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  • Springer  (9)
  • Nature Publishing Group  (1)
  • Blackwell Publishing Ltd
  • Blackwell Science, Ltd
  • 2000-2004
  • 1985-1989
  • 1980-1984  (3)
  • 1975-1979  (6)
  • 1955-1959
  • 1880-1889  (1)
  • 1983  (3)
  • 1979  (2)
  • 1976  (4)
  • 1887  (1)
Document type
Keywords
Publisher
Years
  • 2000-2004
  • 1985-1989
  • 1980-1984  (3)
  • 1975-1979  (6)
  • 1955-1959
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Rotational diffusion of band 3 proteins in the human erythrocyte membrane (1976)
    [s.l.] : Nature Publishing Group
    Nature 263 (1976), S. 389-393 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Band 3 proteins rotate in the human erythrocyte membrane; rotation is almost certainly confined to an axis normal to the plane of the membrane and is characterised by a diffusion coefficient of the order of 1,000 s−1. Spectrin does not restrict rotational motion of band 3 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/263389a0
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  • 2
    Electronic Resource
    Electronic Resource
    Die norditalienische Erdbebenserie vom Mai 1976 (1976)
    Springer
    Naturwissenschaften 63 (1976), S. 430-430 
    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/BF00599412
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  • 3
    Electronic Resource
    Electronic Resource
    Molecular weight analysis of proteinuria in experimental glomerulopathies (1976)
    Springer
    Research in experimental medicine 167 (1976), S. 23-30 
    Details
    ISSN: 1433-8580
    Keywords: Proteinuria ; Glomerulonephritis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The quantity of urinary proteins and their molecular weight composition was analyzed in different experimental glomerulopathies using the SDS-PAA-electrophoresis. Masugi nephritis, heterologous and autologous immune complex nephritis as well as D-penicillamine induced glomerulonephritis were studied in rabbits, guinea pigs and rats. The procedure allows (1) to distinguish physiological from low grade glomerular proteinuria by their respective characteristic patterns in early disease stages (2) to follow up the disease course of individual animals without sacrifice and (3) to discriminate species specificity of physiological urinary proteins. It is recommended to use this technique of urinary protein analysis in experimental conditions, where mild glomerular damage is expected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02180285
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  • 4
    Electronic Resource
    Electronic Resource
    Chalcides and pnictides of group VIII transition metals: Far-infrared spectroscopic studies on compounds MX 2, MXY, and MY 2 with pyrite, marcasite, and arsenopyrite structure (1983)
    Springer
    Physics and chemistry of minerals 9 (1983), S. 109-114 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract The far-infrared (FIR) spectra of pyrites, marcasites and loellingites, and arsenopyrites of the type MX 2, MY 2, and MXY with M=Fe, Co, Ru, Rh, Os, Ir X=S, Se, Te, and Y=P, As, and Sb have been studied, including group theoretical treatment of the phonon modes. The internal Y - Y and X - Y stretching modes, infrared (IR) allowed only in the case of the arsenopyrites, have been found to be in the range 440–490, 470–510, 450–490, 430–450 and 400–420 cm−1 for MP 2, MPS, MPSe, MAsS, and MSbS type compounds, respectively. From the obtained spectra intensity weighted mean phonon frequencies, i.e. central frequencies as defined by Plendl (1961), and mass weighted ones have been calculated and interpreted in terms of the strength of the MX and MY bonds, especially comparing 3d, 4d, and 5d transition metal compounds. Method of preparation and X-ray data of the chalcides and pnictides studied are also given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00308366
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  • 5
    Electronic Resource
    Electronic Resource
    Biological activity of some conjugated gibberellins (1976)
    Springer
    Planta 132 (1976), S. 249-257 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The biological activity of several gibberellin (GA) conjugates was studied and compared with that of the corresponding free GAs. The following conjugates were included: O(3)-β-d-glucopyranosides of GA1, GA3 and GA4; O(13)-β-d-glucopyranosides of GA1, GA3 and GA5; O(13)-β-d-glucopyranosyl-GA5-β-d-glucopyranosyl ester; GA3-β-d-glucopyranosyl ester and GA3-α-d-glucopyranosyl ester; N-GA3-oyl-glycine, its methyl ester, N-GA3-oyl-glycylglycine, and N-GA3-oyl-proline. All compounds were synthesized chemically but some of them are known to occur as endogenous plant products, or to be formed in plants upon application of a free GA. Activity was determined in the dwarf pea, dwarf corn, dwarf rice, and lettuce hypocotyl bioassays. The GA conjugates were found to posses different relative activities depending on the chemical structure, the bioassay system, and the site of application (shoot or roots). It is concluded that the activity of GA conjugates as measured in different bioassays is based upon the ability of plant enzymes and possibly of certain microorganisms to hydrolyze glucosidic, glucosyl ester, and amide-like linkages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00399724
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  • 6
    Electronic Resource
    Electronic Resource
    Buchbesprechungen (1979)
    Springer
    Naturwissenschaften 66 (1979), S. 62-64 
    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/BF00369372
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  • 7
    Electronic Resource
    Electronic Resource
    Wie überraschend treten Erdbeben auf? (1979)
    Springer
    Naturwissenschaften 66 (1979), S. 65-72 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract The seismic focal process is controlled by two kinds of physical parameters: On the one hand, stable entities namely the tectonic-stress field, the dimensions of elastically reacting volumes, and the size and orientation of preexisting fractures; on the other hand, frictionlike processes which greatly influence the situation before an earthquake and the seismic dislocations. Because of the singular direction of fault movements the friction processes change in an irreversible manner. These continuously changing situations determine, however, the relationship between aseismic creep and seismic movements. The friction phenomena also determine the distribution of seismic dislocations on focal surfaces of different geometric area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00373496
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  • 8
    Electronic Resource
    Electronic Resource
    Correspondenz (1887)
    Springer
    Plant systematics and evolution 37 (1887), S. 409-409 
    Details
    ISSN: 1615-6110
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01648385
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  • 9
    Electronic Resource
    Electronic Resource
    Morphometric and chronobiological studies on the dynamics of the nuclear envelope and the nucleolus during mitosis of the colorless phytoflagellatePolytoma papillatum (1983)
    Springer
    Protoplasma 118 (1983), S. 19-35 
    Details
    ISSN: 1615-6102
    Keywords: Morphometry ; Mitosis ; Nuclear envelope ; Nucleolus ; Polytoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Quantitative electron microscopy of serial sections was used to study the cyclical changes in the nucleus ofPolytoma papillatum during its vegetative life cycle with special reference to mitosis. Particular attention was paid to the fluctuations in the nuclear volume, the nuclear envelope, and the nucleolus. Whereas a volumetric balance exists between the cell (100%) and the nucleus (ca. 8%) from early interphase to late anaphase, the nucleus-to-cell volume ratio is gradually reduced up to ca. 2% during telophase. This disproportion is gradually equalized during cytokinesis. The decrease in nuclear size is brought about by: (a) Constrictive abscission of hernia-like protrusions of the nucleus (“blebbing process”); (b) Ade novo production of membraneous septa across peripheral regions of the nucleus (“internal septation”). Just before or immediately after completion of this internal compartmentalization of the nucleus, the original envelope opens, releasing a portion of nucleoplasm into the cytoplasm (“membrane sluice process”); (c) Gaps in the nuclear envelope were occasionally found during telophase and may also permit nucleoplasm to leak out. Disorganization of the nucleolos, which is preceded by blending of its two major components (pars fibrosa, pars granulosa) starts at prophase via fragmentation. Subsequent dispersion continues until the nucleolus is more or less homogeneously distributed across the metaphase nucleus. During anaphase a good deal of the preexisting material recondenses around the separating chromosomes, but a considerable amount remains dispersed in the nucleoplasm and is extruded into the cytoplasm during nuclear volume reduction. Reorganization of the nucleolus occurs during telophase and early cytokinesis via further coalescence of the recondensed material and simultaneous reconstruction of the spatial separation of pars fibrosa and pars granulosa. Morphofunctional aspects of nucleo- and nucleologenesis are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284743
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  • 10
    Electronic Resource
    Electronic Resource
    Determination of the capacity ratios of some fatty acid phenyl esters in supercritical carbon dioxide by supercritical fluid chromatography (SFC) (1983)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 316 (1983), S. 265-267 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Capacity ratios k have been determined for phenyl myristate, phenyl palmitate and phenyl stearate from SFC experiments at 35 to 56° C and 85 to 190 bar, using supercritical CO2 as the mobile phase and Perisorb A and Perisorb RP8 as stationary phases. For the esters examined a rise in pressure from 90 to 190 bar produces a drop of k of at least one order of magnitude giving evidence of the rapidly increasing solvent power of supercritical CO2 with increasing density. At a constant CO2 density, k decreases with increasing temperature. The separation of the three esters was found to be the better the lower the pressure was.
    Notes: Zusammenfassung Es wurden die Kapazitätsverhältnisse k von Phenylmyristat, Phenylpalmitat und Phenylstearat aus fluid-chromatographischen Untersuchungen mit überkritischem CO2 als mobiler Phase und den stationären Phasen Perisorb A und Perisorb RP8 bestimmt. Die Messungen wurden bei Temperaturen von 35 bis 56° C und bei Drücken von 85 bis 190 bar durchgeführt. Die Kapazitätsverhältnisse der Probesubstanzen werden durch eine Druckerhöhung von 90 auf 190 bar um mindestens eine Größenordnung verringert; das zeigt, daß die Löslichkeit der untersuchten Ester in überkritischem CO2 stark mit steigender Dichte des CO2 zunimmt. Bei konstanter Dichte bewirkt eine Temperaturerhöhung eine Verkleinerung des Kapazitätsverhältnisses. Mit beiden stationären Phasen ist die Trennung der drei Ester bei niedrigeren Drücken besser als bei höheren Drücken.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00488199
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