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Produção de ésteres etílicos utilizando enzimas livres

Produção de ésteres etílicos utilizando enzimas livres


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About the Book

A produção de ésteres etílicos pela transesterificação enzimática dos óleos de canola e nabo forrageiro utilizando as lípases de Burkholderia cepacia e Thermomyces lanuginosus foi estudada empregando a metodologia de superfícies de resposta. A temperatura, a razão molar álcool: óleo e a quantidade de enzima foram as variáveis avaliadas. As resposta foram a atividade de consumo de triacilglicerol, a atividade de produção de éster, a conversão de triacilglicerol e o rendimento de éster. Os resultados mostraram que a lípase de Burkholderia cepacia apresentou resistência à temperatura e a altas razões molares álcool: óleo, porém, sem alta seletividade à produção de éster. O maior rendimento observado foi de 47,08% utilizando o óleo de canola e 39,98% o óleo de nabo forrageiro. Já a lípase de Thermomyces lanuginosus apresentou altos rendimentos de éster - 85,78% e 71,38%, para o óleo de canola e nabo forrageiro, respectivamente, além de rápida conversão dos triacilglicerídeos. No entanto sofreu forte inativação quando a temperatura foi superior a 50°C. As superfícies de respostas obtidas do planejamento experimental foram capazes de prever no mínimo 88% da variância total do sistema.


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Product Details
  • ISBN-13: 9786130168766
  • Publisher: Novas Edicoes Academicas
  • Publisher Imprint: Novas Edicoes Academicas
  • Height: 229 mm
  • No of Pages: 156
  • Series Title: Portuguese
  • Weight: 290 gr
  • ISBN-10: 6130168764
  • Publisher Date: 11 Sep 2015
  • Binding: Paperback
  • Language: Portuguese
  • Returnable: N
  • Spine Width: 9 mm
  • Width: 152 mm


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