Zobrazeno 1 - 6 of 6 pro vyhledávání: '"Negin Nazem"'
2
Isolation, Fractionation, and Identification of Sucrose Esters from Various Oriental Tobaccos Employing Supercritical Fluids
Autor: Negin Nazem, William Monroe Coleman, Mehdi Ashraf-Khorassani, Larry T. Taylor
Publikováno v: Beiträge zur Tabakforschung International, Vol 23, Iss 1, Pp 32-45 (2008)
Isolation, fractionation, and identification of sucrose esters from aged oriental tobacco employing supercritical fluids have been completed. Underivatized sucrose ester-rich extracts were obtained using supercritical CO2 at densities greater than 0.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17e9c2cc04b975af00bfc591c692e6e6
https://doi.org/10.2478/cttr-2013-0846
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3
Identification and Quantification of Sucrose Esters in Various Turkish Tobaccos
Autor: William Monroe Coleman, Larry T. Taylor, N Ashraf-Khorassani, Negin Nazem
Publikováno v: Beiträge zur Tabakforschung International, Vol 21, Iss 8, Pp 441-450 (2005)
Gas chromatography-mass spectrometry (GC-MS) and reversed-phase liquid chromatography-mass spectrometry (LC-MS) were used to compare and quantify sucrose esters (SE) in five different tobaccos. The concentration of SE varied from 340 to 950 µg/g. In
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8472daf1f3039b3409178cc877bbbb0
https://doi.org/10.2478/cttr-2013-0812
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4
Separation and Identification of Sucrose Esters from Turkish Tobacco Using Liquid Chromatography-Mass Spectrometry
Autor: Negin Nazem, Larry T. Taylor, Mehdi Ashraf-Khorassani, William Monroe Coleman
Publikováno v: Beiträge zur Tabakforschung International, Vol 21, Iss 7, Pp 381-389 (2005)
Des esters tetra-acyle de saccharose (SE) dans des extraits de tabac turc ont ete separes et identifies par chromatographie liquide-spectrometrie de masse (LC-MS). Une fraction enrichie de SE obtenue par chromatographie liquide en phase normale semi-
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eae997f0397758eebcd91dc5d8ab0a85
https://doi.org/10.2478/cttr-2013-0804
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5
Isolation of Tetra-acyl Sucrose Esters from Turkish Tobacco Using Supercritical Fluid CO2 and Comparison with Conventional Solvent Extraction
Autor: W. M. Coleman, Larry T. Taylor, Negin Nazem, Mehdi Ashraf-Khorassani
Publikováno v: Journal of Agricultural and Food Chemistry. 53:1866-1872
Pure supercritical CO2 at various pressures and temperatures was used to effect the fractionation of tetra-acyl sucrose esters (SE) from dried, ground Turkish tobacco without any further pretreatment of the matrix. It was determined that SE cannot be
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d78b4d9414b84e488e4114b6d1c61bc
https://doi.org/10.1021/jf040417e
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6
Feasibility of supercritical fluid extraction with on-line coupling of reversed-phase liquid chromatography for quantitative analysis of polymer additives
Autor: Larry T. Taylor, Negin Nazem, Mehdi Ashraf-Khorassani
Publikováno v: Journal of chromatography. A. 995(1-2)
An on-line analytical method for determining polymer additives which incorporates (a) sample preparation and concentration, (b) chromatographic separation, and (c) UV detection is presented. The on-line system which combines supercritical fluid extra
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b043ce2fa22ed550511836bd590eb0c
https://pubmed.ncbi.nlm.nih.gov/12800939
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