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Proline® Plus mechanical pipette, 1-ch, 0.5-10 µl

公司名称: Sartorius
产品编号: 728020
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Identification and Quantification of Secondary Metabolites by LC-MS from Plant-associated Pseudomonas aurantiaca and Pseudomonas chlororaphis
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Date:
2018-01-20
[Abstract]  Increased antibiotic resistance of plants and human pathogens and continuous use of chemical fertilizers has pushed microbiologists to explore new microbial sources as potential antagonists. In this study, eight strains of Pseudomonas aurantiaca and Pseudomonas chlororaphis, have been isolated from different plant sources and screened for their antagonistic and plant growth promoting potential (Shahid et al., 2017). All strains were compared with reference strain PB-St2 and their secondary metabolites were isolated by the use of solvent partitioning and subjected to ... [摘要]  哺乳动物正呼吸道病毒(呼肠孤病毒)利用成孔肽穿透宿主细胞膜。 在病毒进入过程中,这一步对于提供含核心颗粒的基因组至关重要。 该协议描述了用于测量呼肠孤病毒诱导的孔形成的体外测定。

【背景】呼肠孤病毒是无包膜的双链RNA病毒,其由两个同心蛋白质壳组成:内衣壳(核心)和外衣壳(Dryden等人,1993; Zhang等人, / ,2005; Dermody et al ,2013)。在附着之后,病毒颗粒被内吞(Borsa et al。,1979; Ehrlich et al。,2004; Maginnis et al。,2006; Maginnis和宿主组织蛋白酶蛋白酶降解σ3外壳蛋白(Chang和Zweerink,1971; Silverstein等人,1972; Borsa等人,et al。 1981; Sturzenbecker等人,1987; Dermody等人,1993; Baer和Dermody,1997; Ebert等人, 2002年)。这个过程产生一个亚稳中间体,称为感染性亚病毒颗粒(ISVP),其中细胞穿透蛋白μ1被暴露(Dryden等人,1993)。呼肠孤病毒ISVPs进行第二次构象改变以将含有基因组的核心沉积到宿主细胞的细胞质中。被改变的粒子被称为ISVP *(Chandran et al。,2002)。 ISVP-to-ISVP ...

Detection of Pathogens and Ampicillin-resistance Genes Using Multiplex Padlock Probes
Author:
Date:
2017-08-20
[Abstract]  Diagnostic assays for pathogen identification and characterization are limited either by the number of simultaneously detectable targets, which rely on multiplexing methods, or by time constraints due to cultivation-based techniques. We recently presented a 100-plex method for human pathogen characterization to identify 75 bacterial and fungal species as well as 33 clinically relevant β-lactamases (Barišić et al., 2016). By using 16S rRNA gene sequences as barcode elements in the padlock probes, and two different fluorescence channels for species and antibiotic resistance ... [摘要]  用于病原体鉴定和表征的诊断测定法由依赖于多重方法的同时可检测目标的数量或由于基于培养的技术的时间限制来限制。 我们最近提出了一种用于人类病原体鉴定的100plex方法,以鉴定75种细菌和真菌物种以及33种临床相关β-内酰胺酶(Barišić等,2016)。 通过使用16S rRNA基因序列作为挂锁探针中的条形码元件,以及用于物种和抗生素抗性鉴定的两种不同的荧光通道,我们设法将需要的微阵列探针的数量减少一半。 因此,我们在这里介绍一个运行时间约为的测定方案。 8 h,检测限为105 cfu ml-1。 正确鉴定了89%的β-内酰胺酶和93.7%的物种。
【背景】β-内酰胺酶是一类提供抗β-内酰胺抗生素的抗生素抗性基因,其结构模拟D-丙氨酰-D-丙氨酸,细菌细胞壁的一个组分,从而抑制细菌细胞壁合成。 β-内酰胺酶能够水解β内酰胺抗生素β-内酰胺环的中心成分,并使其无效(Kong et al。,2010)。今天,描述了超过1000种β-内酰胺酶,并且存在巨大的潜在环境储层(Bush,2010; Brandt等,2017)。 ...

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