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Enzymatic activity of the cellulolytic complex produced by Trichoderma reesei. Enzymatic hydrolysis of cellulose ; Actividad enzimatica del complejo celulolitico producido por Trichoderma reesei. Hidrolisis enzimatica de la celulosa. The enzymatic activity characterization of the cellulolytic complex obtained from Trichoderma reesei QM and the influence of the enzymatic hydrolysis conditions on the hydrolysis yield are studied.

Pure cellulose and native or alkali pretreated biomass Onopordum nervosum have been used as substrates. The Microcuentos ejemplos yahoo dating of pH, temperature, substrate concentration and enzyme-substrate ratio for Microcuentos ejemplos yahoo dating optimum activity of that complex, evaluated as glucose and reducing sugars production, have been selected. Previous studies on enzymatic hydrolysis of 0.

Pretreatment of sugarcane bagasse using the advanced oxidation process by electron beam for enzymatic hydrolysis of cellulose ; Pre-tratamento do bagaco de cana utilizando o processo de oxidacao avancada por feixe de eletrons para hidrolise enzimatica da celulose.

The bagasse is composed of cellulosestraight chain of glucose, of hemicellulose, an amorphous polymer consisting of xylose, arabinose, galactose, and mannose, and of lignin, a complex polymer consisting of fenilpropan units that acts as waterproof coating on the fibers, which is hard to remove due its recalcitrant nature.

The aim of this work was to study the electron beam processing as a pretreatment of sugarcane bagasse to enzymatic hydrolysis of cellulose. The pretreatment of sugarcane bagasse is one of the most important steps to make this material economically Microcuentos ejemplos yahoo dating and competitive on the energy production. As a pretreatment the electron beam processing can weak the hemicellulose and lignin structures by the action highly reactive radicals that breaks the links, reducing the degree of polymerization fibers.

It was evaluated the chemical and Microcuentos ejemplos yahoo dating modifications on fibers caused by the irradiation, the enzymatic hydrolysis of electron beam as the only pretreatment and combined to steam explosion.

For enzymatic hydrolysis it was used the commercial enzymes from Novozymes. The radiation processing promotes changes in structure and composition of sugarcane bagasse, increasing the solubility, that is related to hemicellulose and cellulose cleavage, and also increasing the enzymatic conversion yield.

Ethanol from lignocellulosic biomasses; Etanolo da biomasse lignocellulosiche. Produzione di etanolo da paglia di grano mediante pretrattamento di steam explosion, idrolisi enzimatica e fermentazione. In this report are presented results achieved on the process optimisation of bioethanol production from wheat straw, carried out within the ENEA's project of biomass exploitation for renewable energy. The process consists of three main steps: The ethanologenic yeast Saccharomyces cerevisiae has been used to ferment the glucose in he hydrolyzates.

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It has been pointed out the necessity of washing with water the pretreated what straw, in order to remove the biomass degradation products, which have shown an inhibition effect on the yeast. Il processo esaminato consta di un pretrattamento mediante steam explosion della paglia, seguito da idrolisi enzimatica della cellulosa e fermentazione del glucosio ottenuto.

Per la fermentazione del glucosio negli idrolizzati e' stato impiegato il lievito Saccharomyces cerevisae. Directory of Open Access Journals Sweden. Full Text Available Introduccion: El Dermatophagoides fainae DF es un acaro cosmopolita presente en Microcuentos ejemplos yahoo dating polvo intradomiciliario. Este acaro es fuente importante de aereo-alergenos desencadenantes de asma y rinitis alergica. El proposito de este trabajo fue la produccion y caracterizacion de extractos alergenicos para uso en diagnostico alergologico y terapia.

Los extractos se prepararon a partir de cultivos puros in vitro de acaros.

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