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  • Springer  (77)
  • American Association for the Advancement of Science (AAAS)
  • 1980-1984  (43)
  • 1975-1979  (34)
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  • 1
    Electronic Resource
    Electronic Resource
    The effect of hydrogen bonding on the bond lengths and angles in the carboxyl group (1979)
    Springer
    Journal of chemical crystallography 9 (1979), S. 87-105 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The effects of hydrogen bonding on the geometry of the carboxyl group have been studied systematically based on accurate X-ray crystallographic data. In general, the C-O(H) bond length increases with increasing O ⋯ O hydrogen-bond length, while the C=O bond length decreases. These variations become less pronounced for longer O ⋯ O distances. The O=C-O(H) and C-C-O(H) angles decrease with increasing O ⋯ O separation, while the C-C=O angle increases. The sum of the three angles remains close to 360 °, testifying to the planarity of the carboxyl group. These correlations are not observed to hold for cyclic hydrogen-bonded dimers, indicating that a continuous variation in the degree of disorder of the protons may be present, ranging from the ordered case with easily distinguishable C=O and C-O(H), to the 50%-50% disordered case, where the two C-O distances become equal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01387561
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  • 2
    Electronic Resource
    Electronic Resource
    A comparison between predicted and measured structural parameters in symmetric hydrogen bonds (1981)
    Springer
    Journal of chemical crystallography 11 (1981), S. 167-172 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The distance between two equilibrium proton sites in symmetric OHO bonds and its isotopic variation, determined from precise neutron-diffraction data, has been compared with the predicted values which were derived previously by the author using correlation curves in hydrogen-bond parameters. It is shown that a fairly good agreement was obtained between the observed and the predicted values, indicating the validity of the empirical relations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01210391
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  • 3
    Electronic Resource
    Electronic Resource
    DDQ cathodes for seawater cells (1982)
    Springer
    Journal of applied electrochemistry 12 (1982), S. 147-151 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract A positive electrode containing 2,3-dichloro-5,6-dicyano-p-quinone (DDQ) as the cathode active material was discharged in a magnesium seawater cell at room temperature. Analysis of the dissolved species of DDQ in water and potential sweep voltammetry studies were also carried out. The open circuit voltage of the DDQ-Mg cell was as high as 2.2 V and the single cell could be discharged at current densities greater than 50 mA cm−2. However, the current efficiencies for the DDQ cathodes in a three-cell immersion-type battery were not high enough for high drain applications, probably due to a high leak current through the common electrolyte.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00616896
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  • 4
    Electronic Resource
    Electronic Resource
    Fluorometric study of interaction between ACTH fragments and bovine adrenocortical membranes (1976)
    Springer
    Cellular and molecular life sciences 32 (1976), S. 1605-1607 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Corticotropin1–24 and [Gly1]corticotropin1–18 amide increased the fluorescence of 1-anilinonaphthalene-8-sulfonate which bound to the bovine adrenocortical membranes. The two ACTH fragments interacted with the protein of the membranes and increased the net positive charge of the membranes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01924478
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  • 5
    Electronic Resource
    Electronic Resource
    Biochemical characterization of 1,25(OH)2D3 receptors in chick embryonal duodenal cytosol (1982)
    Springer
    Calcified tissue international 34 (1982), S. 265-269 
    Details
    ISSN: 1432-0827
    Keywords: 1,25(OH)2D3 Receptor ; Chicken Duodenal Cytosol ; Chicken Embryo ; Affinity ; 1,25(OH)2D3 Concentration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary This study presents measurements of serum vitamin D metabolites, calcium and phosphorus as well as measurements of the equilibrium dissociation constant for duodenal 1,25(OH)2D3 receptor in 15-, 18-, 19-, and 20-day chick embryos in comparison to that in 1- and 118-day-old chicks and to vitamin D-deficient chicks. The present results showed that: (a) serum 1,25(OH)2D and 24,25(OH)2D levels rise from 15 and 18 to days 19 and 20 of embryonic development while serum phosphate levels are stable; (b) serum calcium levels rise at hatching to adult levels; (c) the duodenal 1,25(OH)2D3 receptor is detectable in 15-day-old embryo and has a Kd similar to that of 118-day-old vitamin D-replete chicks; and (d) the activity of 1,25(OH)2D3 receptor in chick duodenal cytosol is maximal at hatching.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02411248
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  • 6
    Electronic Resource
    Electronic Resource
    Thermal annealing and light irradiation effects on hole and electron drift mobilities of Se93.5As6.5 and Se94.3Ge5.7 films (1981)
    Springer
    Applied physics 26 (1981), S. 179-184 
    Details
    ISSN: 1432-0630
    Keywords: 72.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Thermal annealing and light irradiation effects on hole and electron drift mobilities were studied for amorphous Se93.5As6.5 and Se94.3Ge5.7 films by means of a time-of-flight technique. The electron drift mobility and its activation energy show a drastic increase after the heat and light treatments, while the hole drift mobility remains almost unchanged. The change of electron transport is attributed to a relaxation of local structural distortion, which is correlated with relatively shallow localized states. The present experimental results are inconsistent with the prior proposal that electron transport in amorphous selenides is correlated with Se8 ring molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00614754
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of sodium chloride on the respiratory function ofStaphylococcus aureus (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 1144-1145 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Sodium chloride at concentrations below 0.5 M, enhanced the respiratory activity (O2-consumption) ofStaphylococcus aureus under endogenous and sugar-supported conditions, but did not overcome the inhibitory action of sodium azide. Several sugars, including the glucose analoguea-methylglucoside, and their metabolites enhanced bacterial O2-consumption, but acetylmethylcarbinol was ineffective.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01963249
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  • 8
    Electronic Resource
    Electronic Resource
    Effect ofβ-phenylethylamine on intraocular pressure (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 641-641 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Upon injection of β-phenylethylamine (PEA) into the subconjunctival space of rabbit, intraocular pressure increased. This effect went parallel with the amount of PEA transferred into the anterior chamber, which indicates that intraocular pressure was elevated by direct action of PEA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01960371
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  • 9
    Electronic Resource
    Electronic Resource
    18p- Mosaicism (1978)
    Springer
    Human genetics 〈Berlin〉 44 (1978), S. 213-217 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The case of a 5-month-old male infant with 18p- mosaic, who has intractable seizures and severe ophthalmological abnormalities in addition to many clinical manifestations usually described in the 18p- syndrome, is reported. The proportions of abnormal cells are 7–8% in blood and 55% in skin. About 35% of the short arm of chromosome 18 is deleted. To our knowledge the present report is the fifth one of 18p- mosaic. The main interest of this case resides in the fact that it shows a serious clinical picture despite the low proportion of abnormal cells in blood and the small degree of deletion of the short arm of chromosome 18.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00295417
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  • 10
    Electronic Resource
    Electronic Resource
    Finitely determined singularities of formal vector fields (1982)
    Springer
    Inventiones mathematicae 66 (1982), S. 199-214 
    Details
    ISSN: 1432-1297
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01389391
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