کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5157333 | 1500592 | 2017 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultrasound-assisted extraction and structural characterization by NMR of alginates and carrageenans from seaweeds
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Polysaccharides from seaweeds are interesting materials for food and pharmaceutical applications such as drug delivery due to their biocompatibility and biodegradability. Extraction of these biopolymers is usually performed during several hours to obtain a significant extraction yield. In this paper, we report on a new process to extract alginates from brown seaweeds (Sargassum binderi and Turbinaria ornata) and carrageenans from red seaweeds (Kappaphycus alvarezii and Euchema denticulatum) with the assistance of ultrasound. The effect of several parameters (pH, temperature, algae/water ratio, ultrasound power and duration) was investigated to determine optimal extraction conditions. The extracted polysaccharides represented up to 55% of the seaweeds dry weight and were obtained in a short time (15-30Â min) as compared to 27% in 2Â h for conventional extraction. NMR, FTIR and SEC analysis were used to characterise the extracted polymers. Ultrasound allowed the reduction of extraction time without affecting the chemical structure and molar mass distribution of alginates and carrageenans.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 166, 15 June 2017, Pages 55-63
Journal: Carbohydrate Polymers - Volume 166, 15 June 2017, Pages 55-63
نویسندگان
Latufa Youssouf, Laura Lallemand, Pierre Giraud, Faiza Soulé, Archana Bhaw-Luximon, Olivier Meilhac, Christian Lefèbvre D'Hellencourt, Dhanjay Jhurry, Joël Couprie,