Národní úložiště šedé literatury Nalezeno 3 záznamů.  Hledání trvalo 0.02 vteřin. 
Analysis of lipids mobilized by adipokinetic hormones in the firebug Pyrrhocoris apterur (Heteroptera: Pyrrhocoridae)
BÁRTŮ, Iva
An effect of two adipokinetic hormones (Pyrap-AKH and Peram-CAH-II) on distribution of diacylglycerol (DG) molecular species and their fatty acid (FA) constituents were investigated by liquid chromatography (HPLC) - electrospray ionization mass spectrometry (ESI-MS) in haemolymph of the firebug Pyrrhocoris apterus. The results show that DGs with characteristic FAs are preferentially mobilized from fat body (FB) by the action of both AKHs produced by P. apterus. Both the macropterous and brachypterous morphs show very close DG and FA profiles. A separate action of the Pyrap-AKH and the Peram-CAH-II, however, exerts distinct differences in FA distribution at the macropterous morph. It seems that partially C16 and mainly unsaturated C18 FAs play a dominant role in the AKH action with an exclusive position of linoleic acid (18:2) which represents 50 - 60% of the total DG mobilization. The metabolically active C16 and C18 FAs are preferentially absorbed from the linden seeds and accumulated in the FB.
In vitro Incubation of the Labial Gland and Fat Body of the Bumblebee Males Bombus terrestris with [1,2-14C]acetate and Analysis of the Metabolites
Žáček, Petr ; Tykva, Richard ; Kindl, Jiří ; Valterová, Irena
Labial glands and fat bodies of the bumblebee males species Bombus terrestris were incubated in the medium with sodium [1,2-14]acetate and [1,2-14]acetate addition. Metabolites of the accetate substrate were identified by means of localization of beta emission from compounds containing 14C in their structure on thin layer chromatography plates with non destructive position sensitive radio detector and comprehensive two dimensional gas chromatography (GCxGC-MS). It was found that radioactive [1,2-14]acetate incorporated into various kind of compounds such as terpenoids, fatty acids, hydrocarbons and triacylgylcerols.
Dvoudimenzionální chromatografie jako nástroj pro studium biosyntézy komponent samčího značkovacího feromonu čmeláků druhů Bombus lucorum a Bombus lapidarius
Žáček, Petr ; Luxová, Anna ; Kindl, Jiří ; Valterová, Irena
Tato práce se zabývá identifikací deuterovaných metabolitů, vzniklých v těle čmeláka z deuterovaných mastných kyselin, metodou dvourozměrné plynové chromatografie s hmotnostní detekcí.

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