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  • 1975-1979  (11)
  • 1979  (4)
  • 1976  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Isolation of gas vacuole-less mutants of the blue-green alga Anabaenopsis raciborskii (1976)
    Springer
    Archives of microbiology 111 (1976), S. 195-196 
    Details
    ISSN: 1432-072X
    Keywords: Mutation ; Blue-green alga ; Anabaenopsis raciborskii ; Gas vacuole ; Nitrogen fixation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract From a bloom forming blue-green alga, Anabaenopsis raciborskii, spontaneous mutants, which had lost the ability to form gas vacuoles have been isolated; the mutant frequency was 4.8×10-3. The filaments of gas vacuole-less mutants settled at the bottom of flasks in liquid culture media unlike the parent alga. The growth and nitrogen fixation were comparatively poor in the mutants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446569
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The attack of Co-Cr alloys by Ar-SO2 atmospheres (1979)
    Springer
    Oxidation of metals 13 (1979), S. 457-474 
    Details
    ISSN: 1573-4889
    Keywords: cobalt-chromium alloys ; oxidation sulfidation ; conjoint attack
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Cobalt alloys containing up to 25% chromium have been exposed to Ar-10% SO2 atmospheres at temperatures between 600 and 1000° C. The results show that, although an increase in chromium content leads to a reduction in the reaction rate, even to negligible rates in the cases of the higher chromium contents, all of the alloys are eventually subjected to rapid attack at more or less longer times, depending on the chromium content. The mechanism of the reaction appears to involve the formation of a more or less protective oxide layer which is eventually penetrated by sulfur. The sulfur forms chromium sulfides at the metal-scale interface, removing the chromium from solution and causing an expansion that cracks the protective scale, allowing both the ingress of gas and the formation of rapidly growing cobalt compounds. The process occurs rapidly with Co-5% Cr alloys, whereas, only the initial sulfur penetration is observed with Co-25% Cr alloys during the time scale of the investigation. The penetration of sulfur is thought to occur as a molecular gas species permeating through the scale down physical defects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00605110
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Possibility of 24MgH+ in the solar atmosphere-high resolution rotation-vibration spectra (1976)
    Springer
    Solar physics 49 (1976), S. 217-230 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High resolution rotation-vibration spectra of Δv = 1 and 2 sequences of 24MgH+ are obtained by a differencing process invoking the known structures of electronic bands observed in the region 214–340 nm. A reversal of R branch (band head formation) is noticed in each of the rotation-vibration bands. The J = 1 → J = 0 transition is predicted to be at 376098, 365301, 354286 and 342981 MHz for v = 0,1,2 and 3, respectively, in the ground electronic state 1∑+. The equilibrium rotational constants B e, α e and r e for the X 1•E+ state are found 6.4637cm−1, 0.1899 cm−1 1.6421 Å, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00162446
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The crystal and molecular structure of α-D-ribofuro[l',2':4,5]-2-oxazolidone, a decomposition product of 5-azacytidine (1976)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 32 (1976), S. 2329-2333 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740876007693
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  • 5
    Electronic Resource
    Electronic Resource
    2,2',4,4',6,6'-Hexachlorobiphenyl (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 35 (1979), S. 259-262 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740879003241
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The structure of bis[dichloro-6-mercaptopuriniumcopper(I)] dihydrate: a refinement (1976)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 32 (1976), S. 979-980 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S056774087600441X
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  • 7
    Electronic Resource
    Electronic Resource
    2-Azaadenosine hemihydrate (1979)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 35 (1979), S. 973-976 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740879005318
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  • 8
    Electronic Resource
    Electronic Resource
    Mutation to resistance for virusN-1 in the blue-green algaNostoc muscorum (1976)
    Springer
    Archives of virology 52 (1976), S. 85-90 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The spontaneous and nitrosoguanidine inducedN-1 virus resistant mutants of the blue-green algaNostoc muscorum were isolated with the average mutation frequency of 3.55×10−5 and 6.08×10−4 respectively. Of the surviving colonies 8 per cent became virus sensitive, whereas out of the remaining 92 per cent 9.3 per cent showed lysogenic behaviour and 13.3 per cent showed poor or no nitrogen fixing ability. Mutation to virus-resistance was independent of the presence of the virus. Spontaneous host range mutants of virus were not found in repeated experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01317867
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  • 9
    Electronic Resource
    Electronic Resource
    Role of catecholamines in the hypothermic activity of cannabis in albino rats (1976)
    Springer
    Psychopharmacology 50 (1976), S. 199-204 
    Details
    ISSN: 1432-2072
    Keywords: Cannabis ; Hypothermia ; Catecholamines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Role of brain monoamines in the hypothermic activity of cannabis resin (CI) in albino rats was studied using agents which influence monoamine synthesis, storage, release, reuptake, metabolism and receptor activity and monoaminergic neuronal activity. Delta-9-tetrahydrocannabinol content of resin was estimated to be 17%. Reserpine was used for comparison. CI was given orally in the dose of 50 mg/kg. Nialamide (NM) and α-methyl-metatyrosine (MMT) caused slight hyperthermia. p-Chlorophenylalanine (PCPA), α-methyl-p-tyrosine (MPT), 5,6-dihydroxytryptamine (DHT, icv) and 6-hydroxydopamine (6-HD, icv) had no effect on body temperature. α-Methyldopa (m-Dopa), diethyldithiocarbamate (DDC), DDC with l-Dopa, gammabutyrolactone (GBL), phentolamine (PHENT), phenoxybenzamine (PBZ), propranolol (PROP) and imipramine (IMP) produced hypothermia. Hypothermic activity of CI was potentiated by NM and PCPA, unaffected by DHT and m-Dopa, blocked by MMT, MPT, 6-HD, GBL, PHENT, PROP and chlorpromazine (CPZ), inhibited by DDC, DDC and l-Dopa and PBZ. CI induced hyperthermia in tolerant rats could be reversed to hypothermia by IMP. Reserpine hypothermia was blocked by NM, MPT, 6-HD and CPZ. There was a partial cross tolerance between cannabis and reserpine. Studies indicate that the hypothermic activity of CI similar to that of reserpine is mediated through central catecholamines and not 5-HT, and that noradrenaline is involved and not dopamine. However, the mechanism of action of cannabis and reserpine on nor-adrenergic neurone seems to be different.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00430493
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of magnetic ordering on superconducting pairing in some rare-earth compounds (1979)
    Springer
    Journal of low temperature physics 37 (1979), S. 389-396 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of Coqblin-Schrieffer-type interaction between conduction and rare-earth ion localized electrons on the superconducting order parameter δ of some ternary compounds is studied. A reentrant behavior of the order parameter is found. Superconductivity can be destroyed at two temperatures: at T c1 due to thermal pair breaking, and at T C2(〈 Tc1), when δ = Φ, Φ being related to magnetic ordering of rare-earth ions and spin polarization of conduction electrons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00119196
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