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  • 1
    Electronic Resource
    Electronic Resource
    The ventral substrate response of fishes (1977)
    Springer
    Journal of comparative physiology 117 (1977), S. 209-217 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. In the vicinity of an underwater substrate (e.g., a wall) certain fishes tend to maintain a body posture with their ventral sides oriented towards the substrate. 2. This paper gives the first comparative data on thisVentral Substrate Response (VSR). It furthermore extends the present concept of theVSR, which has so far only been studied with regard to body roll responses, by including observations ofVSRs about the pitch axis. The rollVSR was termedVSRr, theVSR with the head in an upward position was namedVSRpu, and theVSR with the head pointing downward was given the nameVSRpd. 3. In some species allVSR forms may show a high gain whereas in others the gain ofVSRpu andVSRpd can be high and the gain of theVSRr is low. The question is raised whether this finding suggests a possible independence of the mechanisms controllingVSRs about the roll andVSRs about the pitch axis. 4. In fish, that are shown to guide theirVSRs visually, unilateral enucleation does not abolish theVSR behavior, if the seeing eye looks towards the substrate. Binocular interaction is thus not essential for this response. Other observations of unilaterally blinded animals led to the discovery of a new domain of support for the hypothesis that theVSR mechanisms are independent of those guiding theDorsal Light Response: rolling tendencies towards the intact eye occuring when the fish are kept in an environment lacking visible objects cease if such objects are introduced into the test tank. The independence ofVSR andDorsal Light Response mechanisms is also demonstrated by the fact that unilaterally enucleated fish show aVSRr at all. 5. VSRpu andVSRpd were studied in the weakly electric fishEigenmannia sp. These experiments revealed that, as earlier shown for theVSRr alsoVSRpu andVSRpd may be guided by non-visual cues in certain species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00612787
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  • 2
    Electronic Resource
    Electronic Resource
    Absence of detectable X rays from supercluster candidate 4U0134—11 (1977)
    [s.l.] : Nature Publishing Group
    Nature 270 (1977), S. 158-159 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Figure 1 represents the path of the OSO 8 spin axis through the region of 4U0134-11. The observation was performed between 7 and 13 July 1976. Catalogued X-ray sources in this region and their error boxes are shown. The detector is a xenon-filled proportional counter, efficient from 2 to 60 keV, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/270158a0
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  • 3
    Electronic Resource
    Electronic Resource
    Galactic distribution of X-ray burst sources (1977)
    [s.l.] : Nature Publishing Group
    Nature 267 (1977), S. 28-30 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Many other 'burst' events have been reported in the litera-ture20"23 but are omitted here, since they meet neither the criteria of rise time nor recurrence. It is very likely, however, that some of the many events observed by the Los Alamos group20"22 were X-ray bursts of the kind discussed here. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/267028a0
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  • 4
    Electronic Resource
    Electronic Resource
    Geochemische Untersuchung der Sedimente des Flusses Blies, Saarland (1976)
    Springer
    Naturwissenschaften 63 (1976), S. 144-145 
    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/BF00600489
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  • 5
    Electronic Resource
    Electronic Resource
    Thermoelastische Untersuchungen von Dien-Polymeren bei Dehnung und Kompression (1977)
    Springer
    Colloid & polymer science 255 (1977), S. 724-724 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01550211
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of continuous exposure to low frequency electric fields on three generations of mice: A pilot study (1976)
    Springer
    Cellular and molecular life sciences 32 (1976), S. 565-566 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Mice were allowed to mate, gestate, deliver and rear their offspring for 3 successive generations while being continuously exposed to 60 Hz electric fields. Mice exposed to vertical electric fields exhibited decreased body weights at 35 days postpartum and increased mortality, rates for 3 successive generations. Mice exposed to horizontal electric fields exhibited decreased body weights for 2 successive generations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01990163
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  • 7
    Electronic Resource
    Electronic Resource
    Abtrennung und radiochemische Bestimmung geringer Mengen Seltener Erden in extraterrestrischem Material (1975)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 274 (1975), S. 1-7 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Seltenen Erden in extraterrestrischem Material ; Aktivierungsanalyse, Neutronen ; Trenn. durch GC und Elektrophorese
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Neutronenaktivierungsanalyse ist für die Bestimmung Seltener Erden in extraterrestrischen Materialien gut geeignet. Nach einer Gruppenabtrennung der Lanthanoiden kann — ohne weitere Auftrennung der Seltenen Erden — die Radioaktivität und damit der Gehalt an Seltenen Erden ermittelt werden. Allerdings sind Abklingperioden von 26 Tagen erforderlich. Sollen die Analysenergebnisse in kurzer Zeit vorliegen, müssen die Seltenen Erden aufgetrennt werden. Gas-chromatographische und elektrophoretische Verfahren werden beschrieben. Die Nachweisgrenze nach der gas-chromatographischen Trennung von Metallchelaten kann durch die Verwendung radioaktiver Reagentien hoher spezifischer Aktivität wesentlich verbessert werden. Die bisherigen Experimente können jedoch nur als Modellversuche angesehen werden. Die elektrophoretische Trennung Seltener Erden liefert die Ergebnisse in wesentlich kürzerer Zeit (innerhalb 12 h), doch ist der manuelle Arbeitsaufwand bedeutend höher. Wegen der ausgezeichneten Auftrennung der einzelnen Seltenen Erden ist es aber möglich, eine β-Zählung der radioaktiven Seltenen Erden mit Hilfe der Flüssigszintillationsmethode automatisch und mit vorzüglicher Zählausbeute durchzuführen.
    Notes: Abstract The detection limits in neutron activation analysis are up to the standards of extraterrestrical matter analysis. Instrumental analysis is possible only after a group separation of the rare earth elements. The measurements requires a 26 day decay period. If results are desired within a shorter time interval the individual rare earth elements have to be separated. Gas chromatography and electrophoresis were applied in this work. Gas chromatography of metal chelates using radioactive reagents with high specific activity significantly improves the detection limits. The gas-chromatographic separations, however, should be only regarded as model experiments. The experimental results were obtained much faster (within 12 h) by applying high voltage electrophoresis of rare earth elements. Because of the excellent separation, the rare earth elements can be determined by automatic β-liquid scintillation spectrometry with high counting yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00440285
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  • 8
    Electronic Resource
    Electronic Resource
    Schwingungsspektren und Kraftkonstanten der Elpasolithe Cs2KMF6 (M = Sc, Y, La, Gd, Yb)Professor Josef Goubeau zum 75. Geburtstage am 31. März 1976 gewidmet (1976)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 420 (1976), S. 210-218 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Vibrational Spectra and Force Constants of the Elpasolites Cs2KMF6 (M = Sc, Y, La, Gd, Yb)The vibrational spectra of the elpasolites Cs2KMF6 (M = Sc, Y, La, Gd, Yb) have been recorded and assigned including the lattice vibrations. The vibrational frequencies thus obtained were used for the calculation of XVFF force constants. The values of the stretching force constants are discussed.
    Notes: Die Schwingungsspektren der Elpasolithe Cs2KMF6 (M = Sc, Y, La, Gd, Yb) wurden aufgenommen und einschließlich der Gitterschwingungen zugeordnet. Die so erhaltenen Frequenzwerte wurden zur Berechnung von Kraftkonstanten nach einem modifizierten Valenzkraftfeld benutzt. Der Gang der Valenzkraftkonstanten wird diskutiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19764200304
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  • 9
    Electronic Resource
    Electronic Resource
    Function of implanted cathodes in electrode-induced bone growth (1979)
    Springer
    Medical & biological engineering & computing 17 (1979), S. 769-775 
    Details
    ISSN: 1741-0444
    Keywords: Bone proliferation ; Direct current ; Electrode reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract The application of microampere direct current (d.c.) to electrodes implanted in bone results in a proliferative response that has been found useful in the treatment of certain types of fracture. The mechanism of this response is unknown. In this investigation, the d.c. polarisation properties of 11 implantable cathode materials were measured,in vitro andin vivo, and then related to the conditions known to produce the osteogenic response. From these data, limiting parameters for clinical use of the various electrodes can be determined. Nitrogen purge experiments showed the dependence of the current on molecular oxygen and suggested that the products of oxygen reduction (H2O2, O2 −, OH·, OH− etc.) may mediate the proliferation of bone by appropriate cells in the region of the electrode. The presence of these intermediates, some of which are free radicals, and their possible side effects needs further study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02441560
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  • 10
    Electronic Resource
    Electronic Resource
    Lattice vibration spectra. XXIIFor paper XXI in this series see H. D. Lutz, R.-A. Becker, B. G. Kruska and H. J. Berthold, Spectrochim. Acta (in press). - infrared and Raman spectra of strontium chloride dihydrate, SrCl2·2H2O and SrCl2·2(H, D)2O (1979)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 8 (1979), S. 189-194 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The infrared absorption and Raman spectra of SrCl2·2H2O powder as well as SrCl2·2D2O, and partially deuterated and isotopically dilute samples, have been recorded in the range from 30 to 4000 cm-1 at 95 and 295 K and analysed with regard to the strongly asymmetric force field in the H2O molecules. This is shown by an unusually large splitting of the OH and OD stretching fundamentals of the HDO molecules: 3426 and 3243 cm-1 and 2534 and 2408 cm-1 respectively at 95 K. Uncoupled OD stretching frequencies of SrCl2·6H2O and SrCl2·H2O are also presented. In SrCl2·2H2O both a relatively strong and a weak hydrogen bond to chloride ions are present; these are essentially straight.The spectra of SrCl2·2H2O exhibit the following characteristics: (1) no intramolecular coupling of the OH stretching vibrations; (2) very large Fermi resonance of νOH and 2δH2O; (3) the same high intensity of H2O twisting librations in the infrared spectra as for wagging and rocking modes; (4) splitting of the librational fundamentals of the HDO molecules, as large as 100 cm-1, caused by different structural arrangements of the H and D atoms in the asymmetric H2O molecules; and (5) strong intermolecular coupling of bending and librational fundamentals, which results in correlation splittings up to 75 cm-1. Possibilities of assigning the librational modes of H2O molecules which are in an asymmetric force field are discussed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250080403
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