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  • 1
    Electronic Resource
    Electronic Resource
    Temperaturmessungen an geschichteten biologischen Geweben bei Frequenzen vonv=2,7×107 Hz bisv=1,2×109 Hz (1936)
    Springer
    Naturwissenschaften 24 (1936), S. 520-521 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01473819
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  • 2
    Electronic Resource
    Electronic Resource
    Seasonal variations in the stable isotopic composition and the skeletal density pattern of the coralPorites lobata (Gulf of Eilat, Red Sea) (1992)
    Springer
    Marine biology 112 (1992), S. 259-263 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The stable carbon and oxygen isotopic compositions of the massive coralPorites lobata collected from the Gulf of Eilat, Red Sea, in May 1987 were measured along the vertical growth axis. The isotopic compositions show annual periodicity. The variations along the isotopic profile, compared with the X-radiography, indicate that the high-density bands are enriched in18O and deposited during the season of lowest water temperature (winter). In contrast, the low-density bands are depleted in18O and deposited during the warmest seawater temperatures (summer). The stable carbon and the oxygen isotopic ratios are negatively correlated with a shift in phase. During the season of higher water temperatures and light intensity values (summer), the skeleton is depleted in18O and enriched in13C and vice versa for the winter time. The shift between the carbon and the oxygen isotopic curves reflects the shift between the seasonal light intensities and seasonal temperature variations in the shallow water. The oxygen isotope ratio was used to detect the seasonal variations in seawater temperatures. The coral aragonitic skeleton is depleted in18O compared to apparent equilibrium with ambient seawater. The disequilibria range from (ca.) -3.10‰ to -3.50‰ with an average value of 3.40‰. The isotope fractionation behavior during skeleton precipitation is discussed in light of the environmental variables.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702470
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  • 3
    Electronic Resource
    Electronic Resource
    Temperaturverteilung in geschichteten biologischen Geweben nach der Behandlung im elektromagnetischen Strahlenfeld mit Luft als Außenmedium (1938)
    Springer
    Naturwissenschaften 26 (1938), S. 477-478 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01774173
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  • 4
    Electronic Resource
    Electronic Resource
    Temperaturverteilung in geschichteten biologischen Geweben nach der Behandlung im elektromagnetischen Strahlenfeld mit Außenmedium hoher Dielektrizitätskonstante (1938)
    Springer
    Naturwissenschaften 26 (1938), S. 478-479 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01774174
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  • 5
    Electronic Resource
    Electronic Resource
    Correlation of stable oxygen isotope temperature record with light attenuation profiles in reef-dwellingTridacna shells (1991)
    Springer
    Coral reefs 10 (1991), S. 65-69 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Molluscs are known to record environmental changes in their carbonate shells in detail. This paper reports the findings of a high-resolution analysis of stable oxygen isotopic compositions and light transmission properties of a shell of the reef-dwelling Pacific giant clamTridacna gigas. Our findings reveal that the annual growth rates and the longevity ofTridacna specimens can be readily determined by measuring the annual light attenuation pattern within the shell. Annual seasonal changes in water temperature are reflected with high resolution in the stable oxygen isotope ratios and in the light attenuation values of the aragonite shell. The inner shell ofT. gigas deposited below the pallial line revealing undisturbed shell accretion with high growth rates shows the maximum seasonal oxygen isotope range and the highest resolution in light attenuation changes. We suggest that this is the best part of the shell to reconstruct former seasonal surface water temperatures in tropical environments. Scanning electron microscopy (SEM) studies suggest that the annual growth patterns observed in transmitted light are generated by a complex pattern of daily growth increments with varying sizes of skeletal crystallites and varying amounts of organic carbon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00571825
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  • 6
    Electronic Resource
    Electronic Resource
    A 200-year coral stable oxygen isotope record from a high-latitude reef off Western Australia (1999)
    Springer
    Coral reefs 18 (1999), S. 1-12 
    Details
    ISSN: 1432-0975
    Keywords: Key words Coral stable isotopes ; Leeuwin current ; Australia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract  A core from a coral colony of Porites lutea was analysed for stable oxygen isotopic composition*. A 200-year proxy record of sea surface temperatures from the Houtman Abrolhos Islands off west Australia was obtained from coral δ18O. At 29′S, the Houtman Abrolhos are the southernmost major reef complex of the Indian Ocean. They are located on the path of the Leeuwin Current, a southward flow of warm, tropical water, which is coupled to Indonesian throughflow. Coral δ18O primarily reflects local oceanographic and climatic variability, which is largely determined by spatial variability of the Leeuwin Current. However, coherence between coral δ18O and the current strength itself is relatively weak. Evolutionary spectral and singular spectrum analyses of coral δ18O demonstrate a high variability in spectral composition through time. Oscillations in the 5–7-y, 14–15-y, and quasi-biennial bands reflect teleconnections of local sea surface temperature (SST) to tropical Pacific climate variability. Deviations between local (coral-based) and regional (instrument) SST contain a cyclic component with a period of 15 y. Coral δ18O suggests a rise in SST by 0.6 ′C since AD 1944, consistent with available instrumental SST records. A long-term warming by 1.4 ′C since AD 1795 is inferred from the coral record.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003380050147
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  • 7
    Electronic Resource
    Electronic Resource
    Growth rhythms recorded in stable isotopes and density bands in the reef coral Porites lobata (Cebu, Philippines) (1984)
    Springer
    Coral reefs 3 (1984), S. 87-90 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Growth rhythms in the reef coral Porites lobata are revealed by X-radiography and stable carbon and oxygen isotopic analysis. High density increments were deposited during warm temperatures in summer and low density increments during winter. The seasonal temperature variations are reflected in the oxygen isotope ratios. The coral carbonate shows a constant depletion in 18O of −2.7%0 relative to calcite in equilibrium with the ambient seawater. The mean annual growth rate of the specimen studied was 1.3±0.3 cm/year.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263758
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  • 8
    Electronic Resource
    Electronic Resource
    Climatic changes during the last deglaciation recorded in sediment cores from the northeastern Brazilian Continental Margin (1999)
    Springer
    Geo-marine letters 19 (1999), S. 209-218 
    Details
    ISSN: 1432-1157
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Detailed 14C AMS data and isotope based stratigraphies from high-resolution paleoceanographic records for the last 22 ka of cores from the upper continental slope off NE Brazil reveal sedimentation rates of up to 100 cm per 1000 yr. Variations in the sediment composition relate to changes in the input of terrigenous material. The sedimentation is controlled by sea level and by the climatic regime of the hinterland. Short-term changes in the tropical wind field may act as a climatic trigger. The zonality of the SE trades was probably increased and the monsoonal activity over Africa reduced during the Younger Dryas period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003670050111
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  • 9
    Electronic Resource
    Electronic Resource
    Serumkonzentrationen und Kinetik nach Kurzinfusion von vier Gramm Cefazolin (1977)
    Springer
    Infection 5 (1977), S. 228-231 
    Details
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The pharmacokinetics of cefazolin were studied in 25 males and females after administration of 4 g infused over 60 minutes. The mean microbiologically active concentration of cefazolin in serum five minutes after discontinuing the infusion was 410 µg/ml, after 60 minutes 190 µg/ml and after 8 hours 8.5 µg/ml. After 8 hours 84% of the drug was eliminated in the urine of four of the volunteers. The mean serum half-life was 87.38 minutes in the one compartment model, and the volume of distribution 9.20 1. The area under the curve was 44626.15 µg · min · ml−1. The mean value for the clearance was 73.5 ml/min. The importance of high dosages of cefazolin in severe infections caused by cefazolin-sensitive organisms is discussed. Side-effects were not observed.
    Notes: Zusammenfassung An 25 freiwilligen Versuchspersonen beiderlei Geschlechts wurde das pharmakokinetische Verhalten von Cefazolin bei einer Dosierung von 4 g i.v. als Kurzinfusion über 60 Minuten untersucht. Die biologisch aktiven Serumkonzentrationen betrugen 5 Minuten nach Beendigung der Infusionen durchschnittlich 410 µg/ml, nach 60 Minuten 190 µg/ml und nach 8 Stunden durchschnittlich 8,5 µg/ml. Bei vier Versuchspersonen waren nach 8 Stunden rund 84% der Substanz im Harn eliminiert. Die durchschnittliche Serumhalbwertszeit beträgt nach dem Ein-Kompartimentmodell 87,38 Minuten. Das Gesamtverteilungsvolumen beträgt im Mittel 9,20 1. Die Fläche unter der Kurve beträgt 44626,15 µg · min · ml−1. Die Clearance beträgt rund 73,5 ml/min. Die Bedeutung der Hochdosistherapie mit 4 g Cefazolin i.v. für schwere durch cefazolinempfindliche Erreger verursachte Infektionen wird diskutiert. Nebenwirkungen wurden nicht beobachtet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01640786
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  • 10
    Electronic Resource
    Electronic Resource
    Search for a bound trineutron with the 3He(π−pgr;+)nnn reaction (1999)
    Springer
    The European physical journal 4 (1999), S. 5-7 
    Details
    ISSN: 1434-601X
    Keywords: PACS:21.45.+v Few-body systems – 25.10.+s Nuclear reactions involving few-nucleon systems – 25.80.Gn Pion charge-exchange reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. A search for the production of a bound trineutron state has been performed using the reaction 3He(π−,π+)nnn at incident pion energies of 65, 75, and 120 MeV. No evidence for the existence of the 3n was found, and an upper limit for the production cross section of approximately 30 nb/sr (2σ confidence level) was obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500050196
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