Wednesday, November 9, 2011

Lab 10/20: Glucose, Lactose, Sucrose, TSIA, Gelatin Results!

Results of these tests from 10/18:







Glucoseà Yellow, meaning it used the sugar, but there was no gas in it (if there was, bubbles would have appeared)
Lactoseà Red
SucroseàYellow, meaning it used the sugar, there was no gas present            here either.
TSIAà Red Slant with a Yellow Butt. The yellow butt indicates that the bacteria maintained growth in acidic conditions, but only the bacteria used the glucose.
Gelatinà We noticed that the bacteria grew in this slant after observing it in room temperature, and then we put this slant in the refrigerator for 15 minute. After taking it out, we noticed that it turned to liquid and therefore, the Gelatin test was positive (a negative test would have been solid). 

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