检索结果-南通市图书馆

Surface engineering of Zno electrocatalyst by N doping towards electrochemical Co_(2) reduction

Journal of Energy Chemistry 2024年第1期88卷 71-81,I0002页

作者： Rohini Subhash Kanase Getasew Mulualem Zewdie maheswari Arunachalam Jyoti Badiger Suzan Abdelfattah Sayed Kwang-Soon Ahn Jun-Seok ha Uk Sim Hyeyoung Shin Soon Hyung Kang Department of Interdisciplinary Program for Photonic Engineering Chonnam National UniversityGwangju 61186Republic of Korea Graduate School of Energy Science and Technology(GEST) Chungnam National University99 Daehak-roYuseong-guDaejeon 34134Republic of Korea Department of Chemistry Education and optoelectronic Convergence Research Center Chonnam National UniversityGwangju 61186Republic of Korea Department of Advanced Chemicals and Engineering Chonnam National UniversityGwangju 61186Republic of Korea School of Chemical Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea Department of Energy Engineering Korea Institute of Energy Technology(KENTECH)Naju 58217Republic of Korea

The discovery of efficient,selective,and stable electrocatalysts can be a key point to produce the largescale chemical fuels via electrochemical Co_(2) reduction(ECR).In this study,an earth-abundant and nontoxic Zno-based electrocatalyst was developed for use in gas-diffusion electrodes(GDE),and the effect of nitrogen(N)doping on the ECR activity of Zno electrocatalysts was ***,a Zno nanosheet was prepared via the hydrothermal method,and nitridation was performed at different times to control the N-doping *** an increase in the N-doping content,the morphological properties of the nanosheet changed significantly,namely,the 2D nanosheets transformed into irregularly shaped ***,the ECR performance of Zn o electrocatalysts with different N-doping content was assessed in 1.0 M KHCo_(3) electrolyte using a gas-diffusion electrode-based ECR *** the ECR activity increased after a small amount of N doping,it decreased for higher N doping *** them,the N:Zno-1 h electrocatalysts showed the best Co selectivity,with a faradaic efficiency(FE_(Co))of 92.7%at-0.73 V *** hydrogen electrode(RHE),which was greater than that of an undoped Zn o electrocatalyst(FE_(Co)of 63.4%at-0.78 V_(RHE)).Also,the N:Zno-1 h electrocatalyst exhibited outstanding durability for 16 h,with a partial current density of-92.1 ma cm^(-2).This improvement of N:Zno-1 h electrocatalyst can be explained by density functional theory calculations,demonstrating that this improvement of N:Zno-1 h electrocatalyst comes from(ⅰ)the optimized active sites lowering the free energy barrier for the rate-determining step(RDS),and(ⅱ)the modification of electronic structure enhancing the electron transfer rate by N doping.

关键词： Zno N-doped Zno Gas-diffusion electrode Co Selectivity Electrochemical Co_(2)reduction

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

An oxygenating colloidal bioink for the engineering of biomimetic tissue constructs

引用

Bio-Design and manufacturing 2024年第3期7卷 240-261页

作者： Seol-ha Jeong Jarno Hiemstra Patrick V.Blokzijl Rebeca Damian-Ferrara Danilo martins dos Santos Jéssica H.L.da Fonseca Min-Ho Kang Jihyun Kim Dilara Yilmaz-Aykut Mei L.L.Cham-Pérez Jeroen Leijten Su Ryon Shin Division of Engineering in Medicine Department of MedicineBrigham and Women’s HospitalHarvard Medical SchoolBostonMA 02139USA Leijten lab Department of Developmental BioEngineeringFaculty of Science and TechnologyTechnical Medical CentreUniversity of TwenteDrienerlolaan 57522 NB EnschedeThe Netherlands Nanotechnology National laboratory for Agriculture(LNNA) Embrapa InstrumentaçãoSao CarlosSao Paulo 13560-970Brazil Department of Biomedical-Chemical Engineering The Catholic University of Korea43 Jibong-roBucheon-siGyeonggi-do 14662Republic of Korea Department of Biotechnology The Catholic University of Korea43 Jibong-roBucheon-siGyeonggi-do 14662Republic of Korea

Ensuring a sufficient oxygen supply is pivotal for the success of bioprinting applications since it fosters tissue integration and natural *** in oxygen concentration among diverse tissues necessitates the precise recreation of tissue-specific oxygen levels in imprinted constructs to support the survival of targeted *** oxygen-releasing biomaterials,such as oxygen-generating microparticles(oMPs),have shown promise for enhancing the oxygen supply of microenvironments in injured tissues,whether this approach is scalable for large tissues and whether tissue-specific bioinks with varying oMP concentrations remain printable remain *** study addresses this critical gap by introducing an innovative class of engineered oxygenated bioinks that combine colloidal-based microgels with *** report that incorporating nanosized calcium peroxide(ncao_(2))and manganese oxide nanosheets(nMno_(2))into hydrophobic polymeric microparticles enables precise modulation of oxygen release while controlling hydrogen peroxide ***,the fabrication of oxygenating and cytocompatible colloidal gels is achieved using an aqueous two-phase *** study thoroughly evaluates the fundamental characteristics of the resulting bioink,including its rheological behaviors,printability,shape fidelity,mechanical properties,and oxygen release ***,this study demonstrates the macroscopic scalability and cytocompatibility of printed constructs produced via cell-laden oxygenating colloidal *** showcasing the effectiveness of extrusion-based bioprinting,this study underscores how it can be used to fabricate biomimetic tissues,indicating its potential for new *** findings presented here advance the bioprinting field by achieving scalability with both high cell viability and the possibility of mimicking specifically oxygenated *** work thereby offers a promising avenue for the development of functional tissues with e

关键词： 3D bioprinting Bioink Colloidal gels Extrusion printing oxygen-generating microparticle

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

Biodiversity responses to insular fragmentation in Amazonia: Two decades of research in the Balbina Hydroelectric Reservoir

引用

Zoological Research(Diversity and Conservation) 2024年第2期1卷 106-116页

作者： Ana Filipa Palmeirim maíra Benchimol Danielle Storck-Tonon Anderson SBueno Isabel LJones Gilmar Klein carlos APeres CIBIo Research Centre of Biodiversity and Genetic ResourcesInBIO Associated LabVairão CampusUniversity of PortoVairão 4485-661Portugal BIoPoLIS Program in Genomics Biodiversity and Land PlanningCIBIOVairão CampusUniversity of PortoVairão 4485-661Portugal laboratório de Ecologia AplicadaàConservação Universidade Estadual de Santa CruzIlhéusBahia 45662-900Brazil Programa de Pós-Graduação em Ambiente e Sistemas de Produção Agrícola(PPGASP) Universidade do Estado de Mato GrossoTangaráda SerraMato Grosso 78301-532Brazil Instituto Federal de Educação Ciência e Tecnologia FarroupilhaJúlio de CastilhosRio Grande do Sul 98130-000Brazil Biological and Environmental Sciences University of StirlingStirling FK94LAUK REBIo Uatumã/ICMBio Presidente FigueiredoAmazonas 69736-000Brazil Centre for Ecology Evolution and ConservationSchool of Environmental SciencesUniversity of East AngliaNorwich NR47TJUK JuruáInstitute ManausAmazonas 69057-060Brazil

As hydropower development expands across lowland tropical forests,flooding and concomitant insular fragmentation have become important threats to *** created insular landscapes serve as natural laboratories to investigate biodiversity responses to *** of these most iconic landscapes is the Balbina Hydroelectric Reservoir in Brazilian Amazonia,occupying>400000 ha and comprising>3500 forest ***,we synthesise the current knowledge on responses of a wide range of biological groups to insular fragmentation at *** has largely concentrated on a set of 22 islands and three mainland *** total,39 studies were conducted over nearly two decades,covering 17 vertebrate,invertebrate,and plant *** species responses varied according to taxonomic group,island area was consistently included and played a pivotal role in 66.7%of all studies examining patterns of species *** persistence was further affected by species traits,mostly related to species capacity to use/traverse the aquatic matrix or tolerate habitat degradation,as noted for species of vertebrates and orchid *** research is needed to improve our understanding of such effects on wider ecosystem *** Impact Assessments must account for changes in both the remaining habitat amount and configuration,and subsequent long-term species losses.

关键词： habitat loss Hydropower dams landbridge Local extinctions Species-area relationships Species diversity Tropical forests

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

Protection against Chemical Warfare Agents and Biological Threats Using Metal−organic Frameworks as Active layers

引用

Accounts of materials Research 2023年第2期4卷 168-179页

作者： Kaikai ma Yuk ha Cheung Kent o.Kirlikovali Xiaoliang Wang Timur Islamoglu John H.Xin omar K.Farha International Institute for Nanotechnology Institute for Sustainability and Energy at Northwesternand Department of ChemistryNorthwestern UniversityEvanstonIllinois 60208United States Research Centre for Smart Wearable Technology School of Fashion and TextilesThe Hong Kong Polytechnic UniversityKowloon 999077 Hong Kong SARP.R.China

The SARS-CoV-2 pandemic outbreak and the unfortunate misuse of toxic chemical warfare agents(CWAs)highlight the importance of developing functional materials to protect against these chemical and pathogen ***−organic frameworks(MoFs),which comprise a tunable class of crystalline porous materials built from inorganic nodes and organic linkers,have emerged as a class of heterogeneous catalysts capable of rapid detoxification of multiple classes of these harmful chemical or biological *** particular,zirconium-based MoFs(Zr-MoFs)feature Lewis acidic nodes that serve as active sites for a wide range of catalytic reactions,including the hydrolysis of organophosphorus nerve agents within seconds in basic aqueous *** addition,postsynthetic modification of Zr-MoFs enables the release of active species capable of reacting with and deactivating harmful *** this impressive performance,utilizing Zr-MoFs in powder form is not practical for application in masks or protective *** address this challenge,our team sought to develop MoF/fiber composite systems that could be adapted for use under realistic operating conditions to protect civilians,military personnel,and first responders from harmful pathogens and chemical warfare *** the last several years,our group has designed and fabricated reactive and biocidal MoF/fiber composites that effectively capture and deactivate these toxic *** this Account,we describe the evolution of these porous and reactive MoF/fiber composites and focus on key design challenges and ***,we devised a scalable method for the integration of Zr-MoFs onto textile substrates using aqueous precursor solutions and without using pretreated textiles,highlighting the potential scalability of this *** beyond standard textiles,we also developed a microbial synthesis strategy to prepare hierarchically porous MoF/bacterial cellulose nanofiber composite sponges that can both captu

关键词： composites protective porous

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

亚铁活化过硫酸盐体系对水体溶解性有机质分子转化的影响

引用

环境科学研究 2024年第8期37卷 1749-1759页

作者：曹惠真孙宗全沈佳伦王佳琪李晓东马福俊谷庆宝中国环境科学研究院土壤和地下水环境研究所北京100012 北京林业大学环境科学与工程学院北京100083

亚铁活化过硫酸盐(PS/Fe^(2+))高级氧化是修复有机污染水体的常用技术,在修复过程中会诱导水体中溶解性有机质(DoM)分子结构转变。为研究PS/Fe^(2+)体系中DoM的分子转化特性,选取腐殖酸(ha)、富里酸(FA)和天然有机质(NoM)3种不同种类的... 详细信息

亚铁活化过硫酸盐(PS/Fe^(2+))高级氧化是修复有机污染水体的常用技术,在修复过程中会诱导水体中溶解性有机质(DoM)分子结构转变。为研究PS/Fe^(2+)体系中DoM的分子转化特性,选取腐殖酸(ha)、富里酸(FA)和天然有机质(NoM)3种不同种类的DoM为研究对象,利用光谱和高分辨率质谱对比分析了PS/Fe^(2+)反应前后DoM的理化特性和分子结构特征。结果表明:①与热或碱活化PS体系相比,PS/Fe^(2+)反应后DoM芳香度、分子数和分子量显著下降。②反应后,DoM中残留了含C、H和o的木质素和单宁类物质,去除了o/CoM中的不饱和态分子(49.3%~94.0%),生成饱和态物质的数量、类型因DoM种类表现出明显差异。研究显示,PS/Fe^(2+)体系在自由基氧化与络合作用的共同介导下显著增加了DoM的分子转化程度,进而可能影响共存污染物的环境行为。

关键词：溶解性有机质(DoM) 亚铁过硫酸盐(PS) 高分辨质谱分子转化

来源：

维普期刊数据库

同方期刊数据库

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

Application of heat-activated peroxydisulfate process for the chemical cleaning of fouled ultrafiltration membranes

引用

Chinese Chemical Letters 2023年第10期34卷 116-120页

作者： Jiaqi Ding haoliang Xiao Xiaolong Huang Yujia Zou Zhimin Ye Songlin Wang Pengchao Xie Yongsheng Chen Jun ma Yangtze River Basin Ecological Environment Monitoring and Scientific Research Center Yangtze River Basin Ecological Environment Supervision and Administration BureauMinistry of Ecological EnvironmentWuhan 430010China School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Key laboratory of Water&Wastewater Treatment(HUST) MOHURDWuhan 430074China School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA 30332United States State Key laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

Na Cl o has been widely used to restore membrane flux in practical membrane cleaning processes,which would induce the formation of toxic halogenated *** this study,we proposed a novel heatactivated peroxydisulfate(heat/PDS)process to clean the membrane fouling derived from humic acid(ha).The results show that the combination of heat and PDS can achieve almost 100%recovery of permeate flux after soaking the ha-fouled membrane in 1 mmol/L PDS solution at 50℃ for 2 h,which is attributed to the changes of ha structure and enhanced detachment of foulants from *** properties of different treated membranes are characterized by scanning electron microscopy(SEM),atomic force microscope(AFM),attenuated total reflection Fourier transform infrared spectroscopy(ATRFTIR),and X-ray photoelectron spectroscopy(XPS),demonstrating that the reversible and irreversible foulants could be effectively removed by heat/PDS *** filtration process and fouling mechanism of the cleaned membrane were close to that of the virgin membrane,illustrating the good reusability of the cleaned ***,heat/PDS which can avoid the generation of halogenated byproducts shows comparable performance to Na Cl o on membrane cleaning and high performance for the removal of fouling caused by sodium alginate(SA),ha-bovine serum albumin(BSA)-SA mixture and algae,further suggesting that heat/PDS would be a potential alternative for membrane cleaning in practical application.

关键词： Chemical cleaning Peroxydisulfate Heat Membrane fouling Ultrafiltration

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

扁蕾化学成分的研究

引用

中成药 2022年第6期44卷 1850-1854页

作者：希古日干王图古拉宝钢图诺木拉哈利嘎苏达毕力格拉喜那木吉拉内蒙古民族大学蒙医药学院内蒙古通辽028000

目的研究扁蕾Gentianopsis barbata(Froel.) ma的化学成分。方法对扁蕾95%乙醇提取物采用硅胶、凝胶柱、制备液相色谱进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。结果从中分离得到12个化合物,分别鉴定为木犀草素(1)... 详细信息

目的研究扁蕾Gentianopsis barbata(Froel.) ma的化学成分。方法对扁蕾95%乙醇提取物采用硅胶、凝胶柱、制备液相色谱进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。结果从中分离得到12个化合物,分别鉴定为木犀草素(1)、1,7,8-三羟基-3-甲氧基口山酮(2)、1,7-二羟基-3,8-二甲氧基口山酮(2)、1-羟基-2,3,4,5,7-五甲氧基口山酮(4)、1-羟基-2,3,5-三甲氧基口山酮(5)、1-羟基-3,7,8-三甲氧基口山酮(6)、1-羟基-2,3,4,7-四甲氧基口山酮(7)、木犀草素-7-o-β-D-葡萄糖苷(8)、1-o-[β-D-吡喃木糖(1→6)-β-D-吡喃葡萄糖]-7-羟基-3,8-二甲氧基口山酮(9)、齐墩果酸(10)、獐牙菜苷(11)、马钱子苷(12)。结论化合物4、5、7、11、12均为首次从该植物中发现。

关键词：扁蕾化学成分分离鉴定

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

lanthanum elicitation on hypocrellin A production in mycelium cultures of Shiraia bambusicola is mediated by RoS generation

引用

Journal of Rare Earths 2019年第8期37卷 895-902,I0005页

作者： cansong Lu Yanjun ma Jianwen Wang College of Pharmaceutical Sciences Soochow University

Rare earth elements(REEs)have been widely applied as efficient elicitors to improve production of biologically important secondary metabolites in ***,their effects on microbial secondary metabolites were seldom *** this study,lanthanum(laCl3)was used as an elicitor in mycelium cultures of Shiraia bambusicola to stimulate the production of hypocrellin A(ha),a promising photosensitizer for anticancer photodynamic ***^3+at 1.0 g/L not only increases ha content by 2.50-fold in mycelia,but stimulates ha exudation to the medium with the highest production(225.05 mg/L)on day *** analysis shows that la^3+can induce the intracellular RoS(reactive oxygen species)accumulation with 2.33-fold higher contents of H2o2 in *** production induced by la^3+treatment can be suppressed by RoS *** analysis reveals that the elicitation of la^3+on ha accumulation is mediated by RoS generation to enhance expression of ha biosynthetical *** expression of ATP-binding cassette transporter gene(SbABC)for ha exudation is also regulated partially via RoS generated by NADPH *** results indicate that the enhanced ha production by la^3+might be mediated by RoS signaling *** results provide a basis for understanding REE elicitation on fungal metabolites and a practical biotechnological process for enhanced production of ha.

关键词： lanthanum Shiraia bambusicola Hypocrellin A Reactive oxygen species Elicitation Rare earths

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

Release of deposited Mno2 nanoparticles from aqueous surfaces

引用

Journal of Environmental Sciences 2020年第4期32卷 234-243页

作者： hainan Wang Ruixing Huang Chengxue ma Xiaoling Li caihong Liu Qiang He Zhengsong Wu Jun ma Xiaoliu Huangfu Key laboratory of Eco-environments in Three Gorges Reservoir Region Ministry of EducationCollege of Environment and EcologyChongqing UniversityChongqing 400044China Key laboratory of Water Supply and Sewage Engineering Ministry of Housing and Urban-Rural DevelopmentSchool of Civil EngineeringChang’an UniversityXi'an 710054China State Key laboratory of Urban Water Resource and Environment School of Municipal and Environmental EngineeringHarbin Institute of TechnologyHarbin 150001China

Changes in solution chemistry and transport conditions can lead to the release of deposited Mno2 nanoparticles from a solid interface,allowing them to re-enter the aqueous *** the release behavior of Mn02 nanoparticles from naturally occurring surfaces is critical for better prediction of the transport potential and environmental fate of Mn02 *** this study,the release of Mn02 nanoparticles was investigated using a quartz crystal microbalance with dissipation monitoring(QCM-D),and different environmental surface types,solution pH values and representative macromolecular organics were ***02 nanoparticles were first deposited on crystal sensors at elevated NaN03 concentrations before being rinsed with double-deionized water to induce their *** results reveal that the release rate of Mn02 depends on the surface type,in the decreasing order:Sio2>Fe304>Al2 o3,resulting from electrostatic interactions between the surface and ***,differences in solution pH can lead to variance in the release behavior of Mn02 *** release rate from surfaces was significantly higher at pH 9.8 that at 4.5,indicating that alkaline conditions were more favorable for the mobilization of Mn02 in the aquatic *** the presence of macromolecular organics,bovine serum albumin(BSA)can inhibit the release of Mn02 from the surfaces due to attractive *** presence of humic acid(ha)and sodium alginate(SA),the Mn02 nanoparticles were more likely to be mobile,which may be associated with a large repulsive barrier imparted by steric effects.

关键词： QCM-D Release kinetics Mno2 nanoparticles(Mno2 NPs) Solution pH Biomacromolecule

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

can phosphate compounds be used to reduce the plant uptake of Pb and resist the Pb stress in Pb-contaminated soils?

引用

Journal of Environmental Sciences 2009年第3期21卷 360-365页

作者： CHEN Shibao CHEN Li ma Yibing HUANG Yizong Ministry of Agriculture Key laboratory of Plant Nutrition and Nutrient Cycling and Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 China Institute of Plant Protection and Environmental Protection Beijing Academy of Agricultural and Forestry Science Beijing 100097 China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

The effects of different phosphate-amendments on lead （Pb） uptake, the activities of superoxide dismutase （SoD） and the level of malondialdehyde （MDA） in cauliflower （Brassica oleracea L.） in contaminated soils with 2500, or 5000 mg P2o5/kg soil of hydroxyapatite （ha）, phosphate rock （PR）, single-superphosphate （SSP） and the mix of ha/SSP （haSSP） were evaluated in pot experiments. Results showed that the Pb concentrations in shoots and roots decreased by 18.3%-51.6% and 16.8%-57.3% among the treatments respectively compared to the control samples. The efficiency order of these phosphate-amendments in reducing Pb uptake was as follows： haSSP= ha 〉 SSP ,= PR. With the addition of SSP, ha and the mix of ha/SSP, the SoD activity in shoot was reduced markedly （P 〈 0.05） compared with that in the control group. For example, the SoD activities in shoot by the treatments of haSSP, SSP, and ha in 5000 mg P2o5/kg were found to be only 51.3%, 56.2%, and 56.7%, respectively. Similar effects were also observed on the level of MDA in the shoots with a decrease in 24.5%-56.3%. The results verified the inference that phosphate compounds could be used to reduce the plant uptake of Pb and resist the Pb stress in the plant vegetated in Pb-contaminated soils.

关键词： phosphate amendments lead superoxide dismutase (SoD) malondialdehyde (MDA) contaminated soil

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：