کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4515969 1322336 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Antioxidant activity of small grain cereals caused by phenolics and lipid soluble antioxidants
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
Antioxidant activity of small grain cereals caused by phenolics and lipid soluble antioxidants
چکیده انگلیسی

In this study, the content of soluble, free forms of phenolic compounds (total phenolics, flavonoids, PVPP (polyvinylpolypyrrolidone) bound phenolics, proanthocyanidins and phenolic acids), as well as the content of carotenoids and tocopherols, were determined in whole grains of bread and durum wheat, rye, hull-less barley and hull-less oat, each represented with four genotypes. Antioxidant activity was evaluated as radical scavenging activity with DPPH (2,2-diphenyl-1-picrylhydrazyl) reagent, as well as by hydrogen transfer reaction (reduction power) based on the reduction of Fe3+. Generally, a considerable variation in antioxidant activities and phytochemical contents was observed between the cereals. Remarkably higher DPPH radical scavenging ability and reducing power were detected in hull-less barley, followed by rye and hull-less oat and durum and bread wheat, indicating that small grain species have different major antioxidants with different properties. Hull-less barley had the highest content of total free phenols, flavonoids, PVPP bound phenolics and contained flavan-3-ols, not found in other species. Hull-less oat had the highest content of tocopherols, very high content of yellow pigments and PVPP bound phenolics. Ferulic acid was the major free phenolic acid in small grain cereals tested. The relationship between the content of soluble phenols, as well as reducing power and DPPH
• scavenging activity are also considered.


► Antioxidant capacity of small grain cereals was remarkably different.
► The levels of health beneficial phytochemicals among the species were differented.
► Phenolic profiles and carotenoids influence the antioxidant properties of grain.
► The highest DPPH radical scavenging ability was detected in hull-less barley.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cereal Science - Volume 54, Issue 3, November 2011, Pages 417–424
نویسندگان
, , , , , ,