Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Karel VOKÁČ"'
Publikováno v:
European Journal of Entomology, Vol 102, Iss 4, Pp 647-653 (2005)
The systemic effects of phytoecdysteroids were investigated by applying tested compounds to the roots of the rape plants. Evaluation of the effects was based on mortality, longevity, rate of development and fecundity of the cabbage aphid (Brevicoryne
Externí odkaz:
https://doaj.org/article/c7232e7e6a93482a9c860a7a3efea3bc
Autor:
Miloš Buděšínský, Jan Šmidrkal, Juraj Harmatha, Zdeněk Zídek, Vladimír Filip, Karel Vokáč, Roman Merkl, Eva Kmoníčková
Publikováno v:
Collection of Czechoslovak Chemical Communications. 75:175-186
Resveratrol and closely related stilbenoids belong to the most intensively studied biologically active compounds. This interest evoked several attempts to prepare such compounds in a convenient synthetic way. Our approach allowed obtaining largely me
Publikováno v:
European Journal of Pharmacology. 588:85-92
Thapsigargin is a sesquiterpene lactone of guaianolide type isolated from the Mediterranean plant Thapsia garganica L. It is widely used experimentally as a potent and selective inhibitor of sarco-endoplasmic reticulum Ca2+-ATPase (SERCA) leading to
Publikováno v:
Steroids. 73:502-514
Seventeen additional minor ecdysteroid compounds were isolated and identified from the roots of Leuzea carthamoides (Wild.) DC. Eight of them are new phytoecdysteroids: carthamoleusterone (13) is a new side-chain cyclo-ether with five-membered ring;
Publikováno v:
Steroids. 73:466-471
Effects of selected common phytoecdysteroids on immunobiological responses triggered by lipopolysaccharide and interferon-γ (IFN-γ) were tested under in vitro conditions using murine resident peritoneal macrophages. Namely, production of nitric oxi
Publikováno v:
Collection of Czechoslovak Chemical Communications. 72:334-346
Two lignan glucosides, the known tracheloside and the new carthamoside, together with their two known aglycones, trachelogenin and (7E,8'S)-7,8-didehydroarctigenin (cf. cartha- mogenin), were isolated from the seeds of Leuzea carthamoides. Additional
Publikováno v:
Fitoterapia. 107
Our previous research on immunostimulatory properties of trilobolide and its structurally related natural analogues isolated from Laser trilobum (L.) Borkh., encouraged us to investigate structurally related guaianolides belonging to a specific group
Publikováno v:
Collection of Czechoslovak Chemical Communications. 71:1229-1238
Three structurally related specific ecdysteroid derivatives, 7,7'-dimers of 14-deoxy-8(14)-ene transformed 20-hydroxyecdysone, ponasterone A and ajugasterone C, were obtained by photochemical transformation. The structures of the dimeric ecdysteroids
Publikováno v:
European Journal of Entomology, Vol 102, Iss 4, Pp 647-653 (2005)
The systemic effects of phytoecdysteroids were investigated by applying tested compounds to the roots of the rape plants. Evaluation of the effects was based on mortality, longevity, rate of development and fecundity of the cabbage aphid (Brevicoryne
Autor:
Karel Vokáč, Pavel Tlustoš, Daniela Pavlíková, Milan Pavlík, Soňa Vašíčková, Jiřina Száková, Jiří Balík
Publikováno v:
Analytical and Bioanalytical Chemistry. 381:863-872
This work investigates how the amounts of some important substances in a plant, and their behaviour inside the plant, depend on the levels of stress placed on the plant. To this end, model plant spinach (Spinacia oleracea L.) was cultivated on soil t