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Effects of Soaking pH and Extracting Temperature on the Physicochemical Properties of Chicken Skin Gelatin
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 Title & Authors
Effects of Soaking pH and Extracting Temperature on the Physicochemical Properties of Chicken Skin Gelatin
Kim, Hyun-Wook; Song, Dong-Heon; Choi, Yun-Sang; Kim, Hack-Youn; Hwang, Ko-Eun; Park, Jae-Hyun; Kim, Yong-Jae; Choi, Ji-Hun; Kim, Cheon-Jei;
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This study was conducted to evaluate the effects of soaking pH and extraction temperature on the physicochemical properties of chicken skin gelatin. In order to extract gelatin from chicken skin, the chicken skin was soaked at various pH ranges (1-13) and was extracted at 75 and . For the rate of weight increase, the highest value was obtained from two pH ranges (1-2 and 12-13). In addition, the rate of weight increase was affected by soaking time. The alkali treatments had greater crude protein content as well as total extraction yield compared to the acid process (p<0.05), and the increased extraction temperature resulted in a significant (p<0.05) increase of crude protein content and total extraction yield. All treatments showed and chains derived from type I collagen on SDS-PAGE. The pH value and color of gelatin gel (6.67%) were affected by soaking pH and extraction temperature. Chicken skin gelatin gel extracted at after soaking at a pH of 2 had the highest melting point (p<0.05) and gel strength among all treatments. Although the chicken skin treated with the alkali process had a higher yield, a lower extraction temperature following the acid process would be better for obtaining superior gelatin from chicken skin.
collagen;gelatin;chicken skin;by-products of chicken;
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Physicochemical and Rheological Properties of Composite Shark Catfish (Pangasius pangasius) Skin Collagen Films Integrated with Chitosan and Calcium Salts, Journal of Food Biochemistry, 2016, 40, 3, 304  crossref(new windwow)
Abedin, M. Z. and Riemschneider, R. (1984) Chicken skin collagen-molecular diversity and susceptibility to neutral proteinases. Pharm. Ind. 46, 532-535.

AOAC. (2000) Official methods of analysis of AOAC Int1. 17th ed. Associations of Official Analytical Chemists, USA.

Asghar, A. and Henrickson, R. L. (1982) Chemical, biochemical and nutritional characteristics of collagen in food systems. Adv. Food Res. 28, 231-372. crossref(new window)

Bailey, A. J. and Paul, R. G. (1998) Collagen-is not so simple protein. J. Soc. Leather Technol. Chem. 82, 104-110.

Bannister, D. W. and Burns, A. B. (1972) Pepsin treatment of avian skin collagen. Effects on solubility, subunit composition and aggregation properties. Biochem. J. 129, 677-681.

Bonifer, L. J. and Froning, G. W. (1996) Chicken skin composition as affected by aqueous washings. J. Food Sci. 61, 895-898. crossref(new window)

Cao, H. and Xu, S. Y. (2008) Purification and characterization of type II collagen from chick sterna cartilage. Food Chem. 108, 439-445. crossref(new window)

Cho, S. M., Gu, Y. S., and Kim, S. B. (2005) Extracting optimization and physical properties of yellowfin tuna (Thunnus albacares) skin gelatin compared to mammalian gelatins. Food Hydrocol. 19, 221-229. crossref(new window)

Choi, Y. S., Choi, J. H., Han, D. J., Kim, H. Y., Lee, M. A., Kim, H. W., Jeong, J. Y., and Kim, C. J. (2011) Effects of rice bran fiber on heat-induced gel prepared with pork salt-soluble meat proteins in model system. Meat Sci. 88, 59-66. crossref(new window)

Cliche, S., Amiot, J., Averzard, C., and Gariepy, C. (2003) Extraction and characterization of collagen with or without telopeptides from chicken skins. Poultry Sci. 82, 503-509. crossref(new window)

Divakaran, S. (1984) Handbook of mammalian collagen and gelatin. Biochem. 61, 589-585.

Gomez-Guillen, M. C., Gilmenez, B., Lopez-Caballero, M. E., and Montero, M. P. (2011) Functional and bioactive properties of collagen and gelatin from alternative sources: A review. Food Hydrocol. 25, 1813-1827. crossref(new window)

Gudmundsson, M. (2002) Rheological properties of fish gelatins. J. Food Sci. 67, 2172-2176. crossref(new window)

Jang, E. G., Lim, J., and Kim, K. O. (2002) Effect of soaking condition on the physicochemical properties of chicken feet gelatin. Korean J. Food Sci. Technol. 34, 425-430.

Johnston-Banks, F. A. (1990) Gelatin. In: Food Gels. Harris, P. (ed) Elsevier Applied Food Science Series, London, pp. 223-289.

Kim, C. J., Kim, K. H., and Choe, B. K. (1988) Effect of pH, swelling temperature, swelling time and various acids on the yields and physicochemical properties of pigskin gelatin gel. Korean J. Anim. Sci. 30, 301-306.

Kim, J. W., Kim, D. K., Kim, M. J., and Kim, S. D. (2010) Extraction and bleaching of acid- and pepsin-soluble collagens from shark skin and muscle. Korean J. Food Preserv. 17, 91-99.

Laemmli, U. K. (1970) Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature 227, 680-685. crossref(new window)

Lim, J., O, S., and Kim, K. O. (2001) The effects of processing conditions on the properties of chicken feet gelatin. Food Sci. Biotechnol. 10, 638-645.

Lim, J., Shin, W. S., Lee, H. G., and Kim, K. O. (2002) Optimizing extraction conditions for chicken feet gelatin. Korean J. Food Sci. Technol. 34, 824-829.

Lin, Y. K. and Liu, D. C. (2006) Effects of pepsin digestion at different temperatures and times on properties of telopeptide- poor collagen from bird feet. Food Chem. 94, 621-625. crossref(new window)

Nalinanon, S., Benjakul, S., Visessanguan, W., and Kishimura, H. (2008) Tuna pepsin: characteristics and its use for collagen extraction from the skin of threadfin bream (Nemipterus spp.). J. Food Sci. 73, C413-C419. crossref(new window)

SAS. (2008) SAS/STAT Software for PC. Release 9.2, SAS Institute Inc., Cary, NC, USA.

Shin, M. H. (2002) Properties of collagen extracted from chicken foot skins. Korean J. Culinary Res. 8, 95-105.

Shon, J. and Eun, J. B. (2010) Physicochemical and functional properties of collagen powder from skate (Raja Kenojei) skins. Korean J. Food Preserv. 17, 435-443.

Yeom, G. W., Andrieu, J., and Min, S. G. (2004) Effect of acid treatment process on the physicochemical properties of gelatin extracted from pork skin. Korean J. Food Sci. Ani. Resour. 24, 266-272.