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  • Author or Editor: J. Kramer x
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Six alkali metal nitrates and nitrites were evaporated in vacuum at a constant heating rate in a combined mass spectrometric and thermogravimetric apparatus. Time resolved profiles of decomposition gases and kinetics were obtained for LiNO3, NaNO3, KNO3, Na/KNO3, NaNO2 and KNO2. Activation energies for the evaporation of these salts were calculated and compared to previous results of isothermal experiments. In the temperature range 650–850 K, the decomposing nitrates released NO, N2 and O2 while the nitrites released only NO and N2.

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Journal of Radioanalytical and Nuclear Chemistry
Authors: S. Landsberger, A. Simsons, J. Kramer, J. Drake, S. Vermette, B. Shuter and P. Ihssen

Abstract  

Instrumental neutron activation analysis has been successfully employed in three distrinct acid precipitation studies. These include the determination of ten (Al, Br, Ca, Cl, Cu, I, Mg, Mn, Na and V) elements in urban rainfall, elevated aluminum concentrations in acidified lakes and major ions (Ca, Cl, K, Mg and Na) in small-mouth bass kept in controlled pH environments. Quality control was assured by analyzing two certified standard reference materials prepared by the National Bureau of Standards (NBS 1643a) and National Research Council of Canada (hepatopancreas TORT-1 marine biological tissue).

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Cereal Research Communications
Authors: L. Błaszczyk, I. Kramer, F. Ordon, J. Chełkowski, M. Tyrka, G. Vida and I. Karsai

The set of 44 near-isogenic lines of spring wheat cv. Thatcher and wheat genotypes known to carry specific leaf rust resistance genes were included in the present study for the preliminary validation of twelve STS and SCAR markers linked to leaf rust resistance genes Lr9, Lr19, Lr20, Lr21, Lr24, Lr25, Lr26, Lr28, Lr29, Lr37 . Seven Lr genes were specifically tagged by STS and SCAR markers. The presence of genes Lr9, Lr19, Lr20, Lr24, Lr28, Lr29, Lr37 in the tested plant materials was confirmed by a unique amplification of markers SCS5 550 , SCS265 512 and SCS253 736 , STS638, SCS73 719 , SCS421 570 , IPY10 and Lr29F24/R24, cslVrgal3, PS10R/L, respectively. Evaluation of the repeatability and the reliability of selected markers (pTAG621 for Lr1 , STS683 for Lr20 , D14L for Lr21 , Lr25F20/R19 for Lr25 , Lr29F24/R24, IPY10 for Lr29 , cslVrgal3 for Lr37 and PS10R/L for Lr47 ) across four European laboratories and PCR conditions demonstrated the usability of STS638, Lr29F24/R24, IPY10, cslVrgal3 and PS10R/L markers in marker-assisted selection. STS markers pTAG621 for gene Lr1 , D14L for gene Lr21 , Lr25F20/R19 for gene Lr25 were found to be unsuitable for effective screening of large segregating populations in breeding programs.

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