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  • Articles  (20)
  • Analytical Chemistry and Spectroscopy  (20)
  • AERODYNAMICS
  • Cell & Developmental Biology
  • METEOROLOGY AND CLIMATOLOGY
  • 1980-1984  (20)
  • 1935-1939
  • 1982  (20)
  • 1935
  • Physics  (20)
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  • Articles  (20)
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  • 1980-1984  (20)
  • 1935-1939
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  • 1
    Electronic Resource
    Electronic Resource
    Raman spectrum of NH4ReO4 at high pressure (1982)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 13 (1982), S. 53-55 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The pressure dependences at room temperature of the translational lattice modes and of the ν2 and ν4 internal bending modes of the ReO4- ion in solid NH4ReO4 are reported. There is no evidence of any phase transition up to a pressure of 15 kilobar. The pressure coefficients of the translational modes are 2.0 cm-1 GPa-1 and 3.0 cm-1 GPa-1 for the Bg and Eg modes respectively. The pressure coefficients of the bending modes are 1.0 cm-1 GPa-1 and 5.4 cm-1 GPa-1 for the Bg and Ag components of ν2, and 4.1 cm-1 for the overlapped Bg and Eg components of ν4.The symmetry assignments of the low frequency lines in the spectrum were checked by means of polarized Raman spectra of a single crystal. The previous assignments are correct.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250130110
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  • 2
    Electronic Resource
    Electronic Resource
    Rapid determination of ash in coke using Compton scattering (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 11 (1982), S. 154-155 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The Compton scattering technique for rapid determination of ash content in coal has been extended to coke samples. Some improvements in respect of the sample preparation and possible line overlap and background have been incorporated. A modified regression equation used in this work to compute the x-ray data is found to yield good results.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300110403
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  • 3
    Electronic Resource
    Electronic Resource
    Comprehensive major and trace element analysis of geological material by x-ray fluorescence, using low dilution fusions (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 11 (1982), S. 55-63 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A rapid method of routine whole rock analyses of major and trace elements, using low dilution fusions, is described. The method is particularly suited to use with automated x-ray fluorescence equipment, and is effective for rocks which range widely in composition. Corrections for matrix effects based on a matrix of influence coefficients, the calculation of a mass absorption coefficient from major component data and Compton scatter methods are discussed; data are presented which demonstrate that all three procedures can be used with low dilution fusions. Spectral impurities (principally of Cu, Ni and Zn) which cause problems in some trace element analyses using low dilution fusions and may also affect pressed rock powder studies are investigated and a simplified correction procedure is proposed. Lower limits of detection, accuracy and precision for determinations of 20 elements, carried out using low dilution fusions, indicate that the low dilution fusion procedure is well suited to routine whole rock analyses of major and trace elements.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300110206
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  • 4
    Electronic Resource
    Electronic Resource
    Simultaneous multielement analysis of phosphates by x-ray fluorescence (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 11 (1982), S. 8-12 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: An accurate, rapid and relatively cheap method adapted for use in the phosphate industry for on-line simultaneous multielement analysis of phosphate ore and calcined phosphate, using x-ray fluorescence, is described. The method of analysis is sufficiently accurate for the phosphate industry, which demands great accuracy in P2O5 analysis. A statistical evaluation of precision and accuracy is given.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300110104
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  • 5
    Electronic Resource
    Electronic Resource
    Quantitative determination of argon in sputtered films by wavelength-dispersive electron probe microanalysis (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 11 (1982), S. 32-34 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A method is described for the calibration of Ar Kα counting rates, measured using crystal spectrometers equipped with Ar-flow proportional counters. Linear extrapolation from overvoltage corrected x-ray yields of the elements with Kα x-ray energies lower than those of the ArK absorption edge gives an accurate description of the experimental Ar Kα intensity ratios from counters operated at different values of gas pressure. Results of all-element film analyses provided by a matrix correction procedure, ZAF, indicate an accuracy better than 5% relative for the determination of Ar concentrations ranging from 0.1 to 10 wt%.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300110109
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  • 6
    Electronic Resource
    Electronic Resource
    Quantitative electron probe microanalysis using Gaussian φ(ρz) Curves (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 11 (1982), S. 187-193 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The Gaussian expression for φ(ρz) has been used as the basis of a computer program for quantitative electron probe microanalysis. Corrections for absorption and atomic number are combined within the expression for φ(ρz) whereas the fluorescence correction is based on numerical integration over the primary and secondary intensities. Error histograms based on about 500 published analyses of standard specimens have been used to adjust the parameters in the Gaussian expression for optimum accuracy. The resultant error histograms are as narrow as those obtained for the most accurate of the current ZAF correction procedures. Extension of the method to non-normal electron incidence is relatively straightforward.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300110411
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  • 7
    Electronic Resource
    Electronic Resource
    The vibrational spectrum, normal coordinate analysis and conformational equilibrium of 3-chloro-2-methylpropeneNRCC Contribution No. 20055. (1982)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 13 (1982), S. 30-37 
    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 spectra of gaseous and liquid 3-chloro-2-methylpropene and the Raman spectra of the compound as gas, liquid and frozen solid have been recorded. Several bands present in the Raman spectrum of the liquid were found to be absent or greatly reduced in intensity in the spectrum of the solid phase, thus indicating the presence of a conformational equilibrium. The Raman polarization data show that the gauche conformer of this compound is the more stable. A study of the temperature dependence of the relative intensities of two Raman bands due to different conformers led to values of ΔHθ of 2.5±0.5 kJ mol-1 and ΔSθ of -4.8±2.0 JK-1 mol-1 for the conformational equilibrium in the liquid phase. These results are consistent with a conformational equilibrium of the type gauche⇌s-cis, as found for a number of related molecules. A complete vibrational assignment has been proposed for the spectral data, except for the unobserved methyl torsion, aided by a normal coordinate treatment.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250130107
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  • 8
    Electronic Resource
    Electronic Resource
    Vibrational spectrum and conformation of cyclopropyldimethylborane (1982)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 12 (1982), S. 111-117 
    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 (3500-50 cm-1) and Raman spectra (3500-10 cm-1) have been recorded for cyclopropyldimethylborane in both the gaseous and solid states. Additionally, the Raman spectrum of the liquid was recorded and qualitative depolarization values were obtained. Only one conformation has been found in all three physical states and, on the basis of the polarized nature of the Raman band assigned as the BC2 antisymmetric stretch, this conformer is identified as being the bisected structure with Cs molecular symmetry. A complete vibrational assignment, except for the BC2 and two methyl torsional modes, is proposed based on the depolarization data, infrared gas phase band contours, and group frequencies. These results are compared to the corresponding data for several other organoboranes.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250120204
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  • 9
    Electronic Resource
    Electronic Resource
    Effet de la Temperature sur les Modes Externes de Vibration du Monocristal. La2(SO4)3·9(H,D)2O (1982)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 12 (1982), S. 152-156 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The polarized Raman spectra in the region 0-400 cm-1 of oriented single crystals of La2(SO4)3.9H2O and La2(SO4)3. 9D2O have been recorded between 14 and 297 K. The behaviour of the external modes is analysed in order to elucidate the role of the hydrogen-bonds and the lanthanum-oxygen interactions in the order-disorder transition observed at approximately 170 K. Large changes in the shape and intensities of the external bands with temperature (not detected in the region of internal vibration of the spectrum) have been observed.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250120213
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  • 10
    Electronic Resource
    Electronic Resource
    Editorial note (1982)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 12 (1982), S. iii 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250120320
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