کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1386954 | 982541 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural factors affecting radical scavenging activity of chitooligosaccharides (COS) and its derivatives
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Two chitooligosaccharides (COS) derivatives were synthesised by introducing carboxyl (–COCH2CH2COO−) and quaternized amino (–CH2CH(OH)CH2N(CH3)3+) groups to the amino position of COS with different substitution degrees (CCOS-1–3 and QCOS-1–3) for the purpose of altering total amount of hydrogen atoms capable of reacting with radicals and modifying their metal ion chelating ability. Scavenging of carbon-centered and DPPH radicals was directly affected by the amount of abstractable hydrogen atoms in COS molecules. In contrast, structure-activity relationships revealed that chelation of Fe2+ ions indirectly contributed for their observed hydroxyl radical scavenging activity apart from hydrogen abstraction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 63, Issue 1, 18 January 2006, Pages 122–129
Journal: Carbohydrate Polymers - Volume 63, Issue 1, 18 January 2006, Pages 122–129
نویسندگان
Ronghua Huang, Niranjan Rajapakse, Se-Kwon Kim,