Книга: Emad Yousif,Shahbaz Maki and Sura Attwan «Photochemistry»
Производитель: "LAP Lambert Academic Publishing" 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. ISBN:9783659513008 Издательство: "LAP Lambert Academic Publishing" (2014)
ISBN: 9783659513008 |
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См. также в других словарях:
Photochemistry — Photochemistry, a sub discipline of chemistry, is the study of chemical reactions that proceed with the absorption of light by atoms or molecules.[1]. Everyday examples include photosynthesis, the degradation of plastics and the formation of… … Wikipedia
Photochemistry — Pho to*chem is*try, n. [Photo + chemistry.] (Chem.) The branch of chemistry which relates to the effect of light in producing chemical changes, as in photography. [1913 Webster] … The Collaborative International Dictionary of English
photochemistry — ► NOUN ▪ the branch of chemistry concerned with the chemical effects of light. DERIVATIVES photochemical adjective … English terms dictionary
photochemistry — [fōt΄ō kem′is trē] n. [ PHOTO + CHEMISTRY] the branch of chemistry having to do with the effect of light or other radiant energy in producing chemical action, as in photosynthesis or photography photochemical [fōt΄ō kem′i kəl] adj … English World dictionary
photochemistry — noun Date: 1867 1. a branch of chemistry that deals with the effect of radiant energy in producing chemical changes 2. a. photochemical properties < the photochemistry of gases > b. photochemical processes < photochemistry of vision > •… … New Collegiate Dictionary
photochemistry — The branch of chemistry concerned with the chemical changes caused by or involving light. * * * pho·to·chem·is·try kem ə strē n, pl tries 1) a branch of chemistry that deals with the effect of radiant energy in producing chemical changes 2 a)… … Medical dictionary