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Pipette tips, 1000 μL, Graduated, Natural

Company: FUKAEKASEI and WATSON
Catalog#: 110-706C
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Direct Visualization of the Multicopy Chromosomes in Cyanobacterium Synechococcus elongatus PCC 7942
Author:
Date:
2018-08-05
[Abstract]  Cyanobacteria are prokaryotic organisms that carry out oxygenic photosynthesis. The fresh water cyanobacterium Synechococcus elongatus PCC 7942 is a model organism for the study of photosynthesis and gene regulation, and for biotechnological applications. Besides several freshwater cyanobacteria, S. elongatus 7942 also contains multiple chromosomal copies per cell at all stages of its cell cycle. Here, we describe a method for the direct visualization of multicopy chromosomes in S. elongatus 7942 by fluorescence in situ hybridization (FISH). [摘要]  蓝细菌是进行含氧光合作用的原核生物。 淡水蓝藻 Synechococcus elongatus PCC 7942是用于研究光合作用和基因调控以及生物技术应用的模式生物。 除了几种淡水蓝藻, S. 细胞 7942在其细胞周期的所有阶段每个细胞还含有多个染色体拷贝。 在这里,我们描述了一种直接可视化 S中多拷贝染色体的方法。 通过荧光原位杂交(FISH)测定细菌 7942。

【背景】蓝藻是原核微生物,其利用与高等植物中的叶绿体类似的产氧光合系统。虽然 Escherichia coli 和枯草芽孢杆菌等细菌具有单个圆形染色体,但是几种淡水蓝细菌每个细胞有多个圆形染色体(Mann和Carr,1974; Labarre 等人,1989; Binder和Chisholm,1995)。淡水蓝藻 Synechococcus elongatus PCC 7942(以下简称 S.longatus 7942)每个细胞携带3-8个染色体拷贝(Griese et al。,2011; Watanabe et al。,2012; Watanabe et al。,2015)。已经建立了荧光报告子 - 操纵子系统来获取 S的多拷贝染色体的图像。 elongatus 7942(Chen et al。,2012; Jain et ...

Assessing Experience-dependent Tuning of Song Preference in Fruit Flies (Drosophila melanogaster)
Author:
Date:
2018-07-20
[Abstract]  In songbirds and higher mammals, early auditory experience during childhood is critical to detect and discriminate sound patterns in adulthood. However, the neural and molecular nature of this acquired ability remains elusive. Here, we describe a new behavioral paradigm with Drosophila melanogaster to investigate how the auditory experience shapes sound perception. This behavioral paradigm consists of two parts: training session and test session. In the training session, we keep the flies singly in a training capsule and expose them to training sound for 6 days after eclosion. After the training session, flies are subjected to the test session, in which the mating behaviors of flies are monitored upon sound playback. As the training and test sounds, we use two types of artificial ... [摘要]  在鸣禽和高等哺乳动物中,童年时期的早期听觉经验对于检测和区分成年期的声音模式至关重要。然而,这种获得能力的神经和分子性质仍然是难以捉摸的。在这里,我们描述了一种新的行为范式,用 Drosophila melanogaster 来研究听觉体验如何塑造声音感知。这种行为范式包括两部分:训练课程和测试课程。在训练期间,我们将苍蝇单独留在训练舱中,并在羽化后将其暴露于训练声6天。在训练期之后,果蝇经受测试期,其中在声音回放时监测果蝇的交配行为。当训练和测试声音时,我们使用两种类型的人造声音,它们对应于果蝇的同种和异种求爱歌曲的模式。通过应用这种方法,我们可以测量作为年轻成年人的同声歌曲的声学体验如何使歌曲偏好和配偶选择成为果蝇的繁殖成人。

【背景】为了成功交配,动物通过检测和优选物种特异性感觉信号来主动评估候选伴侣的交配。在高等动物中,出生后获得的先天本能和社会经验有助于交配偏好。事实上,在鸟类,鱼类,绵羊和山羊等物种中,先天偏好占主导地位,而后来与父母或兄弟姐妹的社交互动会微调表型歧视和交配偏好(Owens et al。,1999 ; Ten Cate和Vos,1999; Kozak et al。,2011)。

果蝇 Drosophila melanogaster ...

Quantification of Densities of Bacterial Endosymbionts of Insects by Real-time PCR
Author:
Date:
2017-10-05
[Abstract]  Increased attention has been paid to the endosymbiotic bacteria of insects. Because most insect endosymbionts are uncultivable, quantitative PCR (qPCR) is a practical and convenient method to quantify endosymbiont titers. Here we report a protocol for real-time qPCR based on SYBR Green I fluorescence as well as some tips to prevent possible pitfalls. [摘要]  昆虫的内共生菌已被越来越多的关注。 因为大多数昆虫内共生体是不可想象的,所以定量PCR(qPCR)是量子内分泌滴度的实用和方便的方法。 这里我们报告一个基于SYBR Green I荧光的实时qPCR协议,以及一些防止可能的陷阱的提示。
【背景】昆虫通常在其身体中存在各种分类群的细菌共生体。 这种细菌共生体(内共生菌)由于对宿主昆虫的深刻影响而引起了极大的关注。 一些细菌为其宿主提供必要的营养(Baumann等人,1995),一些赋予抗寄生虫的抗性(Oliver等人,2003; Hedges等人 ,2008),有些甚至操纵他们的主机的繁殖或性别决定为自己的利益(Werren等人,2008; Kageyama等人。 ,2012)。 因为大多数昆虫内共生体是不可复制的,所以定量PCR(qPCR)是量子内分泌滴度的实用和方便的方法(Simoncini等人,2001),可能由其他可视化方法补充,例如荧光 >原位杂交(FISH)(Koga等人,2009)和/或电子显微镜。

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