全球疫苗免疫联盟CEO塞斯•伯克莱2014世界免疫周致辞
全球疫苗免疫联盟(GAVI)首席执行官塞斯•伯克莱博士在2014年世界免疫周的致辞。本视频由Health Talk授权播出。
克氏锥虫和Chagas病 - Norma Andrews P1
本视频由科普中国和生物医学大讲堂出品
Norma Andrews (U. Maryland) Part 1: Trypanosoma cruzi and Chagas’ Disease
Lecture overview:
Trypanosoma cruzi and Leishmania are closely related intracellular protozoan parasites that cause serious diseases throughout the world. In the first part of this lecture, I will present background material on the biology of Trypanosoma cruzi and the history of its discovery as an important agent of human disease in Latin America. I will also discuss the main characteristics of the disease, and the current efforts to stop human transmission.
In the second part of this lecture, I will present background material on Leishmania, the intracellular protozoan parasites responsible for severe human pathology in several parts of the world. I will discuss the main disease forms, the history of identification of the causative agent and form of transmission, and recent discoveries that established important concepts in our understanding of this increasingly serious infectious disease.
In the third part of this lecture, I will discuss current work from our laboratory on mechanisms used by the intracellular parasites Trypanosoma cruzi and Leishmania to interact with mammalian cells. In addition to clarifying specific molecular strategies used by these parasites to infect and survive within host cells, these studies also led, in some instances, to unexpected insights on novel pathways regulating mammalian cell function.
Speaker bio:
Norma Andrews is currently a Professor and Chair of the Department of Cell Biology and Molecular Genetics at the University of Maryland. She received a B.S. degree in biology (1977) and a Ph.D. degree in biochemistry (1983) from the University of São Paulo, Brazil.
In 1990, after completing postdoctoral studies in the laboratory of Victor Nussenzweig at New York University, she was appointed Assistant Professor at Yale University where she remained until 2010.
Andrews was a Burroughs Wellcome New Investigator, a Burroughs Wellcome Molecular Parasitology Scholar and recipient of a NIH MERIT Award. Her laboratory has made numerous contributions to the cell biology of host-pathogen interactions, and discoveries in this area have led to the identification and functional characterization of a novel pathway of Ca2+-regulated lysosomal exocytosis in mammalian cells.
分子克隆
分子克隆是将重组DNA插入到载体中的一套方法,载体作为DNA分子的携带者,将在宿主体内复制重组DNA片段。而DNA片段,可能是从原核或真核生物中分离得到一个基因。分离得到目的片段或称插入片段后,将其与载体用限制性酶切割并进行纯化。纯化后的片段通过一种叫做“连接”的技术连在一起。催化该连接反应的酶被称为连接酶。
本短片将按顺序介绍构成整个分子克隆操作过程的主要方法。并将讨论分子克隆技术的重要方面,例如分子克隆方案的必要性和如何追踪转化的菌落。也将提及其检测步骤,如用限制性酶切和测序来判断纯化的质粒中是否含有目的片段。
酵母的转化和克隆
酿酒酵母是在生物学研究中常用到的一种单细胞真核生物。在实验过程中,研究人员主要依靠转化(细胞摄取外源DNA)这一基本技术来控制基因表达,引入基因缺陷,表达重组蛋白和标记亚细胞结构。
本短片介绍在实验室里如何操作酵母转化和为何进行转化。我们将讲述酵母质粒的一些重要特性,以及处理酵母细胞接受新的质粒所需的步骤。短片还包括了用醋酸锂法转化酵母的详细步骤。最后是介绍一些这一基本技术的实际应用例子。
你的爱情观:放肆or克制
又逢七夕,摩拳擦掌,准备遭遇一场爱情?对于爱情,你怀着怎样的观念呢?是喜欢海枯石烂惊天动地随时准备献出全部的热血和整颗心脏?还是更愿意细水长流,让感情在平淡的岁月中慢慢积淀,最终渗入生活的细枝末节中不动声色?放肆OR克制,你的选择呢?“死生契阔,与子成悦。#执子之手,与子偕老”大多数人对爱情都怀着这样美好的期许。可是,爱情多变的面纱下到底隐藏着什么样的面孔?是乖巧的猫咪,还是会随时会扑向你,把你抓的遍体鳞伤的猛兽?你所理解的爱情又是什么样的呢?#哲学家杨·达拉利奥(Yann Dall' Aglio ) 探讨我们对温柔的普遍寻索,并谈论温柔与那日渐专注于个体世界中的暖昧关系。事实上,爱情这东西比你想象的简单得多。这是一个关于当代爱情的聪慧、有趣思考。
从泰坦尼克到微观世界
泰坦尼克号沉没100年后,关于这艘豪华游轮的故事还在流传,那么在搜寻泰坦尼克号残骸的过程中有哪些故事呢?是哪些水下探测技术帮助发现了泰坦尼克号呢?事件参与者之一、主讲人朱尔斯·杰斐博士将为大家揭秘,并展示他的实验室在深海微观探索中做的事情和取得的成绩。
赛默飞快速克隆解决方案
视频介绍Thermo Fisher Scientific最具优势的分子克隆产品及优化方案,助您更加快速和准确的完成分子克隆流程。我们将讨论包括传统酶切克隆方法,PCR和TOPO克隆及Gateway克隆方法。哪一种最适合您的应用?有哪些注意事项?如何提供克隆效率并缩短操作时间?
默克密理博Scepter手持式细胞计数器客户访谈
Scepter手持式细胞计数器设计精巧,计数精准,仅需14s即可获得直观的细胞数量/直径/体积等数据。视频中,来自国内著名研究院所的Scepter的实际使用者,根据日常使用亲身体验,阐述了Scepter在计数精确性、操作方便性、评估细胞健康状态的便捷性等方面,给细胞生物学相关应用带来的绝佳体验。对Scepter手持式细胞计数器感兴趣?请拨打400-889-1988-2分机预约样机展示或操作体验。
默克密理博SNAP id 2.0-WB 操作解析
SNAP id 2.0加速器可以用于Western Blot和IHC。采用真空抽滤来完成免疫杂交中的封闭-抗体孵育-漂洗的步骤,可以将操作时间从传统的4小时(至过夜)缩短至30分钟以内,极大地提高了操作通量和效率,避免了繁琐的手工处理带来的操作失误。本视频展示了SNAP id 2.0在Western Blot的膜封闭-漂洗-抗体孵育-漂洗的详细操作步骤。采用SNAP id 2.0加速器,实现1天2轮WB!