کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8333240 | 1540253 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Complexation of sodium caseinate with gum tragacanth: Effect of various species and rheology of coacervates
ترجمه فارسی عنوان
مجتمع سدیم کائازینت با تراگاکانت آدامس: اثر گونه های مختلف و رئولاسیون کاکارات ها
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
چکیده انگلیسی
We investigated complex coacervation of sodium caseinate/Astragalus rahensis (A.r) as a function of pH with light scattering, spectrophotometry, and viscosity measurements. Interestingly, sodium caseinate/A.r displayed five structural transitions; pH 7.00 to pH â¼5.40: no interaction occurred, pH â¼5.40 to pH â¼4.80: initiation of the formation of primary soluble complexes, pH â¼4.80 to â¼4.30: formation of interpolymer complexes, pH â¼4.30 to â¼4.02: optimum coacervation and pH â¼4.02 to â¼2.50: suppression of coacervation. In addition, rheological properties of sodium caseinate/A.r coacervates were studied at various pH values. A much higher storage modulus (Gâ²) than loss modulus (Gâ³) for all sodium caseinate/A.r coacervates suggests the formation of highly interconnected gel-like network structures with mainly elastic behaviour. Moreover, sodium caseinate/A.r coacervates at all pH values exhibited a shear thinning behaviour across the entire shear rate range investigated. Effects of different species of gum tragacanth on the interactions with sodium caseinate have been scarcely studied. Our study showed that systems containing various species (A.r, soluble fraction of A.r and Astragalus gossypinus (A.g)) had different critical pH values and particle sizes during complex coacervation, which could be due to different ratio of soluble to insoluble fractions and uronic acid content of various species.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 67, June 2014, Pages 503-511
Journal: International Journal of Biological Macromolecules - Volume 67, June 2014, Pages 503-511
نویسندگان
Sara Ghorbani Gorji, Elham Ghorbani Gorji, Mohammad Amin Mohammadifar, Azizollaah Zargaraan,