Antioxidant activity of lycopene extracted from tomato paste towards trichloromethyl peroxyl radical CCl3O2·
| Autor: | Wang Dapu, Zhao Ya-ping, Xue Zheng, Qian Suping, Shen Hong, Yu Wenli, Yao Side |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Antioxidant medicine.medical_treatment General Medicine Lycopene Analytical Chemistry Pigment chemistry.chemical_compound Reaction rate constant chemistry visual_art Radiolysis visual_art.visual_art_medium Acetone medicine Organic chemistry Carotenoid Food Science Nuclear chemistry |
| Zdroj: | Food Chemistry. 77:209-212 |
| ISSN: | 0308-8146 |
| DOI: | 10.1016/s0308-8146(01)00339-9 |
| Popis: | The objectives of this paper were to evaluate the antioxidant activity of lycopene towards the trichloromethyl peroxyl radical (CCl3O2.) and to obtain a precise rate constant using a pulse radiolysis technique. Lycopene was extracted and purified from tomato paste and its purity reached 95.0% (HPLC analysis). CCl3O2. was generated from a pulsed aqueous air-saturated solution of 2-propanol (2 M), acetone (1 M) and CCl4 (10(-2) M). The observed spectrum showed an intense bleaching of the lycopene ground-state absorption in the region 350-450 nm and the bleaching rate constant was determined to be 1.17 x 10(9) M(-1)s(-1), which indicated a rapid interaction between lycopene and CCl3O2.. (C) 2002 Elsevier Science Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect