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Water Determination in Liquefied Petroleum Gas using GC BID and Ionic Liquid Column Watercol™

Using Watercol™ GC columns in conjunction with GC-BID can provide a reliable and practical option for Water determination in petrochemical feedstocks.

原代细胞培养基础知识

什么是原代细胞？关于动物和人类原代细胞系和培养基的全面概述，以及它们如何应用于生物医学细胞培养应用。相对于细胞系，原代培养物的均一性较低。

胚胎培养基

用于转基因小鼠胚胎培养的小鼠胚胎培养基及经过胚胎培养验证的试剂

诱导多能干细胞分化方案

我们可提供大量用于控制人类iPSC细胞命运的细胞培养基、补充剂、生物活性小分子和生长因子。

新型无异种和无血清成骨分化培养基中人间充质干细胞的加速骨细胞分化

新型无血清、无异种人间充质干细胞（MSC）骨细胞分化培养基的开发。

癌症干细胞：癌症治疗的靶标

培养和表征CSC群体的癌症干细胞培养基、球状体培养板和癌症干细胞标志物。

细胞转染简介

转染是将DNA、RNA或蛋白质引入真核细胞的过程，用于研究和调节基因表达。因此，转染技术和实验方案作为分析工具，有助于表征遗传功能、蛋白质合成、细胞生长和发育。

无铜点击化学

无铜点击化学是点击化学的一种替代方法，可在较低的活化屏障下进行，且没有细胞毒性过渡金属催化剂。

交联剂选择指南

为您的生化或生物共轭研究选择合适的交联剂可能具有挑战性。我们的选择指南可以帮助您找到最适合您应用的交联剂。

SuFEx：参与下一步点击反应的磺酰氟

在与K. Barry Sharpless及其同事合作后，Sigma-Aldrich现可提供各种磺酰氟试剂，这些试剂经历了“Click II”反应。

用2-甲基吡啶-甲硼烷复合物进行还原胺化反应

2-甲基吡啶-甲硼烷（pic-BH3）是还原胺的一个出色的替代试剂。

C₂型轴对称手性双噁唑啉（BOX）配体

使用络合Cu(I)OTf的BOX配体进行不对称催化苯乙烯合成氮杂环丙烷的反应，BOX配体带苯基取代基的优于具有位阻需求的叔丁(t-Bu)基团。

金鸡纳生物碱

不对称相转移催化（PTC）已被公认为是许多均相合成有机转化的“绿色”替代方法，并且已被广泛应用。合成修饰的金鸡纳生物碱是用于不对称PTC的典型手性有机催化剂。

G3和G4 Buchwald预催化剂

G3和G4 Buchwald预催化剂是一类最新的空气、湿度和热稳定型交叉偶联复合物，可用于键形成以实现其多功能性和高反应性。

Salen配体

Salen配体：Jacobsen和Katsuki在1990年分别发表了第一篇关于salen作为锰的配体用于不对称环氧化反应的报道。

Renewable Electricity Toolkit

The Renewable Electricity Supplier Toolkit helps suppliers learn renewable electricity basics and how to bring projects to life.

Samplicity^® G2 Filtration System

Samplicity® G2 filtration system enhances HPLC workflow; watch video tutorials and application notes for effective sample preparation.

Analysis of Adulterated Lemon Essential Oil on the SLB-5ms

Citrus essential oils hold significant economic value. These intricate substances find primary use in the food, beverage, cosmetic, and perfume industries.

GC Analysis of a 37-Component FAME Mix on SP™-2560

A protocol for GC Analysis of a 37-Component FAME Mix on SP™-2560.

Capillary GC Columns for GC x GC

GCxGC excels in compound resolution, making it indispensable in analytical chemistry for complex samples.

Determination of Free and Total Glycerin in B100

Glycerin determination methods require multi-component calibration solutions for accurate analysis.

DRO, EPH, ETPH, GRO, PRO, PVOC, STARS, TPH, VPH? Help, I’m Trapped in Alphabet Soup!

There are three types of analyses: GRO, DRO, and TPH. The published methods are simply variations of these to meet the different analytical needs of the individual agencies.

EN 14105: GC Analysis of Glycerin Impurity in Biodiesel on MET-Biodiesel

Fast GC Analysis of Detailed cis/trans Fatty Acid Methyl Esters (FAMEs) on the 75 m SP™-2560 Capillary Column

Transforming the Biopharma Supply Chain and Analytics Capabilities with eData

An essential step in the progress towards Pharma 4.0 is the conversion of paper-based data to an electronic format, allowing it to be transferred, received, and available at the right time, in the right place, by those who need it.

Bioburden Control in Bioprocessing

Bioburden control in bioprocessing requires assessing the risks, mitigating the risks, and monitoring bioburden levels.

Membrane Prefilters Improve Sterilizing Filter Capacity and Process Economics in Bioprocessing

Prefilters can be used throughout bioprocessing to remove to remove particulates, improve quality and protect sterilizing filters and downstream unit operations.

Viral Safety in Bioprocessing

Viral safety in bioprocessing relies on a framework of (1) preventing contamination, (2) detecting contamination, and (3) removing or inactivating viral contaminants.

Sterilizing Grade Filtration Unit Operations for Plasmid DNA Processes

We discuss the final filtration step of plasmid DNA manufacturing and its key considerations and challenges. Download our free pDNA downstream purification eBook or ask our experts.

葡聚糖

葡聚糖是葡萄糖酐聚合物。它由大约 95% 的alpha-D-(1-6)键合组成。其余的 a (1-3) 键合构成了葡聚糖的分支。分支长度的冲突数据意味着平均分支长度小于三个葡萄糖单位。但是，其他方法表明存在大于 50 个葡萄糖单位的分支。

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