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  • 1
    Electronic Resource
    Electronic Resource
    Retrograde mineral reactions: a heat source in the continental crust? (1996)
    Springer
    Geologische Rundschau 85 (1996), S. 130-137 
    Details
    ISSN: 0016-7835
    Keywords: Key words Water/rock reactions ; Exothermic reactions ; Retrograde metamorphism ; Heat source ; Heat flow ; Hydrothermal systems ; Mineralisation ; KTB
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Chemical reactions of water with silicates are strongly exothermic. Therefeore, retrograde metamorphism is also a strongly exothermic process and thus a potentially powerful heat source. Depending on the time scale its contribution to the terrestrial heat flow can be equivalent to, or even exceed, that of radioactive decay. During hydration mafic rocks and gneisses liberate 60 J/cm3 for each weight percent H2O they bind. It is argued that retrograde reactions constitute relatively short-lived, single or repeated episodes during crustal cooling, and that they can influence, or even strongly perturb, the geotherm during thousands to a million years. The thermal effects involved are non-trivial; they should be considered in interpretations of heat flow measurements. They could constitute the main heat source for hydrothermal mineralisations not connected with magmatic intrusions and possibly contribute to the thermal development of sedimentary basins. These effects are large enough to be one of the possible explanations for the difference between the predicted and measured heat flows at the KTB site.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192071
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  • 2
    Electronic Resource
    Electronic Resource
    Retrograde mineral reactions: a heat source in the continental crust? (1996)
    Springer
    International journal of earth sciences 85 (1996), S. 130-137 
    Details
    ISSN: 1437-3262
    Keywords: Water/rock reactions ; Exothermic reactions ; Retrograde metamorphism ; Heat source Heat flow ; Hydrothermal systems ; Mineralisation ; KTB
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Chemical reactions of water with silicates are strongly exothermic. Therefeore, retrograde metamorphism is also a strongly exothermic process and thus a potentially powerful heat source. Depending on the time scale its contribution to the terrestrial heat flow can be equivalent to, or even exceed, that of radioactive decay. During hydration mafic rocks and gneisses liberate 60 J/cm3 for each weight percent H2O they bind. It is argued that retrograde reactions constitute relatively short-lived, single or repeated episodes during crustal cooling, and that they can influence, or even strongly perturb, the geotherm during thousands to a million years. The thermal effects involved are non-trivial; they should be considered in interpretations of heat flow measurements. They could constitute the main heat source for hydrothermal mineralisations not connected with magmatic intrusions and possibly contribute to the thermal development of sedimentary basins. These effects are large enough to be one of the possible explanations for the difference between the predicted and measured heat flows at the KTB site.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192071
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  • 3
    Electronic Resource
    Electronic Resource
    Determination of Functional Groups on Polymer Surfaces Using FluorescenceLabelling (1996)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 24 (1996), S. 257-262 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The technique of fluorescence labelling has been applied for the determination of functional groups on plasma and chromic acid-modified polymer surfaces. Various fluorescence dyes were coupled to carboxyl, carbonyl, hydroxyl and amino groups. It was found that fluorescence labelling is a very sensitive tool for quantitative determination of the surface chemical structure of polymers.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Thermoanalytische Untersuchungen zum thermooxidativen Verhalten und zur Stabilisierbarkeit von Blockcopolyetherestern (1979)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 30 (1979), S. 199-203 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The thermooxydative stability of block copolyetheresters of ethylene and butylene terephthalate with polyethyleneoxide diol with and without addition of antioxydants was investigated by DTA and TG under anisothermic and isothermic conditions. The differences in the temperatures of the beginning and the intensity of an exotherm enthalpy effect as well as the differences in weight loss allow to estimate the stabilizing effect. Comparative investigations on the long time thermal stability resulted in equal values for the decrease in strength of shaped bodies and the induction period in thermoanalytic measurements.
    Notes: Die thermooxidative Stabilität von Blockcopolyetherestern des Ethylen-bzw. Butylenterphthalates mit Polyethylenoxiddiol mit und ohne Zusatz von Antioxidantien wurde durch DTA und TG unter anisothermen und isothermen Bedingungen untersucht. Die Unterschiede in der Temperatur des Beginns und in der Intensität eines exothermen Enthalpieeffektes sowie der unterschiedliche Masseverlust ermöglichen eine Beurteilung der Stabilisatorwirksamkeit. Vergleichende Untersuchungen zur Dauerwärmebeständigkeit ergaben für die Festigkeitsabnahme von Formkörpern und die Induktionsperiode bei thermoanalytischen Messungen übereinstimmende Werte.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1979.010300403
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  • 5
    Electronic Resource
    Electronic Resource
    High cytotoxicity and membrane permeability of Et3Pb+ in mammalian and plant cells (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Cell Biochemistry and Function 2 (1984), S. 213-216 
    Details
    ISSN: 0263-6484
    Keywords: Lead ; triethyllead ; neuroblastoma cells ; soybean cells ; tubulin ; microtubules ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Cells of mammalian origin as well as those of higher plants appear to be very sensitive to triethyllead ion (Et3Pb+). Neuroblastoma cells kept in the presence of 1 μM Et3Pb+ lost their viability within 6 h. Growth of suspension culture cells of soybean (G. max(L.)Merr.) was inhibited by 1 μM Et3Pb+, and finally the cells died. Morphologically, Et3Pb+ caused the complete breakdown of microtubular structures in neuroblastoma cells; thus microtubules appeared to be the main target for the toxin. While in a previous study the effect of Et3Pb+ on microtubules has been well documented at concentrations of 50-200 μM1, the present study demonstrates that the formation of microtubules from pig brain tubulin is disturbed at concentrations of Et3Pb+ as low as 0.5 to 1 μM. We conclude from these data that Et3Pb+ freely permeates the plasma membranes of mammalian as well as plant cells.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cbf.290020406
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  • 6
    Electronic Resource
    Electronic Resource
    Zur Bestimmung der durch thermischen Abbau aus Poly(vinylalkohol) abgespaltenen Wassermenge (1987)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 38 (1987), S. 155-156 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1987.010380215
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Kinetik des thermischen Abbaus von PVC. I. Untersuchungen zum Gehalt an Defektstrukturen und zu ihrem Einfluß auf die ThermostabilitätHerrn Professor Dr. Dr. h. c. Hermann Klare zum 75. Geburtstag gewidmet (1984)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 35 (1984), S. 344-349 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: As a prerequisite for investigations on thermal stability of PVC the content of isolated and conjugated double bonds as well as keto chloroallylic groups were evaluated. The influence of this anomalous structures in PVC on stability was investigated by isothermal and non-isothermal measurements of the rate of dehydrochlorination. The results indicate that only keto chloroallylic groups cause an effective increase of the rate of initiation.
    Notes: Als wesentliche Voraussetzung für Untersuchungen zur thermischen Stabilität von PVC wurde der Gehalt an isolierten und konjugierten Doppelbindungen sowie Ketochlorallylgruppen quantitativ bestimmt. Die Beurteilung des Einflusses dieser Defektstrukturen der Polymerkette erfolgte durch Messung des Dehydrochlorierungsverlaufes unter isothermen und nichtisothermen Bedingungen. Die Ergebnisse zeigen, daß lediglich Ketochlorallylgruppen effektiv eine erhöhte Initiierungsgeschwindigkeit bewirken.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1984.010350502
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  • 8
    Electronic Resource
    Electronic Resource
    Zur Identifizierung von Verunreinigungen im Poly(butylenterephthalat) (1988)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 39 (1988), S. 661-662 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1988.010391115
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  • 9
    Electronic Resource
    Electronic Resource
    Developments in polymer degradation 6. Hg. von N. GRASSIE. ISBN 0-85334-337-3. London/New York: Elsevier Appleid Sciecne Publishers Ltd. 1985. X, 265 S., geb., £ 30.00 (1986)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 37 (1986), S. 660-660 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1986.010371018
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  • 10
    Electronic Resource
    Electronic Resource
    Topokinetics of the polyene formation in PVC films during treatment with non-oxidative plasma (1991)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 42 (1991), S. 51-52 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1991.010420117
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