Display options
Share it on

Springerplus. 2013 Aug 13;2:380. doi: 10.1186/2193-1801-2-380. eCollection 2013.

Bioprocess and biotecnology: effect of xylanase from Aspergillus niger and Aspergillus flavus on pulp biobleaching and enzyme production using agroindustrial residues as substract.

SpringerPlus

Nelciele Cavalieri de Alencar Guimaraes, Michele Sorgatto, Simone de Carvalho Peixoto-Nogueira, Jorge Henrique Almeida Betini, Fabiana Fonseca Zanoelo, Maria Rita Marques, Maria de Lourdes Teixeira de Moraes Polizeli, Giovana C Giannesi

Affiliations

  1. Laboratory of Biochemistry, CCBS - Universidade Federal de Mato Grosso do Sul/UFMS, Av Costa e Silva s/n°, Campo Grande, MS 79070-900 Brazil.

PMID: 24010038 PMCID: PMC3755788 DOI: 10.1186/2193-1801-2-380

Abstract

This study compares two xylanases produced by filamentous fungi such as A. niger and A. flavus using agroindustrial residues as substract and evaluated the effect of these enzymes on cellulose pulp biobleaching process. Wheat bran was the best carbon source for xylanase production by A. niger and A. flavus. The production of xylanase was 18 and 21% higher on wheat bran when we compare the xylanase production with xylan. At 50°C, the xylanase of A. niger retained over 85% activity with 2 h of incubation, and A. flavus had a half-life of more than 75 minutes. At 55°C, the xylanase produced by A. niger showed more stable than from A. flavus showing a half-life of more than 45 minutes. The xylanase activity of A. niger and A. flavus were somehow protected in the presence of glycerol 5% when compared to the control (without additives). On the biobleaching assay it was observed that the xylanase from A. flavus was more effective in comparison to A. niger. The kappa efficiency corresponded to 36.32 and 25.93, respectively. That is important to emphasize that the cellulase activity was either analyzed and significant levels were not detected, which explain why the viscosity was not significantly modified.

Keywords: Agroindustrial residues; Aspergillus flavus; Aspergillus niger; Biobleaching; Wheat bran

References

  1. J Ind Microbiol Biotechnol. 2001 Mar;26(3):156-60 - PubMed
  2. Bioresour Technol. 2008 Sep;99(13):5938-41 - PubMed
  3. Biosci Biotechnol Biochem. 2011;75(6):1129-34 - PubMed
  4. Bioprocess Biosyst Eng. 2011 Mar;34(3):347-55 - PubMed
  5. J Basic Microbiol. 2003;43(4):269-77 - PubMed
  6. Biodegradation. 2011 Nov;22(6):1143-54 - PubMed
  7. N Biotechnol. 2010 Dec 31;27(6):810-5 - PubMed
  8. Bioresour Technol. 2010 Oct;101(19):7563-9 - PubMed
  9. Enzyme Res. 2011;2011:593624 - PubMed
  10. Appl Microbiol Biotechnol. 2005 Nov;69(1):71-8 - PubMed
  11. Bioprocess Biosyst Eng. 2010 Sep;33(7):813-21 - PubMed
  12. Appl Biochem Biotechnol. 2010 Nov;162(6):1626-34 - PubMed
  13. Bioresour Technol. 2011 Oct;102(20):9723-9 - PubMed
  14. Appl Biochem Biotechnol. 2011 Jun;164(3):294-304 - PubMed
  15. Bioprocess Biosyst Eng. 2009 Oct;32(6):819-24 - PubMed
  16. J Ind Microbiol Biotechnol. 2009 Jan;36(1):149-55 - PubMed
  17. J Sci Food Agric. 2012 Sep;92(12):2569-73 - PubMed
  18. J Biosci Bioeng. 2009 May;107(5):494-8 - PubMed
  19. Bioresour Technol. 2013 Jan;128:290-6 - PubMed
  20. Appl Microbiol Biotechnol. 2005 Jun;67(5):577-91 - PubMed
  21. J Biol Chem. 1951 Nov;193(1):265-75 - PubMed

Publication Types