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Deformable Catalytic Material Derived from Mechanical Flexibility for Hydrogen Evolution Reaction

Nano-Micro Letters 2024年第2期16卷 287-311页

作者： Fengshun Wang Lingbin Xie Ning Sun Ting Zhi Mengyang Zhang Yang Liu Zhongzhong Luo lanhua yi Qiang Zhao Longlu Wang College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NJUPT)9 WenyuanNanjing 210023People’s Republic of China Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education School of ChemistryXiangtan UniversityXiangtan 411105People’s Republic of China State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)&Institute of Flexible Electronics(Future Technology)Nanjing University of Posts&Telecommunications9 WenyuanNanjing 210023People’s Republic of China

Deformable catalytic material with excellent flexible structure is a new type of catalyst that has been applied in various chemical reactions,especially electrocatalytic hydrogen evolution reaction(HER).In recent years,deformable catalysts for HER have made great progress and would become a research hotspot.The catalytic activities of deformable catalysts could be adjustable by the strain engineering and surface reconfiguration.The surface curvature of flexible catalytic materials is closely related to the electrocatalytic HER properties.Here,firstly,we systematically summarized self-adaptive catalytic performance of deformable catalysts and various micro–nanostructures evolution in catalytic HER process.Secondly,a series of strategies to design highly active catalysts based on the mechanical flexibility of lowdimensional nanomaterials were summarized.Last but not least,we presented the challenges and prospects of the study of flexible and deformable micro–nanostructures of electrocatalysts,which would further deepen the understanding of catalytic mechanisms of deformable HER catalyst.

关键词： Deformable catalytic material Micro-nanostructures evolution Mechanical flexibility Hydrogen evolution reaction

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类型教育视域下高职院校教师评价体系改革:现状、困境与创新

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西北成人教育学院学报 2024年第2期 45-51页

作者：易兰华邬移生湖南商务职业技术学院湖南长沙410205

教师评价体系改革是深化新时代高职教育评价改革的关键,对促进职业教育类型教育发展具有重要现实意义。当前,我国高职院校教师评价实践还不能适应职业教育类型教育发展的需要,需要从转变教师管理理念、分类设置教师岗位、建立以潜心育... 详细信息

教师评价体系改革是深化新时代高职教育评价改革的关键,对促进职业教育类型教育发展具有重要现实意义。当前,我国高职院校教师评价实践还不能适应职业教育类型教育发展的需要,需要从转变教师管理理念、分类设置教师岗位、建立以潜心育人为导向的多元化评价体系、推行目标管理突出教育教学实绩考核、降低教师评价中行政话语权地位、规范考核评价程序、强化评价主体约束与结果反馈等方面进行改革创新,形成具有类型特色的高职院校教师评价体系,以更好地引导高职院校教师职业发展、促进高职院校顺应职业教育类型教育发展的要求。

关键词：教师评价高职院校破五唯潜心育人多元化

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A Comparison Study on the δD Value of Polycyclic Aromatic Hydrocarbons in Hydrous Pyrolysate of Herbaceous Peat with Different Water Medium

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Acta Geologica Sinica(English Edition) 2023年第6期97卷 1734-1743页

作者： DUAN yi WU yingzhong XING Lantian WU yingqin ZHAO Yang LI Zhongping MA lanhua DUAN Mingchen Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences and Gansu Provincial Key Laboratory of Petroleum ResourcesLanzhou 730000China Shaanxi Center of Mineral Geological Survey Xi'an 710068China College of Petroleum Engineering Liaoning Shihua UniversityFushunLiaoning 113001China Earthquake Research Institute of Lanzhou SSBLanzhou 730000China Business School Gansu University of Political Science and LawLanzhou 730070China

To investigate the influence of diagenetic water media on the hydrogen isotopes of individual sedimentary aromatic compounds,a series of hydrous pyrolyses were conducted on herbaceous peat.Polycyclic aromatic hydrocarbons(PAHs)in hydrous pyrolysed samples and their hydrogen isotopic composition characteristics were studied.The aqueous medium demonstrated a significant influence on the hydrogen isotopic composition of the individual PAHs generated during pyrolysis.The results showed that the PAHs formed after pyrolysis in the presence of a saltwater medium with high δD value from a salt lake had a heavy hydrogen isotopic composition.The PAHs formed after pyrolysis in the presence of a fresh water medium with low δD value from a swamp had a light hydrogen isotopic composition.The difference in the average PAHδD value between the two hydrous experiments varied from -174‰ to -109‰,suggesting that the hydrogen isotopic composition of individual sedimentary PAHs can reflect the source of the diagenetic water medium.In addition,a comparative study found that the hydrogen isotopes of PAHs were superior to those of n-alkanes in the same sample for diagenetic water indications.The results indicated that the exchange of water-derived inorganic hydrogen and organic hydrogen was more intensive in freshwater experiments than in saltwater experiments.With an increase in the simulation temperature,the average δD value of PAHs generated in the hydrous simulation experiments showed an increasing trend,reflecting that the δD value of sedimentary PAHs formed with the participation of diagenetic water media was still closely related to the thermal maturity of organic matter.Comparative studies showed that theδD values of different types of organic compounds produced by hydrous pyrolysis of peat were in the order,PAHs>n-alkanes>methane.

关键词： hydrogen isotope PAHs hydrous pyrolysis herbaceous peat water medium

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Acute toxicity assessment of drinking water source with luminescent bacteria: Impact of environmental conditions and a case study in Luoma Lake, East China

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Frontiers of Environmental Science & Engineering 2020年第6期14卷 201-209页

作者： Xuewen yi Zhanqi Gao lanhua Liu Qian Zhu Guanjiu Hu Xiaohong Zhou College of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China State Environmental Protection Key Laboratory of Monitoring and Analysis for Organic Pollutants in Surface Water Jiangsu Environmental Monitoring CenterNanjing 210036China State Key Joint Laboratory of ESPC School of EnvironmentTsinghua UniversityBeijing 100084China

Protecting the quality of lake watersheds by preventing and reducing their contamination is an effective approach to ensure the sustainability of the drinking water supply.In this study,acute toxicity assessment was conducted on the basis of acute bioluminescence inhibition assay using the marine bacterium Vibrio fischeri as the test organism and Luoma Lake drinking water source in East China as the research target.The suitable ranges of environmental factors,including pH value,organic matter,turbidity,hardness,and dissolved oxygen of water samples were evaluated for the toxicity testing of bioluminescent bacteria.The physicochemical characteristics of water samples at the selected 43 sites of Luoma Lake watershed were measured.Results showed that the variations in pH value(7.31-8.41),hardness(5-20°d)and dissolved oxygen(4.44-11.03 mg/L)of Luoma Lake and its main inflow and outflow rivers had negligible impacts on the acute toxicity testing of V.fischeri.The luminescence inhibition rates ranged from-11.21%to 10.80%at the 43 sites.Pearson's correlation analysis in the experiment revealed that temperature,pH value,hardness,and turbidity had no correlation with luminescence inhibition rate,whereas dissolved oxygen showed a weak statistically positive correlation with a Pearson correlation coefficient of 0.455(p<0.05).

关键词： Bioluminescent bacteria Acute toxicity Pearson correlation analysis Drinking water source Vibrio fischeri

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Diversity,Geography,and Host Range of Emerging Mosquito-Associated Viruses—China,2010–2020

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China CDC weekly 2021年第35期3卷 746-750,I0002,I0003,I0004页

作者： Yuan Fang Tian Hang Jinbo Xue Yuanyuan Li lanhua Li Zixin Wei Limin Yang yi Zhang National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention(Chinese Center for Tropical Diseases Research)NHC Key Laboratory of Parasite and Vector BiologyWHO Collaborating Centre for Tropical DiseasesNational Center for International Research on Tropical DiseasesShanghaiChina School of Global Health Chinese Center for Tropical Diseases ResearchShanghai Jiao Tong University School of MedicineShanghaiChina School of Publish Health Weifang Medical UniversityWeifangShandongChina.

Epidemics of emerging and neglected infectious diseases are severe threats to public health and are largely driven by the promotion of globalization and by international multi-border cooperation.Mosquitoborne viruses are among the most important agents of these diseases,with an associated mortality of over one million people worldwide(1).The well-known mosquito-borne diseases(MBDs)with global scale include malaria,dengue fever,chikungunya.

关键词： diseases mortality neglected

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Comparative Study of Hydrogen and Carbon Isotopic Composition of Gases Generated from the Pyrolysis of a Peat under Saltwater and Freshwater Conditions

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Acta Geologica Sinica(English Edition) 2018年第5期92卷 1879-1887页

作者： WU yingzhong DUAN yi ZHAO Yang CAO Xixi MA lanhua QIAN Yaorong LI Zhongping XING Lantian Key Laboratory of Petroleum Resources Gansu Province/Key Laboratory of Petroleum Resources ResearchNorthwest Research Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China School of Earth Science&Resources Chang'an UniversityXi'an 710054China University of Chinese Academy of Science Beijing 100049China College of Petroleum Engineering Liaoning Shihua UniversityFushun 113001LiaoningChina Admissions Office Lanzhou UniversityLanzhou 730000China Earthquake Research Institute ofLanzhou SSBLanzhou 730000China Analytical Chemistry Branch Office of Pesticide ProgramsUS EPA701 Mapes RdFort MeadeMD 20755-5350USA

To understand the influence of the diagenetic water medium on the isotopic compositions of thermogenic coalbed gas, both hydrous and anhydrous closed-system pyrolyses were performed at temperatures of 250°C to 650°C on an herbaceous marsh peat. Compared to the results of anhydrous pyrolysis, the hydrocarbon gases generated from hydrous pyrolyses have very different hydrogen isotopic compositions. However, the carbon isotopic compositions of the hydrocarbon gases became only slightly heavier in hydrous pyrolysis, compared to that from anhydrous pyrolysis. With the progress of thermal evolution from peat to a more advanced thermal maturity of vitrinite reflectance values（Ro） of 5.5% during the pyrolysis, the difference in the average δD value increased from 52‰ to 64‰ between the hydrous pyrolysis with saltwater and anhydrous pyrolysis and increased from 18‰ to 29‰ between the hydrous pyrolysis with freshwater and anhydrous pyrolysis, respectively. The difference in the average δ^（13）C value was only 1‰–2‰ between the hydrous and anhydrous pyrolysis. The relationships between the δD values of the generated hydrocarbon gases and Ro values as well as among δD values of the hydrocarbon gas species are established. The close relationships among these parameters suggest that the water medium had a significant effect on the hydrogen isotopic composition and a minimal effect on the carbon isotopic composition of the hydrocarbon gases. The results of these pyrolyses may provide information for the understanding of the genesis of coalbed gas from herbaceous marsh material with the participation of different diagenetic water media.

关键词： simulation experiment gas product hydrogen and carbon isotope diagenetic water medium influencing factor Xinjiang

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泥炭热模拟产物中多环芳烃及其氢同位素特征

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天然气地球科学 2023年第6期34卷 1065-1071页

作者：段毅吴应忠马兰花中国科学院西北生态环境资源研究院甘肃省油气资源研究重点实验室甘肃兰州730000 陕西省矿产地质调查中心陕西西安710068 国家地震局兰州地震研究所甘肃兰州730000

目前对于地质体中单体沉积芳烃化合物的氢同位素研究极为薄弱。研究对采自2个不同纬度地区的草本泥炭进行了无水热模拟实验。结果表明:2个地区泥炭热解的多环芳烃以菲及其烷基化合物为主要组分,并且低纬度泥炭热解的多环芳烃含有较多的... 详细信息

目前对于地质体中单体沉积芳烃化合物的氢同位素研究极为薄弱。研究对采自2个不同纬度地区的草本泥炭进行了无水热模拟实验。结果表明:2个地区泥炭热解的多环芳烃以菲及其烷基化合物为主要组分,并且低纬度泥炭热解的多环芳烃含有较多的芘系列和苯并芘多环芳烃。2个地区热解样品中甲基菲指数(MPI 1和MPI 2)值差别显著,但甲基菲比值(F1和F2)在2个地区热解样品中却较为接近。高纬度和低纬度地区泥炭热解的多环芳烃δD值分别在-142‰~-66‰和-103‰~-62‰之间,并且表现为高纬度地区泥炭热解的多环芳烃δD值低于低纬度地区炭热解多环芳烃的δD值。2个地区平均δD值差异在350℃和400℃时分别为-29‰和-16‰。高模拟温度热解的多环芳烃的氢同位素组成明显地重于低模拟温度热解的多环芳烃的氢同位素组成,反映了沉积多环芳烃δD值与有机质热成熟度密切相关。与相同样品中热解甲烷气体和正构烷烃的氢同位素组成相比较,热解多环芳烃的氢同位素组成最重。多环芳烃氢同位素组成与其分子量、碳数、环数和双键数具有一定的负相关性。这些研究成果为草本沼泽中形成的成煤物质的成因研究提供了新的多环芳烃氢同位素依据。

关键词：泥炭热模拟实验多环芳烃氢同位素组成去甲基化成熟度气候环境

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Sedimentary characteristics of paleo-aeolian dune sands of Salawusu Formation in the Salawusu River Valley

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Journal of Geographical Sciences 2008年第2期18卷 211-224页

作者： OU Xianjiao LI Baosheng JIN Heling DONG Guangrong David Dian ZHANG WU Zheng WEN Xiaohao ZENG lanhua OUYANG Chuntao YANG yi LIU Yufei School of Geography South China Normal University Guangzhou 510631 China State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment CAS Xi＇an 710061 China Department of Geography Jiaying University Meizhou 514015 China Cold and Arid Regions Environmental and Engineering Research Institute CAS Lanzhou 730000 China Department of Geography and Geology the University of Hong Kong Hong Kong China

The Salawusu Formation of Milanggouwan section in Salawusu River Valley includes 7 layers of paleo-mobile dune sands, and 4 layers of paleo-fixed and semi-fixed dune sands. Their structures have been observed and their grain size, surface textural features and several main chemical elements have been analyzed. The results showed that： 1） Some of the aeolian structural characteristics of these dune sands are similar to that of the recent dune sands. 2） They are also similar to the recent dune sands in grain size components, and parameters of Mz,σ, Sk and Kg, as well as in several main chemical components. 3） The scattergrams of Mz-σ and SiO2-Al2O3＋TOFE and the probability curves of grain size showed that these paleo-dune sands are different from paleosols and fluvio-lacustrine facies, but are consistency with recent dune sands. 4） Quartz sands have well roundness and surface textural features such as dish-shaped pits, crescent-shaped pits, pockmarked pits, upturned cleavage plates, siliceous precipitates and siliceous crevasses, indicating that they had been carried for a long time by the wind. As the 11 layers of paleo-dune sands possess the aeolian characteristics in structure, grain size, surface textural features and chemical elements, the origin of their formation should be attributed to eolation.

关键词： Salawusu River Valley Salawusu Formation paleo-aeolian dune sands aeolian sedimentary characteristics

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拮抗菌枯草芽孢杆菌1151及其所产抗菌肽对辣椒采后软腐病的控制作用

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食品与发酵工业 2023年第10期49卷 78-84页

作者：李广李晓芬易兰花西南大学食品科学学院重庆400715 西南大学食品贮藏与物流研究中心重庆400715

软腐病是导致辣椒采后贮运期间腐烂损失最严重的细菌性病害。为了降低辣椒因软腐病而造成的损失,该研究从腐烂辣椒中分离病原菌并筛选拮抗菌以控制该病原菌引起的软腐病。结果显示腐烂辣椒中分离的病原菌XC1为胡萝卜软腐病果胶杆菌巴西... 详细信息

软腐病是导致辣椒采后贮运期间腐烂损失最严重的细菌性病害。为了降低辣椒因软腐病而造成的损失,该研究从腐烂辣椒中分离病原菌并筛选拮抗菌以控制该病原菌引起的软腐病。结果显示腐烂辣椒中分离的病原菌XC1为胡萝卜软腐病果胶杆菌巴西亚种(Pectobacterium carotovorum subsp.brasiliense,Pcb),Pcb XC1具有强致病能力,104 CFU/mL及以上浓度在室温条件下(25℃)3 d内能够导致辣椒100%腐烂。进一步,采用双层琼脂平板法筛选出一株拮抗菌1151,经16S rDNA鉴定为枯草芽孢杆菌。体外抑菌结果表明枯草芽孢杆菌1151菌体及所产抗菌肽均对Pcb XC1有抑制作用。辣椒体内控病结果表明枯草芽孢杆菌1151菌体及所产抗菌肽均能降低辣椒的腐烂率并减小病斑直径,其中抗菌肽处理效果更佳。抗菌肽能够减少辣椒体内99%的Pcb XC1数量。扫描电镜结果也表明抗菌肽处理后的辣椒表面软腐病症更少,无明显细胞壁降解引起的褶皱和碎片。一方面从蛋白层面,经LC-MS/MS鉴定到了BHP、SP-B和Hb 98-114共3个抗菌肽。另一方面从基因层面,经BAGEL4数据库从枯草芽孢杆菌1151基因组中鉴定到了一个细菌素基因簇,含有2个细菌素(Subtilosin A和Subtilosin Sbox)。该研究表明枯草芽孢杆菌1151能够减轻辣椒由软腐病引起的腐烂损失,其所产抗菌肽发挥了重要作用,对辣椒采后的贮藏保鲜方法具有重要参考意义。

关键词：辣椒软腐病生物防治拮抗菌抗菌肽

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抗菌肽zp37抑制果汁中单核细胞增生李斯特菌的活性及其作用机制

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食品科学 2023年第5期44卷 29-37页

作者：任俊和曾平陈思睿易兰花西南大学食品科学学院重庆400715 香港中文大学药剂学院中国香港999077 重庆市开州区疾病预防控制中心重庆405499

单核细胞增生李斯特菌(简称单增李斯特菌)作为一种常见的食源性致病菌,是影响果汁食用安全性的主要威胁因子。本实验设计并获得一种抗菌肽zp37,通过测定抗菌肽zp37最小抑菌浓度(minimum inhibitory concentration,MIC),分析抗菌肽zp37... 详细信息

单核细胞增生李斯特菌(简称单增李斯特菌)作为一种常见的食源性致病菌,是影响果汁食用安全性的主要威胁因子。本实验设计并获得一种抗菌肽zp37,通过测定抗菌肽zp37最小抑菌浓度(minimum inhibitory concentration,MIC),分析抗菌肽zp37处理后单增李斯特菌的生长曲线、膜电位、膜完整性、细胞微观结构、细胞聚集率、DNA结合情况以及胞内活性氧等,研究抗菌肽zp37抑制果汁中单增李斯特菌的活性及其作用机制。结果表明,抗菌肽zp37对单增李斯特菌的MIC为16μg/mL,当其质量浓度大于4MIC时,单增李斯特菌生长受到明显抑制。同时,8MIC的抗菌肽zp37处理1h能杀死绝大部分的单增李斯特菌,且在7 d贮藏期内,2MIC的抗菌肽zp37能将草莓汁、猕猴桃汁和苹果汁中的单增李斯特菌控制到检测限以下。抗菌肽zp37处理后,单增李斯特菌细胞膜离子通透性增加、膜电位消失,细胞膜完整性被破坏,细胞出现明显的凹陷变形,细胞间发生聚集。荧光标记示踪法结果显示,抗菌肽zp37同时作用于单增李斯特菌的细胞膜和细胞质。在细胞质中,当抗菌肽zp37质量浓度大于DNA质量浓度的1/4时,两者会发生明显结合甚至导致DNA沉淀。此外,抗菌肽zp37能诱导单增李斯特菌产生活性氧,且与质量浓度成正比。综上,抗菌肽zp37对果汁中的单增李斯特菌抑制效果明显,本研究可为抗菌肽作为生物防腐剂应用于果汁提供一定的科学依据。

关键词：抗菌肽果汁单核细胞增生李斯特菌抑菌活性作用机制

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