title: [Biological action of an unidentified factor from streptomycetes].
abstract: Studied were a total of 926 actinomycetic strains. In 285 of them (27.8 per cent) there was a capacity to synthesize growth factors which stimulated the production of fruit bodies of the mycelial fungus 2x. The culture liquid of two of the producent strains, 210-c and 192-B, was given as a supplement to the ordinary feed ration of albino mice. It was found that birth rate rose twice with the test groups. Histologically, a stimulant action was demonstrated with regard to ovogenesis in terms of the earlier maturation of follicles and formation of corpora lutea both in rats and in 4-5-month-old lambs.
mesh_terms: D000818:Animals; D003338:Corpus Luteum / Q000187:drug effects; D005260:Female; D005658:Fungi / Q000187:drug effects; D006133:Growth Substances / Q000494:pharmacology*; D009866:Oogenesis / Q000187:drug effects; D006080:Ovarian Follicle / Q000187:drug effects; D011247:Pregnancy; D051381:Rats; D011919:Rats, Inbred Strains; D012756:Sheep; D013268:Stimulation, Chemical; D013306:Streptomycetaceae
chemical_list: D006133:Growth Substances
vernacular_title: Biologichno deĭstvie na neidentifitsiran faktor ot streptomitseti.