期刊
WASTE MANAGEMENT & RESEARCH
卷 27, 期 1, 页码 31-37出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0734242X07081483
关键词
Meat by-products; soluble collagen; gelatine; collagen hydrolysate; extraction; wmr 1214-3
资金
- Ministry of Education of the Czech Republic [Ndegree 7088352102]
Short tendons of slaughtered cattle, which consist of relatively pure collagen, were cleaned of lipoid substances and non-collagen proteins using a commercial enzymatic preparation. Diluted acetic acid was used to separate the acid-soluble collagen (M(N) approximate to 300 kDa) for a yield of around 5%. The residue was extracted with water and the extraction conditions were derived to produce gelatine with a gel rigidity of 350-410 degrees Bloom and a yield of 55-60%. Prolonged extraction time, as well as increased extraction temperature, led to a deterioration in the gelatine quality and, therefore, the residue after aqueous extraction was processed by enzymatic hydrolysis into a collagen hydrolysate of M(N) = 500-1000 Da. Such hydrolysates can be utilized in industry as humectants in cosmetic skin-care preparations or as a secondary industrial raw material for producing surfactants of acylamino-carboxy acid type, which are known for their favourable dermatological effects. Apart from a maximum of 7% lipoid substances the proposed procedure produced no further waste so it may be regarded as a 'clean technology'.
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