PQ treated group. Level of DA and its metabolites levels in the striatum were declined. The activities of SOD and GSH-PX were decreased, and the content of MDA was increased in PQ treated mice compared with that in control group. Numbers of TH positive neurons and the mRNA expression of DAT in substantia nigra of mice were also decreased after PQ taken orally for four months. Conclusions The present study suggests that chronic oral administration of PQ could trigger dopaminergic neuron degeneration. Oxidative stress could be involved in the pathogenic mechanism of PD induced by PQ.

关键词： Parkinson's disease," paraquat oxidative stress," tyrosine hydroxylase dopamine transporter

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Functional types of long trichoid sensilla responding to sex pheromone components in Plutella xylostella

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Insect Science 2024年第5期31卷 1503-1518页

作者： Xiao-Fei Li Xing-Tao Qie Bao-Tong Mo Cai-Feng Wang Zeng-Hua Xing jin-yu zhao Chen-Zhu Wang Chi Hao Li Ma Xi-Zhong Yan College of Plant Protection Shanxi Agricultural UniversityTaiguShanxi ProvinceChina State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBejingChina CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijingChina

Sex pheromones,which consist of multiple components in specific ratios pro-mote intraspecific sexual communications of *** xylostella(L.)is a world-wide pest of cruciferous vegetables,the mating behavior of which is highly dependent on its olfactory *** trichoid sensilla on male antennae are the main olfactory sen-silla that can sense sex ***,the underlying mechanisms remain *** this study,3 sex pheromone components from sex pheromone gland secretions of P xy-lostella female adults were identified as Z11-16:Ald,Z11-16:Ac,and Z11-16:0H in a ratio of 9.4:100:17 using gas chromatography-mass spectrometry and gas chromatography with electroantennographic *** responses of 581 and 385 long trichoid sensilla of male adults and female adults,respectively,to the 3 components were measured by single sensillum *** clustering analysis showed that the long trichoid sensilla were of 6 different *** the male antennae,52.32%,5.51%,and 1.89%of the sensilla responded to Z11-16:Ald,Z11-16:Ac,and Z11-16:0H,which are named as A type,B type,and C type sensilla,respectively;2.93%named as D type sen-silla responded to both Z11-16:Ald and Z11-16:Ac,and 0.34%named as E type sensilla were sensitive to both Z11-16:Ald and Z11-16:*** the female antennae,only 7.53%of long trichoid sensilla responded to the sex pheromone components,A type sensilla were 3.64%,B type and C type sensilla were both 0.52%,D type sensilla were 1.30%,and 1.56%of the sensilla responded to all 3 components,which were named as F type *** responding long trichoid sensilla were located from the base to the terminal of the male antennae and from the base to the middle of the female *** pheromone mixture(Z11-16:Ald:Z11-16:Ac:Z11-16:0H=9.4:100:17)had a weakly repellent effect on female adults of P *** results lay the foundation for further studies on sex pheromone communications in ***.

关键词： electrophysiological responses long trichoid sensilla Plutella xylostella sex pheromone single sensillum recording

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可加风险模型下现状数据的降维问题

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数理统计与管理 2023年第3期42卷 439-448页

作者：赵慧于金钊中南财经政法大学统计与数学学院湖北武汉430073

文章基于可加风险模型假设,采用偏最小二乘回归和有监督的主成分回归两种投影降维方法,研究了高维协变量情况下现状数据的降维问题。通过深入地模拟试验,对比两种降维方法在高维相关现状数据的生存预测方面的表现,最后将两种降维方法结... 详细信息

文章基于可加风险模型假设,采用偏最小二乘回归和有监督的主成分回归两种投影降维方法,研究了高维协变量情况下现状数据的降维问题。通过深入地模拟试验,对比两种降维方法在高维相关现状数据的生存预测方面的表现,最后将两种降维方法结合实际数据集进行实证分析。模拟和实证结果表明这两种降维方法能很好地处理具有高维、强相关协变量的小样本数据集,比如基因微阵列数据。在后续的研究中,有望将现状数据扩展至其它更一般的区间删失数据。

关键词：现状数据偏最小二乘回归有监督的主成分回归

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High-temperature-tolerant flexible supercapacitors: Gel polymer electrolytes and electrode materials

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Journal of Energy Chemistry 2025年第1期100卷 426-457页

作者： Chong Peng Xinyi Huang Mingwei zhao Shuling Liao Quanhong Yang Nianjun Yang Siyu yu School of Chemistry & Chemical Engineering Southwest University Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Department of Chemistry & IMO-IMOMEC Hasselt University

The development of flexible supercapacitors(FSCs) capable of operating at high temperatures is crucial for expanding the application areas and operating conditions of supercapacitors. Gel polymer electrolytes and electrode materials stand as two key components that significantly impact the efficacy of hightemperature-tolerant FSCs(HT-FSCs). They should not only exhibit high electrochemical performance and excellent flexibility, but also withstand intense thermal stress. Considerable efforts have been devoted to enhancing their thermal stability while maintaining high electrochemical and mechanical performance. In this review, the fundamentals of HT-FSCs are outlined. A comprehensive overview of state-of-the-art progress and achievements in HT-FSCs, with a focus on thermally stable gel polymer electrolytes and electrode materials is provided. Finally, challenges and future perspectives regarding HT-FSCs are discussed, alongside strategies for elevating operational temperatures and *** review offers both theoretical foundations and practical guidelines for designing and manufacturing HT-FSCs, further promoting their widespread adoption across diverse fields.

关键词： Flexible supercapacitors High-temperature tolerance Gel polymer electrolytes Electrode materials

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First report on establishment and characterization of the extrahepatic cholangiocarcinoma sarcoma cell line CBC2T-2

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World Journal of Gastroenterology 2023年第41期29卷 5683-5698页

作者： Ning-Zu Jiang Ming-Zhen Bai Chong-Fei Huang Ze-Long Ma Ru-Yang Zhong Wen-Kang Fu Long Gao Liang Tian Ning-Ning Mi Hai-Dong Ma Ya-Wen Lu Zi-Ang Zhang jin-yu zhao Hai-Ying yu Bao-Ping Zhang Xian-Zhuo Zhang Yan-Xian Ren Chao Zhang Yong Zhang Ping yue Yan-Yan Lin Wen-Bo Meng The First Clinical Medical College Lanzhou UniversityLanzhou 730000Gansu ProvinceChina Department of General Surgery The First Hospital of Lanzhou UniversityLanzhou 730000Gansu ProvinceChina Laboratory of Biological Therapy and Regenerative Medicine Transformation Gansu Province The First Hospital of Lanzhou UniversityLanzhou 730000Gansu ProvinceChina Department of General Surgery The First Hospital of Lanzhou University and Laboratory of Biological Therapy and Regenerative Medicine Transformation Gansu ProvinceLanzhou 730000Gansu ProvinceChina

BACKGROUND Extrahepatic cholangiocarcinoma sarcoma is extremely rare in clinical *** cells consist of both epithelial and mesenchymal ***-derived cell lines that maintain tumor characteristics are valuable tools for studying the molecular mechanisms associated with ***,cholangiocarcinoma sarcoma cell lines are not available in cell *** To establish and characterize a new extrahepatic cholangiocarcinoma sarcoma cell line,namely *** We conducted a short tandem repeat(STR)test to confirm the identity of the CBC2T-2 cell ***,we assessed the migratory and invasive properties of the cells and performed clonogenicity assay to evaluate the ability of individual cells to form *** tumorigenic potential of CBC2T-2 cells was tested in vivo using nonobese diabetic/severe combined immunodeficient(NOD/SCID)*** cells were injected subcutaneously and tumor formation was *** addition,immunohistochemical analysis was carried out to examine the expression of epithelial marker CK19 and mesenchymal marker vimentin in both CBC2T-2 cells and *** CBC2T-2 cell line was used to screen the potential therapeutic effects of various clinical agents in patients with cholangiocarcinoma ***,whole-exome sequencing was performed to identify genetic alterations and screen for somatic mutations in the CBC2T-2 cell *** The STR test showed that there was no cross-contamination and the results were identical to those of the original *** cells showed round or oval-shaped epithelioid cells and mesenchymal cells with spindle-shaped or elongated *** cells exhibited a high proliferation ratio with a doubling time of 47.11 *** cell line has migratory,invasive,and clonogenic *** chromosomes in the CBC2T-2 cells were polyploidy,with numbers ranging from 69 to *** subcutaneous tumorigenic assay confirmed the in vivo tumorigenic ability of CBC2T-2 cells in NOD/

关键词： Carcinosarcoma Drug resistance Xenograft Cell line Establishment

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Low-cost and fluoride-free synthesis of MFI zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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Journal of Energy Chemistry 2025年第1期100卷 458-468页

作者： Peng Zhu Cun Liu Yiren yu Guoshu Gao yumeng zhao Xiongfu Zhang Guodong Liu Guohui Yang State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： MFI zeolite ZSM-5 Nanosheets Scale-up synthesis Aromatic alkylation

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