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Keplerate polyoxomolybdate nanoball mediated controllable preparation of metal-doped molybdenum disulfide for electrocatalytic hydrogen evolution in acidic and alkaline media

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Chinese Chemical Letters 2024年第7期35卷 524-528页

作者： ping wang Ting wang Ming Xu Ze Gao Hongyu li Bowen li Yuqi wang Chaoqun Qu Ming Feng Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun 130103China School of Science Changchun University of Science and TechnologyChangchun 130022China

Rationally designed novel cost-effective hydrogen evolution reaction(HER)electrocatalysts with controlled surface composition and advanced structural superiority is extremely critical to optimize the HER ***(POMs)with structural diversity and adjustable element compositions represent a promising precursor for rational design and preparation of HER ***,a series of transition metal-doped MoS_(2)materials with different surface engineered structures(Fe,Cr,V doping and S vacancies)(M-MoS_(2)/CC,M=Fe,Cr and V)were fabricated by a simple hydrothermalvulcanization strategy using Keplerate polyoxomolybdate nanoball({Mo_(72)Fe_(30)},{Mo_(72)Cr_(30)},{Mo_(72)V_(30)},{Mo_(132)})as *** enlarged interlayer spacing as well as the integration of homogeneous transition metal doping and abundant sulfur vacancies endows prepared M-MoS_(2)/CC with superior HER electrocatalytic performance and excellent long-term working stability in both acidic and alkaline *** optimized Fe-MoS_(2)/CC afford current densities of 10 and 50 mA/cm^(2)at overpotentials of 188/272 mV and 194/394 mV in 0.5 mol/L H_(2)SO_(4)and 1.0 mol/L KOH aqueous solution,respectively,outperforming most of reported typical transition metal sulfide-based *** work represents an important breakthrough for POMs-mediated highly efficient transition metal sulfide-based HER electrocatalysts with wide range pH activity and may provide new options for the rational design of promising HER electrocatalysts and beyond.

关键词： Polyoxometalate Electrocatalytic Hydrogen evolution reaction Doping MoS_(2)

Synthesis and Herbicidal Activity of 3-Subsituted Amino-6-(substituted phenoxyl)pyridazine Derivatives

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有机化学 2004年第Z1期24卷 202-203页

作者： HU,Fang-Zhong wang,Zhan-ping li,Yong-Hong YANG,Hua-Zheng State Key Laboratory and Institute of Elemento-Organic Chemistry Nankai University Tianjin 300071 State Key Laboratory and Institute of Elemento-Organic Chemistry Nankai University Tianjin 300071 State Key Laboratory and Institute of Elemento-Organic Chemistry Nankai University Tianjin 300071 State Key Laboratory and Institute of Elemento-Organic Chemistry Nankai University Tianjin 300071

　　In recent years, many pyridazine derivatives have shown highly biological activities, such as fungicides, insecticides and herbicides. Especially, the researches of 3-(substituted phenoxyl)pyridazine derivatives h... 详细信息

关键词： biological activities

Double casing warhead with sandwiched charge:The axial distribution of fragments velocities

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Defence Technology（防务技术） 2024年第4期34卷 201-216页

作者： ping Ye Yongxiang Dong Qitian Sun Peizhuo Shi wang Yao Yongnan li Yujing li Mingze li State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

The double casing warhead with sandwiched charge is a novel fragmentation warhead that can produce two groups of fragments with different velocity,and the previous work has presented a calculation formula to determine the maximum fragment *** current work builds on the published formula to further develop a formula for calculating the axial distribution characteristics of the fragment *** this type of warhead,the simulation of the dispersion characteristics of the detonation products at different positions shows that the detonation products at the ends have a much larger axial velocity than those in the middle,and the detonation products have a greater axial dispersion velocity when they are closer to the central *** loading process and the fragment velocity vary with the axial position for both casing layers,and the total velocity of the fragments is the vector sum of the radial velocity and the axial *** the same axial position,the acceleration time of the inner casing is greater than that of the outer *** the same casing,the fragments generated at the ends have a longer acceleration time than the fragments from the *** proposed formula is validated with the X-ray radiography results of the four warheads previously tested experimentally and the 3D smoothedparticle hydrodynamics numerical simulation results of several series of new warheads with different *** formula can accurately and reliably calculate the fragment velocity when the lengthto-diameter ratio of the charge is greater than 1.5 and the thickness of the casing is less than 20%its inner *** work thus provides a key reference for the theoretical analysis and the design of warheads with multiple casings.

关键词： Double casing warhead Sandwiched charge Fragment velocity Rarefaction wave Gurney formula Explosive loading

高校环境实验室危险源的风险分级与防范网络屏障的构建

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实验室检测

实验室检测 2024年第5期2卷 73-76页

作者：雷灵琰白向玉张洪建王丽萍中国矿业大学环境与测绘学院徐州221116

高校环境实验室危险源的种类和危险特性多样,危险源的风险分级与防范网络屏障构建对高校实验室危险源的管理具有较大的推进作用。文章采用系统工程的方法,进行了环境实验室危险源的分类统计分析;基于事故风险链理论、多层次综合评价法... 详细信息

高校环境实验室危险源的种类和危险特性多样,危险源的风险分级与防范网络屏障构建对高校实验室危险源的管理具有较大的推进作用。文章采用系统工程的方法,进行了环境实验室危险源的分类统计分析;基于事故风险链理论、多层次综合评价法和墨菲定律,构建了环境实验室危险源的风险分级指标体系和防范网络屏障。结果表明:(1)实验室的危险源风险分为危险因素和危险单元风险两个层次,危险因素和危险单元的风险分为极度危险、重度危险、显著危险、潜在危险和稍有危险五个等级。(2)实验物质、工艺设备、环境、人员、安全管理构成实验事故风险链条,事故发生是一个链条事件,构建层层防御屏障大大降低事故的发生概率。构建基于实验项目的实验全员分工负责、物环人管环环相扣、危险单元全周期、全方位、分级化精准监管的防范网络屏障是实验室安全的强有力保证。

关键词：实验室危险源危险单元事故风险链防范网络屏障

Calorie control increased vaspin levels of serum and periepididymal adipose tissue in diet-induced obese rats in association with serum free fatty acid and tumor necrosis factor alpha

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Chinese Medical Journal 2010年第7期123卷 936-941页

作者： wang You-min wang Wen-ping wang li-ping LU Qi-huan ZHOU Xiao-hui Institute of Endocrinology & Metabolism Anhui Medical University Department of Endocrinology First Affiliated Hospital of Anhui Medical University Hefei Anhui 230022 China

Background Vaspin was recently identified as a novel adipokine that is predominantly secreted from adipose tissue and exerts insulin-sensitizing effects. This study was undertaken to elucidate the regulative effects of calorie control on the expression of vaspin and its potential *** Diet-induced obese Sprague Dawley （SD） rats were adopted as experimental models and accepted interventions of various ingestions and pioglitazone. Various differentiated stages of cultured 3T3-L1 cells were dealt with pioglitazone or TNFα in vitro for 48 hours to further verify findings in animal *** The rats were successfully induced into an obese experimental model with hyperinsulinemia, hyperlipidemia, and increased serum free fatty acid and TNFa by 12-week high-fat diet. It was found that depending on whether the rats were fed by a high-fat diet or a basal diet, there was extremely higher vaspin in the periepididymal fat pad than in subcutaneous adipose tissues by 16 weeks. Vaspin in sera and the periepididymal fat pad was much lower in rats with a high-fat diet than those with a basal diet （all P 〈0.05）, but vaspin in subcutaneous fat tissues was prone to increase in rats with a high-fat diet. A 4-week calorie restriction or pioglitazone on the obese rats resulted in a partial recovery of vaspin levels in sera and periepididymal adipose tissues, especially the latter revealed a more obvious superiority and increased vaspin levels of subcutaneous adipose. Surprisingly, the treatment of 4-week high-fat diet on non-obese rats did not significantly depress vaspin of sera and periepididymal adipose tissues. However, it is unknown if re-feeding generated the effect on vaspin levels of obese and non-obese rats on sera or adipose tissues. The correlation analysis showed that vaspin levels of serum and periepididymal fat tissues were negatively correlated with serum FFA, TNFα and insulin; meanwhile, there was a positive correlation between serum vaspin and vasp

关键词： vaspin diet-induced obese rats pioglitazone calorie control

Chiral helically grooved gold nanoarrows for concurrently enhancing oxygen and hydrogen evolution from electrochemical water splitting

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Science China Chemistry 2024年第11期67卷 3767-3776页

作者： Lufei Huang Tao wang Ying li ping wang Rui Tian Baowen Zhou lin Yao China-UK Low Carbon College Shanghai Jiao Tong University Electron Microscopy Laboratory School of Physics Peking University State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of Physics Peking University Key Laboratory for Power Machinery and Engineering of Ministry of Education Research Center for Renewable Synthetic FuelSchool of Mechanical Engineering Shanghai Jiao Tong University

Electrocatalytic water splitting shows a tremendous promise for storing green and intermittent electricity into storable fuels,paving a sustainable way toward carbon neutrality. The exploration of a bifunctional electrocatalyst for simultaneously enhancing oxygen evolution reaction and hydrogen evolution reaction is at the core yet remains a grand challenge, especially operated in the same electrolyte. In this work, mesoscale gold nanoarrows with special chiral morphology are synthesized for electrocatalytic water splitting. In the same electrolyte of 1 M KOH aqueous solution, the as-designed chiral R-/L-helically grooved gold nanoarrows（R-/L-heli GNAs） demonstrated significantly enhanced performance in both hydrogen evolution reaction and oxygen evolution reaction with overpotentials of 186 and 355 m V at 10 m A cm-2, respectively, compared to the achiral counterpart. For oxygen evolution reaction, the performance is even comparable to commercial notable metal catalysts,i.e., RuO2, of which the overpotential is 310 m V under the same measured conditions. The spin-polarized conductive atomic force microscope（c-AFM）, finite-difference time-domain simulation, in combination with electrochemical investigations, show that the chirality of R-/L-heli GNAs makes a substantial contribution toward the remarkable performance by enhanced electric field distribution for hydrogen evolution reaction and by tuning the spin states of the electrons for oxygen evolution *** study presents an encouraging strategy for simultaneously promoting hydrogen evolution reaction and oxygen evolution reaction that operated in the same electrolyte by imparting chirality toward a mesoscale inorganic electrocatalyst, showing a grand promise for opening up a new way for electrocatalytic water splitting toward green hydrogen.

关键词： chirality electron spin water splitting hydrogen evolution reaction oxygen evolution reaction

Genetic Variations Among liriomyza sativae Blanchard Populations Indicated by β-tubulin Gene Sequences

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Agricultural Sciences in China 2007年第5期6卷 580-585页

作者： ZHENG Fu-shan DU Yu-zhou wang li-ping LU Ya-juan LU Zi-qiang Institute of Applied Entomology Yangzhou University Yangzhou 225009 P.R.China Yangzhou Entry-Exit Inspection and Quarantine Bureau Yangzhou 225009 P.R.China

To analyze the genetic differentiation of the host- and geo-populations of liriomyza sativae Blanchard, the β-tubulin gene of 5 host-populations and 6 geo-populations of L. sativae was sequenced. Subsequently, the sequences were analyzed by biosoftware DNAStar and MEGA, and the phylogenetic trees constructed. The results obtained by the two softwares were similar, that is, the sequences of β-tubulin gene were more than 98% homologous, among the host- and geo-populations of L. sativae, with only 8 variable sites, but no insertions and deletions were detected. It seems that differentiations in β-tubulin gene among the host- and geo-populations of L. sativae are related to the hobby to hosts and the geographical distributions, respectively.

关键词： liriomyza sativae Blanchard host-populations geo-populations β-tubulin gene genetic differentiation

Genetic Variation of Host Populations of liriomyza sativae Blanchard

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Agricultural Sciences in China 2008年第5期7卷 585-590页

作者： wang li-ping DU Yu-zhout HE Ya-ting ZHENG Fu-shan LU Zi-qiang Institute of Applied Entomology Yangzhou University Yangzhou 225009 P.R.China State Key Laboratory for Biology of Plant Disease and Insect Pests Institute of Plant Protection Chinese Academy of AgriculturalSciences Beijing 100094 P.R.China

In this study, partial sequences of the mitochondrial cytochrome oxidase subunit I （mtDNA-COI） gene and the ribosomal internal transcribed spacer 1 （rDNA-ITS 1） gene, isolated from five artificial populations of liriomyza sativae （Diptera： Agromyzidae）, were sequenced and compared, to analyze their genetic variation. Analysis of the mtDNA-CO1 gene showed that a low genetic variation was detected among the five populations and only five variable sites were found in the nucleotide sequences. Most of the observed variations that occurred within the populations were because of nucleotide transitions, whereas, the interpopulation variation was because of the differences in haplotype frequencies occurring among the host populations. Analysis of the rDNA-ITS1 gene revealed a small diversity in the five host populations. The trend of genetic differentiation in the host populations was consistent with the preference of L. sativae to the plant hosts.

关键词： liriomyza sativae host populations mtDNA-COI rDNA-ITS 1 genetic differentiation

Advancements in precision nanomedicine design targeting the anoikis-platelet interface of circulating tumor cells

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3457-3475页

作者： Manqing Tang Zhijie Zhang ping wang Feng Zhao lin Miao Yuming wang Yingpeng li Yunfei li Zhonggao Gao College of Chinese Materia Medica Tianjin University of Traditional Chinese MedicineTianjin 301617China State Key Laboratory of Component-Based Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

Tumor metastasis,the apex of cancer progression,poses a formidable challenge in therapeutic *** tumor cells(CTCs),resilient entities originating from primary tumors or their metastases,significantly contribute to this process by demonstrating remarkable *** survive shear stress,resist anoikis,evade immune surveillance,and thwart *** comprehensive review aims to elucidate the intricate landscape of CTC formation,metastatic mechanisms,and the myriad factors influencing their *** signaling pathways,such as integrin-related signaling,cellular autophagy,epithelial-mesenchymal transition,and interactions with platelets,are examined in ***,we explore the realm of precision nanomedicine design,with a specific emphasis on the anoikis‒platelet *** innovative approach strategically targets CTC survival mechanisms,offering promising avenues for combatting metastatic cancer with unprecedented precision and *** review underscores the indispensable role of the rational design of platelet-based nanomedicine in the pursuit of restraining CTC-driven metastasis.

关键词： CTCs Anoikis Platelet Cancer stem cell Metastasis Platelet‒CTC interaction Platelet targeting Nanomedicines