Jana Georgieva

  • Citations Per Year
Learn More
The oral toxicity of excretion products of several Photorhabdus and Xenorhabdus strains was tested on two thrips species: Frankliniella occidentalis and Thrips tabaci. Out of 46 Photorhabdus isolates and six Xenorhabdus isolates only six North American P. temperata isolates were toxic to the thrips species. After 7 days of drinking from P. temperata(More)
The oral toxicity of excretion products of several Photorhabdus and Xenorhabdus strains was tested on two thrips species: Frankliniella occidentalis and Thrips tabaci. Out of 46 Photorhabdus isolates and 6 Xenorhabdus isolates only 6 North American P. temperata isolates were toxic to the thrips species. After 7 days of drinking from P. temperata supernatant(More)
  • Jana Georgieva
  • Methods and findings in experimental and clinical…
  • 1989
The effects of the diterpene sclareol glycol (SG) of the labdane family on convulsive seizures induced by pentylenetetrazole (PTZ), picrotoxin and bicuculline in mice were studied. Sclareol glycol potentiated convulsive seizures induced by PTZ (60 and 80 mg/kg) and antagonized the anticonvulsant effect of diazepam. At low doses, SG gave a protective effect(More)
  • Jana Georgieva
  • Methods and findings in experimental and clinical…
  • 1990
In a punished drinking test in rats sclareol glycol (SG) decreased the number of punished responses ("proconflict response") while diazepam had the opposite effect; SG antagonized the "anticonflict response" of diazepam. Post-training administration of SG in rats enhanced retention in active avoidance task evaluated 24 h later. SG produced an increase in(More)
The effects of a reversible activator of adenylate cyclase sclareol glycol (SG), a semisynthetic diterpene of the labdane family, on the aggressive behavior induced by a high dose of clonidine in mice were studied. SG was applied at doses well below the lethal dose. Aggressive behavior induced by clonidine at a dose of 30 mg/kg IP was decreased in a(More)
  • Jana Georgieva
  • Methods and findings in experimental and clinical…
  • 1989
The effects of the diterpene sclareol glycol (SG) of the labdane family on rectal body temperature in rats were studied. Sclareol glycol induced dose-dependent changes in temperature. At the lowest dose (5 mg/kg) SG produced a decrease followed by an increase in temperature; at the middle dose it produced a decrease and at the largest dose, an increase in(More)
240 зтаммов актиномицетов, выделенных из ризосферы различных растений и из различных почв, исследовались на наличие витамина В12 путем культивирования в жидкой питательной среде. 73% из исследованных штаммов обладают способностью образовывать витамин В12, в количестван порядка 0,0025–1,6 μ/мл. Количество продуцентов зависит от растительного покрова. Серия(More)
  • Jana Georgieva
  • Methods and findings in experimental and clinical…
  • 1990
The effects of a reversible activator of adenylate cyclase sclareol glycol (SG), a semisynthetic diterpene of the labdane family, on acute hypoxia (asphyctic, hemic-induced by 300 mg/kg of sodium nitrite injected subcutaneously, and histotoxic-induced by 20 mg/kg sodium nitroprusside injected intraperitoneally) in mice were studied. SG was applied at doses(More)
Using pentylenetetrazol (PTZ) in subconvulsant doses, it was found that the semisynthetic diterpene sclareol glycol (SG) from the labdane family of diterpenes at a dose well below the lethal dose, although not being convulsant, had a proconvulsant action in mice. This action is indicated by the number of mice undergoing convulsions and the reduction of(More)
A total of 1257 Actinomycetes strains, the majority of which of the albus, griseus and globisporus series, were isolated from 345 samples from the rhizosphere of various plants and soils. According to these observations the cultivation of the soil is not of paramount importance for the quantitative and species composition of the Actinomycetes. The(More)