Microcrystalline Cellulose Triacetate

By a heterogeneous acetylation procedure, cellulose can be acetylated so that the mutual arrangement of the carbohydrate chains within their crystalline regions is maintained. CTA obtained by this acetylation technique has only weak chiral recognition abilities. Only in its swollen state is triacetyl cellulose capable of separating enantiomers. An ethanol-water (95: 5, v/v) mixture is the most frequently used swelling agent for CTA. When dry CTA is boiled for 15 min in the ethanol-water mixture, a volume increase of about 40% is observed.

Microcrystalline CTA is a material that can be used to separate a broad variety of enantiomers belonging to many different classes of organic compounds (thiazoline-2 thiones, barbiturates, hydrocarbons, oxiranes, flavanones, y- and ¿-lactones, metal complexes, etc.) Its high loading capacity makes it an extremely useful material for preparative chromato-graphic purposes.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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