Question

Diffusion method in microbiological assay

Answer 1

diffusion is the movement of particles from its lower concentration to its lower concentration

Answer 2

Answer:

A microbiological plate method, with Sarcina Zutea as test organism, is described for the assay of penicillin in feeding stuffs. The method is capable of determining penicillin in samples containing less than 5 units per g, at which level plate assay methods with Bacillus subtilis are insufficiently sensitive.