DPPH Radical-Scavenging Activity and Polyphenol Content in Dried Fruits
نویسندگان
چکیده
منابع مشابه
Synthesis and DPPH radical scavenging activity of prenylated phenol derivatives.
The synthesis of twenty six prenylated phenols derivatives is reported. These compounds were obtained under mild conditions via Electrophilic Aromatic Substitution (EAS) coupling reactions between phenol derivatives containing electron-donor subtituents and 3-methyl-2-buten-1-ol using BF(3)×OEt(2). Dialkylations were also produced with this method. The formation of a chroman ring by intramolecu...
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We used DPPH scavenging assays to study the antioxidant activity of three native Polish species of blackberry leaves (Rubus kuleszae Ziel., R. fabrimontanus (Sprib.) Sprib. and R. capitulatus Utsch.). All the studied extracts (methanolic, water, methanolic-water) showed high DPPH free radical scavenging activity (IC50 450.0–186.0 μg/ml). The most effective of the studied species was Rubus kules...
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Sixteen hydroxychalcones were synthesized in sufficient purity by the Claisen–Schmidt condensation between appropriate acetophenones and aromatic aldehydes. All the compounds were evaluated for their ability to scavenge the stable free 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical. Important structure–activity relationships were observed that strongly contribute to the knowledge for the design o...
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The essential oil of Pimenta dioica was isolated by hydro distillation and steam distillation. The aqueous extract was also taken. The antioxidant, total phenolic and the antimicrobial studies were conducted. The antimicrobial activity was significant. The IC50 value of extract and essential oil are 390 μg/ml and 2340 μg/ml respectively.
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The DPPH radical scavenging activity of 2',4',6'-trihydroxy- and 2'-hydroxy-4',6'-dimethoxychalcones carrying a 2,3- and 3,4-dihydroxylated, and 3,4,5-trihydroxylated B-ring was evaluated in alcoholic and non-alcoholic solvents. All test compounds scavenged more than two equivalent of radicals by a possible conversion to the corresponding B-ring quinones and in most cases subsequently underwent...
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ژورنال
عنوان ژورنال: Food Science and Technology Research
سال: 2004
ISSN: 1344-6606,1881-3984
DOI: 10.3136/fstr.10.152