About: Differentiation of coffee varieties according to their sterolic profile

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The aim of the presented work was to differentiate between two important coffee varieties - arabica and robusta by means of chemical analyses of sterolic fraction of 13 model and 14 commercial roasted coffee samples. After the extraction of the coffee oil, the lipids have been saponified and sterols converted into trimethyl silyl derivatives and analysed by gas chromatography with MS detection. For the evaluation of authenticity of coffee samples several statistical approaches multilinear regression, principal component analyses a cluster analyses) were used. Δ5-avenasterol was found to be the chemical descriptor with the highest contribution to the model and the following correlation equation was achieved: percentage of arabica in coffee = 117 - 11.1 x percentage of Δ5-avenasterol in total sterols, with a high correlation coefficient (R2= 0.98) and accuracy (RSD= 7.9 %). The method was applied to the determination of the arabica/robusta composition of commercial roasted coffee samples. The aim of the presented work was to differentiate between two important coffee varieties - arabica and robusta by means of chemical analyses of sterolic fraction of 13 model and 14 commercial roasted coffee samples. After the extraction of the coffee oil, the lipids have been saponified and sterols converted into trimethyl silyl derivatives and analysed by gas chromatography with MS detection. For the evaluation of authenticity of coffee samples several statistical approaches multilinear regression, principal component analyses a cluster analyses) were used. Δ5-avenasterol was found to be the chemical descriptor with the highest contribution to the model and the following correlation equation was achieved: percentage of arabica in coffee = 117 - 11.1 x percentage of Δ5-avenasterol in total sterols, with a high correlation coefficient (R2= 0.98) and accuracy (RSD= 7.9 %). The method was applied to the determination of the arabica/robusta composition of commercial roasted coffee samples. (en) Cílem práce byl vývoj metody umožňující rozlišení Arabiky a Robusty na základě stanovení sterolové frakce. (cs)
Title	Differentiation of coffee varieties according to their sterolic profile Differentiation of coffee varieties according to their sterolic profile (en) Rozlišení kávy na základě stanovení profilu sterolů (cs)
skos:prefLabel	Differentiation of coffee varieties according to their sterolic profile Differentiation of coffee varieties according to their sterolic profile (en) Rozlišení kávy na základě stanovení profilu sterolů (cs)
skos:notation	RIV/60461373:22330/07:00019070!RIV08-MSM-22330___
http://linked.open.../vavai/riv/strany	28-34
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM6046137305)
http://linked.open...iv/cisloPeriodika	46
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Voldřich, Michal Ševčík, Rudolf Čížková, Helena Soukupová, Veronika
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta potravinářské a biochemické technologie
http://linked.open...dnocenehoVysledku	417298
http://linked.open...ai/riv/idVysledku	RIV/60461373:22330/07:00019070
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	coffee; arabica; robusta; authenticity; sterols, gas chromatography, multilinear regression, principal component analysis, cluster analysis (en)
http://linked.open.../riv/klicoveSlovo	authenticity sterols cluster analysis coffee gas chromatography principal component analysis arabica robusta multilinear regression
http://linked.open...odStatuVydavatele	SK - Slovenská republika
http://linked.open...ontrolniKodProRIV	[E6825C047429]
http://linked.open...i/riv/nazevZdroje	Journal of Food and Nutrition research
http://linked.open...in/vavai/riv/obor	GM
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...UplatneniVysledku	2007
http://linked.open...iv/tvurceVysledku	Voldřich, Michal Ševčík, Rudolf Čížková, Helena Soukupová, Veronika
http://linked.open...n/vavai/riv/zamer	Teoretické základy potravinářských a biochemických technologií
issn	1336-8672
number of pages	7 (xsd:int)
http://localhost/t...ganizacniJednotka	22330

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