Enzymatic hydrolysis of chitin pretreated by rapid depressurization from supercritical 1,1,1,2-tetrafluoroethane toward highly acetylated oligosaccharides - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Bioresource Technology Année : 2016

Enzymatic hydrolysis of chitin pretreated by rapid depressurization from supercritical 1,1,1,2-tetrafluoroethane toward highly acetylated oligosaccharides

Guadalupe Villa-Lerma
  • Fonction : Auteur
Humberto Gonzalez-Marquez
  • Fonction : Auteur
Miguel Gimeno
  • Fonction : Auteur
Laurent David
Shinsuke Ifuku
  • Fonction : Auteur
Keiko Shirai
  • Fonction : Auteur

Résumé

The hydrolysis of chitin treated under supercritical conditions was successfully carried out using chitinases obtained by an optimized fermentation of the fungus Lecanicillium lecanii. The biopolymer was subjected to a pretreatment based on suspension in supercritical 1,1,1,2-tetrafluoroethane (scR134a), which possesses a critical temperature and pressure of 101 degrees C and 40 bar, respectively, followed by rapid depressurization to atmospheric pressure and further fibrillation. This methodology was compared to control untreated chitins and chitin subjected to steam explosion showing improved production of reducing sugars (0.18 mg/mL), enzymatic hydrolysis and high acetylation (F-A of 0.45) in products with degrees of polymerization between 2 and 5.
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Dates et versions

hal-01397197 , version 1 (15-11-2016)

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Guadalupe Villa-Lerma, Humberto Gonzalez-Marquez, Miguel Gimeno, Stéphane Trombotto, Laurent David, et al.. Enzymatic hydrolysis of chitin pretreated by rapid depressurization from supercritical 1,1,1,2-tetrafluoroethane toward highly acetylated oligosaccharides. Bioresource Technology, 2016, 209, pp.180-186. ⟨10.1016/j.biortech.2016.02.138⟩. ⟨hal-01397197⟩
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