During high speed blending of two strains of Penicillium chrysogenum,
fragmentation of the mycelia was accompanied by considerable (strain d
ependent) biomass loss. The mean clump size decreased significantly, a
nd the freely-dispersed hyphae became shorter and less branched on ave
rage. The homogeneity of the samples increased with duration of blendi
ng. The more recent Panlabs P1 strain was significantly more resistant
to blending with respect to biomass loss than NRRL 1951.