gas chromatography-mass spectrometry

Ethylchloroformate derivatization for GC-MS analysis of resveratrol isomers in red wine

Resveratrol (3,5,40-trihydroxystilbene) is a natural compound that can be found in high concentrations in red wine and in many typical foods found in human diet. Over the past decades, resveratrol has been widely investigated for its potential beneficial effects on human health. At the same time, numerous analytical methods have been developed for the quantitative determination of resveratrol isomers in oenological and food matrices.

Essential oil extraction, chemical analysis and anti-candida activity of calamintha nepeta (L.) Savi subsp. glandulosa (Req.) ball-new approaches

A comprehensive study on essential oils (EOs) extracted from different Calamintha nepeta
(L.) Savi subsp. glandulosa (Req.) Ball (CG) samples from Tarquinia (Italy) is reported. In this study,
the 24-hour steam distillation procedure for EO preparation, in terms of different harvesting and
extraction times, was applied. The GC/MS analysis showed that CG essential oils from Tarquinia
(TEOCG) belong to pulegone-rich chemotype. The analysis of 44 samples revealed that along

Correlation between chronological and physiological age of males from their multivariate urinary endogenous steroid profile and prostatic carcinoma-induced deviation

The biosynthesis of endogenous androgenic anabolic steroids (EAAS) in males varies with age. Knowledge of the general urinary EAAS profile's dependence from aging – not reported up to now – may represents a prerequisite for its exploitation in the screening and diagnostic support for several pathologies. Extended urinary EAAS profiles were obtained from healthy and pathological individuals, using a GC–MS method which was fully validated by a stepwise, analyst-independent scheme.

Antimicrobial testing of schinus molle (l.) leaf extracts and fractions followed by gc-ms investigation of biological active fractions

Schinus molle (L.) is a dioecious plant of the Anacardiaceae family, originating in South America and currently widespread in many regions throughout the world. In this work leaf extracts and derived low-pressure column chromatography (LPCC) fractions of S. molle L. male and female plants were investigated for the antimicrobial activity. Leaf extracts were tested on microbes Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Enterococcus faecalis, Candida albicans and Bacillus subtilis.

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