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  • Chemical Engineering  (8)
  • ATOMIC AND MOLECULAR PHYSICS  (6)
  • 2010-2014
  • 1980-1984  (5)
  • 1975-1979  (6)
  • 1970-1974  (2)
  • 1955-1959  (1)
  • 1950-1954
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  • 1
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    Resonance lines of Cs II, Ba III, and La IV (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The resonance line spectra of ions in the Xe I isoelectronic sequence, consisting of the five transitions to the 5p6 150 ground state from levels with J = 1 in the 5p5 5d and 6s configurations, have been observed for Cs II, Ba III, and La IV. The observations were made with a sliding spark on the 10.7-m normal-incidence vacuum spectrograph at NBS. The resonance transitions from the 5p5 6d and 7s configurations were also observed for these ions, except for that from 5p5 6d 3P1 of Ba III. Several resonance transitions from higher nd and ns levels were also observed. Estimated values for the J = 1 levels of the 5p5 7s configuration of Ce V were obtained by extrapolation. The derived ionization energies in eV are Cs II 23.17(4), Ba III 35.79(6), La IV 45.95(6), Ce V 65.55(25).
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Optical Society of America; vol. 65
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Spectrum of doubly ionized yttrium /Y III/ (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Optical Society of America; vol. 65
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Resonance lines and energy levels of Cs III, Ba IV, and La V (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Spectra of Cs III, Ba IV, and La V were photographed in a low-voltage sliding spark on a 10.7 m normal-incidence vacuum spectrograph. These ions are isoelectronic with neutral iodine and display a halogen-like energy level structure. Detailed isoelectronic comparisons, level transition diagrams, and tabular data on the transitions of the ions and percentage compositions of Cs III configurations are presented.
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Optical Society of America; vol. 66
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Spectrum and energy levels of triply ionized yttrium/Y IV/ (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Optical Society of America; vol. 72
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Note on the symmetry of perturbed Hartree-Fock and X-alpha wavefunctions (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: An objection to the effect that the first-order orbitals describing the perturbation of Hartree-Fock or X-alpha closed shell atoms by a multipole electric field may not have the required symmetry properties is acknowledged and answered. It is shown that the assumption of the expected symmetry is a self-consistent one.
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Journal of Chemical Physics; 61; Oct. 15
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Spectrum and energy levels of triply ionized lanthanum /La IV/ (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: PB80-103773 , Optical Society of America; vol. 69
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    NASA TECHNICAL REPORTS
  • 7
    Electronic Resource
    Electronic Resource
    Growth of nickel sulfate in a laboratory-scale fluidized-bed crystallizer (1974)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 20 (1974), S. 678-687 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Growth and dissolution rates of nickel sulfate α-hexahydrate were measured as functions of the concentration driving force in a laboratory-scale fluidized-bed crystallizer for the temperature range 35° to 50°C and the crystal size range 0.5 to 4.0 mm.Dissolution rates at a given temperature and crystal size were first order in the concentration driving force. Growth rates were about one-quarter of dissolution rates and depended on a higher exponent (around 1.3) of the concentration driving force. This exponent was not significantly affected by variations in crystal size, but decreased as temperature increased. The apparent variation of growth rate itself with crystal size at constant temperature was slight. Growth rates were found to be insensitive to solids concentration.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690200408
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  • 8
    Electronic Resource
    Electronic Resource
    Simultaneous melting and freezing in the impingement region of a liquid jet (1980)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 26 (1980), S. 743-751 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An experimental investigation of an impinging water jet freezing on a melting solid surface has been carried out. Attention was focused on the stagnation region of an axisymmetric jet. In the experiment, a water jet was directed upward against the lower end of a meltable rod, having a diameter about twice that of the jet orifice. Solid octane (m.p. - 56.5°C) and solid mercury (m.p. - 38.9°C) served as the meltable materials. A laminar-axisymmetric flow model was developed to describe melting heat transfer in the presence of jet solidification within the impingement region. Measurements of the melting rate and conditions for the onset of jet solidification were found to agree quite well with the values predicted with this model.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690260507
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  • 9
    Electronic Resource
    Electronic Resource
    Surface ablation in the impingement region of a liquid jet (1979)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 25 (1979), S. 630-638 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A theoretical and experimental investigation of a water jet impinging on a melting solid surface has been carried out. Ice, octane, p-xylene, and olive oil served as the meltable solid materials, comprising a Prandtl number range of 5 to 2 800. An available laminar stagnation flow model was utilized to describe melting heat transfer in the jet impingement region. Melting rate measurements were found to agree quite well with the values predicted with this model.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690250409
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of molecular size and configuration on diffusion in microporous membranes (1981)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 27 (1981), S. 952-959 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Effects of molecular size and configuration on hindered diffusion were examined by measuring diffusion of two series of uncharged macromolecules through track-etch membranes with uniform and well-defined pore geometry. At any given Stokes-Einstein radius, diffusivities in small pores were lower for ficoll (crosslinked structure) than for dextran (more nearly linear structure).
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690270611
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