Item request has been placed! ×
Item request cannot be made. ×
loading  Processing Request

Kinetic modelling of thermal inactivation of a keratinase from Purpureocillium lilacinum LPSC # 876 and the influence of some additives on its thermal stability

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
اقرأ أكثر حفظ في قائمتي
  • معلومة اضافية
    • بيانات النشر:
      Springer
    • Collection:
      CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
    • نبذة مختصرة :
      Thermal inactivation of a keratinase produced by Purpureocillium lilacinum LPSC #876 was kinetically investigated using several enzyme inactivation models at the temperature range of 50–65 °C. Among the models studied, the Weibull distribution was the best model that describes the residual activity of P. lilacinum keratinase after heat treatment over the selected temperatures. The stabilising effect of metal ions (Ca2+ or Mg2+, 5 mmol l−1 ) or polyols (propylene glycol and glycerol, 10 % v/v) was investigated, showing that the presence of Ca2+ increases the enzyme stability significantly. Conforming to the increased Ca2+ concentration, thermal stability of the enzyme also increased, with 10 mM of Ca2+ being the concentration of metal in which the enzyme retained 100 % of its original activity after being incubated for 1 h at 55 °C. The effects of temperature on Weibull equation parameters and on the characteristics of the inactivation curves were evaluated. In the absence of any additives (control), the reliable time (tR) of the keratinase, analogous to D value, ranged from 484.16 to 63.67 min, while in the presence of Ca2+ the tR values ranged from 6,221 to 414.95 min at 50– 65 °C. P. lilacinum keratinase is a potentially useful biocatalyst, and therefore, kinetic modelling of thermal inactivation addresses an important topic for its application in various industrial processes. ; Fil: Cavello, Ivana Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Centro de Investigación y Desarrollo En Fermentaciones Industriales. Universidad Nacional de la Plata. Facultad de Cs.exactas. Centro de Investigación y Desarrollo En Fermentaciones Industriales; Argentina ; Fil: Cavalitto, Sebastian Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Centro de Investigación y Desarrollo En Fermentaciones Industriales. Universidad Nacional de la Plata. Facultad de Cs.exactas. Centro de ...
    • File Description:
      application/pdf
    • ISSN:
      0273-2289
      1559-0291
    • Relation:
      info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs12010-014-0977-0; http://hdl.handle.net/11336/16055; Cavello, Ivana Alejandra; Cavalitto, Sebastian Fernando; Kinetic modelling of thermal inactivation of a keratinase from Purpureocillium lilacinum LPSC # 876 and the influence of some additives on its thermal stability; Springer; Applied Biochemistry And Biotechnology; 173; 7; 8-2014; 1927-1939
    • الدخول الالكتروني :
      http://hdl.handle.net/11336/16055
    • Rights:
      info:eu-repo/semantics/openAccess ; https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
    • الرقم المعرف:
      edsbas.DEFA848A