作者: D. M. Lilly , R. H. Stillwell
DOI: 10.1126/SCIENCE.147.3659.747
关键词:
摘要: Several species of protozoa, during their logarithmic phases growth, produce substances that prolong the phase in other species. The effect is not as striking inhibition growth caused by antibiotics, but a consistent 50-percent increase has been obtained with Tetrahymena pyriformis response to factor produced Colpidium campylum.