Variability in the Chemical Composition of Human Skin Surface Lipids*
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چکیده
منابع مشابه
Variability in the composition of human skin surface lipids in tropical climates.
Skin surface lipid samples were collected by the hexane sponge technique from the foreheads of 180 male and 131 female Saudi subjects living in the Jeddah-Makkah area (summer temperatures up to 47 degrees C). The lipid samples were analyzed by densitometric thin layer chromatography. Seven major lipid classes were determined. The percentages for squalene, cholesterol esters, wax esters, triglyc...
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Detailed examinations have been made of the skin surface lipids and the lipids of the hair surface from human subjects (1, 2). These materials arc a mixture of indefinite proportions of sebum together with lipids derived from the keratinizing cells of the epidermis. Furthermore, the constituents of scbum or of the cpidermal lipids proper may be altered before or after they reach the surface. Gl...
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چکیده ندارد.
15 صفحه اولSkin Surface Lipids in Infants
The lipid on the surface of human skin is composed of wax esters and squalene from the sebaceous glands, cholesterol and cholesterol esters arising predominantly from the superficial epidermis, and glycerides plus free fatty acids from both sources. The activity of the sebaceous glands goes th rough a number of phases and is largely dependent on underlying endocrine factors. It is high immediat...
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The chemical composition of cork was determined, following a sampling that covered the whole production area in Portugal (29 provenances from six regions) with samples taken at cork stripping. To analyse between population variations, a more intensive sampling was made in two locations. The overall mean chemical composition of cork was: extractives 16.2% (dichloromethane 5.8%, ethanol 5.9%, wat...
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ژورنال
عنوان ژورنال: Journal of Investigative Dermatology
سال: 1969
ISSN: 0022-202X
DOI: 10.1038/jid.1969.157