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蛋白胨

公司名称: BD
产品编号: 211830
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Antimicrobial Sensitivity Assay for Bdellovibrio bacteriovorus
Author:
Date:
2020-12-20
[Abstract]  

Bdellovibrio bacteriovorus, an obligate predatory bacterium [i.e., bacteria that kill and feed on other bacteria (prey)], has the potential to be used as a probiotic for the disinfection of surfaces or for the treatment of bacterial infections. One option is to use this organism in combination with antimicrobials to potentiate the effectiveness of treatments. In order to make this approach feasible more has to be known about the ability of B. bacteriovorus to resist antibiotics itself. Standard assays to determine the minimum inhibitory concentration (MIC) are not suitable for B.

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[摘要]  [摘要]蛭弧菌弧菌,一种专性捕食细菌[即,细菌杀灭和进料的其它细菌(猎物)] ,有可能使被用作表面的消毒益生菌或细菌感染的治疗。一种选择是将这种生物体与抗菌素联合使用以增强治疗效果。为了使该方法可行,必须进一步了解细菌噬菌芽孢杆菌自身抵抗抗生素的能力。标准测定法来确定最小抑制浓度(MIC)是不适合B.弧菌,由于 的小尺寸该细菌(0.25-0.35由0.5-2的微米)防止在OD散射600 。由于这些细菌掠夺需要用于生长较大的捕食的细菌(例如,大肠杆菌(E.coli)尺寸为1由1-2微米),第这里描述的用于抗微生物敏感性测定方法E基础是OD的降低600期间引起的猎物裂解增长。以前关于掠食性细菌对抗菌素耐药性的研究采用的方法无法直接将抗菌素耐药性水平与其他细菌种类进行比较。在这里,我们描述了一种确定细菌对芽孢杆菌的抗药性的方法,该方法可与被测试的参照生物体尽可能接近相同的实验条件进行比较。简要地说,最低抑菌浓度(MIC)值的B.弧菌通过在存在和不存在不同浓度的抗微生物剂的混合捕食者/猎物培养物的600nm处测量的吸光度的减少来确定。值得注意的是,可以使用不同的条件,猎物细菌和/或抗菌剂来修改此方法以获得其他掠食性细菌的抗菌素MIC值。

[背景]噬菌蛭弧菌是一种革兰氏阴性细菌掠夺是“早”在其他革兰氏阴性细菌的物种,生长在他们的牺牲,并最终杀死它们。细菌噬菌芽孢杆菌以及其他掠食性细菌有潜力用作益生菌以消毒表面或治疗细菌感染(Tyson和Elizabeth ...

Preparation of Sequencing RNA Libraries through Chemical Cross-linking Coupled to Affinity Purification (cCLAP) in Saccharomyces cerevisiae
Author:
Date:
2018-10-05
[Abstract]  Ribonucleoprotein particles (mRNPs) are complexes consisting of mRNAs and RNA-binding proteins (RBPs) which control mRNA transcription localization, turnover, and translation. Some mRNAs within the mRNPs have been shown to undergo degradation or storage. Those transcripts can lack general mRNA elements, like the poly(A) tail or 5’ cap structure, which prevent their identification through the application of widely-used approaches like oligo(dT) purification. Here, we describe a modified cross-linking affinity purification protocol (cCLAP) based on existing cross-linking and immunoprecipitation ... [摘要]  核糖核蛋白颗粒(mRNP)是由mRNA和RNA结合蛋白(RBP)组成的复合物,其控制mRNA转录定位,转换和翻译。已显示mRNP内的一些mRNA经历降解或储存。那些转录物可能缺乏一般的mRNA元件,如poly(A)尾或5'帽结构,这通过应用广泛使用的方法如oligo(dT)纯化来阻止它们的鉴定。在这里,我们描述了基于现有的交联和免疫沉淀(CLIP)方法的修饰的交联亲和纯化方案(cCLAP),以分离mRNP中可被去腺苷酸化,去除和/或部分降解的mRNA,从而开启了检测不同的可能性。非编码RNA(ncRNA)的类型。分离后,将RNA进行衔接子连接,然后进行下一代测序(NGS)。由于快速有效的交联和淬灭步骤,该方案也适用于瞬时诱导的mRNP颗粒。实例包括由外在应激物触发的处理体(PB)或应力颗粒(SG)。其重现性和广泛应用使该方案成为研究特定RNP的RNA组成的有用且有力的工具。
【背景】mRNP内转录物的表征对于理解细胞转录和转录后过程至关重要。通过交联和免疫沉淀,然后通过RNA-Seq从mRNP颗粒中分离RNA已经成为鉴定mRNA靶标的常用方法(Tagwerker et al。,2006; Hafner et al。,2010; Kishore et al。,2011)。 ...

Ustilago maydis Virulence Assays in Maize
Author:
Date:
2016-03-20
[Abstract]  The basidiomycetous smut fungus Ustilago maydis (U. maydis) infects all aerial parts of its host plant maize (Zea mays L.). Infection symptoms are seen in the form of prominent tumors on all aerial parts of maize, after the establishment of a biotrophic interaction with the host usually around 5-6 days post infection (dpi). The fungus colonizes the various developmentally distinct aerial organs at different stages of development to form these prominent symptoms. Although being a biotrophic plant pathogen, U. maydis can easily be cultivated under axenic ... [摘要]  落叶青霉菌(Basidiomycetous smut fungus)Ustilago maydis( U。maydis )感染其宿主植物玉米的所有地上部分( Zea mays 感染症状在与宿主生物营养相互作用通常在感染后约5-6天(dpi)建立后以玉米的所有地上部分的突出肿瘤的形式见到。真菌在不同发育阶段定居各种发育不同的气生器官以形成这些突出的症状。虽然是一种生物营养性植物病原体, maydis 可以容易地在无菌条件下培养以产生标准化接种物。感染可以在实验室条件下通过注射器接种在玉米的所有气生器官上进行。该方案已经成功地用于感染玉米的所有气生器官并且在U中制定毒力测定。 maydis 使其成为研究植物病理学研究的优良模型系统(Schilling等人,2014; Redkar等人,2015)。

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