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半微量比色皿,PS

Company: SARSTEDT
Catalog#: 67.742
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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. bacteriovorus, since the small size of this bacterium (0.25-0.35 by 0.5-2 μm) prevents scattering at OD600. Since these predatory bacteria require larger prey bacteria for growth (e.g., E. coli dimensions are

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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 ...

Whole-genome Identification of Transcriptional Start Sites by Differential RNA-seq in Bacteria
Author:
Date:
2020-09-20
[Abstract]  Gene transcription in bacteria often starts some nucleotides upstream of the start codon. Identifying the specific Transcriptional Start Site (TSS) is essential for genetic manipulation, as in many cases upstream of the start codon there are sequence elements that are involved in gene expression regulation. Taken into account the classical gene structure, we are able to identify two kinds of transcriptional start site: primary and secondary. A primary transcriptional start site is located some nucleotides upstream of the translational start site, while a secondary transcriptional start site is located within the gene encoding sequence.

Here, we present a step by step protocol for genome-wide transcriptional start sites determination by differential RNA-sequencing (dRNA-seq) ...
[摘要]  [摘要] 细菌中的基因转录通常起始于起始密码子上游的一些核苷酸。识别SPE cific Ť ranscriptional 小号挞小号ITE (TSS)为遗传操作必需的,因为在许多情况下,起始密码子上游有中涉及的基因表达调控序列元件。考虑到经典的基因结构,我们能够鉴定出两种转录起始位点:一级和二级。主要转录起始位点位于翻译起始位点上游的一些核苷酸上,而次要转录起始位点位于基因编码序列内。

这里,我们提出一步步协议全基因组吨ranscriptional 小号馅饼小号ITES d etermination通过差RNA测序(DRNA 使用肠道病原体-SEQ)福氏痢疾杆菌血清型菌株5A作为M90T模型。但是,该方法可以用于选择的任何其他细菌物种。第一步,使用热酚法从细菌培养物中纯化总RNA。核糖体RNA(rRNA)是使用商业试剂盒通过杂交探针特异性去除的。然后准备一个富含5'- 一磷酸依赖性核酸外切酶(TEX)处理的,富含初级转录本的RNA文库,用于与未进行TEX处理的文库进行比较,然后连接已知序列的RNA接头衔接子,从而确定具有单核苷酸精度的TSS。最后,对RNA进行处理以制备Illumina测序文库,并按购买的服务进行测序。通过内部生物信息学分析鉴定TSS。

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Fabrication and Use of the Dual-Flow-RootChip for the Imaging of Arabidopsis Roots in Asymmetric Microenvironments
Author:
Date:
2018-09-20
[Abstract]  This protocol provides a detailed description of how to fabricate and use the dual-flow-RootChip (dfRootChip), a novel microfluidic platform for investigating root nutrition, root-microbe interactions and signaling and development in controlled asymmetric conditions. The dfRootChip was developed primarily to investigate how plants roots interact with their environment by simulating environmental heterogeneity. The goal of this protocol is to provide a detailed resource for researchers in the biological sciences wishing to employ the dfRootChip in particular, or microfluidic devices in general, in their laboratory. [摘要]  该协议提供了如何制造和使用双流RootChip(dfRootChip)的详细描述,这是一种新型微流体平台,用于研究根管营养,根 - 微生物相互作用以及受控不对称条件下的信号传导和发育。 dfRootChip的开发主要是为了研究植物根系如何通过模拟环境异质性与环境相互作用。 该协议的目标是为希望在其实验室中特别使用dfRootChip或一般微流体装置的生物科学研究人员提供详细资源。

【背景】地下条件是高度异质和动态的,因此植物根部暴露于各种刺激,因此必须适应这种复杂的环境。尽管这些发展适应的重要性,但潜在的机制仍有待阐明。微流体装置已被证明可用于在受控的微环境中培养标本,并有助于从亚细胞到有机物水平的动态过程的实时成像(Crane 等人,,2010)。由于微流体可以以受控方式操纵小流体体积,以高通量进行实验,提取定量信息并进行延时测量,微流体装置已经进入了有机体研究。对于模式植物拟南芥,已经开发了一系列微流体装置,能够在根发育过程中监测基因表达(Busch et al。,2012),信号事件(Keinath et al。,2015)和基于传感器的营养摄取成像(Grossmann et al。,2011; Lanquar et al。, 2014)。此外,使用微流体平台的最新进展包括高分辨率表型分析(Jiang et al。,2014; Xing ...

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