Produção de invertase por Saccharomyces cerevisiae
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Produção de invertase por Saccharomyces cerevisiae

Produção de invertase por Saccharomyces cerevisiae


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About the Book

As Saccharomyces são conhecidas popularmente como "leveduras". A levedura é um fungo unicelular. Cresce em substâncias açucaradas, sumos de fruta e na superfície dos frutos. São vulgarmente designados por "fungos do açúcar". São saprófitas e algumas espécies são parasitas. Alguns deles vivem como simbiontes em insectos. Geralmente, a sua natureza é microscópica. As células têm uma forma oval, esférica ou elipsoidal. A levedura era utilizada na indústria da panificação. Por isso, a levedura é vulgarmente designada por levedura de padeiro. As leveduras não possuem clorofila e são heterotróficas no seu modo de nutrição. Na célula de levedura encontram-se duas enzimas extracelulares, a invertase e a maltase. A invertase transforma a sacarose em glucose e frutose. A maltase converte a maltose em glucose. A levedura também contém um complexo enzimático intracelular, nomeadamente a zimase. Na ausência de oxigénio, a zimase converte o açúcar em álcool etílico e dióxido de carbono, o que se designa por fermentação. Durante este processo de fermentação é libertada energia. A energia (27 K.cals de energia) libertada durante este processo é utilizada pelas leveduras no crescimento, reprodução, etc. Este processo ocorre na ausência de oxigénio e é designado por fermentação anaeróbia.


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Product Details
  • ISBN-13: 9786206660170
  • Publisher: KS Omniscriptum Publishing
  • Binding: Paperback
  • Language: Portuguese
  • Returnable: N
  • Weight: 317 gr
  • ISBN-10: 6206660176
  • Publisher Date: 10 Nov 2023
  • Height: 229 mm
  • No of Pages: 176
  • Spine Width: 10 mm
  • Width: 152 mm


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