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  • 1
    Electronic Resource
    Electronic Resource
    Proton NMR relaxation studies on several nitroxyl-water systems (1978)
    Springer
    Journal of solution chemistry 7 (1978), S. 197-204 
    Details
    ISSN: 1572-8927
    Keywords: 1-H NMR relaxation ; nitroxyl radicals ; aqueous solution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Proton spin-lattice and spin-spin relaxation times of several nitroxyl radicals in aqueous solutions have been measured between 10 kHz and 90 MHz. There are two regions where the relaxation times of the solvent water protons are frequency dependent. It is possible to extract from these experimental data structural and dynamical parameters such as the number of solvated water protons and/or their mean lifetime in the first hydration sphere around the paramagnetic center. These results were found to differ considerably from corresponding data reported in the literature which have been deduced mainly from chemical shift measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650527
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Seasonal changes of cold resistance of Proteaceae of the South Chilean laurel forest (1983)
    Springer
    Plant ecology 52 (1983), S. 35-44 
    Details
    ISSN: 1573-5052
    Keywords: Cold-resistance ; Laurel forest ; Proteaceae ; Rain forest ; South Chile
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Seasonal changes in cold-resistance in five Proteaceae: Gevuina avellana, Lomatia hirsuta, Lomatia dentata, Lomatia ferruginea and Embothrium coccineum were studied in the Botanical Garden, Universidad Austral de Chile in Valdivia, Chile. All species presented such changes in relation to the minimum air temperatures but not in relation to rainfall. Cold-resistance increased together with the temperature decrease from March to May. Maximum resistance was observed in winter (June to August). The spring temperature increase caused a decrease of cold-resistance, which reached its maximum from spring (November) to summer (December to February). The results obtained for cold-resistance correspond to the weather conditions found in natural biotopes of the species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00040015
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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