检索结果-南通市图书馆

国际压力与真空计量测试学术研讨会

作者： Santander L. A. Torres-Guzman J. C. Soriano J. B. centro nacional de metrologia (cenam Mexico) centro nacional de metrologia （cenam Mexico）Torres-Guzman J. C. centro nacional de metrologia （cenam Mexico）Soriano J. B centro nacional de metrologia （cenam Mexico）

＜正＞ The static expansion systems that are used to measure vacuum are considered primary standard systems. These systems are used to measure medium and high vacuum within the range of 1.10-5 Pa to 1.103 Pa absolute pressure. The centro nacional de metrologia （cenam, Mexico） has designed, constructed and characterized a primary system to be the vacuum national standard. This standard has been set up with the technical assistance of the Physikalisch Technische Bundesanstalt （PTB, Germany）.This paper presents the specifications of the system and the designing considerations in addition to some of the tests performed for its characterization. This constitutes the first primary standard for vacuum measurement in Latin America.

关键词：

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

Trypanosoma cruzi invasion in non-phagocytic cells:an ultrastructural study

引用

BIOCELL 2018年第3期42卷 105-108页

作者： Juan Agustín CUETO Emile SANTOS BARRIAS Wanderley de SOUZA Patricia Silvia ROMANO IHEM Universidad Nacional de CuyoCONICETLaboratorio de Biología de Tripanosoma cruzi y de la célula hospedadoraMendozaArgentina Universidad nacional de Cuyo.Facultad de Ciencias Médicas.Área de Biología Celular y Molecular.Mendoza.Argentina Universidad nacional de Cuyo.Facultad de Ciencias Médicas.Instituto de Fisiología.Mendoza.Argentina Laboratório de Ultraestrutura Celular Hertha Meyer Instituto de Biofísica Carlos Chagas FilhoCentro de Ciência da SaúdeUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil Instituto nacional de Ciência e Tecnologia em Biologia Estrutural e Bioimagens e centro nacional de Bioimagens-CENABIO Universidade Federal do Rio de JaneiroRio de JaneiroBrazil Instituto nacional de metrologia Qualidade e Tecnologia-InmetroRio de JaneiroBrazil

Trypanosoma cruzi is the causative agent of Chagas *** parasite requires the intracellular niche in order to proliferate and disseminate the *** invasion,*** resides temporarily in an acidic vacuole which is lysed by a not well-understood *** electron microscopy was used to describe the process of *** escape from the parasitophorous vacuole over the *** HeLa(non-professional phagocytic cells)as host cell,we observed that recently internalized parasites reside in a membrane-bounded vacuole.A few hours later,the first sign of vacuole disruption appeared as membrane *** observation was followed by a progressive vacuole swelling as evidenced by an electron-lucent halo between the parasite and the vacuole ***,the vacuole membrane remnants reorganized as small vesicles that eventually disappeared from the vicinity of the ***,parasites reach the host cell cytosol where replication takes *** thorough ultrastructural description of this process set the base for a comprehensive understanding of the parasite-host cell interaction and,thus open the possibility of new therapeutic intervention strategies.

关键词： Parasitophorous vacuole Pathogen Parasites Chagas disease Infectious diseases

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

Effect of Ultra-Turrax on Nanocellulose Produced by Acid Hydrolysis and Modified by Nano ZnO by Sol-Gel Method

引用

Materials Sciences and Applications 2020年第2期11卷 150-166页

作者： Amanda Ramos Aragao Melo Jose Carlos Dutra Filho Roberto Pinto Cucinelli Neto Wellington Silva Ferreira Braulio Soares Archanjo Raphael Verdan Curti Maria Ines Bruno Tavares Instituto de Macromoléculas Professora Eloisa Mano Universidade Federal do Rio de JaneiroBl J do Centro de TecnologiaIlh do FundaoRio de JaneiroRJBrasil Instituto SENAI de Inovacao em Biossintéticos e Fibras Universidade Federal do Rio de JaneiroRio de JaneiroBrasil Instituto de Biofísica Carlos Chagas Universidade Federal do Rio de JaneiroRio de JaneiroBrasil Divisao de metrologia de Materiais Instituto Nacional de MetrologiaQualidade e Tecnologia(INMETRO)Duque de CaxiasBrasil

Cellulose nanocrystals (NCC) and cellulose nanofibrils (CNF) were obtained by a single step process, with synergy between 64% sulfuric acid hydrolysis and high shear from ultra-turrax stirring, which is an advantageous process for disintegrating cellulose microcrystalline and also may improve the hydrolysis process. The surface modification on the cellulose was performed by the sol-gel process, in which the sulfate groups from hydrolysis were replaced by nanoparticles of zinc oxide, which led to the increase of up to 54°C Tonset, according to thermogravimetric analysis (TGA) results. The morphology and crystallinity degree were characterized by Helium Ion Microscopy (HIM), atomic force microscopy (AFM) and X-ray diffraction. In addition, the ZnO band was observed in Fourier transform infrared spectroscopy, furthermore, the change in the zeta potential confirmed the cellulose modification. The changes in the values of proton spin-spin relaxation time for the systems showing the confined hydrogen in the rigid domains, confirmed the results observed with the aforementioned techniques, for both cellulose after hydrolysis and ZnO modified cellulose, suggesting that ZnO disrupted crystal formation in cellulose.

关键词： Cellulose Nanocrystal Cellulose Nanofibril Nano Zinc Oxide Acid Hydrolysis Sol-Gel

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：