2644 - CSUN ScholarWorks - California State University, Northridge

Journal of Student Research Abstracts · 77
+ 2% starch. I observed the bacteria growth and the surrounding halos after two days of incubation at 37°C. I
observed the fungi growth and the surrounding halos after four days of incubation at 37°C. Since the area of
the halo surrounding the bacteria colonies and molds is proportional to the amount of amylase produced, I
measured the diameter of the halo that surrounded the bacteria colonies and molds. There were halos, which
ranged in diameters, surrounding 13 colonies of bacteria but there were no halos surrounding 2 moids. My prediction
that bacteria would produce more amylase than molds was supported by the results of the investigation
(0.01