کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7791626 | 1500647 | 2014 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of physicochemical properties of carboxymethyl agar
ترجمه فارسی عنوان
خصوصیات خواص فیزیکوشیمیایی کربوکسی متیل آگار
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کلمات کلیدی
آگار کربوکسی متیل شدن، درجه حرارت زدایی، پایداری حرارتی، چرخش نوری،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
A series of carboxymethyl agars (CMAs) with different degree of substitution (DS) were prepared, and their properties were determined and analyzed. The results showed that with the increase of DS, the dissolving temperature, the gelling temperature, the gel melting temperature, the gel strength, the gel hardness, the gel fracturability, and the solution apparent viscosity of CMA all decreased, except that its gel cohesiveness and gel springiness increased. The variation process of agar molecules in solution from coil to helix could be observed by measuring the optical rotation of the solution at such a low concentration, at which even the solution could not form a gel. The gel skeleton microstructures of both agar and CMA were of porous network structure, and the pore size of CMA became smaller and denser with the increase of its DS. After carboxymethylation, the agar hygroscopicity was improved, but its thermal stability was lowered.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 111, 13 October 2014, Pages 449-455
Journal: Carbohydrate Polymers - Volume 111, 13 October 2014, Pages 449-455
نویسندگان
Mingzhao Cao, Xin Liu, Jimei Luan, Xiaodong Zhang,