18 research outputs found
The Gender Trouble with Wilderness (Review of: Nature\u27s Altars: Mountains, Gender, and American Environmentalism by Susan R. Schrepfer)
Reviews Susan R. Schrepfer\u27s \u27Nature\u27s Altars: Mountains, Gender, and American Environmentalism\u27 (2005)
Environmental Problems and the State of Compliance with the Right to a Healthy Environment in a Mining Region of México
Sinkhole-Native Oil-Degrading Microbial Consortium for Hydrocarbon-Polluted Seawater Remediation
Dynamic Technique to Determine Hexadecane Transfer Rate from Organic Phase to Aqueous Phase in a Three-Phase Bioreactor
High fungal-mediated leaching efficiency of valuable metals from deep-sea polymetallic nodules
Concentration effects of main components of synthetic culture media on oxygen transfer in bubble column bioreactors
A Bend in the Road: Subject Personal Pronoun Expression in Spanish after 30 Years of Sociolinguistic Research
From Agricultural Waste to Biofuel: Enzymatic Potential of a Bacterial Isolate Streptomyces fulvissimus CKS7 for Bioethanol Production
Purpose To avoid a negative environmental and economic impact of agricultural wastes, and following the principles of circular economy, the reuse of agricultural wastes is necessary. For this purpose, isolation of novel microorganisms with potential biotechnological application is recommended. The current researches in bioethanol production are aimed to reduce the production costs using low-cost substrates and in-house produced enzymes by novel isolated microorganisms. In line with this, in this study valorization of these agricultural by-products by novel isolate S. fulvissimus CKS7 to biotechnological value added products was done. Methods Standard microbiological methods were used for the isolation and characterization of strain. Enzymes activities were determinated using DNS method while, the ethanol concentration was determined based on the density of the alcohol distillate at 20 degrees C. Results The maximal enzymatic activities for amylase, cellulases (carboxymethyl cellulase and Avicelase), pectinase and xylanase were achieved using rye bran as a waste substrate for CKS7 growth. Obtained crude bacterial enzymes were used for enzymatic hydrolysis of lignocellulosic materials including horsetail waste, yellow gentian waste, corn stover, cotton material and corona pre-treated cotton material. The maximum yield of reducing sugars was obtained on horsetail waste and corona pre-treated cotton material. Waste brewer's yeast Saccharomyces cerevisiae was successfully used for the production of bioethanol using horsetail waste hydrolysate and corona pre-treated cotton material hydrolysate. Conclusion The obtained results showed that bacterial strain CKS7 has a significant, still unexplored enzymatic potential that could be used to achieve a cleaner, environmental friendly and economically acceptable biofuel production. [GRAPHICS]