کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1187491 963467 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Antioxidant capacity of caseinophosphopeptides prepared from sodium caseinate using Alcalase
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Antioxidant capacity of caseinophosphopeptides prepared from sodium caseinate using Alcalase
چکیده انگلیسی

The antioxidant capacity of caseinophosphopeptide prepared at different pH from casein hydrolysate with Alcalase was evaluated using oxygen radical absorbance capacity (ORAC), reduction capacity and metal chelating activity. The yield of CPP production was dependent on the pH of supernatant from pH 4.6 clarified Alcalase hydrolysate of sodium caseinate. CPP of pH 3 had higher content of cysteine, aspartic acid, glycine, histidine, proline, tyrosine, and leucine, and less content of glutamic acid, serine, and isoleucine than those of other pH. The phosphate contents of all CPP were relatively similar, 5.0–5.4% (w/w) except at pH 3. The ORAC against peroxyl radical (ORACROOORACROO) of CPP decreased with increasing pH (3–8) in concentrations tested and was positively correlated with its reduction capacity. The ORAC against hydroxyl radical (ORACOHORACOH) of CPP at 50 μg/ml increased with increasing pH to 7 and then decreased, and its metal chelating activity on ferrous ion increased linearly with increasing pH from 3 to 5, then slowly increased until pH 8, indicating that the ORACOHORACOH activity of CPP might be attributed to the scavenging activity on hydroxyl radical itself as well as the chelating activity of transition metals.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 104, Issue 4, 2007, Pages 1359–1365
نویسندگان
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