نتایج جستجو برای: gas chromatography mass mineral elements

تعداد نتایج: 1061476  

2014
E. Rosier E. Cuypers M. Dekens R. Verplaetse W. Develter W. Van de Voorde D. Maes J. Tytgat

Differentiation between human and animal remains by means of analysis of volatile compounds released during decomposition is impossible since no volatile marker(s) specific for human decomposition has been established today. Hence, the identification of such a marker for human decomposition would represent great progression for the discovery of buried cadavers by analytical techniques. Cadaver ...

2011
Taina Ohra-aho Fernando J. B. Gomes

In this study, a large number of wood samples from several species of Eucalyptus, including E. grandis, E. urophylla, E. globulus, E. dunnii, E. camaldulensis and their crossing were characterized by pyrolysis-GC/MS method. All the measurements were done directly from the Eucalypus wood samples. S/G ratios were calculated for all guaiacyl and syringyl lignin pyrolysis derivatives. The results w...

Journal: :African journal of traditional, complementary, and alternative medicines : AJTCAM 2014
Davut Keleş Hatira Taşkin Gökhan Baktemur Ebru Kafkas Saadet Büyükalaca

BACKROUND The medicinal use of garlic is much older than its usage as a food. The medical importance of garlic comes forward for its sulfur-containing components. In this study, it was aimed to compare Kastamonu garlic type with Chinese garlic type based on their aroma profiles. MATERIALS AND METHODS Fresh Kastamonu garlic samples harvested from Kastamonu region of Turkey and Chinese garlic s...

Journal: :Journal of separation science 2010
Wenying Jian Richard W Edom Yaodong Xu Naidong Weng

Hydrophilic interaction chromatography (HILIC) provides a complementary separation mode to RPLC and thus has been gaining increased utilization in LC-MS/MS based quantitative bioanalysis. It has proven to be a powerful tool for separation of polar compounds and has afforded increased selectivity, higher sensitivity, and improved efficiency for quantitation of drug and their metabolites in compl...

Herbal Medicines are valuable natural resources that nowadays absorbed the attention of developed countries. Also this plants are using as raw materials to produce Low-risk and potent drugs for humans. One of these valuable species is the Cionura erecta shrub, distributed in a limited area of our country. The aim of this study is investigating the chemical composition of the essential oil of th...

Journal: :Drug metabolism and disposition: the biological fate of chemicals 2007
H A M Verheul C J Timmer M L P S van Iersel L P C Delbressine H J Kloosterboer

Levels of nonsulfated and sulfated tibolone metabolites were determined in plasma, urine, and feces from six ovariectomized, mature female cynomolgus monkeys after a single dose and multiple p.o. doses (including bile) of tibolone using validated gas chromatography/mass spectrometry and liquid chromatography/tandem mass spectrometry assays. In plasma, the predominant nonsulfated metabolite afte...

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