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Results for “TERPENES”

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PubMed1977

[Behaviour of intestinal goblet cells following application of oxidated water soluble terpenes. A pilot study (author's transl)].

1 and 3 h after i.p. application of Ozothin, an oxidation product of Bordeaux terpin oil, in rats there is a significant increase in goblet cells both totally and in the tightly filled ones (respectively in the villi of the small intestine). Double i.v. injection of therapeutic doses of Ozothin (first 14 h and booster 2 h preoperatively) induces a significant decrease in the number of the tightly filled goblet cells. These contradictory results may partly be explained as an initially timed ischesis of mucigenous glands by Ozothin. Statistically significant differences among the different series of tests could be found only in the epithelium of the villi. In the crypts there were similar results lacking statistical significance.

Adolescent↗
PubMed1982

[Percutaneous absorption of various terpenes - menthol, camphene, limonene, isoborneol-acetate, alpha-pinene - from foam baths (author's transl)].

The percutaneous absorptions of camphene, isoborneol-acetate, limonene, menthol and alpha-pinene as constituents of a foam bath (Pinimenthol) were measured on animals using radioactively labelled ingredients. Pharmacokinetic measurements showed maximum blood levels for all tested ingredients 10 min after the onset of percutaneous absorption. None of the ingredients was preferentially absorbed. Blood levels of all ingredients after 10 min of percutaneous absorption were a direct function of the size of the skin area involved.

Animals↗
PubMed2000

Measurements of concentration dependence and enantiomeric purity of terpene solutions as a test of a new commercial VCD spectrometer

Vibrational circular dichroism (VCD) spectra of (+)-alpha-pinene solutions in carbon tetrachloride have been measured in the range of volume fractions 5-100% (v/v) in the mid-infrared region. The concentration dependence measured was statistically analyzed with the aim of obtaining a reliable correlation between the VCD band areas and the concentrations of individual enantiomers. The quality of the spectra was estimated by means of noise spectra which were defined as half the difference of the two following blocks of scans. In addition to this, the enantiomeric purity was studied. This study was carried out for both (+)- and (-)-alpha-pinene enantiomers in the range of the percent enantiomeric excess in the interval 10-100%. The relationship between VCD intensity and enantiomeric purity was determined by least-square regression and statistically evaluated. All measurements performed in this study were intended as a basic tool for testing of a new commercial VCD setup from Bruker. Copyright 2000 Wiley-Liss, Inc.

Journal Article↗
PubMed2004

GC-MS characterisation and identification of natural terpenic resins employed in works of art.

Natural resins were frequently employed in the past as adhesives or as components of oleo-resinous media in paintings. The identification of vegetable resins is still an open problem. The aim of this paper is to analyse by GC-MS some vegetable resins frequently employed in paintings, such as Venice turpentine, dammar, copal, elemi, in order to identify their main components in samples both raw and aged. Some molecules are proposed as chemical markers to identify these natural resins. Two samples scraped off from XV and XVII century paintings were used to test the reliability of proposed method.

Biomarkers↗