2009
DOI: 10.1016/j.molcatb.2009.01.010
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Lipase entrapment in a zirconia matrix: Sol–gel synthesis and catalytic properties

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Cited by 44 publications
(26 citation statements)
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“…These issues can be addressed through the immobilization of the lipase on water insoluble carriers allowing the development of continuous processes, an easier separation of products, the reuse of the catalyst and, in some cases, the enhancement of lipase stability and its catalytic activity in non-aqueous media [2,3]. Enzymes can be immobilized by several techniques, such as entrapment [4], cross-linking [5], covalent bonding [6] and physical adsorption [7]. In the latter, the nature of the support is very important in determining the efficiency of the immobilization, as it can influence the conformation of the enzyme during adsorption [3].…”
Section: Introductionmentioning
confidence: 99%
“…These issues can be addressed through the immobilization of the lipase on water insoluble carriers allowing the development of continuous processes, an easier separation of products, the reuse of the catalyst and, in some cases, the enhancement of lipase stability and its catalytic activity in non-aqueous media [2,3]. Enzymes can be immobilized by several techniques, such as entrapment [4], cross-linking [5], covalent bonding [6] and physical adsorption [7]. In the latter, the nature of the support is very important in determining the efficiency of the immobilization, as it can influence the conformation of the enzyme during adsorption [3].…”
Section: Introductionmentioning
confidence: 99%
“…There are numerous applications for nanotechnology referred as "nanomedicine" by the National Institute of Health (Bethesda, MD, USA): biosensing (Pirozzi et al 2009;Kaushik et al 2009), biological separation (Gül-tekin et al 2009), molecular imaging (Song et al 2009) and anticancer therapy (Zhou et al 2009;Kuo et al 2009), these applications are related with their novel properties and functions that differ from their bulk counterparts (Gao and Xua 2009). Although all these nanomedical devices allow new opportunities for many diseases, their practical application has been limited by problems with toxicity, instability, and/or lack of selectivity.…”
Section: Introductionmentioning
confidence: 99%
“…A lipase de Aspergillus niger encapsulada em sol-gel tem demonstrado menores perdas de massa do que os biocatalisadores obtidos por Souza et al (2012) e Pirozzi et al (2009, cujas perdas de massa foram de 45% e 44,4% para a lipase de Burkholderia cepacia encapsulada em sol-gel e lipase de Rhizopous oryzae encapsulada em zircônio pela técnica sol-gel, respectivamente. Por outro lado, Soares et al (2004) tem obtido para a lipase de Candida rugosa encapsulada em matriz sol-gel perda de massa de aproximadamente 25%, inferior à obtida neste trabalho.…”
Section: Análise Termogravimétrica (Tg)unclassified
“…Os processos envolvendo matrizes sol-gel estão ganhando uma importância crescente como suporte sólido para a imobilização de biomoléculas a ser usado em biocatálise, biossensores e aplicações biomédicas, oferecendo uma alternativa à tradicional tecnologia de polímeros (Pirozzi et al 2009). O processo solgel envolve em primeira etapa, a hidrólise de um metal de baixo peso molecular, precursor alcóxido como tetrametoxissilano (TMOS), ou tetraetoxissilano (TEOS) na presença de água em pH ácido (ou alcalino), o que resulta na formação de grupos reativos do tipo silanol (Si-OH).…”
Section: Introductionunclassified