| http://www.w3.org/ns/prov#value | - Robert Koch used gelatin to prepare solid media but it was not an ideal because ( i ) Since gelatin is a protein, it is digested by many bacteria capable of producing a proteolytic exoenzyme gelatinase that hydrolyses the protein to amino acids. (ii) It melts when the temperature rises above 25??C.PowerPoint Presentation: Koch's postulatesPowerPoint Presentation: Fanne Eilshemius Hesse (1850 - 193
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