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Title: | Extraction of collagen and gelatine from meat industry by-products for food and non food uses | ||||||||||
Author: | Mokrejš, Pavel; Langmaier, Ferdinand; Mládek, Milan; Janáčová, Dagmar; Kolomazník, Karel; Vašek, Vladimír | ||||||||||
Document type: | Peer-reviewed article (English) | ||||||||||
Source document: | Waste Management and Research. 2009, vol. 27, issue 1, p. 31-37 | ||||||||||
ISSN: | 0734-242X (Sherpa/RoMEO, JCR) | ||||||||||
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DOI: | https://doi.org/10.1177/0734242X07081483 | ||||||||||
Abstract: | Short tendons of slaughtered cattle, consisting of relatively pure collagen, were disposed of lipoid substances and non-collagen proteins by means of commercial enzymatic preparation. Diluted acetic acid was used to separate an acid-soluble collagen (MN?300 kDa) of a yield around 5 %. The residue was extracted with water and extraction conditions were specified to give gelatine of gel rigidity 350-410 oBloom with a yield of 55-60 %. Prolonged extraction time, as well as increased extraction temperature, lead to deteriorated gelatine quality and, therefore, residue after aqueous extraction was processed through enzymatic hydrolysis into a collagen hydrolysate of MN=500?1000 Da. Such hydrolysates can be industrially employed as humectants in cosmetic skin-care preparations or as a secondary industrial raw material for producing surfactants of acylamino-carboxy acid type known for their favourable dermatological effects. The proposed procedure, apart from max 7 % of lipoid substances, produces no further waste so it may be regarded as a ?clean technology?. | ||||||||||
Full text: | http://wmr.sagepub.com/content/27/1/31 | ||||||||||
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