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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 89 (1985), S. 3338-3343 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 612-614 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Dielectric data on model fast-ionic-conducting glasses are reported at various sub-Tg temperatures. A transformer bridge was used from 100 Hz to 200 kHz, while data between 85 MHz and 2 GHz were obtained by time domain reflectometry. Substantial improvements in the sensitivity and equivalent frequency range of the latter correct previous preliminary results reporting the existence and temperature dependence of apparent dielectric permittivity plateaus in the upper MHz spectral region of glasses.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 45 (1985), S. 0 
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: The binding of [3H]diazepam to cell homogenates of embryonic rat brain neurons grown in culture was examined. Under the conditions used to prepare and maintain these neurons, only a single, saturable, high-affinity binding site was observed. The binding of [3H]diazepam was potently inhibited by the CNS-specific benzodiazepine clonazepam (Ki= 0.56 ± 0.08 nM) but was not affected by the peripheral-type receptor ligand Ro5-4864. The KD for [3H]diazepam bound specifically to cell homogenates was 2.64 ± 0.24 nM, and the Bmax was 952 ± 43 fmol/mg of protein. [3H]Diazepam binding to cell membranes washed three times was stimulated dose-dependently by γ-aminobutyric acid (GABA), reaching 112 ± 7.5% above control values at 10−4M. The rank order for potency of drug binding to the benzodiazepine receptor site in cultured neurons was clonazepam 〉 diazepam 〉 β-carboline-3-carboxylate ethyl ester 〉 Ro15-1788 〉 CL218,872 〉 Ro5-4864. The binding characteristics of this site are very similar to those of the Type II benzodiazepine receptors present in rat brain. These data demonstrate that part, if not all, of the benzodiazepine-GABA-chloride ionophore receptor complex is being expressed by cultured embryonic rat brain neurons in the absence of accompanying glial cells and suggest that these cultures may serve as a model system for the study of Type II benzodiazepine receptor function.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 2384-2389 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We consider the stationary monoenergetic transport equation (the Lorentz model) in a semiinfinite geometry with most general nonmultiplying boundary conditions at the wall x=0, accounting for absorption, specular, diffuse, and "selective'' reflection, or combinations thereof. Performing the numerical study of a (partially) "thermalizing'' wall, we investigate the density profile n(x), the Milne extrapolation length xM, and the space dependent diffusion coefficient D(x) as functions of the accomodation and "selection'' coefficients. The inversed density profile (equivalent to a negative diffusion coefficient) is numerically computed. As a simple analytically solvable example, a discrete velocity model is discussed in the Appendix.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 906-907 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A new test is proposed for approximate kinetic theories of dense fluids: they must reproduce known results concerning the "Kirkwood instability'' (KI). Since analysis of the KI based upon hierarchy truncations has been shown to yield results which depend sensitively upon the choice of truncation, the proposed test is especially appropriate for kinetic theories based upon truncation. Since the KI arises in the theory of freezing, a kinetic theory used for the study of dynamics associated with freezing should also give a good treatment of the KI. It is shown that the Enskog approximation to kinetic theory passes the test. (AIP)
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 2061-2070 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The phenomenon of molecular chattering (a collision between two rigid ovaloids involving two or more impulsive hits) is investigated with emphasis on the importance of these collisions on kinetic theory calculations for dilute molecular systems. To facilitate this analysis, the pseudo-Liouville formalism, commonly employed in the kinetic theory of rigid spheres, is generalized to a form appropriate to rigid ovaloids. From this formalism, we derive a chattering expansion of the bracket integrals, the terms of which successively incorporate higher order chattering sequences. Finally, the results of scattering trajectories between a rigid sphere and a rigid ellipsoid are reported. It is demonstrated that the neglect of chattering sequences leads to large errors when calculating the bracket integrals for realistic model parameters; the errors ranging from ∼1% to as high as ∼200%.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary To investigate the effect of atmospheric turbulence on microwave communication links, temperature and water vapor pressure have been measured and radio refractivity has been computed, during different meteorological conditions, in the atmospheric boundary layer of an urban site. The cospectra between temperature (T) and water vapor pressure (e) have been found to be either negative over the whole range of frequencies, or the low-frequency end of the cospectrum is of opposite sign relative to higher frequency end. In both cases cospectra follow a−5/3 law in the inertial subrange, in agreement with the theoretical predictions. The coherence spectra clearly show that the temperature and humidity fluctuations are highly coherent within the inertial subrange under both convective and stable conditions. The relative contribution ofC T 2 ,C eT andC e 2 to the real refractive index structure parameterC n 2 is examined and discussed.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 49 (1988), S. 277-282 
    ISSN: 1570-7458
    Keywords: Delia radicum ; cabbage root fly ; Evergestis forficalis ; garden pebble moth ; frass ; oviposition ; deterrent ; sinapic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé D. radicum L. a pondu beaucoup moins sur des choux-fleurs pulvérisés avec un extrait (polaire) hydrosoluble d'excréments de chenilles de E. forficalis L. qui avaient consommé différentes crucifères. La pulvérisation des choux-fleurs avec une suspension aqueuse d'éluate de méthanol d'une colonne polyamide et d'éluate aqueux d'une colonne florosile a réduit respectivement de 50 et 66% le nombre d'oeufs pondus. L'analyse chimique des fractions actives révèle la présence d'un acide phénolique isolé et identifié comme acide sinapique (3,5-diméthoxy-4-hydroxycinnamique). Cet acide est absent des excréments des chenilles de Mamestra brassicae L. et Plutella xylostella L. qui avaient consommé la même gamme de crucifères. La pulvérisation des plants de choux-fleurs par une solution aqueuse tamponnée d'acide sinapique a réduit la ponte de D. radicum de 60 à 70%. Dans la nature, l'effet dissuasif persiste sur choux-fleurs 5 jours après la pulvérisation avec une solution aqueuse tamponnée à 10 mM d'acide sinapique.
    Notes: Abstract The cabbage root fly, Delia radicum (L.), was deterred from laying eggs on cauliflower plants sprayed with a water-soluble extract of the frass of caterpillars of the garden pebble moth, Evergestis forficalis (L.), which had fed on a range of cruciferous species. Chemical analysis of the extract revealed the presence of a phenolic acid which was not present in the frass of larvae of two other Lepidoptera (Mamestra brassicae (L.) and Plutella xylostella (L.)) that had fed on the same range of cruciferous plants. The deterrent chemical was isolated and identified as sinapic (3,5-dimethoxy-4-hydroxycinnamic) acid. Spraying cauliflower plants with a buffered solution of the acid in water (0.1, 1 and 10 mM) reduced the numbers of cabbage root fly eggs laid by 60–70%. In field experiments, the deterrent effect persisted 5 days after leaves were sprayed with a buffered, aqueous solution of the acid (10 mM).
    Type of Medium: Electronic Resource
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