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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Prediction and comparison of textural properties of magnetic copolymer supports for enzyme immobilization

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Autor(es):
Rosa, Cintia Maria Rodrigues [1] ; Casagrande da Silva, Mateus Vinicius [1] ; de Aguiar, Leandro Goncalves [1] ; de Castro, Heizir Ferreira [1] ; Freitas, Larissa [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Sch Engn Lorena, Dept Chem Engn, Lorena, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Journal of Applied Polymer Science; v. 137, n. 41 MAR 2020.
Citações Web of Science: 0
Resumo

Magnetic polymers supports have proven to be valuable materials for enzyme immobilization, as they allow recovering the catalyst by magnetic separation, precluding the need for costly and time-consuming separation steps. In this study, magnetic copolymer supports were synthesized using styrene (STY) and different crosslinking agents (divinylbenzene, ethylene glycol dimethacrylate, or triethylene glycol dimethacrylate) and initiators (azobisisobutyronitrile or benzoyl peroxide) and used to immobilize Candida antarctica lipase B (CALB). The aim was to obtain biocatalysts with high enzymatic activity and satisfactory morphological properties for use in biotransformation reactions. Two morphological properties known to influence the immobilization yield were taken into consideration, specific surface area, and swelling index. Experimental data were compared to the predictions of a model based on molar balance, method of moments, numerical fractionation, and elementary gel structures. The high correlation (R-2 = 0.9974) between experimental and predicted values demonstrated the suitability of the model for estimating the textural properties of enzyme supports. CALB was successfully immobilized, showing high hydrolytic activity (500-700 U g(-1)) and good thermal stability at 50 degrees C. CALB/STY-EGDMA-M was 14 times more stable than free CALB. The results confirm the efficiency of the immobilization method and the suitability of the copolymers for enzyme immobilization. (AU)

Processo FAPESP: 17/04934-9 - Síntese e caracterização de partículas poliméricas à base de estireno com propriedades magnéticas para utilização como matriz de imobilização de enzimas
Beneficiário:Cintia Maria Rodrigues Rosa
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 16/17833-3 - Síntese de ésteres emolientes catalisada por lipase imobilizada em copolímeros à base de estireno com propriedades magnéticas
Beneficiário:Larissa de Freitas
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
Beneficiário:Roberto de Campos Giordano
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Temático