检索结果-南通市图书馆

Synthesis and characterization of optically active and organosoluble poly(amide-imide)s containing imidazole rings as pendent groups by direct polycondensation

引用

Science China Chemistry 2010年第3期53卷 580-586页

作者： KHALIL Faghihi MEISAM Shabanian Polymer Research Laboratory Department of ChemistryFaculty of ScienceIslamic Azad University Yang Researchers Club Islamic Azad University

Six new optically active poly(amide-imide)s(PAIs) 6a-f were prepared by direct polycondensation reaction of N-trimelli-tylimido-L-histidine 4 as a chiral diacid with various aromatic diamines *** phosphite(TPP)/pyridine(Py) in the presence of calcium chloride(CaCl2) and N-methyl-2-pyrrolidone(NMP) were successfully applied to direct polycondensation *** resulting new polymers were in good yields,and had inherent viscosities ranging between 0.29 and 0.41 dL g-1 and were detected with elemental analysis,FTIR,1H-NMR spectroscopy,specific rotation and differential scanning calorimeter(DSC),thermogravimetric analysis(TGA),and derivative of thermaogravimetry(DTG).Imidazole pendent groups of the polymer chains disturb interchain and intrachain interactions and make these PAIs readily soluble in polar aprotic solvents such as N,N-dimethylacetamide(DMAc),N,N-dimethylformamide(DMF),dimethylsulfoxide(DMSO),NMP and solvents such as sulfuric *** analysis indicated that the residual weight percents of polymers at 600 °C were between 56.47% and 68.76%,which show their thermal stability.

关键词： poly(amide-imide)s direct polycondensation optically active polymers imidazole histidine

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

Nonlinear Free Vibration of Reinforced Skew Plates with SWCNs Due to Finite Strain

引用

Advances in Applied Mathematics and Mechanics 2018年第6期10卷 1344-1364页

作者： S.Jafari Mehrabadi S.M.Nodeh Farahani Department of Mechanical Engineering Arak BranchIslamic Azad UniversityArakIran Department of Mechanical Engineering Kashan UniversityKashanIran

This paper is an attempt to investigate the nonlinear free vibration of skew plates reinforced by carbon nanotubes(CNTs)due to finite strain *** material properties of the nano-composite are estimated using the molecular dynamic results and the rule of ***,the differential equations governing the motions are derived on the basis of Classical Plate Theory(CPT)regarding the nonlinear Green-Lagrange strain *** order to solve the nonlinear equations,Galerkin’s method,Frechet derivative and differential quadrature method are *** effects of volume fraction of functionally graded materials(FGM),skew angle,distribution of CNTs and geometrical features of the plate on the nonlinear vibration of system have been *** results of this study have been compared with other researches and a good agreement has been achieved.

关键词： Finite strains nonlinear vibration skew plate carbon nanotubes functionally graded materials

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 aflatoxin B1 isolating potential of two lactic acid bacteria

引用

Asian Pacific Journal of Tropical Biomedicine 2013年第9期3卷 732-736页

作者： Adel Hamidi Reza Mirnejad Emad Yahaghi Vahid Behnod Ali Mirhosseini Sajad Amani Sara Sattari Ebrahim Khodaverdi Darian Department of Microbiology Razi Vaccine and Serum Research Institute Molecular Biology Research Center Baqiyatallah University of Medical Sciences Young Researchers and Elite Club Damghan BranchIslamic Azad University Department of Microbiology Dameghan BranchIslamic Azad University Applied microbiology research center baqiyatallah university of medical sciences Young Researchers and Elite Club Tonkabon BranchIslamic Azad University Department of Microbiology Science and research BranchIslamic Azad University Young Researchers and Elite Club Karaj BranchIslamic Azad University

Objective:To determine lactic acid bacteria's capability to enhance the process of binding and isolating aflatoxin B1 and to utilize such lactic acid bacteria as a food supplement or probiotic products for preventing absorption of aflatoxin Bl in human and animal ***:In the present research,the bacteria were isolated from five different *** surveying the capability of the bacteria in isolating aflatoxin Bl,ELISA method was implemented,and for identifying the resultant strains through 16S rRNA sequencing method,universal primers were ***:Among the strains which were isolated,two strains of Lactobacillus pentosus and Lactobacillus beveris exhibited the capability of absorbing and isolating aflatoxin Bl by respectively absorbing and discharging 17.4%and 34.7%of the aforementioned toxin existing in the experiment ***:Strains of Lactobacillus pentosus and Lactobacillus beveris were isolated from human feces and local milk samples,*** both strains has the ability to isolate or bind with aflatoxin Bl.

关键词： Mycotoxin Aflatoxin Lactic acid Bacteria ELISA test

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

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

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

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：