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http://dx.doi.org/10.5851/kosfa.2017.37.5.708

Physicochemical Properties of Gelatin Extracted from Buffalo Hide Pretreated with Different Acids  

Mulyani, Sri (Department of Food and Agricultural Product Technology, Gadjah Mada University)
Setyabudi, Francis.M.C. Sigit (Department of Food and Agricultural Product Technology, Gadjah Mada University)
Pranoto, Yudi (Department of Food and Agricultural Product Technology, Gadjah Mada University)
Santoso, Umar (Department of Food and Agricultural Product Technology, Gadjah Mada University)
Publication Information
Food Science of Animal Resources / v.37, no.5, 2017 , pp. 708-715 More about this Journal
Abstract
The acid pretreatment of collagen molecules disrupts their crosslinks and assists in the release of acid-soluble proteins, fats, and other components. Generally, to achieve optimum extraction efficiency, strong acids may be used at a lower acid concentration compared to weak acids. This study aimed to determine the yield and physicochemical properties of gelatins extracted from buffalo hides pretreated with different acids. Hides were extracted with hydrochloric, citric, and acetic acids at concentrations of 0.3, 0.6, 0.9, 1.2, and 1.5 M. A completely randomized design and the least significant difference test were used in the experimental design, and all measurements were performed in triplicate. The highest yield (29.17%) was obtained from pretreatment with 0.9 M HCl. The gel strength did not differ significantly (p>0.05) according to acid type (280.26-259.62 g Bloom), and the highest viscosity was obtained from the 0.6 M citric acid pretreatment. All the gelatins contained ${\alpha}$- and ${\beta}$-chain components and several degraded peptides (24-66 kDa). The color and Fourier-transform infrared spectrum of the gelatin extracted using 0.9 M HCl were similar to those of commercial bovine skin gelatin. In general, the physicochemical properties of the gelatin complied with the industry standard set by the Gelatin Manufacturers Institute of America, revealing that buffalo hide could serve as a potential alternative source of gelatin.
Keywords
acid pretreatment; buffalo hide; gelatin; physicochemical properties; yield;
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