检索结果-南通市图书馆

Layered bismuth oxide/bismuth sulfide supported on carrageenan derived carbon for efficient carbon dioxide electroreduction to formate

引用

Chinese Journal of Chemical Engineering 2022年第3期35卷 116-123页

作者： Xiangzhao Hu Junjie Sun wanzhen Zheng Sixing Zheng Yu Xie Xiang Gao Bin yang Zhongjian Li Lecheng Lei yang Hou Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of Zhejiang University-Quzhou Quzhou 324000China Department of Material Chemistry Nanchang Hangkong UniversityNanchang 330063China School of Biological and Chemical Engineering Ningbo Technology UniversityNingbo 315100China

Electrochemical reduction of carbon dioxide(CO_(2)ER)into formate plays a crucial role in CO_(2)conversion and ***,it still faces the problems of high overpotential and poor catalytic ***,we report a hybrid CO_(2)ER electrocatalyst composed of layered bismuth sulfide(Bi_(2)S_(3))and bismuth oxide(Bi_(2)O_(3))supported on carrageenan derived carbon(Bi-CDC)prepared by a combined pyrolysis with hydrothermal *** such 3 D hybrid,layered Bi_(2)O_(3)and Bi_(2)S_(3)are uniformly grown on nanocarbon *** from strong synergistic effect between Bi_(2)O_(3)/Bi_(2)S_(3)and nanocarbon,Bi-CDC-1:2 displays a high Faradic efficiency(FE)of>80%for formate production in the range of-0.9 V to-1.1 V with the maximum formate FE of 85.6%and current density of 14.1 mA·cm^(-2) at-1.0 ***,a positive onset potential of-0.5 V,a low Tafel slope of 112.38 mV·dec^(-1),and a slight performance loss during long-term CO_(2)ER tests are observed on Bi-CDC-1:*** results shows that the better CO_(2)ER performance of Bi-CDC-1:2 than that of Bi_(2)O_(3)can be attributed to the strong interfacial interactions between nanocarbons and Bi_(2)O_(3)/Bi_(2)S_(3).In situ ATR-FTIR measurements reveal that the rate-determining step in the CO_(2)ER is the formation of HCOO^(*) *** with carbon support,Bi-CDC-1:2 can promote the production of HCOO^(*) intermediate and thus promoting CO_(2)ER kinetic.

关键词： Nanomaterials Catalyst Selectivity Bi_(2)S_(3)/Bi_(2)O_(3) CO_(2)electroreduction Formate

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

Theoretical studies of vibrationally resolved absorption and emission spectra: From a single chromophore to multichromophoric oligomers/aggregates

引用

Science China Chemistry 2010年第2期53卷 297-309页

作者： GAO Fang LIANG wanzhen ZHAO Yi Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry Xiamen UniversityXiamen 361005China

Absorption and photoluminescence spectroscopies are useful tools to study the photo-physical properties of materials. The theoretical methods for calculation of the spectra of molecules/supermolecules and aggregates, whose structures can differ significantly, are reviewed from the viewpoint of computational efficiency. Several model compounds/multimers are taken as examples for the spectral calculations. The numerical results achieve a satisfactory agreement between the theory and experiment.

关键词： vibrationally resolved absorption and photoluminescence spectroscopies single chromophore multichromophoric oligomers aggregates time-dependent density functional theory(TD-DFT)

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

Onboard Laser Time Transfer Payload and Its Application for Chinese Navigation Satellites

Onboard Laser Time Transfer Payload and Its Application for ...

引用

第三届中国卫星导航学术年会

作者： Meng Wendong(1),Zhang Haifeng(1),Zhang Zhongping(1),Huang Peicheng(1),Wang Jie(2),Liao Ying(2),Ye yang(2),Hu Wei(2),Wang Yuanming(1),Chen wanzhen(1),yang Fumin(1),Ivan Prochazka(3) (1)Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai,20030 China (2)China Academy of Space Technology,Beijing,100094,China (3)Czech Technical University in Prague,115 19 Prague 1,Czech Republic

High-precision time synchronization between satellite and ground station plays the vital role in satellite navigation *** Time Transfer（LTT）technology is widely recognized as the highest accuracy way to achieve time synchronization derived from Satellite Laser Ranging（SLR）*** LTT payload has been designed and developed by Shanghai Astronomical Observatory,and successfully applied to Chinese navigation *** using the SLR system,with strictly controlling laser fire time and developing LTT data processing system on ground, the high precise onboard laser time transfer experiment has been first performed for satellite navigation system in the *** clock difference and relative frequency differences between the ground hydrogen maser and space rubidium clocks have been obtained,with the precision of approximately 300ps and relative frequency stability of *** article describes the development of onboard LTT payload,introduces the principle,system composition,applications and LTT measuring results for Chinese satellite navigation system.

关键词： navigation satellites time synchronization laser time transfer(LTT) measuring experiment,satellite laser ranging(SLR)

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Investigation on tribological behaviors of the modified UHMWPE with different structures of Schiff base copper complexes

引用

Science China(Technological Sciences) 2013年第12期56卷 3033-3039页

作者： WU Li GAO XinLei GAO wanzhen Key Laboratory for Green Chemical Process of Ministry of Education School of Chemical Engineering and Pharmacy Wuhan Institute of Technology School of Chemical and Environmental Engineering Wuhan Polytechnic University Wuhan Research Institute of Materials Protection

Investigation on the law of tribological modifying activity influenced by structure of additives will make prediction and design of materials tribological behaviors *** types of diamine Schiff base Cu(II)complexes as additives for modifying UHMWPE are synthesized,they are respectively:Cu(II)complex with ethlenediamion-N,N′-bis(salicylidene),Cu(II)complex with 1,6-hexanediamine-N,N′-bis(salicylidene),Cu(II)complex with 1,2-cyclohexanediamion-N,N′-bis(salicylidene)and Cu(II)complex with 1,2-phenylendiamion-N,N′-bis(salicylidene).Friction coefficient of the modified UHMWPE/Ti6Al4V is studied using a reciprocating friction and wear tester between line/surface contacts sliding in reciprocating under the condition of boundary lubrication with 25 vol% calf serum deionized water solution,at the same time volume loss of wear of the polymers is measured.3D topographies of the worn surfaces of the polymers and images of the worn surfaces of titanium alloys against the polymers are investigated respectively by CWLM and *** the structural unit R of Schiff base copper complexes in the modified UHMWPE influences their tribological modifying activity is also *** show that the smaller the group R is,the higher the modifying activity is obtained,and the open chain is more reactive than that of alkyl and aromatic ***,the Cu(II)complex with ethlenediamion-N,N′-bis(salicylidene)has the highest tribological modifying activity as its R group is the smallest and open.

关键词： UHMWPE tribological behaviors Schiff base Cu(II) complexes structure

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

[Zn4O] Cluster-Based Metal-Organic Frameworks as Catalysts for Conversion of CO2

引用

Chinese Journal of Chemistry 2019年第5期37卷 474-478页

作者： wanzhen Qiao Tianqun Song Bin Zhao College of Chemistry College of Chemistry Key Laboratory of Advanced Energy Material Chemistry MOE Nankai University Tianjin 300071 China Department of Chemistry Tianjin University Tianjin 300072 China

Summary of main observation and conclusion One unique two-dimensional (2D) Zn-MOF {Na[Zz1.5(μ4-O)(L)]}n (1) was synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction. Four Zn atoms are bridged through μ4-O to form [Zn4O] clusters, which are further linked to form a 2D layer n etwork through shari ng Zn as vertexes. 1 exhibits high thermal stability up to 280 ℃ and keeps stable in comm on solve nts and water solutions with pH ranging from 1 to 13. The catalytic studies reveal that compound 1 exhibits excellent catalytic activity for cycloaddition of CO2 with epoxides into cyclic carb on ates un der mild conditions. Furthermore, 1 dem on strates good gen erality in CO2 coupli ng reactio n with extensive epoxides. Importantly, 1 can be reused for at least five times without significant reduction in catalytic ability.

关键词： Zn4O ability

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

Systematic Contradiction Between Heritage Conservation and Tourism Development: Cleaning the Temple and Cemetery of Confucius and the Kong Family Mansion in Qufu

引用

Chinese Journal of Population,Resources and Environment 2007年第1期5卷 84-90页

作者： Wang Degang Sun wanzhen Department of Tourism Management Shandong University Jinan Shandong 250100 China

In recent years, with the rapid development of the tourist industry, world heritage sites become more and more popular among tourists from home and abroad. Therefore, heritage tourism has become a new hotspot. However, while world heri- tage sites are making obvious economic benefit from tourism, they also bring various problems and contradictions, of which the most troublesome one is the contradiction between heritage con- servation and tourism development. To discuss and analyze the root and the essence of the above contradiction and find a way to bring about harmony between them is an important program faced by our national heritage management practice and academic re- search. Based on the case of cleaning the Temple and Cemetery of Confucius and the Kong Family Mansion in Qufu, this paper ana- lyzes the reasons why our national world cultural heritage sites bring about the above contradiction in the process of tourism development and points out that the improper system and stake- holders’ benefit imbroglio are respectively the root and the es- sence of the contraction. Then, it also puts forward corresponding solutions.

关键词： tourism development heritage conservation system-atic contradiction cleaning the Temple and Cemetery of Confu-cius and the Kong Family Mansion in Qufu

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

炎症、营养指标与AECOPD患者合并低蛋白血症的相关性分析

引用

重庆医学 2024年第4期53卷 517-521页

作者：李凤刘海月林益华王佳怡杨菀臻郑怡萱甘仲霖西南医科大学公共卫生学院四川泸州646099 厦门大学附属第一医院检验科福建厦门361000 厦门大学附属第一医院呼吸与危重症医学科福建厦门361000 厦门大学公共卫生学院福建厦门361000

目的分析炎症、营养指标与慢性阻塞性肺疾病急性加重期(AECOPD)患者合并低蛋白血症的相关性。方法回顾性分析2020年1月至2022年9月在厦门大学附属第一医院呼吸与危重症医学科收治的AECOPD患者的病例资料,根据血清白蛋白(ALB)是否低于35 ... 详细信息

目的分析炎症、营养指标与慢性阻塞性肺疾病急性加重期(AECOPD)患者合并低蛋白血症的相关性。方法回顾性分析2020年1月至2022年9月在厦门大学附属第一医院呼吸与危重症医学科收治的AECOPD患者的病例资料,根据血清白蛋白(ALB)是否低于35 g/L分为低蛋白血症组(n=73)与非低蛋白血症组(n=141)。比较两组临床资料、炎症指标和营养指标,Spearman进行相关性分析,二元logistic回归分析AECOPD患者合并低蛋白血症的影响因素。结果两组患者年龄、住院时间、体重比较差异均有统计学意义(P0.05)。与非低蛋白血症组比较,低蛋白血症组的住院时间更长,C反应蛋白、中性粒细胞与白蛋白比值(NAR)、中性粒细胞与淋巴细胞比值(NLR)、血小板与淋巴细胞比值(PLR)和全身免疫炎症指数(SII)水平更高,预后营养指数(PNI)、体重指数(BMI)、血红蛋白、总蛋白水平更低,差异有统计学意义(P<0.05)。体重、BMI、血红蛋白、总蛋白、PNI与AECOPD患者合并低蛋白血症呈负相关(P<0.05),而年龄、住院时间、C反应蛋白、NAR、NLR、PLR、SII与AECOPD患者合并低蛋白血症呈正相关(P<0.05)。二元logistic回归分析显示,PNI、SII、NLR是AECOPD患者合并低蛋白血症的影响因素。结论在临床上应重视并及时纠正AECOPD患者的低蛋白血症状态,改善患者炎症指标和营养状况,预防急性加重。

关键词：慢性阻塞性肺疾病急性加重期低蛋白血症炎症营养

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Vibronic coupling effect on intersystem crossing rates of TADF emitters

引用

Chinese Journal of Structural Chemistry 2024年第6期43卷 22-24页

作者： Xin Huang Yi Zhao wanzhen Liang State Key Laboratory of Physical Chemistry of Solid Surfaces iChEMFujian Provincial Key Lab of Theoretical and Computational ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China

To take advantage of all the singlet and triplet excitons and then achieve 100%internal quantum efficiency in OLED devices,the scientists have proposed the thermally activated delayed fluorescence(TADF)strategy which tries to achieve"delayed"fluorescence by converting triplet excitons to singlet excitons through a reverse intersystem crossing(ISC/RISC)process with the help of thermal activation[1].In the early days,the efficient RISC processes were facilitated by a negligible energy gap(△E_(ST))and a large spin-orbit coupling(SOC)matrix element(SOCME)between the first singlet(S_(1))and triplet(T_(1))excited states.

关键词： coupling system emitter

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

Dynamic analysis of gene expression and determination of chemicals in agarwood in Aquilaria sinensis

引用

Journal of Forestry Research 2020年第5期31卷 1833-1841页

作者： Zeqing Wu wanzhen Liu Jing Li Liangwen Yu Li Lin College of Pharmacy Xinxiang Medical UniversityXinxiang 453003HenanPeople’s Republic of China College of Sports and Health Guangzhou University of Chinese MedicineGuangzhou 510006GuangdongPeople’s Republic of China College of Chinese Materia Medical Guangzhou University of Chinese MedicineGuangzhou 510006GuangdongPeople’s Republic of China

Agarwood is the resinous heartwood of Aquilaria ***,low yields and high costs of existing stimulation methods have led to the need for new techniques to produce agarwood rapidly and *** developed a biological agarwood-inducing technique(Agar-Bit)that produces high yields and quality within 6 *** better understand agarwood formation by Agar-Bit,dynamic gene expressions of key synthetases pathways of sesquiterpenes and chalcone-related enzymes at different times were determined after both Agar-Bit and the traditional burning chisel drilling(BCD)stimulation on Aquilaria sinensis *** qRT-PCR results show that some characteristic synthase genes were expressed at greatly different levels and times compared with the *** the Agar-Bit technology,main changes were after the 3rd or 5th month,while BCD expression clearly changed at the 5th *** oils and total chromone contents were simultaneously *** the Agar-Bit group,both were higher and similar to natural *** Agar-Bit methodology is a new option for producing agarwood as demonstrated by genetic and chemical *** differences in gene expression within 6 months for both groups indicates that the mechanisms of the two methods are *** findings provide information on genetic variation during the process of agarwood formation.

关键词： Agarwood Biological agarwood-inducing technique(Agar-Bit) Essential oils Gene expression Total chromone

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

引用

Journal of Integrative Agriculture 2024年第11期23卷 3788-3800页

作者： Chengdong yang Manfei Luo Xue Zhang Linlin Ye Ge Yu Yi Lü Yi Chen Taixu Chen Xuejian Wang wanzhen Feng Qinghe Chen School of Breeding and Multiplication(Sanya Institute of Breeding and Multiplication) Hainan UniversitySanya 572025China Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests of Ministry of Education School of Tropical Agriculture and ForestryHainan UniversityHaikou 570228China Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests Fuzhou 350013China

Litchi downy blight,caused by the plant pathogenic oomycete Peronophythora litchii,is one of the most devastating diseases on litchi and resulted in huge economic *** plays an essential role in the development and pathogenicity of the filamentous ***,the function of autophagy in oomycetes remain ***,an autophagy-related protein Atg3 homolog PlAtg3 was identified and characterized in *** absence of PlATG3 through the CRISPR/Cas9 gene replacement strategy compromised vegetative growth and sexual/asexual *** analyses revealed that the deletion of PlATG3 impaired autophagosome formation with monodansylcadaverine(MDC)staining and significantly disrupted zoospore release due to defects of sporangial cleavage with FM4-64 ***8 is considered to be an autophagy marker protein in various *** blot analysis indicated that PlAtg3 is involved in degradation of ***,PlAtg3 was unable to interact with PlAtg8 in yeast two hybrid(Y2H)assays,possibly due to the absence of the Atg8 family interacting motif(AIM)in ***,pathogenicity assays revealed that the deletion of PlATG3 considerably reduced the virulence of *** together,our data reveal that PlAtg3 plays an important role in radial growth,asexual/sexual development,sporangial cleavage and zoospore release,autophagosome formation,and pathogenicity in *** study contributes to a better understanding of the pathogenicity mechanisms of *** and provides insights for the development of more effective strategies to control oomycete diseases.

关键词： PlAtg3 sporangial cleavage autophagy pathogenicity Peronophythora litchii

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：