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Hydrogen chloride – methanol solution

氯化氢 - 甲醇溶液

Company: Sigma-Aldrich
Catalog#: 17935
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Quantification of Bacterial Fatty Acids by Extraction and Methylation
Author:
Date:
2013-11-05
[Abstract]  This protocol describes two similar methods for the extraction and methylation of fatty acids from bacterial cultures. The acid derivatization protocol (Lennen et al., 2013; Bligh and Dyer, 1959) results in the extraction and methylation of all fatty acids, both free and bound, from a bacterial culture, while the base derivatization protocol (Lennen and Pfleger, 2013) captures only bound (phospholipid, acyl-thioester) species. After extraction into hexane, the lipids may be analyzed by gas chromatography. [摘要]  该方案描述了从细菌培养物中提取和甲基化脂肪酸的两种类似方法。 酸衍生化方案(Lennen等人,2013; Bligh和Dyer,1959)导致从细菌培养物中游离和结合的所有脂肪酸的提取和甲基化,而碱衍生化 方案(Lennen和Pfleger,2013)仅捕获结合的(磷脂,酰基 - 硫酯)物质。 在萃取到己烷中之后,可以通过气相色谱分析脂质。

Analysis of Flower Cuticular Waxes and Cutin Monomers
Author:
Date:
2013-09-20
[Abstract]  Here we describe procedures for the flower cuticular waxes extraction, modification and subsequent qualitative and quantitative analysis by gas-chromotography-mass spectrometry (GC-MS) and gas-chromotography with flame ionization detector (GC-FID), accordingly. To characterize flower cutin monomers two experimental setup are described: (i) analysis of enzymatically isolated cuticles in order to determine the relative proportions of cutin monomers; (ii) analysis of freeze-dried material for quantitative estimation of the cutin content. This report is an adaptation of the earlier published protocols developed for the chemical analysis of the cuticles in vegetative organs (Leide et al., 2007). [摘要]  在这里我们介绍花角质蜡提取,修改和随后的气相色谱 - 质谱(GC-MS)和气相色谱与火焰离子化检测器(GC-FID)的定性和定量分析的程序。 为了表征花角质单体,描述了两个实验装置:(i)分析酶分离的角质层,以确定角质单体的相对比例; (ii)冷冻干燥材料的分析,用于定量估计角质含量。 该报告是对早期公开的用于营养器官中角质层的化学分析的协议的改编(Leide等人,2007)。

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