Photobleaching of anthocyanins using tunable dye laser

Ahmed,Wafa Omer; Supervisor, - Ahmed  Hassan S. Elkheir

dc.contributor.author	Ahmed,Wafa Omer
dc.contributor.author	Supervisor, - Ahmed Hassan S. Elkheir
dc.date.accessioned	Ahmed,Wafa Omer
dc.date.available	2013-11-19T09:28:32Z
dc.date.issued	2008-08-01
dc.identifier.citation	Ahmed , Wafa Omer . Photobleaching of anthocyanins using tunable dye laser / Wafa Omer Ahmed ; Ahmed Hassan S. Elkheir .- Khartoum : sudan university of science and technology , Institute Of Laser , 2008 .- 67 P. :ill ; 28cm .- M.Sc..	en_US
dc.identifier.uri	http://repository.sustech.edu/handle/123456789/2382
dc.description	Thesis	en_US
dc.description.abstract	The flowers of Hibiscus sabdarifa were extracted with acidified methanol. The Anthocyanin of Hibiscus sabdarifa was obtained as red needles from absolute ethanol. A dye laser operating at 520 nm was used to bleach the red- colored anthocyanin. A mixture of the anthocyanin and triethylamine was irradiated with laser for 40 minutes. Under such conditions the iv ‫‪The anthocyanin then oxidizes triethylamine and reduces to a colourless‬‬ ‫.‪radical‬‬ ‫‪AS‬‬ ‫1‬ ‫‪AS‬‬ ‫3‬ ‫‪hν‬‬ ‫0‪AS‬‬ ‫1‬ ‫)‪(Red‬‬ ‫3‪AS• + •NR‬‬ ‫3‬ ‫3‪AS +:NR‬‬ ‫)‪(Colourless‬‬ ‫‬	en_US
dc.description.sponsorship	Sudan University of Science and technology	en_US
dc.language.iso	en	en_US
dc.publisher	sudan university of scince and technology	en_US
dc.subject	Hibiscus	en_US
dc.subject	methanol	en_US
dc.subject	ethanol	en_US
dc.subject	dye laser	en_US
dc.subject	anthocyanin	en_US
dc.title	Photobleaching of anthocyanins using tunable dye laser	en_US
dc.type	Thesis	en_US