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  • 1
    Electronic Resource
    Electronic Resource
    Animal Feed Supplements, Detoxication of Tung Meal (1956)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 4 (1956), S. 67-68 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf60059a007
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  • 2
    Electronic Resource
    Electronic Resource
    The adsorption conformation of chemisorbed pyridine on the Cu(110) surface (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 114 (2001), S. 1414-1419 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The adsorption conformation of pyridine on the Cu(110) surface has been studied using temperature programmed desorption, low energy electron diffraction, and electron stimulated desorption ion angular distribution techniques. Pyridine adsorbs on Cu(110) via the nitrogen lone pair orbital. The molecular symmetry axis is perpendicular to the surface. At low coverage, the aromatic ring plane of adsorbed pyridine is oriented parallel to the 〈001〉 plane, which is perpendicular to the close-packed copper atom rows on Cu(110). At high coverage, the aromatic ring plane of pyridine is azimuthally rotated by 25 (±5)° away from the 〈001〉 direction as a result of an attractive contribution from nonparallel aromatic ring–aromatic ring interactions superimposed on the overall repulsive adsorbate–adsorbate interactions. The zero coverage desorption activation energy of pyridine on Cu(110) is 0.97 eV and the repulsive adsorbate–adsorbate interaction energy is 0.16 eV/monolayer. At near saturation coverage, (5×3) and (4×3) long-range ordered structures were observed. It is proposed that the adsorbed pyridine on the Cu(110) surface forms a chain structure of nonparallel normally-oriented pyridine rings arranged in a chevron pattern at monolayer saturation coverage. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1329671
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  • 3
    Electronic Resource
    Electronic Resource
    Erratum: "The adsorption conformation of chemisorbed pyridine on the Cu(110) surface" [J. Chem. Phys. 114, 1414 (2001)] (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 114 (2001), S. 8722-8722 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1368661
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  • 4
    Electronic Resource
    Electronic Resource
    Thermal excitation of rotation of the methyl group in chemisorbed acetate on Cu(110) (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 112 (2000), S. 3351-3357 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The adsorption of acetic acid on the Cu(110) surface has been investigated by the time-of-flight electron stimulated desorption ion angular distribution technique by observing H+(D+) ions from the methyl groups. The activated conversion of acetic acid to acetate has been witnessed by observing the formation of oriented acetate species. It has been found that the activation energy for acetate formation varies from 0.39±0.06 eV at low coverage to 1.1±0.1 eV at high coverage, possibly because of acetic acid stabilization at high coverage by hydrogen bonding. Methyl groups are oriented with one C–H bond azimuthally directed in the 〈11¯0〉 direction. At high coverage, the methyl groups are tilted slightly in the 〈11¯0〉 direction due to repulsive acetate–acetate interactions. The activated rotation of the methyl groups on adsorbed acetate is clearly observed by the electron stimulated desorption ion angular distribution method and the barrier height for CH3 rotation is estimated to be 12±6 meV, and for CD3 groups to be 7±4 meV. The small inverse D isotope effect is postulated to be caused by higher amplitude CH3 wagging motions compared to CD3, which permit slightly higher hyperconjugation for CH3 as this group interacts with the anchoring carboxyl group. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.481594
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  • 5
    Electronic Resource
    Electronic Resource
    AMBER force field parameters for the trimethylanilinium cation
    Amsterdam : Elsevier
    Bioorganic & Medicinal Chemistry Letters 2 (1992), S. 291-294 
    Details
    ISSN: 0960-894X
    Keywords: AMBER force field ; Ab initio calculations ; Anilinium cation ; Hydrophobic cavity ; Molecular modeling
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0960-894X(01)80202-X
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  • 6
    Electronic Resource
    Electronic Resource
    Theoretical modeling of the diphosphene (HP=PH) ligand
    Amsterdam : Elsevier
    Inorganica Chimica Acta 77 (1983), S. L61-L62 
    Details
    ISSN: 0020-1693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0020-1693(00)82567-0
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  • 7
    Electronic Resource
    Electronic Resource
    Simple function for a complex domain configuration : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5752-5754 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A complex domain configuration found in an iron whisker can be generated by a function with three parameters. The configuration is generated by passing a current along the axis of a {100} whisker with a square cross section. It has four domains in which the magnetization circulates about a central domain magnetized along the z axis. There are four {110} 90° walls and four {100} 90° walls separating these domains. Two of the parameters are known a priori from micromagnetics: a1 describes type I 90° walls between two domains with in-plane magnetization; and a2 describes type II 90° walls between the domains with in-plane magnetization and the central domain with the magnetization out of the plane. The third parameter h, which determines the width of the central domain, is adjustable to minimize the total micromagnetic energy in response to magnetic fields. The magnetization pattern is generated from a vector potential A(x,y)zˆ. Calculating Ms curl A(x,y)zˆ produces Mx and My. Then Mz is found from M2x+M2y+M2z=M2s. The potential has four parts: A(x,y)=Ax+Az+Ah+Ac, where Ax and Ay are the same function (with x and y interchanged) used to create the in-plane domains and the type I walls, Ah generates the type II walls, and Ac describes the outer corners. The resulting magnetization is divergence free. The analytic functions are convenient for calculation of the magnetic response to applied fields. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362176
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  • 8
    Electronic Resource
    Electronic Resource
    Iron whisker domain patterns imaged by garnet films : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 6051-6053 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Bismuth doped yttrium iron garnet thin films formed on the surfaces of a gadolinium gallium garnet substrate are used as magneto-optical indicators for quantitative studies of the micromagnetics of an iron whisker. The method does not require image processing. A field applied perpendicular to the whisker axis splits a 180° domain wall into two 90° sections slightly separated by a section magnetized in the direction of the perpendicular field. A field along the axis of the whisker has a similar effect. Where the region between the two split 90° sections intersect the surface, there is a magnetic charge that strongly affects the domain pattern of the indicator film. More generally, domain walls become visible because the local internal susceptibility is greater at the walls than in the domains. The magneto-optical indicator can be used to measure both susceptibilities. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362088
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  • 9
    Electronic Resource
    Electronic Resource
    Tunable bistability from magnetostriction (abstract) : The 6th joint magnetism and magnetic materials (MMM)-intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 7031-7031 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: When a current passes along the axis of a [100] iron whisker in the presence of a field along the same axis, the magnetization in a central domain points along the field direction while the mangetization in four domains surrounding the central domain circulates about the axis, see Fig. 1. The size of the central domain grows with applied field, which overcomes the effect of the field from the current and the magnetostriction that favor the collapse of the central domain to an irreducible core. Depending on the current, the growth of the central domain can be a continuous or discontinuous process. At certain fields the energy is a double-well function of the size of the central domain, which determines the magnetization. The size of the energy barrier can be made arbitrarily small by suitable choice of the current. It is the ability to adjust the size of the barrier in such a clearly defined system that makes this an attractive experimental approach to understanding the role of fluctuations in magnetization processes. This structure has been verified using measurements of ac susceptibility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358078
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  • 10
    Electronic Resource
    Electronic Resource
    Magnetization in current carrying iron whiskers (abstract) : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 5713-5713 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The structure deduced for a 〈100 〉 iron whisker carrying a current along its axis in the presence of a magnetic field is shown in Fig. 1. An analytic model of the ac response is obtained by considering the competition of exchange, anisotropy and magnetostatic energies. For the analytic model the magnetization is assumed to point either along an easy axis in the plane or out of the plane everywhere except in the walls where the energies of the walls per unit area are assumed to be independent of field. It is argued that the energy scales with that of the central cross section subjected to demagnetizing fields that depend on the magnetization along the axis in that cross section. The model is shown to account for the ac susceptibility of a current carrying whisker. The calculation is refined by considering a pattern that is divergenceless. The pattern is generated by taking the curl of a vector potential to produce the components in the plane and adding a component perpendicular to the plane to conserve the magnitude. The vector potential has a single component given by Az = Msq cothB/q[(1/(square root of)2) (q/{a ln [cosh(x/a)cosh (y/a)] })q/B − Ac[(x/a), (y/a)], where the parameter q determines the size of the central region of Fig. 1, the constant a sets the scale for the 90° domain walls between the four outer domains, and B sets the scale for the 90° domain wall between the central region and the outer domains. The term Ac is added to turn the magnetization along the axis of the whisker in each corner of the central cross section. The only parameter in Ac is a. The total energy is minimized for parameters q, B, and a. The field dependence of q accounts for the magnetic behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355592
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