2011
DOI: 10.1007/s10971-011-2596-3
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Catalytic activity and stability of laccase entrapped in sol–gel silica with additives

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Cited by 37 publications
(18 citation statements)
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“…25 The spectra of silica aerogels in this study and xerogel obtained by the same technique by Souza et al, 12 showed similar bands at determined wavenumbers between 1000 and 1100, which corresponds to Si-O-R bonds of 800 cm -1 (Si-O-Si), 450 cm -1 (Si-O) and -OH groups in the range between 3400 and 3500 cm -1 . The spectra obtained for the immobilized biocatalysts by different immobilization methods in the absence and presence of protic ionic liquid ( Figure 5) showed that beyond the characteristic bands of silanol groups there were bands in the range of wavenumbers between 1600 and 1700 cm -1 (amide I), 1390 cm -1 corresponding to C -H groups with CH 3 bonds, and 695 cm -1 (amide IV and/or V), showing the efficiency of the immobilization of BC lipases in the studied methods.…”
Section: Fourier Transform Infrared Spectroscopy -Ftir Analysissupporting
confidence: 75%
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“…25 The spectra of silica aerogels in this study and xerogel obtained by the same technique by Souza et al, 12 showed similar bands at determined wavenumbers between 1000 and 1100, which corresponds to Si-O-R bonds of 800 cm -1 (Si-O-Si), 450 cm -1 (Si-O) and -OH groups in the range between 3400 and 3500 cm -1 . The spectra obtained for the immobilized biocatalysts by different immobilization methods in the absence and presence of protic ionic liquid ( Figure 5) showed that beyond the characteristic bands of silanol groups there were bands in the range of wavenumbers between 1600 and 1700 cm -1 (amide I), 1390 cm -1 corresponding to C -H groups with CH 3 bonds, and 695 cm -1 (amide IV and/or V), showing the efficiency of the immobilization of BC lipases in the studied methods.…”
Section: Fourier Transform Infrared Spectroscopy -Ftir Analysissupporting
confidence: 75%
“…23,24 The presence of PIL can be actuated as a polyvinylalcohol (PVA) additive during the immobilization or synthesis of the support, possibly by modifying the hydrophobicity of the microenvironment because of its influence on the moisture of lipase. 25 The lipase immobilization on aerogels supports by physical adsorption, the literature reports inferior results to those obtained when immobilized lipase from Candida rugosa on methyl-modified silica aerogel, which reached the total activity recovery yield was 56.44% in hydrolysis reaction. 26 The literature thus suggests that the use of immobilized BC lipase in the absence and presence of PIL in aerogel supports showed promising performance in the hydrolysis of olive oil.…”
Section: Influence Of Immobilization Methods In Silica Aerogel In the mentioning
confidence: 96%
“…Esse resultado de rendimento pode ser devido a utilização de macromoléculas tais como polietilenoglicol (PEG) no processo de imobilização para induzir uma melhor distribuição da lipase na superfície do suporte, o que permite um melhor contato da enzima imobilizada com o meio reacional, favorecendo as condições reacionais, com consequência o aumento da atividade e do rendimento (Rocha et al, 1998;Soares et al, 2006;Mohidem et al, 2012;Souza et al, 2014).…”
Section: Resultados E Discussõesunclassified
“…O presente trabalho apresentou valores maiores de rendimento dos quais encontrados na literatura, além de mostrar o efeito positivo do PEG sobre o processo de imobilização da CALB, o que confirma os dados da literatura que indicam aditivos de baixa massa molecular, tais como o PVA e PEG aumentam a atividade catalítica de enzimas (Soares et al, 2003;Mohidem et al, 2012).…”
Section: Resultados E Discussõesunclassified
“…These additives include osmolytes (i.e., sugars), polymers, 75 chelating agents, 76 salts, 77 and surfactants. They are thought to operate by two mechanisms.…”
Section: Enhancing the Activity And Stability Of Proteinsmentioning
confidence: 99%