Results 21 to 30 of about 94,683 (164)

Faster gas chromatography and its use in brewing. Part 2. - The determination of high volatile beer flavours after headspace extraction.

Kvasný průmysl, 2009
Using of faster gas chromatography is one way how the requirement of quick getting of results could be solved. Silica capillary columns with new size of internal diameter - 0.18 mm - are now available on the market. This study is focussed on applications
Tomáš HORÁK, Jiří ČULÍK, Marie JURKOVÁ, Pavel ČEJKA, Vladimír KELLNER, Josef DVOŘÁK, Danuša HAŠKOVÁ   +6 more
doaj   +1 more source

Determination_of D003 by capillary gas chromatography

Revista CENIC Ciencias Químicas, 2002
D003 is a mixture of saturated very long-chain fatty acids ranging from 24 to 36 carbon atoms, obtained from sugar cane (Saccharum officinarum L.) wax, with antiplatelet, 'antithrombotic, antioxidant and cholesterol-lowering effects .
David Marrero Delange, Ernesto Méndez Antolín, Víctor González Canavaciolo, Miriam O. Cora Medina, Abilio Laguna Granja   +4 more
doaj  

Application of some modern sample preparation procedures for quantitative determination of vicinal diketones in beer.

Kvasný průmysl, 2009
The measurement of the content of the vicinal diketones in beer is important because these compounds, especially diacetyl, give beer a buttery off-flavour in concentrations above the flavour threshold.
Tomáš HORÁK, Jiří ČULÍK, Marie JURKOVÁ, Pavel ČEJKA, Vladimír KELLNER   +4 more
doaj   +1 more source

Chemical Analysis of the Herbal Medicine Salviae miltiorrhizae Radix et Rhizoma (Danshen)

Molecules, 2016
Radix Salviae miltiorrhizae et Rhizoma, known as Danshen in China, is one of the most popular traditional Chinese medicines. Recently, there has been increasing scientific attention on Danshen for its remarkable bioactivities, such as promoting blood ...
Hanqing Pang, Liang Wu, Yuping Tang, Guisheng Zhou, Cheng Qu, Jin-ao Duan   +5 more
doaj   +1 more source

PENENTUAN KADAR KOLESTEROL DENGAN METODE KROMATOGRAFI GAS

Agrointek, 2016
The methods for quantitative determination of cholesterol in foods by chromatography determination Two types of lipid classes including free cholesterol and cholesterol ester exist in food.
Laila Khamsatul Muharrami
doaj  

Capillary electrochromatography applied to the separation of enantiomers utilizing packed capillary columns with silica-vancomycin. A tutorial

Journal of Chromatography Open
The separation and analysis of chiral compounds is an important topic in various fields such as research, pharmaceutical industry, food control, agrochemistry, biochemistry, forensics and toxicology, etc.
Chiara Fanali, Giovanni D'Orazio
doaj   +1 more source

Studies on changes in patterns of fatty acids, sterols and tocopherols of oil during seed maturation of oil crops. Part I. Sunflower seeds

Grasas y Aceites, 1994
The variation of lipid constituents in maturing sunflower oil seeds has been investigated with the aim of determination of the proper harvesting time as well as the oil quality.
S. M. El-Shami, M. M. Hassanein, T. Murui, M. Hassan El-Mallah   +3 more
doaj   +1 more source

Synthesis and stereochemical determination of diunsaturated valproic acid analogs including its major diunsaturated metabolite.

Journal of Lipid Research, 1985
Valproic acid, an antiepileptic drug, is transformed into diunsaturated metabolites in humans. Synthesis of the geometric isomers of 2-(1'-propenyl)-2-pentenoic acid and 2-(1'-propenyl)-3-pentenoic acid was attempted using known procedures.
A Acheampong, F S Abbott
doaj   +1 more source

Amino Acid Analysis by Capillary Gas Chromatography

Journal of AOAC INTERNATIONAL, 1987
Abstract Two developments have enabled major advancements in the use of capillary gas chromatography (GC), the result being its much more widespread use in investigations on a broad range of chemical and biological problems. The 2 technological developments were the introduction of fused silica capillary columns and the development of ...
R W, Zumwalt, J, Desgres, K C, Kuo, J E, Pautz, C W, Gehrke   +4 more
openaire   +2 more sources

Capillary Electrochromatography for Chiral Separations: A Focus on Pharmaceutical, Agrochemical, and Biochemistry Applications and Recently Used Chiral Stationary Phases

Analytica
The separation of chiral compounds is a challenging issue in various fields, e.g., biochemistry, the pharmaceutical industry, food chemistry, forensics, agriculture, etc. Very often, one of the two enantiomers can exhibit different activity.
Maria Chiara Frondaroli, Chiara Fanali, Nina Felli, Salvatore Fanali   +3 more
doaj   +1 more source