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Nunc 96 Well UV transparent plate

96孔UV微孔板

公司名称: Thermo Fisher Scientific
产品编号: 8404
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Determination of Boron Content Using a Simple and Rapid Miniaturized Curcumin Assay
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Date:
2018-01-20
[Abstract]  To determine boron quantity in soil, water and biological samples, several protocols are available. Colorimetric assays are the simplest and cheapest methods which can be used to determine boron concentration. However, published protocols do not give straightforward guidance for beginners to adopt these protocols for routine use in the laboratory. Based on a previously published available procedure, we present a detailed and modified version of a curcumin based colorimetric protocol to determine boron concentration extracted from any sample. Our modified protocol is able to determine up to ... [摘要]  为了确定土壤,水和生物样品中的硼含量,可以使用几种方法。 比色测定是可用于测定硼浓度的最简单且最便宜的方法。 然而,出版的协议并没有给初学者在实验室常规使用这些协议提供直接的指导。 基于以前发布的可用程序,我们提出了一个姜黄素比色协议的详细和修改版本,以确定从任何样品中提取的硼浓度。 我们修改的协议是能够确定在300微升的样本量为0.2纳摩尔的硼。


【背景】硼(B)可以用光谱和比色法进行定量。电感耦合等离子体质谱法(ICP-MS)是目前可用的最灵敏的方法,其检测极限为0.01mg / L(Kmiecik等人,2016),但需要5ml的样品体积。然而,这种技术需要复杂和昂贵的设备,这对小实验室来说是不可承受的。或者,使用姜黄素或偶氮甲碱-H染料的基于比色的测定法可以用于所有实验室中的硼的常规分析,可以使用可以测量550nm处的吸光度的分光光度计。 Bingham(1982)报道,姜黄素测定法比基于甲亚胺-H的测定法更有效。因此,我们提出了一个简单和快速的姜黄素检测方法的修改版本,以Wimmer和Goldbach(1999)最初发表的方案来定量B。我们已经使用这个协议来确定酵母细胞和拟南芥原生质体中的细胞内硼。此外,该协议还可用于研究硼在植物中的摄取,根和芽的易位机制。

Analysis of Starch Synthase Activities in Wheat Grains using Native-PAGE
Author:
Date:
2016-01-20
[Abstract]  Starch synthases are one class of key enzymes involving in the synthesis of cereal starch, which transfer glucose from ADP-glucose to the non-reducing end of pre-existing α-(1-4)-liked glucosyl chains of amylopectin. This protocol is highly reproducible for assaying activities for starch synthase I and IIIa in wheat and barley endosperm at qualitative level and quantitative level. The protocol includes separating proteins isolated from developing endosperm with native-PAGE containing glycogen from oyster, incubating protein gels with ADP-glucose solution, and staining gels with iodine ... [摘要]  淀粉合酶是涉及谷物淀粉合成的一类关键酶,其将葡萄糖从ADP-葡萄糖转移到预先存在的支链淀粉的α-(1-4) - 葡萄糖基链的非还原端。 这个协议是高度可重复的测定淀粉合成酶I和IIIa在小麦和大麦胚乳的定性水平和定量水平的活动。 该方案包括从发育的胚乳分离的蛋白质与来自牡蛎的含有糖原的天然PAGE,用ADP-葡萄糖溶液孵育蛋白质凝胶,并用碘溶液染色凝胶。 该方法允许研究人员比较淀粉合酶活性的水平或变化。

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