کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6893893 | 1445572 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Acetylation, crystalline and morphological properties of structural polysaccharide from shrimp exoskeleton
ترجمه فارسی عنوان
استیلایزینگ، خواص کریستالی و مورفولوژیکی پلی ساکارید ساختاری از بیسکویت میگو
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
علوم کامپیوتر (عمومی)
چکیده انگلیسی
The extraction of a structural polysaccharide, α-chitin, from shrimp exoskeleton via chemical means using hydrochloric acid (HCl) and sodium hydroxide (NaOH) has been done. Concentrations of 0.4, 0.8 and 1.2 M for both HCl and NaOH were chosen to evaluate the acetylation degree (DA), crystalline structure and morphology of the chitin. The N-acetyl groups' content in the structural polysaccharide ranged between 65.6 and 99.4% in decreasing order of both acid and alkali concentrations combination used. The magnitude of chitin average hydrogen bond energy EH was majorly influenced by OH(6)â¦OC intra and COâ¦HN intermolecular hydrogen bonds as they showed more predominance than OH(3)â¦O(5) and OHâ¦OC intra and intermolecular hydrogen bonds. Chitin diffraction planes, crystalline index (Crl) and crystallite size (Dhkl) were investigated by X-ray diffraction (XRD) with reflections observed on (0 2 1), (1 1 0), (1 3 0) and (0 1 3) planes. The Crl occurred between 79.4 and 87.4%, while crystallite sizes were between 0.544 and 3.64 Ã
for the samples. Morphological study using scanning electron microscopy with energy dispersive spectroscopy SEM/EDS showed strong calcium and oxygen peaks. This established the shrimp shell surface to be composed of calcite and trace elements such as nitrogen and silicon. The observed α-chitin rough surfaces were attributed to the low degree deacetylation recorded during alkali treatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Science and Technology, an International Journal - Volume 20, Issue 3, June 2017, Pages 1155-1165
Journal: Engineering Science and Technology, an International Journal - Volume 20, Issue 3, June 2017, Pages 1155-1165
نویسندگان
O.P. Gbenebor, S.O. Adeosun, G.I. Lawal, S. Jun, S.A. Olaleye,