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  • 11
    Electronic Resource
    Electronic Resource
    Physical properties of hydrogen sulfide-water mixtures (1969)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 15 (1969), S. 272-275 
    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: Calculations concerning the production of heavy water by the hydrogen sulfide dual-temperature exchange process require precise data on the physical properties of dry hydrogen sulfide and hydrogen sulfide-water mixtures for temperatures between 25 and 170°C., and for pressures between 200 and 340 lb./sq.in.abs. However, data on enthalpy of hydrogen sulfide-water mixtures were not found in the literature, and data published on hydrogen sulfide-water compositions at equilibrium were given at such large intervals of temperature and pressure that they could not be interpolated accurately enough by ordinary means. 1Specific volume and enthalpy of dry, superheated hydrogen sulfide vapor,2Composition of hydrogen sulfide-water vapor and liquid in equilibrium,3Enthalpy of hydrogen sulfide vapor saturated with water vapor,4Enthalpy of water liquid saturated with hydrogen sulfide vapor,5Deuterium distribution constants for vapor-liquid equilibrium.A study was undertaken to express the properties, listed below, with equations suitable for solution on a digital computer and useful in mathematical models of the process.New correlating constants were derived where needed. The equations and typical results are presented in this paper.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690150227
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  • 12
    Electronic Resource
    Electronic Resource
    Sorption and transport of pure gases in random styrene/methyl methacrylate copolymers (1990)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 28 (1990), S. 2079-2102 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Previous work has shown that permeability coefficients for CO2 can increase with pressure for poly(methyl methacrylate) (PMMA); whereas, those for polystyrene decrease slightly as found for many glassy polymers. This response is attributed to a greater propensity for PMMA to be plasticized by CO2. This issue is considered in detail here by examining the behavior of a series of random styrene/methyl methacrylate copolymers in order to learn how the plasticization response varies with MMA content. At low pressure, the sorption and transport of CO2 and other gases in these copolymers depend on copolymer composition in ways expected from simple theories for multicomponent polymers. The change in CO2 permeability coefficient upon pressurization from 1 to 20 atm ranged from -6% for polystyrene to +57% for poly (methyl methacrylate). Furthermore, upon holding at 20 atm of CO2 driving pressure, there was a significant increase in the CO2 permeability coefficient with time for PMMA; whereas this conditioning effect was much smaller for polystyrene. Conditioning and plasticization effects seem to be related to the same molecular causes. The responses change progressively for the copolymers but not directly in proportion to MMA content. The greater effects of CO2 for PMMA are, to a significant extent, but not entirely, due to its much higher level of CO2 sorption compared with that of polystyrene. The results are discussed in terms of relevant theories.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1990.090281114
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  • 13
    Electronic Resource
    Electronic Resource
    Sorption and transport of pure C02 and CH4 in miscible bisphenol chloral polycarbonate/poly (methyl methacrylate) blends (1990)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 28 (1990), S. 2103-2117 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Sorption and permeation behavior of CO2 and CH4 was examined in detail for a series of miscible blends based on bischloral polycarbonate (BCPC) and poly (methyl methacrylate) (PMMA). The former pure polymer exhibits decreases in the permeability coefficients for both CO2 and CH4 as the upstream driving pressure increased as predicted by the dual-mode sorption model. On the other hand, PMMA shows a decrease for CH4 but an increase for CO2. The latter is attributed to plasticization by this more soluble gas. The blends show intermediate behavior. CO2 permeation was examined on pressurization, at constant pressure for two weeks, and then on depressurization. The pattern of behavior progressively deviated between that of BCPC and PMMA as the MMA content of the blends was varied. These trends were contrasted with those previously described for a series of styrene/methyl methacrylate copolymers. Some differences in behavior between the blends and the copolymers were noted when compared at constant MMA content. These results have important ramifications for the design and selection of polymers for membranes to separate the CO2/CH4 gas pair.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1990.090281115
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  • 14
    Electronic Resource
    Electronic Resource
    Kinetics of CO2 conditioning of copolymers and blends containing MMA units (1990)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 28 (1990), S. 2213-2223 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Long-term, high-pressure CO2 permeation experiments were conducted for styrene/methyl methacrylate (SMMA) random copolymers and bischloral polycarbonate/poly (methyl methacrylate) miscible blends to investigate the effects of gas conditioning. The extent and rate of CO2 permeability changes with time increased dramatically with content of MMA units in both series when compared at a constant upstream CO2 pressure of 20 atm. The higher solubility of CO2 in PMMA than polystyrene or the polycarbonate was found to be responsible for a part but not all of this response as shown by isobaric versus isoconcentration experiments. The rate of conditioning cannot be described by a single relaxation time. The conditioning process discussed here seems to be intimately connected to the plasticization process reported earlier for these same systems.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1990.090281204
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  • 15
    Electronic Resource
    Electronic Resource
    Synthesis and Structure of Tris (2′-[2-phenyl-1,3-dioxolano])-chromium(III) (1974)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 57 (1974), S. 1863-1866 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Tris(2′-[2-phenyl-1,3-dioxolano])chromium(III) 3 has been synthesised and has been shown to have the cis (or fac) configuration 3a by X-ray analysis: the Cr—C bond length is 2.037 (10) Å.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19740570635
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  • 16
    Electronic Resource
    Electronic Resource
    Ca45 uptake by dog erythrocytes suspended in sodium and potassium chloride solutionsThis investigation was supported by a P.H.S. grant (H-4155) from the National Heart Institute, Public Health Service. (1961)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 57 (1961), S. 95-100 
    Details
    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1030570206
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  • 17
    Electronic Resource
    Electronic Resource
    The interaction of a submerged axisymmetric shell and three-dimensional internal systems (1994)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 37 (1994), S. 2951-2970 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The problem of axisymmetric shells submerged in an infinite fluid subjected to an arbitrary loading is usually solved by reducing the system to a set of two-dimensional problems. This is accomplished by using Fourier series, thereby uncoupling the circumferential harmonics of the axisymmetric system. Thus, a computationally expensive three-dimensional solution is replaced by a computationally efficient set of two-dimensional solutions without any loss of accuracy. However, with the addition of arbitrary three-dimensional subsystems internal to the submerged axisymmetric shell, the circumferential harmonics become coupled. In this case, the computational advantage attributable to the circumferential Fourier decomposition compared to a fully three-dimensional solution is greatly reduced.This paper introduces a novel method to solve such three-dimensional systems while keeping the circumferential harmonics of the axisymmetric shell uncoupled. This is accomplished by relating the admittance matrix of the three-dimensional substructure, expressed in terms of its connection degrees of freedom, and the response of the empty system to solve for the interaction forces between the axisymmetric shell and the internal system. Using these interaction forces, the response of the full system can be obtained, Thus, the efficiency of the two-dimensional solution is maintained while solving an arbitrary three-dimensional problem. Sample problems illustrating the performance of this approach will be solved.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620371707
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  • 18
    Electronic Resource
    Electronic Resource
    Rotational isomerism in 5-amino-6-(N-methylformamido)-as-triazin-3(2H)-one (1990)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 28 (1990), S. 505-509 
    Details
    ISSN: 0749-1581
    Keywords: 1H DNMR ; Rotational isomerism ; 6-Azapurin-2-ones ; 6-Azapyrimidin-2-ones ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A 1H dynamic NMR study of the hindered rotation in 5-amino-6-(N-methylformamido)-as-triazin-3(2H)-one was conducted. Signals for two rotamers were observed and their proton chemical shifts were assigned. It was found that the rotamer in which the as-triazine ring is cis to the formyl hydrogen predominates. The free energies of activation for hindered rotations about the N —CHO and C —NH2 bonds were determined by 1H NMR line-shape analysis.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260280607
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  • 19
    Electronic Resource
    Electronic Resource
    PDIDENT - a set of programs for powder diffraction phase identification (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 13 (1984), S. 172-179 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: PDIDENT is a collection of interactive computer programs which have been developed as aids for qualitative phase analysis of x-ray powder diffraction data. These FORTRAN IV programs are implemented on a DEC committee on Powder Diffraction Standards (JCPDS) data base is accessed by the programs along with user-created data. The data base (sets 1-32) along with all cross-index files requires 9 Mbytes of storage. The packing of the data base, use of cross-index files and the algorithms and utility of the PDIDENT programs are described.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300130410
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