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  • 1
    Electronic Resource
    Electronic Resource
    A Short Amino Acid Sequence Is Shared by Surface Antigens of Borrelia duttonii, Borrelia hermsii, and Borrelia burgdorferi (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 539 (1988), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1988.tb31877.x
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  • 2
    Electronic Resource
    Electronic Resource
    Intermolecular potential and rovibrational levels of Ar–HF from symmetry-adapted perturbation theory (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 103 (1995), S. 6076-6092 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A two-dimensional intermolecular potential energy surface for Ar–HF has been calculated using the many-body symmetry-adapted perturbation theory (SAPT). The H–F distance was kept constant at its equilibrium value. The interaction energies have been computed using an spdfg-symmetry basis optimized for intermolecular interactions. In addition, the dispersion and induction energies have been calculated in a few progressively larger basis sets to determine the basis set convergence and validity of the asymptotic scaling of those components. Converged results for the dispersion energy have been obtained by using a large basis set containing spdfgh-symmetry orbitals. The ab initio SAPT potential agrees well with the empirical H6(4,3,2) potential of Hutson [J. Chem. Phys. 96, 6752 (1992)], including a reasonably similar account of the anisotropy. It predicts an absolute minimum of −207.4 cm−1 for the linear Ar–HF geometry at an intermolecular separation of 6.53 bohr and a secondary minimum of −111.0 cm−1 for the linear Ar–FH geometry at an intermolecular separation of 6.36 bohr. The corresponding values for the H6(4,3,2) potential are −211.1 cm−1 at an intermolecular separation of 6.50 bohr and −108.8 cm−1 at an intermolecular separation of 6.38 bohr. Despite this agreement in the overall potentials, the individual components describing different physical effects are quite different in the SAPT and H6(4,3,2) potentials. The SAPT potential has been used to generate rovibrational levels of the complex which were compared to the levels predicted by H6(4,3,2) at the equilibrium separation. The agreement is excellent for stretch-type states (to within 1 cm−1), while states corresponding to bending vibrations agree to a few cm−1. The latter discrepancies are consistent with the differences in anisotropies of the two potentials. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470436
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  • 3
    Electronic Resource
    Electronic Resource
    Many-body theory of exchange effects in intermolecular interactions. Density matrix approach and applications to He–F−, He–HF, H2–HF, and Ar–H2 dimers (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 100 (1994), S. 5080-5092 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The first-order exchange energy for the interactions of closed-shell many-electron systems is expanded as a perturbation series with respect to the Møller–Plesset correlation potentials of the monomers. Explicit orbital formulas for the leading perturbation corrections are derived applying a suitable density matrix formalism. The numerical results obtained using the Møller–Plesset perturbation expansion, as well as nonperturbative, coupled-cluster type procedure, are presented for the interactions of He–F−, He–HF, H2–HF, and Ar–H2. It is shown that the correlation part of the first-order exchange energy increases the uncorrelated results by 10% to 30% for the investigated range of configurations. The analysis of the total interaction energies for selected geometries of these systems shows that at the present level of theory the symmetry-adapted perturbation approach correctly accounts for major intramonomer correlation effects and is capable to accurately reproduce the empirical potential energy surfaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467225
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  • 4
    Electronic Resource
    Electronic Resource
    Dispersion energy in the coupled pair approximation with noniterative inclusion of single and triple excitations (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 103 (1995), S. 4586-4599 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The second-order dispersion energy in the coupled-pair (coupled-cluster doubles) approximation has been derived. The coupled-pair amplitudes are subsequently used in a perturbation theory type expression to account for the effects of single and triple excitations. This approach selectively sums to infinite order important classes of intramonomer correlation diagrams resulting in a better theoretical description of the dispersion interaction compared to a finite-order perturbation treatment. Numerical results have been obtained for He2, Ar–H2, Ar–HF, (HF)2, (H2O)2, and He–F− in various geometries and basis sets to illustrate the performance of the nonperturbative versus perturbative treatments of the intramonomer correlation contributions to the energy of the dispersion interaction. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470646
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  • 5
    Electronic Resource
    Electronic Resource
    On the effectiveness of monomer-, dimer-, and bond-centered basis functions in calculations of intermolecular interaction energies (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 103 (1995), S. 7374-7391 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A range of basis sets differing in the location of basis functions has been explored from the point of view of the effectiveness of calculating the electrostatic, induction, dispersion, and exchange components of intermolecular interaction energies. Possible location strategies range from monomer-centered basis sets, through the dimer-centered ones, to sets with functions centered at the intermolecular bond. It is shown that the most effective approach is to use the so-called "monomer plus'' basis sets containing, in addition to monomer-centered functions and bond functions, a small number of functions centered on the interacting partner. Using such basis sets for He2 and (H2O)2 the best values to date have been obtained for several interaction energy components. The conclusions from this work are relevant also for supermolecular calculations of interaction energies. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470309
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  • 6
    Electronic Resource
    Electronic Resource
    An Epizootic of Tanaisia bragai in a Captive Population of Puerto Rican Plain Pigeon (Columba inornata wetmorei) (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 653 (1992), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1992.tb19647.x
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  • 7
    Electronic Resource
    Electronic Resource
    Symmetry-adapted perturbation theory calculation of the Ar–H2 intermolecular potential energy surface (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 98 (1993), S. 1279-1292 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The many-body symmetry adapted perturbation theory has been applied to compute the Ar–H2 potential energy surface. Large basis sets containing spdfgh-symmetry orbitals optimized for intermolecular interactions have been used to achieve converged results. For a broad range of the configuration space the theoretical potential energy surface agrees to almost two significant digits with the empirical potential extracted from scattering and infrared spectroscopy data by Le Roy and Hutson. The minimum of our theoretical potential is εm=−164.7 cal/mol and is reached at the linear geometry for the Ar–H2 distance Rm=6.79 bohr. These values agree very well with corresponding empirical results εm=−161.9 cal/mol and Rm=6.82 bohr. For the first time such a quantitative agreement has been reached between theory and experiment for a van der Waals system that large. Despite such excellent agreement in the overall potential, the exponential and the inverse R components of it agree to only about 20%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.464296
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  • 8
    Electronic Resource
    Electronic Resource
    Dissociability and tRNA content of monosomes produced by dimethylnitrosamine and starvation (1974)
    [s.l.] : Nature Publishing Group
    Nature 247 (1974), S. 311-313 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A single dose of dimethylnitrosamine (Fig. la) or 72 h of starvation (Fig. Ic) completely disaggregated liver polysomes into SOS monosomes which dissociated into 40S and 60S subunits in 0.3 M KC1 (Fig. 16 and d). To characterise these ribosomes further, RNA extracted from monosomes was analysed by ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/247311a0
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  • 9
    Electronic Resource
    Electronic Resource
    Eine Technik, die dazu dient Polyester Schmutz-abweisung zu verleihen sowie die Fähigkeit Wiederablagerung von Schmutz zu verhindern und Feuchtigkeit zu transportieren (1978)
    Springer
    Colloid & polymer science 256 (1978), S. 728-728 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01784603
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of plant growth regulators in soil on clover growth and nitrogen fixation (1985)
    Springer
    Plant growth regulation 3 (1985), S. 71-78 
    Details
    ISSN: 1573-5087
    Keywords: Clover ; Rhizobium ; nitrogen-fixation ; soil-residues ; growth regulators
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung Die Einflüsse der Wachstumsregulatoren Barleyquat B, New ‘5c’, Cyocel, Cerone, Terpal und Paclobutrazol auf das Wachstum von Rhizobium trifolii in vitro, auf das Wachstum und Knöllchenbildung des Klees und auf die symbiotische N2-Bindung wurden bestimmt. Paclobutrazol im Boden führte zu einer bedeutenden Gewichtsverminderung der Kleepflanzen, blieb aber ohne Einfluß auf die Knöllchenbildung in bezug auf die Pflanzengröße. Paclobutrazol reduzierte die Menge Stickstoff gebunden pro Pflanze, (gemessen mittels Acetylenreduktion) wenn er im Boden in einer Konzentration enthalten war, die anwesend wäre, wenn eine einzige Applikation von 0,25 kg Wirkstoff.ha−1 unverändert und gleichmäßig in den oberen 5 cm des Bodens verteilt bleiben würde. Eine Bodenkonzentration gleich jener von einer Applikation von 0,125 kg Wirkstoff.ha−1 hatte keine signifikante Wirkung auf die N2-Bindungsleistung pro Pflanze, und das Bindungstempo in bezug auf das Pflanzengewicht nahm zu. Offensichtlich war die Hemmwirkung auf das Pflanzenwachstum größer als auf die symbiotische N2-Bindung. Wahrscheinlich wird keine der Verbindungen die N2-Fixierung des Klees im Freiland beeinträchtigen, wenn sie einmal vorher auf eine Getreidearte in der üblichen Aufwandmenge appliziert werden.
    Notes: Abstract Effects of the growth regulators Barleyquat B, New ‘5c’ Cyocel, Cerone, Terpal and paclobutrazol on Rhizobium trifolii in vitro, on growth and root nodulation of clover grown in pots and on symbiotic nitrogen fixation were measured. Paclobutrazol in soil markedly reduced the weight of clover plants but had no effect on nodulation in relation to plant size. Paclobutrazol decreased the amount of nitrogen fixed per plant (measured by acetylene reduction) when present in soil at a concentration which would result from a single direct application at 0.25 kg a.i. ha−1 remaining unchanged and evenly distributed in the top 5 cm of soil. A concentration in soil equal to that from an application at 0.125 kg a.i. ha−1 had no significant effect on the rate of nitrogen fixation per plant and the rate relative to plants weight increased. It was evident that the inhibitory effect on plant growth was greater than on symbiotic nitrogen fixation. The other PGR's had virtually no effect on clover. None of the compounds seems likely to affect nitrogen fixation by a subsequent clover crop in the field if previously applied to a cereal crop once at typical rates of application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00123548
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