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  • 1
    Electronic Resource
    Electronic Resource
    On the compositional dependence of the optical gap and structural properties of amorphous In x Se1−x thin films (1991)
    Springer
    Journal of materials science 2 (1991), S. 174-176 
    Details
    ISSN: 1573-482X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The optical gap of the amorphous In x Se1−x thin film has been observed to decrease with increasing content of indium in the film (x). An attempt is made to interpret the compositional dependence of the optical gap in amorphous In x Se1−x thin film in an alloy-like approach. It has been found that introduction of higher concentrations of indium imparts greater stability to the structure of the indium selenium alloy. From the study of the radial distribution function (RDF) by X-rays it is observed that there is a correlation between the coordination number and the optical gap of indium selenide thin films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00696295
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of Y, Sm, Eu, Gd, Dy, Ho, Er in high purity terbium oxide by ICP-AES (1991)
    Springer
    Microchimica acta 103 (1991), S. 71-77 
    Details
    ISSN: 1436-5073
    Keywords: rare earths ; terbium oxide ; inductively coupled plasma atomic emission spectrometry (ICP-AES)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Inductively coupled plasma atomic emission spectrometry (ICP-AES) was employed to determine Y, Sm, Eu, Gd, Dy, Ho and Er in high purity terbium oxide. Terbium oxide was dissolved in 0.5 mol/l HNO3 and nebulized into the plasma generated by a 56 MHz RF generator at 1.5 kW output power. Using a Jobin-Yvon 1-m Czenry-Turner high resolution, high dispersion scanning monochromator, lines mutually interference-free as well as free of interference from the matrix Tb were chosen for the seven analytes. A set of standards containing the analytes in the concentration range 0.01–1.0 gmg/ml with 1 mg/ml Tb was used for calibration. It was necessary to apply background correction to the gross analyte line intensities in order to obtain linear calibration plots for the analytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01245054
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  • 3
    Electronic Resource
    Electronic Resource
    Polymer anchored metal complexes (1991)
    Springer
    Polymer bulletin 26 (1991), S. 145-150 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Pyromellitic dianhydride and dipyridyl/dipyridylamine have been polycondensed in presence of anhydrous ZnCl2 under selective conditions. Fe(III), Cr(III), Co(II), Ni(II) and Cu(II) complexes of the polycondensates have been prepared. Tentative structures for PMDA-DP (DPA)-M complexes have been proposed on the basis of elemental IR and electronic spectral analyses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00297518
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  • 4
    Electronic Resource
    Electronic Resource
    Polymer anchored metal complexes (1991)
    Springer
    Polymer bulletin 26 (1991), S. 151-157 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Thermal stabilities of these polymers are influenced by the nature of the 3d-metal and their initial decomposition temperatures are between 230–290°C in general. The dielectric constant values are essentially independent of the applied frequency and at 104 KHz reveal the trend: $$PMDA\mathop { - DP - }\limits_{(9.2)} Cr\left. {(III)} \right\rangle {\text{ PM}}\mathop {{\text{DA - D}}}\limits_{{\text{(8}}{\text{.7)}}} {\text{P - Fe}}\left. {{\text{(III)}}} \right\rangle {\text{ PM}}\mathop {{\text{DA - D}}}\limits_{{\text{(8}}{\text{.1)}}} {\text{P - Cu}}\left. {{\text{(II)}}} \right\rangle {\text{ P}}\mathop {{\text{MDA}}}\limits_{{\text{(8}}{\text{.0)}}} {\text{ - DP}}$$ Values for dielectric loss (tan δ) for these polymers are low (1–4×10-2 at 10 KHz) and unlike the dielectric constant, are strongly dependent on the applied frequency. The d.c.-conductivities of the polymers are in the range 4.5×10-8 – 4.7×10-10 (ohm-cm)-1 and depend on the metal ions: $$\left. {Fe^{3 + } } \right\rangle \left. {Cr^{3 + } } \right\rangle \left. {Ni^{2 + } } \right\rangle Cu^{2 + } $$
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00297519
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  • 5
    Electronic Resource
    Electronic Resource
    Adrenal corticosteroidogenesis after removal of ventral prostate gland (1991)
    Springer
    Cellular and molecular life sciences 47 (1991), S. 86-88 
    Details
    ISSN: 1420-9071
    Keywords: Prostatectomy ; adrenalΔ 5-3β-HSD ; serum corticosterone ; serum prolactin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Removal of the ventral prostate gland in adult male rats causes an increase in adrenal weight, and stimulation of adrenalΔ 5-3β-hydroxysteroid dehydrogenase activity along with elevation of serum levels of corticosterone and prolactin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041262
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  • 6
    Electronic Resource
    Electronic Resource
    Separation of tritium from deuterium by pulsed NH3 laser-selective multiple photon dissociation of CTCl3 (1991)
    Springer
    Applied physics 53 (1991), S. 246-249 
    Details
    ISSN: 1432-0649
    Keywords: 82.50 ; 33
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The multiple photon dissociation of ppm level CTCl3 in CDCl3 and the selectivity of T/D separation were investigated using a pulsed ammonia laser. The effect of laser frequency, fluence and buffer gas pressure on the dissociation rate and isotopic selectivity were studied. The depletion of CDCl3 was not observed within experimental errors. A lower limit of single step selectivity factor was found to be 〉5000 at 133 Pa substrate pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00357144
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  • 7
    Electronic Resource
    Electronic Resource
    Determination of the thermodynamic properties of liquid ethanol from 193 to 263 K and up to 280 MPa from speed-of-sound measurements (1991)
    Springer
    International journal of thermophysics 12 (1991), S. 381-395 
    Details
    ISSN: 1572-9567
    Keywords: sound velocity ; ethanol ; high pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The sound velocity in liquid ethanol has been measured up to 280 MPa and at temperatures between 193 and 263 K, using a phase-comparison, pulse-echo technique operating at 2 MHz. The density, isothermal compressibility, isobaric thermal expansion coefficient, and specific heat have been evaluated from the measured speed of sound starting from the density and specific heat data at 0.1 MPa and making use of a modified computational method originally developed by Davis and Gordon. The derived density data have been used to examine the validity of several empirical equations of state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00500759
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  • 8
    Electronic Resource
    Electronic Resource
    7th World Congress on water resources Rabat, Morocco, 13–18 May, 1991 (1991)
    Springer
    GeoJournal 25 (1991), S. 118-118 
    Details
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00179779
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  • 9
    Electronic Resource
    Electronic Resource
    Water for sustainable development in the 21st century: a global perspective (1991)
    Springer
    GeoJournal 24 (1991), S. 341-345 
    Details
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Notes: Abstract Many arid and semi-arid countries are feeling water crisis already at present, and the problem will become more serious in the 21st century. Global water consumption will increase, 10-fold during this century, and the increasing trend will continue well into the 21st century. This Presidential Address to the International Water Reserves Association discusses the reasons for the water crisis, and the major water issues of the 21st century. Among those issues are water conservation and efficient use of water, water pricing and cost recovery, social and environmental considerations, institutional responses to better management, management of international water bodies and proper analytical frameworks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00578255
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  • 10
    Electronic Resource
    Electronic Resource
    Confined phase of QED (1991)
    Springer
    International journal of theoretical physics 30 (1991), S. 789-806 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study resonant pair production in a strong electric field using the complex-time multiple reflection technique. The result is used to explain the occurrence of hadronic-like states ofe + e − andγγ observed in the collision of heavy-ion nuclei. It is suggested that the unusual em background created by the heavy-ion nuclei is equivalent to a gravitational background. We also explain the experimental low-lying bound states, using our approach.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00674021
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