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  • Articles: DFG German National Licenses  (14)
  • 1975-1979  (7)
  • 1965-1969  (5)
  • 1960-1964  (2)
Source
  • Articles: DFG German National Licenses  (14)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Intensity of the Geomagnetic Field during a Reversed Polarity (1966)
    [s.l.] : Nature Publishing Group
    Nature 212 (1966), S. 274-275 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Data for the secular variation based on direct observations and archeomagnetism are available only for the past few thousand years. The intensity of the geomagnetic field more than six thousand years ago is scarcely known, particularly during a period of reversed polarity. Demagnetization by ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/212274a0
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A Particular Geomagnetic Daily Variation ( Sq p ) in the Polar Regions on Geomagnetically Quiet Days (1962)
    [s.l.] : Nature Publishing Group
    Nature 195 (1962), S. 555-557 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A PRELIMINARY investigation of geomagnetic variation in the antarctic region1 has shown that the geomagnetic daily variation field, Sq, on quiet days in the dark polar region, is almost an extension of the well-known Sq -field in temperate latitudes, Sq0, but in the sun-lit polar region, a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/195555a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A novel cell-fusion method of protoplasts by polyvinyl alcohol (1978)
    Springer
    Naturwissenschaften 65 (1978), S. 263-264 
    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/BF00368577
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    ‘Memory’ of Initial Remanent Magnetization and Number of Repeating of Heat Treatments in Low-temperature Behaviour of Hæmatite (1961)
    [s.l.] : Nature Publishing Group
    Nature 190 (1961), S. 620-621 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The thermo-remanent magnetization and the isothermal remanent magnetization of the synthetic haematite powders were subjected to the repeated cooling-heating cycles between liquid nitrogen temperature and room temperature. In both cases, change in the intensity of remanent magnetization after the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/190620a0
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Innervation by W-type retinal ganglion cells of superior colliculus neurons projecting to pulvinar nuclei in cats (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 336-338 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Neurons of the cat superior colliculus (SC) sending their axons to the pulvinar nuclei were identified electrophysiologically as the ones responding antidromically to electrical stimulation of the pulvinar nuclei. They were located in the superficial layers of SC and found to be innervated by axons of W-type ganglion cells of the retina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01964337
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A modified wire-loop method for quantitative electron microscopic radioautography (1978)
    Springer
    Histochemistry and cell biology 57 (1978), S. 93-96 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A simplified method of emulsion coating and development for quantitative electron microscopic radioautography without any special instrument is introduced. Seven grids carrying ultrathin sections are attached to a glass block with double-coated Scotch tape. They are coated with a wire-loop, 2.5 cm in diameter. Ten glass blocks are then stuck on a slide, exposed, developed, fixed and stained simultaneously. Employing this method, the emulsion coating and the following procedures are easily accomplished under an identical condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00507359
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Electron microscopic dry-mounting radioautography for diffusible compounds by means of ultracryotomy (1977)
    Springer
    Histochemistry and cell biology 54 (1977), S. 75-82 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Cultured HeLa cells or mouse liver and pancreas tissues were labeled with 3H-thymidine, -uridine or -glycine for varying periods in vitro, frozen in liquid nitrogen and cut on an LKB ultrotome equipped with LKB Cryokit. Dry ultrathin sections were mounted on grid meshes and were either air-dried, freeze-substituted or freeze-dried, and were covered with dry films of radioautographic emulsions, exposed, developed, stained and were observed in electron microscopes. After a number of trials, it was possible to obtain fairly good preservation of both cell structure and radioisotopes by means of freeze-dried and drymounted ultrathin frozen sections. However, the results are not completely satisfactory at the present time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00493331
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Incorporation of tritiated thymidine into mitochondrial DNA of the liver and kidney cells of chickens and mice in tissue culture (1967)
    Springer
    Histochemistry and cell biology 10 (1967), S. 305-308 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 3H-thymidine incorporation into mitochondrial DNA of the liver and the kidney cells of chick embryos and newborn mice in tissue culture was shown by means of electron microscope radioautography with accurate localization. In these cells, about 20% of all the mitochondria were labeled at their matrices between the cristae within 4 hours in contact with the radioisotope, which were removed by DN'ase. From the results, it is clear that the mitochondria of avian and mammalian cells in tissue culture synthesize DNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304312
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Ultrastructural localization of glycogen in the granulocytes of normal rabbit bone marrow (1978)
    Springer
    Histochemistry and cell biology 58 (1978), S. 103-111 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The glycogen of rabbit granulocytes has been studied in glutaraldehyde and osmium tetroxide fixed bone marrow by the periodic acid-thiocarbohydrazide-silver proteinate procedure (PA-TCH-SP). The PA-TCH-SP procedure involved the staining of intracytoplasmic glycogen more densely than the routine lead citrate staining. The PA-TCH-SP procedure demonstrated the intracytoplasmic glycogen in all three kinds of granulocytes. Though a sequence of intensity was observed in each stage of cell maturation, intracytoplasmic glycogen increased generally in accordance with cell maturation in the granulocytes. Functional significance of the glycogen in the granulocytes was discussed in relation to its staining. A very weak reaction in the granules of the granulocytes was described in relation to their contents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00489955
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    A new technique for electron microscopic dry-mounting radioautography of soluble-compounds (1969)
    Springer
    Histochemistry and cell biology 18 (1969), S. 241-249 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new technique for dry-mounting electron microscopic radioautography of water soluble-compounds has been established. Tissues containing labelled compounds are cut as small as less than 1 mm in diameter, plunged into isopentane cooled to about −160° C with liquid nitrogen, and frozen-dried at −50° C for 24–48 hours. After drying, the tissues are embedded in Epon, which is polymerized according to the conventional procedure. Ultrathin sectioning is accomplished with ethylene glycol instead of water in the knife trough so that water is not involved in the floatation and expansion of the ultrathin sections. Sections are picked up on collodion coated grid meshes from ethylene glycol. Radioautographic emulsion is diluted 1 part in 10 parts with distilled water at 40° C. Ten ml of the diluted emulsion is added with 0.2 ml of 2 per cent aqueous solution of dioctyl sodium sulfosuccinate. A thin film of the emulsion is obtained by dipping a platinum wire loop into the emulsion. The loop is set on a flat surface of a desk for air-drying. The dried film is then applied to the mesh and it is warmed at 37° C for 1 hour in order to help the film to adhere to the mesh. Thus, dry-mounting of packed monolayers of radioautographic silver crystals can be constantly achieved. The mesh is then exposed, developed and stained according to the conventional technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306170
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    Paper (German National Licenses)
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