کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1378831 | 982010 | 2009 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Extraction and characterization of chitin and chitosan from marine sources in Arabian Gulf Extraction and characterization of chitin and chitosan from marine sources in Arabian Gulf](/preview/png/1378831.png)
Chitin in the α and the β forms has been extracted from different marine crustacean from the Arabian Gulf. The contents of the various exoskeletons have been analyzed and the percent of the inorganic salt (including the various elements present), protein and the chitin was determined. Deacetylation of the different chitin produced was conducted by the conventional thermal heating and by microwave heating methods. Microwave heating has reduced enormously the time of heating from 6–10 h to 10–15 min, to yield the same degree of deacetylation and higher molecular weight chitosan. This technique can save massive amount of energy when implemented on a semi-industrial or industrial scale. The chitin and the obtained chitosan were characterized by elemental analysis, XRD, NMR, FTIR and thermogravimetric measurements. XRD analysis showed that chitosan has lower crystallinity than its corresponding chitin; meanwhile its thermal stability is also lower than chitin.
Journal: Carbohydrate Polymers - Volume 77, Issue 2, 10 June 2009, Pages 410–419