Authors:C. M. Kramer, Z. A. Munir and J. V. Volponi
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.
Authors:S. Landsberger, A. Simsons, J. Kramer, J. Drake, S. Vermette, B. Shuter and P. Ihssen
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).
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
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
, STS638, SCS73
, IPY10 and Lr29F24/R24, cslVrgal3, PS10R/L, respectively. Evaluation of the repeatability and the reliability of selected markers (pTAG621 for
, STS683 for
, D14L for
, Lr25F20/R19 for
, Lr29F24/R24, IPY10 for
, cslVrgal3 for
and PS10R/L for
) 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
, D14L for gene
, Lr25F20/R19 for gene
were found to be unsuitable for effective screening of large segregating populations in breeding programs.