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  • Springer  (8)
  • Blackwell Publishing Ltd
  • Nature Publishing Group
  • 2000-2004
  • 1985-1989  (2)
  • 1980-1984  (3)
  • 1975-1979  (3)
  • 1986  (2)
  • 1982  (3)
  • 1977  (2)
  • 1975  (1)
Publikationsart
Schlagwörter
Verlag/Herausgeber
Erscheinungszeitraum
  • 2000-2004
  • 1985-1989  (2)
  • 1980-1984  (3)
  • 1975-1979  (3)
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Cadmium and copper levels in seals, penguins and skuas from the Weddell Sea in 1982/1983 (1986)
    Springer
    Polar biology 5 (1986), S. 139-143 
    Details
    ISSN: 1432-2056
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Samples of muscle, liver and kidney of Weddell and crabeater seals, Adélie and emperor penguins, and McCormick's skuas collected in the Weddell Sea in the summer 1982/83 were analysed for cadmium and copper. In general, the study aimed at contributing to the establishment of base-line data on potential pollutants in Antarctic ecosystems. In particular, it aimed at increasing the amount of data on Cd and Cu levels in the same species that that had been collected and analysed two years eralier, thus improving the possibility of statistical analyses into relationships between metal contents and biological parameters or sampling-sites of the animals, but the data basis is still too small for the letter purpose. In all species together, concentration ranges (on dry weight basis) were 0.16–0.77, 3.7–96.8 and 15.6–491 mg cadmium and 1.6–21.4, 14.9–149 and 12.6–47.7 mg copper per kg in muscles, livers and kidneys, respectively. The relatively high levels of both metals in all species analysed, in connexion with the available literature, suggest that levels in marine mammals and birds can only, if at all, to a minor extent reflect differences in environmental concentrations of these metals.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00441693
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Computertomography in subarachnoid haemorrhage and aneurysm (1982)
    Springer
    Acta neurochirurgica 63 (1982), S. 17-22 
    Details
    ISSN: 0942-0940
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary 59 patients with SAH and an aneurysm were investigated by CT and angiography. In the 59 patients 67 aneurysms were found. The mean interval between SAH and CT was 8 days, between SAH and angiography 11 days. Blood in the CSF space was visualized up to the 9th day in the patients and 67% of those investigated showed blood in the CSF-space in the CT. In 31% of the patients an aneurysm, in 29% an intracerebral haemorrhage and in 19% a recent infarct was found. A hydrocephalus was seen in 13% of the patients. Of 12 patients with recent infarcts 8 showed vasospasm which correlated in time and location with the infarct.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01728850
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Thermodesorption of ultrathin organic films studied by reflection (1986)
    Springer
    Applied physics 39 (1986), S. 173-181 
    Details
    ISSN: 1432-0630
    Schlagwort(e): 44.50 ; 78.65 ; 81.40
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract Optical reflection measurements are described as a new and simple technique to measure thicknesses and thickness changes of ultrathin organic overlayers on inorganic support. The prime advantages are high sensitivity in thickness measurements (0.1–1 Å), applicability under varying environmental conditions, nondestructiveness, applicability on different supports and high time resolution. These features are assessed theoretically and experimentally studying Langmuir-Blodgett films on SiO2 and Au supports. These films, in this work prepared with the model compound arachidic acid, provide the salient feature of well-defined thicknesses in integer multiples of 26.7 Å. Application of the technique in thermodesorption experiments reveals distinguished binding states with binding energies (73–110 kJ/mol) depending on the counterion (Mg2+ or Cd2+) used in preparing the films and ratios of different states depending on thickness. The binding energy for the main component of multilayers (73 and 81 kJ/mol) with thickness larger than 100 Å is comparable to the heat of evaporation of bulk fatty acids. In addition an analytic expression between layer thicknesses and reflection is derived from the Fresnel equation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00620732
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    CNS cysticercosis — A problem of differential diagnosis (1982)
    Springer
    European archives of psychiatry and clinical neuroscience 231 (1982), S. 369-374 
    Details
    ISSN: 1433-8491
    Schlagwort(e): Cysticercosis ; Central nervous system ; Spinal cord myelography
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Although a well-known disease worldwide, cerebral cysticerosis in European countries is a rare event. Due to increased travel to East-Asian and Latin American countries it is possible that the occurrence of brain cysticercosis will become more frequent. These facts should remind us of the possibility of cysticercosis of the nervous system. A case of cerebral and spinal cord cysticercosis is presented, causing symptoms of progressive dementia with ventricular occlusion and hydrocephalus. Differential diagnosis causes a major problem. It is shown that myelography may demonstrate characteristic features of the disease.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00345592
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Morphometric analysis of several intracellular events occurring during the vegetative life cycle of the unicellular algaPolytoma papillatum (1982)
    Springer
    Protoplasma 110 (1982), S. 185-195 
    Details
    ISSN: 1615-6102
    Schlagwort(e): Morphometry ; Life cycle ; Chondriome ; Nucleus ; Leucoplast ; Polytoma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Quantitative electron microscopy of serial sections was used to study thePolytoma papillatum cell and some of its constituents (nucleus, chondriome, leucoplast) during its vegetative life cycle. The volumes of cells just entering into or passing through mitosis varied considerably and seemed to determine the number of subsequent division processes. Whereas a volumetric balance existed between the cell (100%) and the chondriome (8–9%) during the whole life cycle, there was a correlation between cell and nuclear volumes (8–10%) only during interphase growth and the onset of mitosis. At telophase the nucleus-to-cell-volume ratio was reduced to 2%, but gradually increased during cytokinesis (4.6% at early cytokinesis; 6.5% at late cytokinesis) until it reached the initial value again in newly formed daughter cells. The leucoplast-to-cell-volume ratio (10–26%) varied considerably without any recognizable dependence upon cell cycling. The mean short axis of mitochondrial profiles was proportional to the mean diameter (=thickness) of the mitochondria; the specific surface (outer membrane area per 100 μm3 mitochondrial volume), and the surface-to-volume ratio changed rhythmically. Changes in mitochondrial surface-to-volume ratio (Sc/Vc) were apparently correlated with changes in mitochondrial diameter (Dc). This relationship can be approximately described by the function Sc/Vc=4/Dc. Deviations of the surface-to-volume ratios of the nuclei from the surface-to-volume ratios of idealized spheres of equal size, indicating profound changes in nuclear shape, were found mainly during mitosis. Results were compared with those obtained from other morphometric investigations and discussed with regard to their functional meaning.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01283321
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Differential thermal analysis under high pressure (1977)
    Springer
    Colloid & polymer science 255 (1977), S. 170-171 
    Details
    ISSN: 1435-1536
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01777277
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Pressure and density dependence of capacity ratios in supercritical fluid chromatography (SFC) with carbon dioxide as mobile phase (1975)
    Springer
    Chromatographia 8 (1975), S. 274-276 
    Details
    ISSN: 1612-1112
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary Capacity ratios k have been determined for decane, hexadecane, eicosane, and squalane (2,6,10,15,19,23-hexamethyltetracosane) from SFC experiments between 30 and 70°C and up to 170 bar using chemically bonded Carbowax 400 and fluid carbon dioxide as stationary and mobile phases respectively. The results show that log k (ρmob) isotherms are much more appropriate than log k (p) isotherms (ρmob = density of the mobile phase,p=pressure) for the discussion of the pressure and temperature dependence of k values from SFC experiments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02270936
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Bestimmung kleiner Wassergehalte in Methanol mittels Differentialthermoanalyse (DTA) (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 216-218 
    Details
    ISSN: 1618-2650
    Schlagwort(e): Best. von Wasser in Methanol ; Thermoanalyse, Differential ; 0,02–1 Mol-%, Vergleich mit anderen Verfahren
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Eine Methode zur Bestimmung kleiner Wassergehalte in Methanol (0,02–1 Mol-%) mit Differentialthermoanalyse (DTA) wird beschrieben. Die Wirksamkeit verschiedener Trocknungsverfahren wird untersucht. Das Verfahren wird im Vergleich mit anderen Wasserbestimmungsmethoden in organischen Flüssigkeiten diskutiert.
    Notizen: Abstract A method is described in order to determine small water contents in methanol (0.02–1 mol-%) by differential thermal analysis. The efficiency of different drying procedures is studied. The technique is discussed in comparison with other methods of water analysis in organic liquids.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01155590
    Standort Signatur Einschränkungen Verfügbarkeit
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