کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4365137 1616345 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Potential use of wool-associated Bacillus species for biodegradation of keratinous materials
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
پیش نمایش صفحه اول مقاله
Potential use of wool-associated Bacillus species for biodegradation of keratinous materials
چکیده انگلیسی

Five wool-degrading bacterial strains were selected from a set of 115 isolates from a less conventional source, i.e., the wool of Portuguese Merino sheep, based on their promising keratinolytic abilities. All selected strains belong to the genus Bacillus, probably Bacillus subtilis/licheniformis, according to 16S rRNA sequencing. They were able to grow on and hydrolyse feathers and wool (in both native and milled forms), and human hair and nails to a lesser extent. The maximum keratinase activity was recorded on milled chicken feathers. Biodegradation of such keratin-rich matrices increased the amount of soluble proteins in the fermentation broth and implied the action of extracellular enzymes from those adventitious microorganisms. Therefore, such novel strains have a potential for effective use in solid waste management strategies encompassing keratin-rich materials based on submerged fermentation. Concomitantly, the nutritional value of the broth may be improved for eventual formulation of animal feed.


► Five wool-degrading bacterial strains selected with notable keratinolytic activity.
► All strains able to grow and hydrolyse feathers and wool, both native and milled.
► Proteolytic stability observed over wide range of pH and temperature.
► Strains with potential for upgrading keratin-rich solid wastes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Biodeterioration & Biodegradation - Volume 70, May 2012, Pages 60–65
نویسندگان
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