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  • 11
    Electronic Resource
    Electronic Resource
    Photoluminescence studies of silicon-on-insulator substrates formed by oxygen implantation (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 465-467 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Photoluminescence spectroscopy has been used to study silicon-on-insulator substrates formed by oxygen implantation. Samples having post-implantation anneals at 1200 and 1300 °C were investigated. The dislocation-related D-line emission is observed in all the samples, but with lower intensity in the samples annealed at the higher temperature, indicative of their superior crystal quality. Group V contaminants in some samples were identified from their excitonic emission. Additional low-temperature anneals at 450 and 750 °C significantly increased the intensity of the excitonic emission from the samples, and in addition, emission from thermal donors was also observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99445
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  • 12
    Electronic Resource
    Electronic Resource
    Formation of buried layers of β-SiC using ion beam synthesis and incoherent lamp annealing (1987)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 2242-2244 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is demonstrated that well-defined buried layers of β-SiC can be grown epitaxially within a silicon substrate. This structure is formed by implanting high doses of carbon ions (〉3×1017 C+ cm−2) at 200 keV into a (100) single-crystal silicon which is maintained at a temperature of approximately 550 °C. During the subsequent anneal at 1405 °C for 90 min redistribution of the implanted species occurs, enabling the formation of a buried layer of β-SiC overlain by high-quality single-crystal silicon (χmin=4.1%).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.98953
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  • 13
    Electronic Resource
    Electronic Resource
    X rays from z-pinches on relativistic electron-beam generators (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 1 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This review summarizes recent experimental data on imploding z-pinches and their radiation output, and gives an overview of theoretical issues concerning radiation production in the pinch plasma. A z-pinch plasma is created when the current from a fast, powerful electrical generator compresses and heats a small amount of material between the electrodes. The hot, dense plasma emits copious amounts of radiation extending from the visible to the x-ray region. With a 10-TW electrical discharge the radiative power may be a few TW, with an energy per pulse of up to tens of kilojoules. Our interest is mainly in the photons with energy around 1 keV, which are useful in x-ray lithography, microscopy, surface studies, and other applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341808
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  • 14
    Electronic Resource
    Electronic Resource
    Profiling of inhomogeneous carrier transport properties with the influence of temperature in silicon-on-insulator films formed by oxygen implantation (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 3199-3203 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The nonhomogeneous distribution of the carrier transport properties in silicon on insulator thin films synthesized by oxygen implantation are determined using gate-controlled p-type Hall devices. The conductivity, Hall effect, and capacitance were measured between 77 and 300 K as a function of the gate voltage and then differentiated to obtain depth profiles. The hole mobility is high and nearly constant in the top 100 nm of the film but drops rapidly in the region containing implantation-induced defects. The very good quality of the top layer, similar to that of bulk Si, is confirmed by the temperature behavior of both the mobility and the ionized impurity concentration at various depths in the film. Acoustic phonon scattering is found to prevail above 120 K and Coulombian scattering below. A difference between the profile of the total number of holes and that of the mobile holes is observed at low temperatures and explained in terms of long-range potential fluctuations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337737
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  • 15
    Electronic Resource
    Electronic Resource
    SYNAPTOSOMAL TYROSINE HYDROXYLATION: AFFINITY FOR OXYGEN (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 28 (1977), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— Crude striatal synaptosomes were used to determine the affinity of brain tyrosine 3-mono oxygenase for oxygen. The rate of tyrosine hydroxylation was determined at several different oxygen concentrations using L-[14C]tyrosine as substrate and measuring the [14C]DOPA formed in the presence of a decarboxylase inhibitor. The accumulation of [14C]tyrosine by synaptosomes was unaffected by incubation in nitrogen or 2.3% oxygen. Preincubation in nitrogen for up to 4 h did not impair the ability of synaptosomes to hydroxylate tyrosine when returned to air. Furthermore, pre-incubation in either nitrogen or air produced similar changes in the ultrastructural appearance of the synaptosomes and mitochondria in the crude preparation used in these studies. Thus tyrosine hydroxylation in these synaptosomes appeared to reflect tyrosine 3-mono oxygenase activity over a range of oxygen concentrations. The apparent Km for oxygen was 2 × 10−5 at pH 6.7 and 7.4. The apparent Km was not significantly altered by the addition of Ca2+, and was slightly increased in the presence of N6-mono-butyryl cyclic AMP or high K+. These data are consistent with the hypothesis that the availability of oxygen may limit catecholamine synthesis in the intact rat brain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1977.tb10667.x
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  • 16
    Electronic Resource
    Electronic Resource
    BRAIN TYROSINE HYDROXYLATION: ALTERATION OF OXYGEN AFFINITY IN VIVO BY IMMOBILIZATION OR ELECTROSHOCK IN THE RAT (1976)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 27 (1976), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— The rates of brain tyrosine and tryptophan hydroxylation, estimated in vivo from the accumulation of DOPA and 5-hydroxytryptophan after the administration of a decarboxylase inhibitor, appear dependent on the availability of oxygen as a substrate. During two types of physical stress, electroshock and curare-immobilization, the rate of brain tyrosine hydroxylation was greater than in unstressed controls and was not significantly decreased when the stresssed animals were made hypoxic. The loss of oxygen dependence by brain tyrosine hydroxylation during stress was observed in several brain regions and was not associated with alterations in the concentrations of brain tyrosine. tryptophan, serotonin, dopamine or norepinephrine. The rate of brain tryptophan hydroxylation was not affected by stress and remained oxygen dependent. The increase in catecholamine synthesis during stress appears to be the result of increased catecholaminergic nerve impulse flow. These experiments are consistent with the hypothesis that during neuronal stimulation an allosteric change in tyrosine hydroxylase increases the affinity of the enzyme for oxygen allowing greater catecholamine synthesis despite limiting concentrations of this substrate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1976.tb01566.x
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  • 17
    Electronic Resource
    Electronic Resource
    Rules in industrial relations theory: a discussion (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Industrial relations journal 6 (1975), S. 0 
    Details
    ISSN: 1468-2338
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-2338.1975.tb00573.x
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  • 18
    Electronic Resource
    Electronic Resource
    PLASMA OESTRIOL AND HUMAN PLACENTAL LACTOGEN MEASUREMENTS IN PATIENTS WITH HIGH RISK PREGNANCIES (1976)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 83 (1976), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Maternal plasma oestriol and human placental lactogen (HPL) were measured serially in 383 at-risk pregnancies. Eighty-five infants were growth retarded and 122 developed fetal distress or neonatal asphyxia. Of the infants whose mothers had either abnormal plasma oestriol or HPL levels, 58 per cent were growth retarded, while 65 and 73 per cent in each group respectively developed fetal distress. The incidence of fetal complications when both plasma oestriol and HPL were abnormal was consistently greater than 66 per cent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1976.tb00815.x
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  • 19
    Electronic Resource
    Electronic Resource
    FAILURE TO SUPPRESS ADRENAL FUNCTION IN CONGENITAL ADRENAL HYPERPLASIA (2 1 -HYDROXYLA SE DEFICIENCY) THREE CASE REPORTS (1978)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 85 (1978), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Three patients, aged 14, 16, and 32 years respectively, with congenital adrenal hyperplasia (21 -hydroxylase deficiency) are described. Excessive adrenal activityand ACTH secretion could not be suppressed with doses of corticosteroids sufficient to cause iatrogenic Cushing's syndrome, even though part of the steroid dosage was administered in the late evening. The resistance to feed-back suppression was of the same order as that seen in Cushing's syndrome. Adrenalectomy was performed in the 16-year-old girl, and was followed by a menarche. Adrenalectomy was considered inadvisable in the other two patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1978.tb15861.x
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  • 20
    Electronic Resource
    Electronic Resource
    Hydrogen bonding in carboxylic acid adlayers on Pd(111): evidence for catemer formation (1989)
    s.l. : American Chemical Society
    Langmuir 5 (1989), S. 1299-1309 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00090a004
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