检索结果-南通市图书馆

Application of organic manure as a potential strategy to alleviate the limitation of microbial resources in soybean rhizospheric and bulk soils

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第6期23卷 2065-2082页

作者： Zhimin Wu Xiaozeng han Xu Chen Xinchun Lu Jun Yan Wei Wang wenxiu Zou Lei Yan School of Resources and Environment Northeast Agricultural UniversityHarbin 150030China Key Laboratory of Mollisols Agroecology Northeast Institute of Geography and AgroecologyChinese Academy of SciencesHarbin 150081China Heilongjiang Academy of Agricultural Sciences Harbin 150086China

The development and vigor of soil microorganisms in terrestrial ecosystems are frequently constrained by the limited availability of essential elements such as carbon(C),nitrogen(N),and phosphorus(P).In this study,we investigated the impact of long-term application of varying levels of organic manure,low(7.5 Mg ha^(−1)yr^(−1)),moderate(15.0 Mg ha^(−1)yr^(−1)),and high(22.5 Mg ha^(−1)yr^(−1)),on the stoichiometry of enzymes and the structures of the microbial communities in soybean rhizospheric and bulk *** main goal of this research was to examine how soil microbial resource limitations in the rhizosphere respond to different long-term fertilization *** soil enzymatic activities were quantified,and the structure of the microbial community was assessed by analyzing phospholipid fatty acid *** compared to the bulk soil,the rhizospheric soil had significant increases in microbial biomass carbon(MBC),nitrogen(MBN),and phosphorus(MBP),with MBC increasing by 54.19 to 72.86%,MBN by 47.30 to 48.17%,and MBP by 17.37 to 208.47%.Compared with the unfertilized control(CK),the total microbial biomasses of the rhizospheric(increased by 22.80 to 90.82%)and bulk soils(increased by 10.57 to 60.54%)both exhibited increases with the application of organic manure,and the rhizospheric biomass was higher than that of bulk *** with bulk soil,the activities of C-,N-and P-acquiring enzymes of rhizospheric soil increased by 22.49,14.88,and 29.45%under high levels of organic manure,*** of vector length,vector angle,and scatter plots revealed that both rhizospheric and bulk soils exhibited limitations in terms of both carbon(C)and phosphorus(P)*** results of partial least-squares path modelling indicated that the rhizospheric soil exhibited a more pronounced response to the rate of manure application than the bulk *** varying reactions of rhizospheric and bulk soils to the extended application of organic manure underscore

关键词： enzymatic stoichiometry rhizosphere phospholipid fatty acids soybean organic manure

在线全文

学校读者我要写书评

暂无评论

推动经济实现质的有效提升和量的合理增长

宏观经济管理 2022年第12期 5-8页

作者：韩文秀中央财办

党的二十大报告提出,“推动经济实现质的有效提升和量的合理增长”。这充分体现了我们党推动高质量发展的坚定决心,为今后一个时期经济发展指明了方向。我们要全面贯彻党的二十大精神,完整、准确、全面贯彻新发展理念,坚持以推动高质量... 详细信息

党的二十大报告提出,“推动经济实现质的有效提升和量的合理增长”。这充分体现了我们党推动高质量发展的坚定决心,为今后一个时期经济发展指明了方向。我们要全面贯彻党的二十大精神,完整、准确、全面贯彻新发展理念,坚持以推动高质量发展为主题,把实施扩大内需战略同深化供给侧结构性改革有机结合起来,增强国内大循环内生动力和可靠性。

关键词：内生动力扩大内需战略新发展理念深化供给侧结构性改革高质量发展全面贯彻有效提升有机结合

Au nanoparticles based ultra-fast “Turn-On” fluorescent sensor for detection of biothiols and its application in living cell imaging

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第5期31卷 1083-1086页

作者： Hailiang Zhang Pengfei Xu Xintong Zhang Xiaozheng Cao wenxiu han Meihui Liu Xiaohui Liu Wenbin Zeng Xiangya School of Pharmaceutical Sciences Central South UniversityChangsha 410006China Institute of Clinical Pharmacy and Pharmacology Jining First People's HospitalJining Medical UniversityJining 272000China Yidu Central Hospital of Weifang Weifang 261000China

Au or other metal nanostructures have the ability to strongly quench the fluorescence of *** feature has made AuNP-conjugates attractive for the construction of platforms for various bioanalytes to overcome the limitations of small molecule fluorophores(poor solubility,long reaction time).In this paper,an ultrafast"Turn-On"fluo rescent sensor for biothiols was *** sensor is based on the fluorescent resonance energy transfer(FRET)effect between the fluorophore(PN)and AuNPs,which effectively quenches the fluorescence of the *** the presence of thiols,PN is displaced and released from AuNP surfaces,and thus,the fluorescence is rapidly *** sensor features appreciable water solubility and ultrafast response time(a few seconds for Cys).In addition,it exhibits high selectivity and a detection limit as low as 12 nmol/L for ***,the sensor presents good biocompatibility and has been successfully applied for imaging biothiols in living cells.

关键词： Gold nanoparticle FRET Biothiols Sensor Fluorescent imaging

A Capital Investment Appraisal Model Based Cognitive Influence Diagrams

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1996年第3期6卷 356-360页

作者： LIU Jinlan han wenxiu LI Guangquan(Tianjin University, 300072, China)

In this paper, we first analyse the shortcomings of existing investment appraisal methodologs, and present the theory of cognitive influence diagrams, which is constructed by integrating cognitive maps and influence diagrams. Simulation is used to solve the probabilistic inference by using the sample spare of each random variable involved in the analysis. A dynamic criterion is supposed based on the separable nature of value function. With this criterion. We combine influence diagrams with dynamic economic assessment. Thus the dynamic characteristics of investment proposal can be evaluated.

关键词： cognitive influence diagrams investment project dynamic appraisal.

Several Problems in the Development of Basic Disciplines

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1993年第1期3卷 47-56页

作者： CHEN Shijun, han wenxiu, LIU Shuhua, XU Xuejun Tianjin University, Tianjin, China

In this paper, several problems related to the development of basic disciplines are expounded from macroscopic visual angle. First, four important concepts(basic science, basic discipline, basic research, fundamental research) are analyzed. Then, reserve strength for the development of basic disciplines in China is considered in accordance with funds that have been put into basic research. Finally, several theoretical cognition problems concerning the development of basic disciplines (such as social function of science, motive force for the development of basic disciplines, as well as soft environment and cultural atmosphere favourable to it) are discussed.

关键词： basic science basic disciplines basic research fundamental research.

A Method of Problem Situation Decomposing to Support Goal Finding

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1996年第3期6卷 349-355页

作者： DING Ronggui han wenxiu(Institute of Systems Engineering, Tianjin University Tianjin, 300072, China)

DSS have been taken as hopfull supports tools for decision making for more than 20 years. There are a lot of literatures on DSS, but unfortunately most of them are not so practical as the designers expected. This paper points out the crux of this situation and argues that the research on DSS should pay some more attention to the decision making activities before the model using stage. A method named "Problem Situation Decomposing Graph (PSDG)" is presented in this paper for helping the decision maker (DM) elicite the problem systems. A PSDG is an acycle AND/OR logical directed graph, which includes all the factors, based on the DM’s knowledge, affecting the problem situation. The logical relationship and utility determining methods in a PSDG can reflect the DM’s decision making style. A method named "Critical Factor Method (CFM)" aided by a logical graph searching algorithm is used to analysis and derive the critical factors which the DM should take into account with priority, and thus supports him to find the decision making goals half artificially and half automatically.

关键词： Dss graph decision making problem goal.

Information　Flow　Analysis　and　Feedforward　Neural　Network　Methodin　R＆D　Project－Selection

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1994年第3期4卷 218-226页

作者： han wenxiu DING Ronggui Institute of Systems Engineering, Tianjin University, Tianjin 300072,China

R&D project-selection plays a very important role in R&D *** or not a R&D project is selected scientifieally will spell its success or *** a decision making R&D project-selection is characttrized by multiple procedues,multiple conflicting and noncommensurate objectives,and these characteristics make a numer of traditional approaches invalid or *** this paper,information flow and feedforward neural network method in R&D project-selection are pmentedi Through theoretical analysis,illustrative examples and computational simulation,we show that the proposed approach is preferable to the traditonal ones in many aspects.

关键词： R&D project-selection MCDM knowledge Artificial Intelligence network