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  • 1
    Electronic Resource
    Electronic Resource
    Structure of 3-(o-hydroxyphenyl)-1-phenyltriazene 1-oxide, C12H11N3O2 (1985)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 41 (1985), S. 142-144 
    Details
    ISSN: 1600-5759
    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/S0108270185003067
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  • 2
    Electronic Resource
    Electronic Resource
    Structure of triphenylphosphine–cyanoborane (1988)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 701-704 
    Details
    ISSN: 1600-5759
    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/S0108270187011624
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis of gaussian beam excited rectangular dielectric guide modes by ray theory (1986)
    Springer
    Optical and quantum electronics 18 (1986), S. 73-80 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract In the present paper, ray analysis of the wave propagation has been used to evaluate the excitation of a linear dielectric guide by a gaussian beam. The paper begins by determining the Green's function of the structure and also evaluates the excitation by gaussian beam therefrom, following Falsen and Shin [1].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02069362
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  • 4
    Electronic Resource
    Electronic Resource
    Selective ir laser chemistry of CDF3 in natural fluoroform (1986)
    Springer
    Applied physics 39 (1986), S. 187-190 
    Details
    ISSN: 1432-0649
    Keywords: 82.50 ; 33
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Selective decomposition of CDF3 at natural abundance level (≈150ppm) in fluoroform has been achieved by infra-red multiple-photon excitation at moderate substrate pressure using 100 ns FWHM CO2 laser pulses. Effects of energy fluence, number of laser pulses, buffer gas pressure and substrate pressure on decomposition yield and bulk selectivity are reported and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697418
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  • 5
    Electronic Resource
    Electronic Resource
    T/D isotope selectivity in CO2 laser induced multiple-frequency multiphoton dissociation of trifluoromethane-T (1989)
    Springer
    Applied physics 49 (1989), S. 139-143 
    Details
    ISSN: 1432-0649
    Keywords: 82.50 ; 33
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Isotope-selective multiphoton dissociation of CTF3 in the presence of CDF3 by TEA CO2 laser is studied. The highest T/D selectivity of 58 was observed at a sample pressure of 2 Torr in the presence of 20 Torr of argon on excitation by the 9P(24) CO2 laser line. The effect of multiple-frequency irradiation on selectivity is studied in the P and Q branches of the v 2 absorption band of CTF3. No improvement in the selectivity is noticed on going from single- to multiple-frequency irradiation. These results are compared with previous multiple-frequency work on the CTF3/CHF3 system, and explained in terms of strong spectroscopic interference from 13CDF3 in the present case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00332273
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  • 6
    Electronic Resource
    Electronic Resource
    Infrared laser multiple photon dissociation of thiophene in gas phase (1989)
    Springer
    Applied physics 48 (1989), S. 437-443 
    Details
    ISSN: 1432-0649
    Keywords: 82.50 ; 33
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Infrared laser multiple photon excitation/dissociation of Thiophene (Th) was studied as a function of Th pressure, laser pulse energy, pulse duration and added buffer gas. While the excitation process was probed via optoacoustic technique, the stable reaction products were analyzed by IR spectroscopy and mass spectrometry. Although C2H2 and CH3C≡CH were the major hydrocarbon products under all experimental conditions, the distribution of these, as well as higher hydrocarbons of lower yield, was found to be very much dependent upon the experimental conditions. The laser induced reaction under dielectric breakdown conditions with either high substrate pressure or laser energy produced significant amount of CS2 and unidentified polymer as well. We propose a mechanism involving breakage of the C−S bond in Th to form an unstable 1,5-diradical which further decomposed via different channels. However, at higher substrate pressures, radical-Th reactions complicated the overall chemistry of the system. Evidences for collisional energy-pooling and rotational hole-filling were also obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694545
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  • 7
    Electronic Resource
    Electronic Resource
    Meteorological effect on long distant 40 kHz signal (1985)
    Springer
    Meteorology and atmospheric physics 33 (1985), S. 365-379 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Die vorliegende Arbeit beschäftigt sich mit der Übertragung eines 40 kHz Signals auf langer Distanz, ungefähr von Osten nach Westen. Die Übertragungsstrecke betrug 5100 km und reichte von Sanwa in Japan bis nach Kalkutta in Indien. Dabei wurden Beobachtungen vom April 1981 bis März 1983 ausgewertet und neben den ionosphärisehen Effekten auch die jahreszeitlichen Schwankungen der Amplitude des empfangenen Signals sorgfältig untersucht. Der Amplitudenschwund zu Sonnenaufgang bleibt klar gegenüber dem ionosphärischen Sonnenaufgang zurück und ist einer jahreszeitlichen Variation unterworfen. Entlang des Ausbreitungsweges, der annähernd dem nördlichen Wendekreis folgt, sind die meteorologischen Jahreszeiten durch die Vormonsunperiode (März–Juni), durch den Monsun (Juli–September), der Nachmonsunperiode (Oktober–November) und durch den Winter geprägt. Die meteorologischen Parameter dieser Jahreszeiten drücken den Signalamplituden ihren Stempel auf. Diese sind bemerkenswert gut mit dem Produkt aus der Temperatur und relativer Feuchte korreliert, was auf die endliche Leitfähigkeit der feuchten Luft zurückzuführen ist, die die Dämpfung der Langwellen während ihrer multiplen Wege durch die Troposphäre kontrolliert.
    Notes: Summary Studies have been made over a two-year period from April 1981 to March 1983 on an approximately east-west propagation of a long distant (5100 km) radio wave at 40 kHz from Sanwa, Japan to Calcutta. Besides ionospheric effects, the seasonal variations of the amplitude of the received signal have been carefully examined in this paper. The regular amplitude of the signal shows that the sunrise fade minimum lags well behind the ionospheric sunrise and it varies from season to season. Along the path of propagation which is very close to the tropic of cancer, the four important meteorological seasons are pre-monsoon (March–June), monsoon (July–September), post-monsoon (October–November) and winter (December–February), and the meteorological parameters of these seasons have been found to impress the signal amplitude. The signal amplitude has been found to be remarkably related to the product of the temperature and relative humidity. The correlation lies on the fact that humid air possesses a finite conductivity which controls the attenuation of the long wave while passing through the tropospheric regions in multiple paths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02258486
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of geomagnetic storms on the sunrise fade of long distance 40 kHz signals (1986)
    Springer
    Meteorology and atmospheric physics 35 (1986), S. 227-235 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Das Schwinden von niederfrequenten 40 kHz-Signalen bei Sonnenaufgang wurde an Signalen, die über die große Distanz von 5100 km von Sanwa in Japan nach Kalkutta in Indien übertragen wurden, unter Verwendung der aufgenommenen Daten vom April 1981 bis März 1983, in Beziehung auf vorherrschende geomagnetische Stürme, kritisch untersucht. Die Schwindungsmuster zeigen drei unterschiedliche Typen: bei einem erfolgt die Abnahme in Stufen, beim zweiten zeigt sich eine Abnahme ohne Stufen und der dritte zeigt keine deutliche Abnahme. Der letzte Typ steht deutlich in Zusammenhang mit geomagnetischen Stürmen. Dieser Zusammenhang ist beim zweiten Typ weniger stark ausgeprägt und beim ersten ziemlich klein. Es wurde entdeckt, daß das Ausmaß des Schwindens bei Sonnenaufgang und die Geschwindigkeit des Schwindens vom Zenitwinkel der Sonne abhängig ist. Darüber hinaus wurde entdeckt, daß das Ausmaß des Schwindens mit Zunahme der Sonnenfleckenzahl zunimmt.
    Notes: Summary The sunrise fade of low frequency 40 kHz signals transmitted over a long distance path of 5100 km from Sanwa, Japan to Calcutta, India, was studied critically using the recorded data from April 1981 to March 1983 in relation to principal geomagnetic storms. The fade patterns exhibit three distinct types, one in which the decrease is in steps, a second one showing a decrease without steps, and a third one without significant decrease. The last type is significantly associated with principal geomagnetic storms. The association of the second one with principal geomagnetic storms is moderate, while that of the first one is fairly small. The magnitude of the sunrise fade and time-rate of fade have been found to depend on the solar zenith angle. Moreover, the fade magnitude is found to increase with increasing sunspot number.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01041815
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  • 9
    Electronic Resource
    Electronic Resource
    Blood Groups of the Angami Nagas (1940)
    [s.l.] : Nature Publishing Group
    Nature 145 (1940), S. 261-261 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] REFERENCE has been made in NATURE1 to the report of the British Association Research Committee on Blood Groups among Primitive Peoples. The blood group percentages of the Angami Nagas, based on 96 tests, are given as follows: ... These differ greatly from those on the same ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/145261b0
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  • 10
    Electronic Resource
    Electronic Resource
    Resistivity andI–V measurements of tetragonal Mn3O4 and dependence of nickel manganite on Mn3O4 content of NiO-Mn3O4 mixture (1987)
    Springer
    Journal of materials science 6 (1987), S. 958-960 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: 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/BF01729881
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