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Pudji Hastuti
Fakultas Teknologi Pertanian, Universitas Gadjah Mada, Yogyakarta, Jl. Sosio Yustisia, Bulaksumur, Yogyakarta 55281
Agriculture, Biological Sciences & Forestry

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Mekanisme dan Kinetika Kuesing Aloe Emodin terhadap Fotooksida Asan Linoleat Yohana S. Kusuma Dewi; Tranggono Tranggono; Sri Raharjo; Pudji Hastuti
agriTECH Vol 26, No 2 (2006)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1533.688 KB) | DOI: 10.22146/agritech.9474

Abstract

To study the effects of methylene blue and aloe emodin on the photosensitized oxidation were prepared in methylene chloride systems. The oxidation of linoleic acid was determined by measuring the peroxide value. The quenching mechanism and kinetics of aloe emodin in methylene blue-sensitized photooxidation of linoleic acid were studied by the steady-state kinetic methods. The methylene blue consentration was produced signicantly increased of peroxide value on singlet oxygen oxydation of linoleic acid The effect of aloe emodin concentration on singlet oxygen oxidation of linoleic acid was produced signicantly decreased of peroxide value of linoleic acid.. The calculated quenching rate of aloe emodin was 4.68 x 109 11I1 S -1. Aloe emodin both of quenched singlet oxygen and sensitizer to reduce photosensitized oxidation of linoleic acid by the singlet oxygen quenching mechanism and the excited triplet oxygen sensitizer quenching mechanism. The ability of antiphotooxidant activity of aloe emodin was affected by concentration.
Co-Authors AA Sudharmawan, AA Sri Raharjo Tranggono Tranggono