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TMB substrate

3,3'',5,5''-四甲基联苯胺(TMB)液体底物系统

公司名称: Sigma-Aldrich
产品编号: T0440
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Isolation of Rice Stripe Virus Preparation from Viruliferous Small Brown Planthoppers and Mechanic Inoculation on Rice
Author:
Date:
2017-11-05
[Abstract]   Tenuiviruses can infect the plants of the family Poaceae, and cause serious loss of crops, particularly rice and maize, in South-Eastern Asian countries. Tenuiviruses usually depend on insect vectors for their transmission and cannot be transmitted between plants through wounds or abrasions. Rice stripe virus (RSV), a typical member of tenuiviruses, is efficiently transmitted by the small brown planthopper Laodelphax striatellus in a persistent-propagative manner to cause rice stripe disease. Here we presented a convenient method, the midrib micro-injection, to mechanically ... [摘要]  细菌病毒可以感染禾本科植物,并在东南亚国家造成严重的作物损失,特别是稻米和玉米。 病毒通常依靠昆虫载体传播,不能通过伤口或擦伤传播。 水稻条纹病毒(RSV)是典型的tenuiviruses的成员,以持续繁殖的方式被小型褐飞虱灰飞虱高效率地传播,导致水稻条纹病。 在这里,我们提出了一种方便的方法,即中微量注射,以机械方式将昆虫来源的RSV接种到水稻叶中,以对水稻植物进行致病性测定。
【背景】除非通过根据不同的实验细节从1%至90%的完全不同的传输速率进行血管穿刺接种(Louie,1995; Hogenhout等人,2008),否则不能将机器接种到植物中。至于RSV,机械传播通常失败或产生低感染率(Ling,1972)。特别地,从病变植物注射RSV粗提物后,传播率仅为6%(Okuyama and Asuyama,1959)。在这项工作中提到的中微注射方法将RSV传播率提高到17%。虽然机械传播RSV的发生率仍远低于昆虫载体传播(53%),但是我们的方法为持续繁殖的植物病毒的机械接种提供了便利的方法。此外,基于这种方法,可以在受感染的植物宿主中更精确地确定持续增殖植物病毒的复制和基因表达,而不受昆虫即接种剂量和昆虫蛋白质的干扰。

In vitro Assays for Measuring Endothelial Permeability by Transwells and Electrical Impedance Systems
Author:
Date:
2017-05-05
[Abstract]  Vascular leakage is an important feature in several diseases, such as septic shock, viral hemorrhagic fever, cancer metastasis and ischemia-reperfusion injuries. Thus establishing assays for measuring endothelial permeability will provide insight into the establishment or progression of such diseases. Here, we provide transwell permeability assay and electrical impedance sensing assay for studying endothelial permeability in vitro. With these methods, the effect of a molecule on endothelial permeability could be defined. [摘要]  血管渗漏是脓毒性休克,病毒性出血热,癌症转移和缺血再灌注损伤等几种疾病的重要特征。因此,建立测定内皮通透性的测定将提供对这些疾病的建立或进展的洞察。在这里,我们提供transwell渗透性测定和用于研究体内内皮通透性的电阻抗感测测定。通过这些方法,可以定义分子对内皮通透性的影响。

背景 内皮屏障是一个良好调节的结构,其在正常生理条件下保持对流体和分子的最小和选择性渗透性(Komarova和Malik,2010)。内皮屏障的破坏在暴露于炎性细胞因子,病原体感染或癌症转移中发生,其诱导细胞骨架,细胞 - 细胞连接或细胞与基质附着的破坏。血管通透性的增加是许多疾病的重要特征,包括缺血再灌注损伤,败血症,病毒性出血热和癌症。为了筛选哪个分子调节血管通透性,有必要建立体外的体外试验以在扩张到动物研究之前测试内皮通透性。有两种可用的体外试验体外渗透性试验,transwell渗透性测定法和电阻抗检测装置(Bischoff等,2016)。 ...

Micro Neutralization (MN) Assay of Influenza Viruses with Monoclonal Antibodies
Author:
Date:
2016-06-05
[Abstract]  The human monoclonal antibodies generated from single human B cells were tested to characterize their ability to neutralize virus infectivity. The microneutralization assay is a highly sensitive and specific assay for detecting virus-specific neutralizing antibodies to influenza viruses. This protocol is to measure the ability of human monoclonal antibody to neutralize influenza virus by microneutralization assay. [摘要]  测试从单个人B细胞产生的人单克隆抗体,以表征其中和病毒感染性的能力。 微量中和测定法是用于检测流感病毒的病毒特异性中和抗体的高度灵敏和特异性的测定法。 该方案是测量人单克隆抗体通过微量中和测定中和流感病毒的能力。

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