Consequences of advances in agricultural technologies for the distribution of segetal plant communities and species in the Republic of Bashkortostan
G. R. Khasanovaa, *, M. V. Lebedevab, **, B. M. Mirkinc, and L. G. Naumovad, *** aBashkir State Agrarian University, Ufa, 450001 Russia bBotanical Garden-Institute, Ufa Scientific Center, Russian Academy of Sciences, Ufa, 450080 Russia cUfa Institute of Biology, Russian Academy of Sciences, 450054 Russia dBashkir State Pedagogical University, Ufa, 450000 Russia *e-mail: gulnazrim@yandex.ru **e-mail: lebedevamv@mail.ru ***е-mail: leniza.gumerovna@yandex.ru Received May 12, 2016
Segetal vegetation of Central Yakutia
Seven associations of segetal vegetation are distinguished for the vast arable lands of Central Yakutia. Low species richness and the prevalence of annual weeds are the main features of these communities. Only two dominant speciesSphallerocarpus gracilis andSaussurea amara represent Asian types of areals. Other dominantsFallopia convolvulus, Elytrigia repens, Chenopodium album, Brassica campestris, Lappula squarrosa, Scutellaria galericulata, Thlaspi arvense, Avena fatua andCrepis tectorum are typically cosmopolitan. The phytosociological system of the segetal communities is described.
Effect of a new inhibitor of cholesterol biosynthesis (AY 9944) on serum and tissue sterols in the rat.
AY 9944 is a novel inhibitor of cholesterol biosynthesis which appears to act on the Delta 7-reductase enzyme, interfering with the conversion of 7-dehydrocholesterol to cholesterol. In all tissues studied, with the exception of the lens, there was a reduction in cholesterol and a marked accumulation of 7-dehydrocholesterol. Isotope studies showed a reduced uptake of acetate into cholesterol, and an increased uptake into 7-dehydrocholesterol, in various tissues in vivo and by skin samples in vitro. There was no apparent accumulation of lanosterol or of the methostenols in the rat skin.