检索结果-南通市图书馆

PbS：Hg2＋ Nanostructures Films by Chemical Bath

材料科学与工程（中英文A版） 2013年第6期3卷 407-414页

作者： Marcial Zamora Tototzintle Salvador Rosas Castilla ruthmelendrez luevano Karina Barrios Hemaindez Jonathan Guzman Sotarriba Andres Camacho Yafiez Rey Baltazar Lopez Flores Leslie Chaltel Lima Oscar Portillo Moreno Facultad de Ciencias Quimicas Benemerita Universidad Autonoma de Puebla C.U. Puebla Puebla Pue. 72001 Mexico Facuhad de Ciencias de la Electronica Benemerita Universidad Autonoma de Puebla C. U. Puebla Puebla Pue. 72001 Mexico

The growth of nanocrystalline PbS films by chemical bath deposition （CBD） onto glass at temperatureT = 40 ± 2℃, is presented in this research. We report on the modification of structural, optical nanostructures due to in situ *** morphological changes of the layers were analyzed using AFM. XRD spectra displayed peaks at 20 = （26.00, 30.07, 43.10, 51.00, 53.48）, indicating growth on the zinc blende face. The grain size determined by x-rays diffraction of the undoped samples, was found -36 nm, whereas with the doped sample was 32-23 nm. Optical absorption, transition direct and indirect the forbidden band gap energy （Eg） shifts discloses a shift in the range 1.45-2.4 eV.

关键词： Thin films nanocrystals potential cell quantum confinement effect coordination complex.

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

Generation of natural killer cells from hematopoietic stem cells in vitro for immunotherapy

引用

Cellular & Molecular Immunology 2012年第4期9卷 310-320页

作者： Martha luevano Alejandro Madrigal Aurore Saudemont Anthony Nolan Research Institute and University College London Royal Free Campus London UK

Natural killer （NK） cells are part of the innate immune system and are an alluring option for immunotherapy due to their ability to kill infected cells or cancer cells without prior sensitization. Throughout the past 20 years, different groups have been able to reproduce NK cell development in vitro, and NK cell ontogeny studies have provided the basis for the establishment of protocols to produce NK cells in vitro for immunotherapy. Here, we briefly discuss NK cell development and NK cell immunotherapy approaches. We review the factors needed for NK cell differentiation in vitro, which stem cell sources have been used, published protocols, challenges and future directions for Good Manufacturing Practice protocols.

关键词： cord blood natural killer cells differentiation

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

Effects of Time Delays in a Dynamical Heart Model

引用

Journal of Chemistry and Chemical Engineering 2014年第3期8卷 320-323页

作者： Ricardo Paez-Hernfindez Maribel Zamora-Gomez Pedro Portillo-Diaz Delfino Ladino-Luna Ruben luevano-Enriquez Basic Sciences Department Metropolitan Autonomous University Campus Azcapotzalco Federal District 02200 M~xico Hospital General "Dr Gaudencio Gonzlez Garza" La Raza IMSS Federal District 02290 Mdxico

In this work, a dynamical model of the heartbeat is studied using nonlinear dynamics and considering the time delays inherent in the system. Two fixed points are associated to sustained oscillations which might be interpreted as the diastole and systole These parameters are associated with blood flow in human body called arterial pressure and are very important in the cardio-vascular diagnostic.

关键词：动力学模型心脏时滞非线性动力学时间延迟动脉血压持续振荡固定点

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

Transformation on CdCO3？CdO Thin Films under Annealing in Air Atmosphere

引用

材料科学与工程（中英文A版） 2013年第5期3卷 289-298页

作者： Ruth Melendrez luevano Tania Flores Papaqui Juan Carlos Ramirez Garcia Marcial Zamora Tototzintle Jorge R. Cerna Melissa Chivez Portillo Salvador Rosas Castilla Oscar Portillo Moreno School of Sciences Chemical Autonomous University of Puebla Puebla 72001 M~xico CIDS-ICUAP AutonomousUniversity of Puebla 72001 Puebla Mdxico

CdCO3 thin films had grown onto glass by chemical bath deposition (CBD), the temperature of the bath (Td) was at 20 °C. The samples were thermal annealed temperature (TAT) in air atmosphere at normal pressure for 2 h at different temperatures in the range of 300-400 °C, in order to perform the crystalline phase transformation from CdCO3→CdO, Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and optical absorption (OA) measurements were carried out to characterized the films. The proportion of constitutive elements measured by means SEM for CdCO3 as-grown were: Cd = 12.8, C = 20.0, O = 67.2; TAT (CdCO3) = 400 °C: Cd = 49.8, O = 50.2, this results indicates good stoichiometric of samples. Patterns XRD show the layer with CdCO3 which has rhombohedral crystallineas-grown peaks at: 2θ = [23.4, 30.2, 36.4, 40.1, 43.8, 48.0, 49.5, 49.9, 58.2, 61.7, 62.9 and 65.5]. TAT (CdCO3) = 400 °C completely disappeared and only peaks of CdO are identified. All of the peaks in this pattern has pure cubic phase of CdO (2θ= [33.1, 38.2, 55.3, 59.9 and 69.3]). The average grain size (GS) which was calculated from the main XRD peak by CdCO3 reduce of 34.5 nm reaching 20 nm respectively was calculated by employing Scherer"s formula. The optical absorption spectra allowed to calculate the values of forbidden bandgap energy (Eg), and hence, the evolution of Eg in the thermally spectra also showed the complete microstructural transformation from as-grown for samples with higher annealing. The critical point of CdCO3→CdO is proposed to occur at TAT = 400 °C, CdCO3 as-grown: Eg = 3.87 eV, TAT (CdCO3) = 400 °C (CdO): Eg = 2.31 eV.

关键词：氧化镉薄膜退火温度空气气氛扫描电子显微镜光谱计算薄膜生长 X-射线衍射平均晶粒尺寸

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

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

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：