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Hide unhairing and characterization of commercial enzymes used in leather manufacture

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Hide unhairing and characterization of commercial enzymes used in leather manufacture

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Título Hide unhairing and characterization of commercial enzymes used in leather manufacture
Autor Dettmer, Aline
Ayub, Marco Antônio Záchia
Gutterres, Mariliz
Abstract The enzymatic treatment of hides in tannery processes is a promising technology. However, the reaction kinetics of commercial enzymes available to the leather industry are not fully understood and their activities have been mainly determined with model proteins such as casein as substrate, which are not of direct relevance for cattle hides. Therefore, it is important to determine their activities on collagen and keratin, the main proteins of skin, in order to use these enzymes in leather processing. This work describes the study of five proteases, used commercially in tanneries, to assess their ability to act upon collagen and keratin and to determine their unhairing. Results showed that all commercial enzymes tested had more activity on collagen than on keratin. Unhairing was also tested and four out of the five enzymes tested showed some unhairing activity. Optima of the temperature and pH of the enzymes were very similar for all five enzymes, with maximal activities around 55°C and pH 9 to 12, respectively.
Contido em Brazilian journal of chemical engineering [recurso eletrônico]. São Paulo, SP. Vol. 28, no. 3 (July/Sept. 2011), p. 373-380
Assunto Biotecnologia
Couro : Tecnologia
Enzima
Enzimas
Indústria do couro
[en] Commercial enzymes
[en] Enzyme characterization
[en] Leather tanning
[en] Unhairing
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/75892
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