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  • 550 - Earth sciences
  • Humans
  • SPACE SCIENCES
  • Springer  (3)
  • Deutsche Meteorologische Gesellschaft (DMG) ; Geoforschungszentrum Potsdam  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular evolution 35 (1992), S. 7-16 
    ISSN: 1432-1432
    Keywords: Alu source genes ; Humans ; Gorillas ; Retrotransposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A member of the young PV Alu sub-family is detected in chimpanzee DNA showing that the PV subfamily is not specific to human DNA. This particular Alu is absent from the orthologous loci in both human and gorilla DNAs, indicating that PV subfamily members transposed within the chimpanzee lineage following the divergence of chimpanzee from both gorilla and human. These findings and previous reports describing the transpositional activity of other Alu sequences within the human, gorilla, and chimpanzee lineages provide phylogenetic evidence for the existence of multiple Alu source genes. Sequences surrounding this particular Alu resemble known transcriptional control elements associated with RNA polymerase III, suggesting a mechanism by which cis-acting elements might be acquired upon retrotransposition.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 124 (1993), S. 73-77 
    ISSN: 1573-0832
    Keywords: Assessment ; Cancer ; Humans ; Hydrazines ; Mushroom
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract This assessment focuses on the concentrations of some chemicals present in theAgaricus bisporus mushroom, the cancer-inducing doses of these chemicals or mushroom used in the animal experiments, the total amounts of these chemicals or mushroom needed to induce cancer in these mice, and the estimated total amounts of these chemicals or mushroom needed to induce cancer in humans. By adding the estimated amounts of chemicals needed to induce cancer and by comparing it with the amount of raw mushroom needed to induce the same effect, it becomes obvious that we have accounted for less than 2% of the carcinogenic components of theAgaricus bisporus mushroom. Since some unavailable data handicapped this assessment, it should be regarded as tentative and subject to further adjustment.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/book
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  • 4
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    Deutsche Meteorologische Gesellschaft (DMG) ; Geoforschungszentrum Potsdam
    Publication Date: 2020-02-12
    Description: Heute wird GPS (Global Positioning System) routinemäßig für die Positionsbestimmung genutzt. Aber es lässt sich noch mehr machen mit GPS: Wasserflächen reflektieren aufgrund ihrer Leitfähigkeit einen Teil der einfallenden GPS-Satellitensignale. Diese reflektierten Signale überlagern die einfallenden direkten GPS-Signale. Es kann zu einer Interferenz zwischen dem direkten und reflektierten GPS-Signal kommen, welche periodische Amplitudenschwankungen verursacht. Im Normalfall versucht man diese Signale zu unterdrücken, da diese eine genaue Positionsbestimmung verschlechtern. Am GFZ ist der spezielle OpenGPS Empfänger entwickelt worden, der diese Amplitudenschwankungen mit hoher zeitlicher Auflösung aufzeichnen kann. Aus den gemessenen Amplitudenschwankungen und der bekannten Position von GPS-Empfänger und GPS-Satellit können relative Höhenschwankungen der Wasseroberfläche am Ort der Reflexion abgeleitet werden und dies mit bis zu wenigen Zentimetern Genauigkeit. Die Methode der GPS-Reflektometrie bietet damit die Möglichkeit, im ufer- und küstennahen Bereich See- und Meeresspiegeländerungen, wichtige klimarelevante Faktoren, zu überwachen. Die Methode lässt sich aber nicht nur für bodengestützte Fernerkundung einsetzen, sondern befindet sich auch in der Entwicklung für eine weltraumgestützte globale Überwachung des Meeresspiegels.
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/other
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