检索结果-南通市图书馆

Divergent responses of growth rate and antioxidative system of ten Bacillus strains to acid stresses

Soil Ecology Letters 2024年第1期6卷 107-118页

作者： Xiaoran Shan Jiayi Chen Jiaen Zhang Ziqiang liu Shufang Chen hui Wei Key Laboratory of Agro-Environment in the Tropics of Ministry of Agriculture and Rural Affairs Guangdong Laboratory for Lingnan Modern AgricultureCollege of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhou 510642China Guangdong Engineering Research center for Modern Eco-agriculture and Circular Agriculture South China Agricultural UniversityGuangzhou 510642China

Response of growth rate and antioxidative system of ten Bacillus strains to acid stresses was *** acid treatment significantly decreased the growth rate of the *** stresses increased the GPX activity and GSSG content of the tested *** changes occurred in ROS and antioxidative system(SOD,CAT,GR,MDA and GSH).Environmental changes including soil acidification exert obvi-ous stresses on soil ecosystems and influence soil *** this study,ten microbial strains were incubated under different acid treatments to investigate responses of microbial growth and antioxidative system to acid *** the strains belong to Bacillus genus,but exhibit distinct ecological *** observed that these microbial strains had obviously different pH tolerance threshold,in spite of the close phylogenetic classification among *** stresses exerted significant effects on microbial antiox-idative system,including superoxide dismutase(SOD),cata-lase(CAT)and glutathione transferring enzymes(GPX and GR)and reactants(GSH and GSSH),but the effects were strain ***,we found acid stress effects on total variances of the investigated microbial antioxidative system along the first two principal components(PCs).Activities of CAT and SOD contributed substantially to PC1 that reflected obvious acid effects on NC7 and ZC4,and closely related to intracellular malondialdehyde *** GSSG activities and GSH/GSSG contributed greatly to PC2 that unveiled acid stress effects on most of the microbial *** results highlight substantially heterogeneous responses of microbial strains to acid stress and support that phylogenetic closeness does not imply functional similarity of soil microorganisms under environmental changes.

关键词： soil acidification microbial strain acid tolerance capacity microbial growth oxidative stress antioxidative system

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High-performance fingerprint bionic Ecoflex@AgNW/graphite/Pt hybrid strain sensor

引用

Journal of Materiomics 2024年第1期10卷 7-16页

作者： Xuyang Zhang Zhengliang Li Cuilan liu Jiaqi Shan b Xingzhong Guo Xiaoyu Zhao Jianbao Ding hui Yang State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Hangzhou Global Scientific and Technological Innovation center Zhejiang UniversityHangzhou311200China Zhejiang Hua Display Optoelectronics Co. LtdJiaxing314115China Zhejiang Kechuang Advanced Materials Technology Co. LtdHangzhou310051China

Wearable electronics have promising applications in human-machine interfaces due to their excellent flexibility,stretchability and human friendliness,and one of the key points of wearable electronics is to develop strain sensors with high sensitivity and working ***,a high-performance Eco-flex@AgNW/graphite/Pt hybrid strain sensor was fabricated by suction filtrating,transferring and surface sputtering *** suction filtrating of AgNW and graphite dispersions on a wrinkle-shape Nylon filter,transferring of AgNW/graphite layer onto Ecoflex and further surface sputtering by Pt allow the construction of fingerprint bionic Ecoflex@AgNW/graphite/Pt hybrid strain *** resul-tant fingerprint bionic hybrid strain sensor possesses high sensitivity of 2064.1 at the strain of 140%e155%,a wide working range of 0e155%,a short response time(111 ms and 189 ms for tensile and releasing process)and excellent cyclic stability over 5000 *** study provides a universal tech-nique for the preparation of strain sensors with promising applications in the field of next-generation intelligent wearable electronics.

关键词： Silver nanowire Graphite Strain sensor Ecoflex Sensitivity Working range

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The study of two-color excitation upconversion of Pr(0.5)Yb(3):ZBLAN

引用

Science china(Physics,Mechanics & Astronomy) 2006年第2期49卷 169-177页

作者： CHEN Xiaobo1 & SONG Zengfu2 1. applied Optics Beijing Area Major Laboratory, Analysis and testing center, Beijing Normal university, Beijing 100875, china 2. Peking university, Physics School, Beijing 100871, china applied Optics Beijing Area Major Laboratory Analysis testing center Beijing Normal University Beijing 100875 China Physics School Peking University Beijing 100871 China

The excited state absorption upconversion of Pr(0.5)Yb(3):ZBLAN glass material, under two-color excitation of the 960 nm semiconductor laser and the Xe lamp light simultaneously, is reported in this article. It was found that the upconversion emission spectra of 480.1, 519.0, 601.9 and 631.8 nm coincide with the common emission spectra. Meanwhile, the upconversion-excitation spectrum has three obvious peaks under two-color excitation, and they respectively correspond to the 856.0 nm upconversion ex-citation transition [1G4(Pr3+)→1I6(Pr3+) and 1G4(Pr3+)→3P1(Pr3+)], the 789.0 nm upconver-sion excitation transition 1G4(Pr3+)→3P2(Pr3+), and the 803.7 nm upconversion excitation transition 3H6(Pr3+)→1D2(Pr3+). The upconversion excitation transition 1G4(Pr3+)→1I6(Pr3+) is strong because its oscillator strength f = 23.040×10?6 is large, which results in a large peak appearing in the upconversion excitation spectrum. That is just the new interesting two-color excitation upconversion luminescence phenomenon of Pr(0.5)Yb(3):ZBLAN induced by one laser and one continuous normal light simultaneously.

关键词： upconversion volumetric three-dimensional display two-color excitation.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Phase transfer-based high-efficiency recycling of precious metal electrocatalysts

引用

Green Chemical Engineering 2024年第1期5卷 68-74页

作者： Qing Zeng Shaonan Tian Yu Zhang hui liu Dong Chen Xinlong Tian Chaoquan Hu Jun Yang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing100190China State Key Laboratory of Marine Resource Utilization in South china Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou570228China Nanjing IPE Institute of Green Manufacturing Industry Nanjing211100China center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China

Recycling precious metals with high-efficiency is undoubtedly beneficial to optimize resource utilization for environmental remediation and sustainable ***,we report an efficient route to recycle the palladium(Pd)and platinum(Pt)electrocatalysts using a phase transfer *** strategy involves acidic dissolution of deactivated precious metal(Pd/Pt)electrocatalysts from their loading substrates,mixing with an ethanolic solution of dodecylamine(DDA),subsequent extraction of metal ions into a non-polar organic phase,and final reduction by sodium borohydride to reproduce high-performance electrocatalysts towards typical electrochemical reactions,e.g.,oxygen reduction reaction(ORR)and ethanol oxidation reaction(EOR).In specific,the transfer efficiencies are up to 98%and the final recovery rate is over 85%for Pd and Pt electrocatalysts in each *** approach symbolizes a facile and efficient way to recover precious metals,which might be applied to recycling a wide range of metals in various realms after appropriate modifications.

关键词： Precious metal Phase transfer Extraction Recovery Electrocatalyst

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Phase modulation of nickel-tin alloys in regulating electrocatalytic nitrogen reduction properties

引用

Rare Metals 2024年第6期43卷 2851-2858页

作者： Lin Wang Hang-Ning liu Xin Meng Chang-hui Sun Hai-Dong liu Liang-Yu Gong Zhen-Hua Yan Jie Wang College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural UniversityQingdao 266109China Department of Chemistry-Angstrom Laboratory Uppsala University75121UppsalaSweden Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Electrocatalytic nitrogen reduction reaction(NRR)is one of the attractive methods for ammonia(NH_(3))production at ambient conditions,but the catalytic performance largely depends on the physical properties of the ***,Ni-Sn alloy nanoparticles with well-controlled physical properties have been synthesized via a simple two-step method,which are applied as efficient electrocatalysts for the NRR.

关键词： alloys alloy nickel

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Insights into photocatalytic mechanism over a novel Cu_(2)WS_(4)/MoS_(2) S-scheme heterojunction

引用

Rare Metals 2024年第7期43卷 3118-3133页

作者： Wei Zhao Ji-hui Cao Jun-Jie Liao Yun liu Xiao-Jun Zeng Jun-Yu Shen Xue-Kun Hong Yang Guo He-Hua Zeng Ya-Zi liu School of Materials Engineering Jiangsu Key Laboratory of Advanced Functional MaterialsSchool of Electronic and Information EngineeringChangshu Institute of TechnologyChangshu215500China School of Chemistry and Chemical Engineering Changji UniversityChangji 831100China State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control Ministry of Ecology and EnvironmentNanjing Institute of Environmental SciencesNanjing 210023China School of Environment Jiangsu Engineering Lab of Water and Soil Eco-RemediationNanjing Normal UniversityNanjing 210023China Department of Chemical Engineering Curtin UniversityPerthWA6845Australia

A novel efficient Cu_(2)WS_(4)/MoS_(2) step-scheme(S-scheme)heterojunction photocatalyst was constructed for the first time and applied in the removal of environmental *** the as-prepared photocatalysts,the Cu_(2)WS_(4)/MoS_(2)-8%heterojunc tion photoc atalyst demonstrates the optimal photocatalytic performance,with the catalytic oxidation efficiency of tetracycline(TC)and the catalytic reduction efficiency of Cr^(6+)reaching 93.3%and 82.1%,*** excellent catalytic properties of Cu_(2)WS_(4)/MoS_(2) heterojunction photocatalysts are attributed to the effective separation pathways of charges and the presence of S-scheme heterojunctions,together with stronger redox *** is speculated that the photogenerated carrier migration path of the Cu_(2)WS_(4)/MoS_(2) catalyst follows the typical S-scheme photocatalytic mechanism,which is verified by the in-depth experimental study and simulated calculations including the electron paramagnetic resonance(EPR)analysis,free radical quenching experiments,charge density distribution,and simulated built-in electric field formation at the interface,which acts as driving force to promote the separation of photoinduced electrons and ***,the photocatalytic mechanism of S-scheme photogenerated carrier migration for the Cu_(2)WS_(4)/MoS_(2) catalyst is revealed based on the systematic experimental techniques and simulated calculations,accounting for its superior photocatalytic oxidation and reduction *** study provides inspiring implications to develop high-efficient S-scheme photocatalytic systems for versatile applications in solarenergy conversion.

关键词： Cu_(2)WS_(4)/MoS_(2) S-scheme Heterojunction Photocatalysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Large-Eddy Simulations of turbulent flows with lattice Boltzmann dynamics and dynamical system sub-grid models

引用

Science china(Technological Sciences) 2009年第3期52卷 670-679页

作者： GUAN hui1 & WU ChuiJie2 1 Research center for Fluid Dynamics, PLA university of Science and Technology, Nanjing 211101, china 2 School of Aeronautics and Astronautics, Dalian university of Technology, Dalian 116024, china Research center for Fluid Dynamics PLA University of Science and Technology Nanjing 211101 China School of Aeronautics and Astronautics Dalian University of Technology Dalian 116024 China

In this paper, two sub-grid scale (SGS) models are introduced into the Lattice Boltzmann Method (LBM), i.e., the dynamics SGS model and the dynamical system SGS model, and applied to numerically solving three-dimensional high Re turbulent cavity flows. Results are compared with those obtained from the Smagorinsky model and direct numerical simulation for the same cases. It is shown that the method with LBM dynamics SGS model has advantages of fast computation speed, suitable to simulate high Re turbulent flows. In addition, it can capture detailed fine structures of turbulent flow fields. The method with LBM dynamical system SGS model dose not contain any adjustable parameters, and can be used in simulations of various complicated turbulent flows to obtain correct information of sub-grid flow field, such as the backscatter of energy transportation between large and small scales. A new average method of eliminating the inherent unphysical oscillation of LBM is also given in the paper.

关键词： Large-Eddy Simulation Lattice Boltzmann Method dynamics sub-grid scale model dynamical system sub-grid scale model parallel computation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

具有约束的动态投入产出最优控制模型

引用

天津大学学报（自然科学与工程技术版） 2002年第3期35卷 384-388页

作者：亢京力毛云英杨正方天津大学理学院南开大学天津大学刘徽应用数学中心天津300072

研究了一类具有终端产出约束的动态投入产出问题的最优控制模型 ,分析了该模型最优控制的存在性和唯一性 .利用与其相应的无约束问题已有结论 ,把该模型最优控制的研究转化成一个较为简单的扰动模型最优控制的研究 ,利用罚函数法 ,推导... 详细信息

研究了一类具有终端产出约束的动态投入产出问题的最优控制模型 ,分析了该模型最优控制的存在性和唯一性 .利用与其相应的无约束问题已有结论 ,把该模型最优控制的研究转化成一个较为简单的扰动模型最优控制的研究 ,利用罚函数法 ,推导出扰动模型的最优反馈控制 .最终得到了具有终端产出约束最优控制问题的最优反馈控制 .实例仿真计算验证了结果的有效性 .

关键词：投入产出最优控制最优反馈控制转移矩阵

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Long time behavior for damped generalized coupled nonlinear wave equations. Ⅱ.Unbounded domain

引用

Communications in Nonlinear Science and Numerical Simulation 2001年第2期6卷 107-110页

作者： Shaomei FANG and Boling GUO Department of mathematics, Shaoguan university, Shaoguan 512005, china Graduate School, china Academy of Engineering Physics, Beijing 100088, china center for Nonlinear Studies, Institute of applied Physics and Computational Department of mathematics Shaoguan University Shaoguan 512005 China Graduate School China Academy of Engineering Physics Beijing 100088 China center for Nonlinear Studies Institute of Applied Physics and Computational mathematics Beijing 100088 China

In this paper, by using a priori estimates in the weighted space, the existence of the global attractor for the damped generalized coupled nonlinear wave equations in an unbounded domain is obtained.

关键词： unbounded domain weighted space attractor

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

SYNTHESIS,CRYSTAL　STRUCTURE　AND　MAGNETISM　OF　THE　COMPLEX:GdFe(CN)_64H_2O

引用

Chinese Chemical Letters 1995年第9期6卷 831-832页

作者： Jing Min SHI Dal Zheng LINO Peng CHENG Zong hui JIANG Geng Lin WANG(Department of Chemistry, nankai university, tianjin, 300071)xin Kan YAO Hong Gen WANG(center of Laboratory, nankai university, tianjin, 300071)

Abstract: a novel tlhree dimenslonal network complex polymer,namely, GdF6 (CN)6. 4H2O; has been synthesized from water solntion of gadollinium chloride and potassium ferricyanide, The complex erystalized in the monoclinie system, space group c2; with a=12. 759 (6) b=7. 404 (1). c=13. 564 (5) A,z=4. β=90. 22 (3), Mr=441. 33,De=2. 28g/cm2, μ(Mo Kcr)=38. 36cm-1, F (000)=832, R=0. 065 for 1048 independent observed reflections. The coordinated of Fe (111) ion and Gd (111) ion are distorted octahedron and 4-capped trigonal prism, respectively. The varible- temperature magnetlc suscepttbility of the complex was measured over 4.2-300K, giving the exchange intergral 2J=-138.2cm-1,and indlcation that a mediate antiferromagnetic spinsxchange interaction between the Fe (111) ions and the Gd (111) lons within oach binuclear unit.

关键词： CN SYNTHESIS,CRYSTAL COMPLEX MAGNETISM OF STRUCTURE AND

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：