Strain T1E, isolated and identified as Brevibacillus thermoruber, and evolutionally distant from the known keratinolytic isolates, proved to have feather-degrading ability. During the 7-day fermentation period, T1E consumed 10 g/l native goose feathers as the sole source of carbon and energy at 50 degrees C under aerobic conditions. The isolate secreted a thermostable, keratinolytic protease, w...

Most of the hard-to-degrade keratin containing substrates like feathers or animal hairs is either discarded or incinerated, resulting in energy consumption and environmental pollution. Thus, an innovative eco-friendly method to deal with these wastes is urgently needed. Microbial degradation of keratin by keratinases has gained biotechnological interest in applications and represents a great op...

Due to the high levels of pollution load produced in leather industry, many studies are being conducted replace most hazardous chemicals used. One options is use enzymes which biodegradable and considered environmentally friendly. Hides skins contain non-collagenous substances that require specific remove. The aim study was evaluate effectiveness different enzyme formulations unhairing process ...

Four extracellular keratinases (designated KI, KII, KIII, and KIV) were produced during submerged aerobic cultivation in a medium containing native human foot skin (NHFS) for enzyme synthesis. The molecular weights, determined by SDS-PAGE, were 25, 50, 34, and 19 kDa, respectively. Gel filtration of the four purified enzymes in native conditions indicated that active keratinase KI is a novel ho...

A novel feather-degrading Bacillus Sp. was isolated from chick manure. The bacterium produces keratinolytic enzyme using chicken feather as a sole of carbon and nitrogen source. The effect of temperature, pH on keratinase production of this keratinolytic strain was studied. Maximum enzyme activities were obtained within 48 hrs (780U/ml) of cultivation. The optimal conditions for the keratinolyt...

Microsporum canis is the main zoophylic dermatophyte in dogs and cats, and it is also an important zoonotic agent. The literature showed that cats are asymptomatic carriers of M. canis. This is apparently due to host resistance and/or the presence of strains with lower virulence. This study was aimed to evaluate the keratinolytic, elastinolytic and collagenolytic activities of M. canis strains ...

The effect of ozonized olive oil (Oleozone) on some pathogenic fungi (Aspergillus fumigatus, Candida albicans, Epidermophyton floccosum, Microsporum canis & Trichophyton rubrum), were tested. The olive oil was ozonized at Ozomaxe, Egypt, OZO3 VTT Cairo, Egypt by an ozone generator. Minimum inhibitory concentrations (MICs) were determined by the agar dilution method. Oleozone showed antimicrobia...

Plant growth promoting (PGP) rhizobacteria, a beneficial microbe colonizing plant roots, enhanced crop productivity and offers an attractive way to replace chemical fertilizers, pesticides, and supplements. The keratinous waste which comprises feathers, hairs, nails, skin and wool creates problem of solid waste management due to presence of highly recalcitrant keratin. The multi traits rhizobac...