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All Library Books, journals and Electronic Records Telegrafenberg

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  • 2020-2022  (23)
  • 1990-1994  (46)
  • 1980-1984  (43)
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  • 1
    Electronic Resource
    Electronic Resource
    An upper limit to the global SO 2 abundance on Io (1980)
    [s.l.] : Nature Publishing Group
    Nature 285 (1980), S. 308-309 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Io was observed by the long-wavelength spectrograph of the IUE on 21 April 1979. The best Io spectrum is shown in Fig. 1, together with the solar spectrum of Broadfoot4. The sub-Earth longitude on Io increased from 80 to 90 during the period in which our best spectrum was obtained. The spectral ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/285308a0
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  • 2
    Electronic Resource
    Electronic Resource
    Spectra of SO 2 frost for application to emission observations of Io (1980)
    [s.l.] : Nature Publishing Group
    Nature 285 (1980), S. 211-213 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Although spectra of the Galilean satellites Europa, Ganymede and Callisto clearly indicate water ice absorption features representing free water in the form of surface frost1, no water ice features have been identified in reflection spectra of lo. Instead, it has been suggested2,3 that observed lo ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/285211a0
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  • 3
    Electronic Resource
    Electronic Resource
    The search for other planets: Clues from the solar system (1994)
    Springer
    Astrophysics and space science 212 (1994), S. 1-11 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Studies of element abundances and values of D/H in the atmospheres of the outer planets and Titan support a two-step model for the formation of these bodies. This model suggests that the dimensions of Uranus provide a good index for the sensitivity required to detect planets around other stars. The high proportion of N2 on the surfaces of Pluto and Triton indicates that this gas was the dominant reservoir of nitrogen in the early solar nebula. It should also be abundant on pristine comets. There is evidence that some of these comets may well have brought a large store of volatiles to the inner planets, while others were falling into the sun. In other systems, icy planetesimals falling into stars should reveal themselves through high values of D/H.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984503
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  • 4
    Electronic Resource
    Electronic Resource
    An ocean-bottom hydrophone recorder for seismic refraction experiments (1981)
    Springer
    Marine geophysical researches 5 (1981), S. 173-187 
    Details
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A new and inexpensive pop-up ocean-bottom hydrophone recorder has been developed for use in seismic refraction experiments. It is capable of operating in water depths of up to 4000 m and in very rugged topography, and uses an acoustic command system built by the U.K. Institute of Oceanographic Sciences for recovery. The instrument is mounted in an inexpensive cylindrical pressure case based on commercially available extruded aluminium alloy tubing, and uses glass spheres and syntactic foam for buoyancy. Hydrophone and clock signals are frequency modulated and recorded on tape cassettes, with a recording duration of three hours allowing up to 18 programmed shot windows. The prototype has made seven free descents on the Mid-Atlantic ridge and in the Gulf of Oman, and successfully recorded shots under operational conditions for the first time in September 1979. The total component cost of the prototype was £2740 (1979 prices).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00163478
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  • 5
    Electronic Resource
    Electronic Resource
    An active source electromagnetic sounding system for marine use (1990)
    Springer
    Marine geophysical researches 12 (1990), S. 59-68 
    Details
    ISSN: 1573-0581
    Keywords: electrical conductivity ; instrumentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Instrumentation has been developed for carrying out active source electromagnetic sounding experiments in the deep oceans. Experiments of this type are directly and uniquely sensitive to the presence of molten or partially molten material, to temperature structure and to the porosity of upper crustal rocks such as those that accommodate hydrothermal circulation systems. Electromagnetic sounding experiments therefore represent an extremely desirable addition to the existing range of geophysical techniques for studying geological processes in thermally, hydrothermally or magmatically active regions—for example, at oceanic spreading centres. The instruments can be operated in regions of rugged, unsedimented sea bottom terrain, and are designed for investigating the distribution of electrical conductivity within the oceanic crust and uppermost mantle. The instrumentation consists of a deep towed, horizontal electric dipole transmitter and a set of free-fall, sea bottom, horizontal electric field recording devices. The transmitter is a deep-towed instrument, which is provided with power from the towing ship through a conducting cable. The transmitter package is fitted with an integral echo sounder, which allows it to be towed safely a short distance above the seabed. Electromagnetic signals are transmitted from a neutrally-buoyant antenna array, which is streamed behind the deep tow. The sea bottom receiving instruments each consist of a recoverable package which contains the instrumentation and digital recording system, an acoustic release unit, four low-noise, porous electrodes arranged in two orthogonal, horizontal dipoles, and a disposable bottom weight. The instruments have been used at sea on three occasions. On their most recent use, active source signals were successfully recorded during an experiment to investigate crustal magmatism and hydrothermal circulation beneath the axis of the East Pacific Rise.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310563
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  • 6
    Electronic Resource
    Electronic Resource
    Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements of the Planets and Satellites (1980)
    Springer
    Celestial mechanics and dynamical astronomy 22 (1980), S. 205-230 
    Details
    ISSN: 1572-9478
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper is the entire report of the IAU Working Group on Cartographic Coordinates and Rotational Elements of the Planets and Satellites, including three annexes. Tables give the recemmended values for the directions of the north poles of rotation and the prime meridians of the planets and satellites. Reference surfaces for mapping these bodies are described. The annexes discuss the guiding principles, given in the body of the report, present explanatory notes, and provide a bibliography of the rotational elements and reference surfaces of the planets and satellites, definitions, and algebraic expressions of relevant parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01229508
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  • 7
    Electronic Resource
    Electronic Resource
    Galileo Probe Mass Spectrometer experiment (1992)
    Springer
    Space science reviews 60 (1992), S. 111-142 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Galileo Probe Mass Spectrometer (GPMS) is a Probe instrument designed to measure the chemical and isotopic composition including vertical variations of the constituents in the atmosphere of Jupiter. The measurement will be performed by in situ sampling of the ambient atmosphere in the pressure range from approximately 150 mbar to 20 bar. In addition batch sampling will be performed for noble gas composition measurement and isotopic ratio determination and for sensitivity enhancement of non-reactive trace gases. The instrument consists of a gas sampling system which is connected to a quadrupole mass analyzer for molecular weight analysis. In addition two sample enrichment cells and one noble gas analysis cell are part of the sampling system. The mass range of the quadrupole analyzer is from 2 amu to 150 amu. The maximum dynamic range is 108. The detector threshold ranges from 10 ppmv for H2O to 1 ppbv for Kr and Xe. It is dependent on instrument background and ambient gas composition because of spectral interference. The threshold values are lowered through sample enrichment by a factor of 100 to 500 for stable hydrocarbons and by a factor of 10 for noble gases. The gas sampling system and the mass analyzer are sealed and evacuated until the measurement sequence is initiated after the Probe enters into the atmosphere of Jupiter. The instrument weighs 13.2 kg and the average power consumption is 13 W. The instrument follows a sampling sequence of 8192 steps and a sampling rate of two steps per second. The measurement period lasts appropriately 60 min through the nominal pressure and altitude range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00216852
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  • 8
    Electronic Resource
    Electronic Resource
    Origin of the major planet atmospheres: Clues from trace species (1994)
    Springer
    Earth, moon and planets 67 (1994), S. 71-75 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00613292
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  • 9
    Electronic Resource
    Electronic Resource
    Ultrastructural localization of Lucifer Yellow and endocytosis in plant cells (1991)
    Springer
    Protoplasma 160 (1991), S. 115-120 
    Details
    ISSN: 1615-6102
    Keywords: Brocchinia reducta (Bromeliaceae) ; Coated vesicle ; Dictyosome ; Endocytosis ; Lucifer Yellow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The fluorescent dye Lucifer Yellow CH (LYCH) was localized at the ultrastructural level with a precipitation method using barium chloride. Applying this technique, endocytosis of LYCH was examined in the nutrient absorptive trichomes of a carnivorous bromeliad. After a two hour incubation, the electron dense reaction product was localized in the membrane compartments of the endocytotic system. These structures included coated regions of the plasma membrane, coated and smooth vesicles, dictyosomes, partially coated reticulum, and smooth endoplasmic reticulum. This procedure demonstrates for the first time at the ultrastructural level endocytosis in whole plant cells, using a non-toxic compound.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01539963
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  • 10
    Electronic Resource
    Electronic Resource
    The use of a water-soluble formazan complex to quantitate the cell number and mitochondrial function ofLeishmania major promastigotes (1994)
    Springer
    Parasitology research 80 (1994), S. 235-239 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract One of the methods to quantitateLeishmania major promastigotes (LmP) has been to utilize the formation of a formazan dye, which in turn is produced via conversion of an artificial substrate, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT). The method has one major drawback in that the formazan complex precipitates inside the parasites and has to be extracted by denaturants before measurements can be performed. By using a new synthetic substrate, 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfonyl)-2H-tetrazolium (MTS), the extraction procedure is eliminated as the formazan-like dye is released spontaneously into the medium, making it possible to perform several measurements on the same parasite culture without disturbing or killing the parasites. The measurements were shown to reflect the numbers of parasites as confirmed via comparative experiments using radioactive thymidine uptake and cell counting, respectively. The method is simple, fast, and highly reproducible and is suitable for drug screening, identification of drug-resistant isolates, and growth-kinetics studies. It is therefore contemplated that the MTS method will be a general and useful technique in this field of parasitology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00932680
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