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  • 1
    Electronic Resource
    Electronic Resource
    Thermodynamic quantities for the interaction of H+ and Na+ with C2H3O 2 − and Cl− in aqueous solution from 275 to 320°C (1988)
    Springer
    Journal of solution chemistry 17 (1988), S. 865-885 
    Details
    ISSN: 1572-8927
    Keywords: Equilibrium constant ; enthalpy change ; entropy change ; heat capacity change ; capacity change ; flow calorimetry ; high temperature ; hydrochloric acid ; acetic acid ; sodium acetate ; isocoulombic reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The aqueous reactions, {ie865-1} were studied as a function of ionic strength at 275, 300, and 320°C using a flow calorimetric technique. Log K, ΔH and ΔS values were determined from the fits of the calculated and experimental heats while ΔCp values were calculated from the variation of ΔH values with temperature. The log K and ΔH values for the first two reactions agree well with literature values at these temperatures. No previous results have been reported for the third reaction. The use of equations containing identical numbers of positive and identical numbers of negative charges on both sides of the equal sign (isocoulombic reaction principle) was applied to the log K values determined in this study. The resulting plots of log K for the isocoulombic reactions vs. I/T were approximately linear, which demonstrates that the ΔCp values for these reactions are approximately zero.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00646554
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  • 2
    Electronic Resource
    Electronic Resource
    Thermodynamic quantities for the interaction of SO 4 2− with H+ and Na+ in aqueous solution from 150 to 320°C (1988)
    Springer
    Journal of solution chemistry 17 (1988), S. 841-863 
    Details
    ISSN: 1572-8927
    Keywords: Equilibrium constant ; enthalpy change ; entropy change ; heat ; capacity change ; flow calorimetry ; high temperature ; hydrogen sulfate ion and sodium sulfate ion formation ; isocoulombic effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The aqueous reactions, $$\begin{gathered} H^ + + SO_4^{2 - } = HSO_4^ - ,Na^ + + SO_4^{2 - } = NaSO_1^ - , \hfill \\ and H^ + + HSO_4^ - = H_2 SO_4 (aq) \hfill \\ \end{gathered} $$ were studied as a function of ionic strength(I) at 150, 175, 200, 250, 300 and 320°C using a flow calorimetric procedure. Log K, ΔH, ΔS and ΔC p values at I=0 were derived from the data at each temperature. Using these experimental values, equations describing log K, ΔH, ΔS and ΔC p at I=0 and temperatures from 150 to 320°C were derived for each system. The use of equations containing identical numbers of positive and identical numbers of negative charges on both sides of the equal sign (isocoulombic reaction principle) was evaluated as a technique for the extrapolation of log K values valid below 100°C to temperatures above 150°C. This evaluation indicated that the principle gives good estimates up to 320°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00646553
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  • 3
    Electronic Resource
    Electronic Resource
    Fractionation, hybridisation and magma-mixing in the Kialineq centre East Greenland (1986)
    Springer
    Contributions to mineralogy and petrology 92 (1986), S. 57-70 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The igneous rocks of the Kialineq centre on the coast of East Greenland at 67°N include a number of quartz syenite and granite plutons intruded 35my BP. These are subvolcanic bodies emplaced by cauldron subsidence and with ring-dike and bell-jar form. Associated with the major intrusions is an extensive acid-basic mixed magma complex. Two-liquid structures, chilling of basic against acid magma, pillows of basic in acid, and net-veining of basic by acid magma, are superbly displayed. The basic magma was of a transitional or alkaline type and underwent varying degrees of fractionation in a regime of repeated intrusions and diverse chambers. Heterogeneous hybrid rocks intermediate between basalt and quartz syenite are strongly developed and were formed by repeated mechanical mixing of contrasting magmas. The energy for this mixing probably came in the main from cauldron-block subsidence. The quartz syenite magma, which itself fractionated towards granite, has initial 87Sr/86Sr ratios the same as the basic magma and is itself believed to be a fractionation product of alkali basalt magma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00373963
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  • 4
    Electronic Resource
    Electronic Resource
    Mathematical modelling of hydration of cement: Hydration of dicalcium silicate (1987)
    Springer
    Materials and structures 20 (1987), S. 377-382 
    Details
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract The hydration stoichiometry, products and kinetics of dicalcium silicate are summarized. Hydration takes a similar course to tricalcium silicate, but at a much slower rate. The differences and similarities between the two compounds are identified and discussed, and future research needs identified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02472586
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  • 5
    Electronic Resource
    Electronic Resource
    Cloning and characterization of aBoLA class I cDNA clone (1989)
    Springer
    Immunogenetics 29 (1989), S. 58-60 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02341615
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  • 6
    Electronic Resource
    Electronic Resource
    An investigation into the role of 5-Azacytidine in tissue culture (1989)
    Springer
    Theoretical and applied genetics 78 (1989), S. 321-328 
    Details
    ISSN: 1432-2242
    Keywords: Gene methylation ; Tissue culture ; 5-Azacytidine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A major problem associated with cereal biotechnology remains the extreme difficulty of reliably and efficiently regenerating plants from protoplasts. Because of the assumed inverse correlation between levels of the modified nucleotide 5-methylcytosine in a gene and the degree of transcription, we report here on experiments to determine whether exposure of maize and tobacco cultures to the 5-methylcytosine analogue 5-Azacytidine (5-Azt) induces gene de-methylation and, as such, enhances tissue culture response, for example by increasing protoplast division frequency. The results show that whilst 5-Azt may be of use in expanding leaf areas capable of producing callus as well as increasing the amount of callus produced, in all other aspects 5-Azt is strongly inhibitory to growth at all but the lowest concentrations. Molecular analysis shows that no readily discernible changes in gene methylation status can be found, regardless of 5-Azt concentration or the gene probe used. Differences can, however, be found in methylation status between callus and developmentally determined tissues, irrespective of 5-Azt treatment. The results suggest that, apart from a very limited role, 5-Azt has no obvious use in tissue culture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265291
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  • 7
    Electronic Resource
    Electronic Resource
    Determination of cyanogen and cyanogen chloride using gas chromatography with a flame ionisation detector (1986)
    Springer
    Chromatographia 21 (1986), S. 161-164 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Flame ionisation detection ; Cyanogen ; Cyanogen chloride
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The response of a flame ionisation detector (FID) to cyanogen ((CN)2) and cyanogen chloride (CNCI) has been studied. The lower limits of detection for (CN)2 and CNCl were 6×10−12 moles and 2×10−11 moles respectively. In a comparative study a thermal conductivity detector gave as its lower limit of detection for both (CN)2 and CNCl 4×10−11 moles. Both detectors showed excellent linearity over the range 0 to 10 micromoles. The ratio of the gradients of the FID calibrations (CN)2/CNCI were found to be approximately two suggesting the response depended on the cyanide group. The response and stability of the FID was investigated as a function of air and hydrogen flow-rates. The response increased with increasing air flow-rate for both (CN)2 and CNCI up to 300cm3min−1, thereafter no significant increase was observed. On raising the hydrogen flow from 10 to 25cm3min−1 only a slight increase in the sensitivity of the FID towards both (CN)2 and CNCI was observed. At higher flow rates the response for (CN)2 increased markedly whereas at the same flow rates the response for CNCI increased only slightly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311746
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  • 8
    Electronic Resource
    Electronic Resource
    Inheritance of tolerance to barley yellow dwarf virus in oats (1985)
    Springer
    Euphytica 34 (1985), S. 681-687 
    Details
    ISSN: 1573-5060
    Keywords: Avena sativa ; oats ; barley yellow dwarf virus ; international screening ; quantitative inheritance ; single seed descent ; Rhopatosiphum padi ; virullferous aphids ; transgressive segregation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Advanced generation random lines from crosses of tolerant x susceptible parents were studied to determine the inheritance of tolerance to barley yellow dwarf virus (BYDV) in oats Avena sativa L. Clintland 64, a susceptible oat cultivar, was crossed with the BYDV tolerant oat lines Otee, FF64/74, M921 and CI4492. Randomly selected lines were advanced to F5 or F6 by single seed descent and were tested for their reaction to BYDV at Palmerston North, New Zealand and Winnipeg, Manitoba and Ste-Foy, Quebec, Canada. The reactions of the lines to BYDV infection from each cross at the three test sites fall into a relatively continuous distribution. Two to four quantitatively inherited genes appear to contribute to the tolerance of the four tolerant oats. At Palmerston North, Clintland 64 expressed some tolerance to the virus. The correlation between the three sites was significant (P=0.01) for all crosses, ranging from 0.36 to 0.69, according to the particular cross considered. This correlation is sufficient to justify more international testing of oats for BYDV tolerance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00035404
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  • 9
    Electronic Resource
    Electronic Resource
    A polarised neutron scattering study of magnetic fluctuations in the heavy fermion superconductor CeCu2Si2 (1985)
    Springer
    The European physical journal 59 (1985), S. 401-406 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Magnetic fluctuations in CeCu2Si2 were directly observed, both above the superconducting transition temperatureT C as well as below. Spatial correlations of the magnetisation density belowT C are weak, resulting in an essentially wavevector independent magnetic response. The intensity observed within an energy window of ±5 THz centred on ω=0 THz corresponds to 1µ β per Ce atom. Higher energy excitations peaking between 7–10 THz were observed and are probably due to higher crystal field levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01328848
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  • 10
    Electronic Resource
    Electronic Resource
    Direct observation of magnetic fluctuations in UPt3 both above and below the superconducting transition temperature (1986)
    Springer
    The European physical journal 63 (1986), S. 335-341 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Polarised neutrons and polarisation analysis were used in a neutron scattering study of UPt3 both above the superconducting transition temperatureT c as well as below. Thus the existence of magnetic fluctuations in UPt3 was established unambiguously. For varyingQ vectors the magnetic scattering intensity was integrated over energy transfers ±20 meV to obtain a measure of the corresponding magnetic correlation function. No indication for strong spatial correlations of magnetisation could be detected. Furthermore inelastic transitions up to energy transfers of 80 meV were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01303813
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