کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1375815 1500654 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of γ-rays on carboxymethyl chitosan for use as antioxidant and preservative coating for peach fruit
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Effect of γ-rays on carboxymethyl chitosan for use as antioxidant and preservative coating for peach fruit
چکیده انگلیسی


• Carboxymethyl chitosan (CMCS) was synthesized.
• CMCS with different Mws were prepared upon effect of γ-rays.
• We evaluated the antioxidant activity of irradiated CMCS using different methods.
• Irradiated CMCS had a good effect on delaying spoilage of peach fruits.
• Irradiated CMCS can be used as antioxidant and preservative coating.

Carboxymethyl chitosan (CMCS) was synthesized by alkylation of chitosan using monochloroacetic acid and characterized by FTIR and 1H-NMR spectroscopies. Different molecular weights (Mws) of CMCS were prepared by radiation degradation of CMCS in the solution form at different irradiation doses. The structural changes and Mw of degraded CMCS were confirmed by UV–Vis, FTIR and GPC. The antioxidant activity of CMCS was evaluated using scavenging effect on DPPH radicals, reducing power and ferrous ion chelating activity assays. The antioxidant activity of CMCS enhanced with decreasing CMCS Mw. The possible practical use of CMCS as preservative coating for peach fruit by dipping treatment after 10 days of storage at ambient temperature was investigated. The CMCS with lower Mw had a good effect on delaying spoilage and decreasing malondialdehyde (MDA) content of peach fruits suggesting their possible use as antioxidant and preservative coating.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 104, 15 April 2014, Pages 109–117
نویسندگان
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