Photochemistry: Photolysis of Riboflavin in Buffer solution at Different pH - Couverture souple

Yousif, Emad; Maki, Shahbaz; Attwan, Sura

 
9783659513008: Photochemistry: Photolysis of Riboflavin in Buffer solution at Different pH
Couverture souple
ISBN 10 : 3659513008 ISBN 13 : 9783659513008
Editeur : LAP LAMBERT Academic Publishing, 2014

Synopsis

This work was made to study the photochemistry of riboflavin and the kinetics of riboflavin degradation after exposure to UV-Vis light phosphate buffer solution at different pH interval (2-10) with the same concentration (5×10-5M ) was studied by the of UV-Vis spectrophotoscopy analyses, it showed that degradation increase as pH increase from pH (2-7)where the lumichrome a photoderivative forms in the acidic medium. a maximum degradation occurs at neutral pH (7). Then it began to decrease from pH (7-10). Where the lumiflavine (a photoderivative occurs at basic media) formed. We also calculated the quantum yield of this decomposition and found that an increasing occur from pH (2-7) (1.902×10-4-6.020×10-4) then a decrease occur from pH (7-10) (6.020×10-4- 1.266×10-4) as well as the reactivity ratio.

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Présentation de l'éditeur

This work was made to study the photochemistry of riboflavin and the kinetics of riboflavin degradation after exposure to UV-Vis light phosphate buffer solution at different pH interval (2-10) with the same concentration (5×10-5M ) was studied by the of UV-Vis spectrophotoscopy analyses, it showed that degradation increase as pH increase from pH (2-7)where the lumichrome a photoderivative forms in the acidic medium. a maximum degradation occurs at neutral pH (7). Then it began to decrease from pH (7-10). Where the lumiflavine (a photoderivative occurs at basic media) formed. We also calculated the quantum yield of this decomposition and found that an increasing occur from pH (2-7) (1.902×10-4-6.020×10-4) then a decrease occur from pH (7-10) (6.020×10-4- 1.266×10-4) as well as the reactivity ratio.

Biographie de l'auteur

Emad Yousif, Department of Chemistry, College of Science, Al-Nahrain University

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2014
Langue
anglais
ISBN 10 
3659513008
ISBN 13 
9783659513008
Reliure
Broché
Nombre de pages
88
Coordonnées du fabricant
non disponible
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