Immobilization of lipases on agarose and chitosan and application in biocatalysis

• Grant number: 12/09054-3
• Support type: Scholarships in Brazil - Master
• Effective date (Start): September 01, 2012
• Effective date (End): June 30, 2014
• Field of knowledge: Physical Sciences and Mathematics - Chemistry
• Principal Investigator: Mauricio Boscolo
• Grantee: José Carlos Quilles Junior
• Home Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil
• Associated scholarship(s): 13/00530-0 - Immobilization and stabilization of lipases from Candida antarctida: fraction b and its application in biocatalysis, BE.EP.MS

Abstract

Lipases (E.C. 3.1.1.3) are serine-hydrolases which catalyze hydrolysis, esterification and transesterification of acyl glicerides of long chain. Biodiesel, defined as a mix of mono alkyl esters of long chain fatty acid has attracted an increasing interest as a renewable energy source to replace the diesel produced from petroleum. The presented project proposes the study of routes don't investigated for immobilization of lipases techniques from a microbial source, obtained from fungi Acremonium sp, by covalent bonds in modified chitosan with glioxil, epoxy groups and glycidol, and by adsorption on hydrophobic supports, such as phenyl-agarose and octyl-agarose. Immobilized lipases will be compared to commercial lipase Thermomyces lanuginosus, taken as a reference in this work and immobilized under the same conditions. The stability of both immobilized lipases will be evaluated to the pH and temperature. The immobilized lipases will be applied in the transesterification reaction in order to obtain ethyl biodiesel, in which the produced esters will be quantified by gas and liquid chromatography coupled to mass spectrometry. It will also be evaluated the use of ultrasound in the process of biodiesel production, since that form of energy enhances the enzymatic activity. Supports will be characterized as to porosity and surface area, FTIR-ATR, thermal stability by TC and DSC.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

QUILLES JUNIOR, JOSE CARLOS; FERRAREZI, ANA LUCIA; BORGES, JANAINA PIRES; BRITO, RAFAELA RODRIGUES; GOMES, ELENI; DA SILVA, ROBERTO; MANUEL GUISAN, JOSE; BOSCOLO, MAURICIO. Hydrophobic adsorption in ionic medium improves the catalytic properties of lipases applied in the triacylglycerol hydrolysis by synergism. Bioprocess and Biosystems Engineering, v. 39, n. 12, p. 1933-1943, DEC 2016. Web of Science Citations: 4.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

JUNIOR, José Carlos Quilles. Imobilização de lipases por adsorção e ligação covalente em derivados de agarose e quitosana e sua aplicação em biocatálise. 2014. 104 f. Master's Dissertation - Universidade Estadual Paulista "Júlio de Mesquita Filho" Instituto de Biociencias, Letras e Ciencias Exatas..