, Volume 33, Issue 3, pp 401–402 | Cite as

A turbidimetric method for the screening of amylase-producing mutants of Aspergillus niger

  • S. Eswaran
  • B. H. Nga
Pro Experimentis


The method is based on the assumption that extracellular amylase, which is produced by strains ofAspergillus niger in liquid culture, hydrolyses the starch in the media and brings about a corresponding decrease in the turbidity of the media. Mutant strains which produced different quantities of amylase exhibited different degrees of decrease in turbidity of the media. The results showed that a greater degree of decrease in turbidity was observed for a higher quantity of amylase produced.


Starch Turbidity Aspergillus Amylase Great Degree 
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Copyright information

© Birkhäuser Verlag 1977

Authors and Affiliations

  • S. Eswaran
    • 1
  • B. H. Nga
    • 1
  1. 1.Botany DepartmentUniversity of SingaporeSingapore 10(Singapore)

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