کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6397397 1330675 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chemical and biophysical properties of gelatins extracted from alkali-pretreated skin of cuttlefish (Sepia officinalis) using pepsin
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
پیش نمایش صفحه اول مقاله
Chemical and biophysical properties of gelatins extracted from alkali-pretreated skin of cuttlefish (Sepia officinalis) using pepsin
چکیده انگلیسی


- Enzymatic treatment of skin of cuttlefish increased the yield of gelatin extraction.
- Molecular weight of gelatin from cuttlefish was affected by enzymatic extraction.
- Functional properties of extracted gelatin were affected by enzymatic extraction.
- Non-pepsic gelatin showed the highest gel strength, gelling and melting point.

Gelatins from alkali-pretreated skin of cuttlefish (Sepia officinalis) were extracted with different concentrations of pepsin at pH 2.0 and characterized. The increase of enzyme concentration increased the yield of gelatin extraction. The yields of gelatins G5, G10 and G15, extracted, respectively, with 5, 10, and 15 U of pepsin/g of alkali-treated skin of cuttlefish, were 6.59%, 7.69% and 9.22%, respectively, while in the absence of pepsin (G0) the yield was only 2.68%. Nevertheless, the extraction of gelatin from alkali-pretreated skin of cuttlefish with pepsin at pH 2.0 affected the molecular weight, biophysical and functional properties of resulting gelatins. Gelatin extracted without pepsin showed the higher gel strength, and transition, gelling and melting temperatures, which are slightly higher than G5. All of these values decreased with increasing enzyme concentration. In addition, foam expansion (FE) was affected by enzymatic treatment, and the values decreased as pepsin increased. Nevertheless, the partially hydrolyzed gelatins showed the same emulsifying properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Research International - Volume 54, Issue 2, December 2013, Pages 1680-1687
نویسندگان
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