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Optimization of lipase production by Staphylococcus warneri EX17 using the polydimethylsiloxanes artificial oxygen carriers

by Rech, Fernanda Roberta , Ayub, Marco Antônio Záchia , Volpato, Giandra

in Biochemistry / biodiesel / Biodiesel fuels / Bioinformatics / Biological and medical sciences / Biomedical and Life Sciences / Bioreactors / biosynthesis / Biotechnology / Carbon / Carbon sources / Cell growth / chemistry / Cultivation / Culture Media / Design / Dimethylpolysiloxanes / Dimethylpolysiloxanes - chemistry / Enzymes / enzymology / Experimental design / Experiments / Food / Fundamental and applied biological sciences. Psychology / Genetic Engineering / Glycerol / Glycerol - metabolism / Independent variables / Inorganic Chemistry / Life Sciences / Lipase / Lipase - biosynthesis / Mass transfer / Metabolism / Microbiology / Optimization / Optimization techniques / Original Paper / Oxidation / Oxygen / response surface methodology / Staphylococcus / Staphylococcus - enzymology / Staphylococcus warneri / Studies / triacylglycerol lipase / Variables

2011

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Optimization of lipase production by Staphylococcus warneri EX17 using the polydimethylsiloxanes artificial oxygen carriers

by Rech, Fernanda Roberta , Ayub, Marco Antônio Záchia , Volpato, Giandra

2011

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Optimization of lipase production by Staphylococcus warneri EX17 using the polydimethylsiloxanes artificial oxygen carriers

by Rech, Fernanda Roberta , Ayub, Marco Antônio Záchia , Volpato, Giandra

2011

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Journal Article

Optimization of lipase production by Staphylococcus warneri EX17 using the polydimethylsiloxanes artificial oxygen carriers

Rech, Fernanda Roberta,

Ayub, Marco Antônio Záchia,

Volpato, Giandra

2011

Overview

In this research, the combined effects of polydimethylsiloxane (PDMS) and different conditions of oxygen volumetric mass transfer coefficient (kLa) on lipase production by Staphylococcus warneri EX17 were studied and optimized in bioreactor cultures. Raw glycerol from biodiesel synthesis was used as the sole carbon source. Full-factorial central composite design and the response surface methodology were employed for the experimental design and analysis of the results. The optimal polydimethylsiloxane concentration and mass coefficient transfer (kLa) were found to be 13.5% (v/v) and 181 h−1, respectively. Under these conditions, the maximal cell production obtained was 10.0 g/l, and the volumetric lipase activities of approximately 490 U/l, after 6 h of cultivation. These results are in close agreement with the model predictions. Results obtained in this work reveal the positive effects of PDMS on oxygen volumetric mass transfer coefficient (kLa) in the Staphylococcus warneri EX17 cultivation and lipase production.

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Publisher

Springer-Verlag,Oxford University Press,Springer

Subject

/ Biological and medical sciences

/ Biomedical and Life Sciences

/ Bioreactors