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  • 11
    Electronic Resource
    Electronic Resource
    Luminescence investigation of copper diffusion into cadmium telluride (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 59 (1986), S. 3596-3598 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cu diffusion into CdTe was investigated. Diffusions were carried out at 325 °C for 170 h under vacuum, starting with a surface deposition. The Cu diffusion caused a reduction in the band-edge photoluminescence intensity of the crystals. Hall data indicate that the Cu also inhibited the formation of acceptor states in the lattice during the 325 °C thermal treatment. The luminescence intensity is partially restored by a 2 h, 700 °C anneal under inert gas atmosphere. The spectral features in the exciton region of the spectrum are not significantly changed by the doping, and appear to be dominated by the annealing process itself rather than by the Cu introduced into the crystal. This is in contrast to previously reported data associating Cu doping with increases in the intensity of the 1.5896-eV bound-exciton line. Cathodoluminescence and infrared microscopy indicate that the Cu did not form precipitates or supersaturated areas along defects, as has been previously reported by other workers as the cause of the overall decrease in luminescence intensity with Cu diffusion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336788
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  • 12
    Electronic Resource
    Electronic Resource
    Dielectric measurements of selected ceramic materials at 245 GHz (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 4674-4677 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A double-beam interferometer which incorporates quasioptical components developed in this laboratory has been used to measure near millimeter-wave dielectric properties of a variety of ceramic materials. We report here the results obtained on samples of various standard and advanced ceramics including alumina, silicon nitride, beryllia, and boron nitride. Results are compared with the data obtained by other researchers on similar samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341250
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  • 13
    Electronic Resource
    Electronic Resource
    Influence of stoichiometry on the electrical activity of impurities in Hg(1−x)Cd(x)Te (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 6227-6233 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Elements from groups IB, IIIB, VB, and VIIB have been added to crystals of Hg(1−x)Cd(x)Te grown using the accelerated crucible rotation technique. Assessment on both as-grown and annealed (in Hg vapor) samples was carried out using Hall effect measurements to establish the electrical activity and stability of each dopant. Chemical analysis by atomic absorption spectroscopy and laser scan mass spectrometry determined the total levels of dopants in each crystal. The behavior of dopants in these crystals is compared to that found in Bridgman and epitaxial material and discussed in terms of the stoichiometry of melts and crystals at the growth temperature. It is concluded that group VB and VIIB elements are prevented from occupying Te sites when there is a high Hg vacancy concentration present during growth. Gold, which is inactive in Bridgman material, is found to be an active acceptor in a crystal grown using the accelerated crucible rotation technique. Group IB and IIIB elements are acceptors and donors, respectively, on metal sites irrespective of stoichiometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342079
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  • 14
    Electronic Resource
    Electronic Resource
    Low-frequency admittance measurements on the HgCdTe/Photox SiO2 interface (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 59 (1986), S. 1238-1244 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The complex admittance of an n-type Hg1−xCdxTe/Photox SiO2 interface with x=0.3 has been examined for frequencies ranging between 1 mHz and 4 MHz. The conductance method is used to decompose the total interface state density into three types of components: a valence-band tail, a conduction-band tail, and some well-resolved discrete states. The fixed charge density is low and there is no statistical broadening. The surface valence- and conduction-band edges are both found to be shifted upward in energy relative to their respective bulk values; moreover, the surface has converted to p type. The energy variation of the valence-band tail states response times follows a pattern characteristic of Shockley–Read recombination centers with a constant capture cross section, but the behavior of the conduction-band tail states is more complicated. Evidence is presented that the interface region has a higher Cd concentration than the bulk.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336511
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  • 15
    Electronic Resource
    Electronic Resource
    Status of the Oak Ridge 25 URC Accelerator (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 721-722 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Beam from the accelerator for research was available for a total period of 3900 h last year and unscheduled maintenance time was reduced by a factor of almost 2. An arc discharge tube conditioning test was conducted on the top five units of the accelerator and a test with macropulsed beam was accomplished. The main problems during the year were vacuum leaks and voltage "tics.''
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138896
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  • 16
    Electronic Resource
    Electronic Resource
    Plasma catecholamines and modes of delivery: the relation between catecholamine levels and in-vitro platelet aggregation and adrenoreceptor radioligand binding characteristics. (1985)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 92 (1985), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary. Catecholamines were measured in maternal venous, and mixed umbilical cord blood. Maternal catecholamines were significantly (P〈0·01) reduced by epidural analgesia with a 36% reduction in nor-adrenaline and a 33% reduction in adrenaline. Fetal catecholamines were elevated at birth with a 3–8 fold increase in noradrenaline but not adrenaline during spontaneous vaginal delivery. The lowest fetal catecholamines were obtained in the group delivered under epidural analgesia; lower plasma catecholamines were not associated with adverse respiratory effects. Fetal platelets showed impaired a2-adrenoceptor function with absent aggregatory responses to adrenaline in vitro. The defect in platelet function was unlikely to be related to changes in the number of fetal platelet α-receptors or to changes in receptor affinity for adrenaline, as fetal platelets failed to aggregate to adrenaline from deliveries with high and low cord blood catecholamines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1985.tb01397.x
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  • 17
    Electronic Resource
    Electronic Resource
    UNIVERSITIES, ON BECOMING WHAT THEY ARE NOT (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Financial accountability and management 2 (1986), S. 0 
    Details
    ISSN: 1468-0408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-0408.1986.tb00259.x
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  • 18
    Electronic Resource
    Electronic Resource
    Large tin-E-tin (E = tellurium, selenium, sulfur) angles: tri-tert-butylstannyl chalcogenides (1988)
    s.l. : American Chemical Society
    Inorganic chemistry 27 (1988), S. 4636-4640 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00298a026
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  • 19
    Electronic Resource
    Electronic Resource
    Strategic Interventions Within a No-Treatment Frame (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Family process 24 (1985), S. 0 
    Details
    ISSN: 1545-5300
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Psychology
    Notes: It is the thesis of this paper that there are some problem contexts in which the risk for either no-response or negative effects of therapy are considerably greater than the probability of positive outcomes, despite the competence level of the therapist or special characteristics of the client system. It is these contexts that warrant the inclusion of a no-treatment option among therapists' current range of treatment choices. Rather than turning client systems away in an absolute sense, however, no-treatment is presented as a frame in which therapists are not obligated to help change a problem but may continue to have some form of contact with the client-system. Four no-treatment prescriptions are presented that can be employed strategically either (a) to increase available opportunities for therapist leverage within a problem context, or (b) to amplify competence in pivotal family members when the problem context demands immediate competent responses. Case studies are presented to highlight the contextual information used in making no-treatment decisions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1545-5300.1985.00583.x
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  • 20
    Electronic Resource
    Electronic Resource
    Antagonism of neuromuscular blockade (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 43 (1988), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Glycopyrronium 5 or 10 μg/kg was administered either simultaneously with, or 1 minute before, edrophonium 1 mg/kg in order to antagonise competitive neuromuscular blockade in 80 children. Both doses of glycopyrronium given before the edrophonium resulted in an initial significant (p 〈 0.01) increase in heart rate. Heart rate decreased significantly (p 〈 0.01) in all groups after the edrophonium was given, and only glycopyrronium 10 μg/kg administered before edrophonium prevented a substantial decrease below baseline. Initial heart rate responses to glycopyrronium or edrophonium are rapid, and measurements at intervals of 30 seconds may be necessary to record these changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1988.tb05654.x
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