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	Optimization of a Flow Rate for a Hyphenation of Voltammetry with Electrospray Ionization Mass Spectrometry Jaklová Dytrtová, Jana ; Jakl, M. ; Norková, Renáta ; Navrátil, Tomáš The hyphenation of an electrochemical cell prior to mass spectrometer with electrospray ionization allows studying of products and/or of intermediates of electrode reactions. The measurement is realized in a flowing system. The flow rate of the sample markedly influences the MS signal intensity of the product. The calculated optimum value for the electrochemical cell with the sweep volume 0.72 μL is in the range from 0.4 to 0.5 mL h -1 . The experimental optimal value is 0.45 mL h -1 . The optimization of the flow rate has to be provided individually for each product, because the intensity also depends on the rate of the electrode reaction and product stability. Úplný záznam
	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. Úplný záznam
	Electrochemistry with Mass spectrometry as a Tool of Metal Complexes with Organic Ligand Studies Jaklová Dytrtová, Jana ; Jakl, M. ; Schröder, Detlef Electrochemical and mass spectrometric approaches for the detection of metals species with organic ligands are compared. Advantages of the connection of electrochemistry with mass spectrometry are discussed. Úplný záznam

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