Appearance (Colour)
Brownish yellow
Appearance (Form)
Free flowing ,homogeneous powder
Solubility (Colour) 2% aq. solution
Medium amber to yellowish brown, clear
pH (25°C)
7.0 ± 0.5 (2%)
Stability (After autoclaving)
Medium amber to yellowish brown, clear
Loss on drying
< 5.0 %
Nitrogen content (N)
9.0 - 11.0%
NaCl
< 5.0 %
Ash
11.0 - 16.0 %
Total Aerobic microbial count
(By plate count method) : <= 10, 000 cfu/gm
Total Yeast and Mould count
(By plate count method) : < = 100 cfu/gm
Coagulable Protein Test
Passes test
Cultural Response
Growth Promotion Parameters :
Inoculate and incubate at 37° C for 18 - 24 hours
Organism
Escherichia coli ATCC 25922
Inoculum (cfu) 10-100
Growth : Good
Organism
Staphylococcus aureus ATCC 25923
Inoculum (cfu) 10-100
Growth : Good
Organism
Bacillus subtilis ATCC 6633
Inoculum (cfu) 10-100
Growth : Good
Indole Production (0.1%)
Escherichia coli ATCC 25922
Growth : Good, Result : Positive
Applications
Water soluble portion of autolysed yeast especially rich in B-complex vitamins used in microbiological and fermentation media.
