| Literature DB >> 14194098 |
Abstract
Thermal treatment of crystalline beta-carotene (240 degrees C in a vacuum) results in the formation of a volatile fraction containing chiefly aromatic hydrocarbons such as toluene, m- and p-xylene, 2,6-dimethylnaphthalene, and ionene. These compounds have been identified by means of gas-liquid chromatography, infrared spectroscopy, and, in the case of ionene, by additional nuclear magnetic resonance and mass spectroscopy. The principal degradation product is a yellowish-brown, glutinous mass which can be separated by means of preparative thin-layer chromatography in a number of fractions different in molecular weight. The structure of these fractions is not yet clear.Entities:
Keywords: CAROTENE; CHEMISTRY, ANALYTICAL; CHROMATOGRAPHY; EXPERIMENTAL LAB STUDY; HEAT; NAPHTHALENES; TOLUENE; XYLENE
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Year: 1964 PMID： 14194098 DOI： 10.1126/science.144.3618.533
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728