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  • 1
    Electronic Resource
    Electronic Resource
    ZnSe homoepitaxial layers grown at very low temperature by atmospheric pressure metalorganic vapor-phase epitaxy (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 2728-2733 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: ZnSe homoepitaxial layers with high crystalline quality were grown on (100) ZnSe substrates (grown by the iodine vapor transport method) between 190 and 250 °C. The surface morphologies of homoepitaxial layers (homoepilayers) grown below 250 °C were all mirrorlike. The concentration of self-activated (SA) centers is related to the growth temperature. The band-edge photoluminescence (PL) intensity increases drastically with increasing temperature from 190 up to 210 °C, decreases above 210 °C, and the SA-PL intensity increases monotonically as the growth temperature increases. The mechanism of suppressing the occurrence of SA centers below 250 °C is assumed that the concentration of Zn vacancies diffused from the highly iodine-doped ZnSe substrates into the ZnSe homoepilayers reduces at this temperature region. The SA-PL intensity of the ZnSe homoepilayer with the strongest band-edge emission (grown at 210 °C) is the same or weaker than that of the best ZnSe heteroepitaxial layer (heteroepilayer). Below 200 °C, the FWHM of the ZnSe (400) diffraction is 14 arcsec which is the best value we have ever obtained, though the growth temperature seems to be too low to maintain the crystalline quality. The comparison on the crystalline quality with the ZnSe heteroepilayers is discussed in detail from the viewpoints of the epitaxial growth mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342760
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  • 2
    Electronic Resource
    Electronic Resource
    Ion channeling study of the lattice disorder in neutron irradiated GaP (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 2352-2354 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The lattice disorder in GaP produced by fast neutrons with a fluence of 2.1×1018 cm−2 has been investigated with 1.5 MeV 4He+ channeling. The slight increase in the 〈111〉 aligned yield for irradiated crystals indicates that each primary knock-on (PKO) produces approximately 7×102 displaced atoms. Channeling studies also show a spread distribution of randomly located defects imbedded in the lattice structure. On the other hand, P antisite (PGa) defects produced by neutron irradiation are ∼2 per PKO. Irradiated samples also show a volume expansion of 0.13%. It is suggested that the lattice expansion mainly induced by vacancy–interstitial clusters arises from the displacement atoms rather than PGa defects. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371054
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  • 3
    Electronic Resource
    Electronic Resource
    Relation between the substitutional fraction and electrical activation of carbon in heavily C-ion implanted GaAs (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 6926-6928 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nuclear reaction analysis (NRA), using the 12C(d,p)13C reaction, in conjunction with Rutherford backscattering spectrometry (RBS) in the channeling geometry was used to evaluate the substitutional fraction of C in (100)-oriented semi-insulating GaAs implanted with 12C ions to a dose of 5×1016 cm−2. The substitutional fraction of the implanted 12C evaluated by NRA was 19% in the samples annealed at 600 °C, whereas the electrical activation rate of the same sample was 2.1%, as measured by the van der Pauw method. It is suggested that a possible origin of this discrepancy is the compensating centers such as As vacancy (VAs) and/or VAs-CAs complex introduced in the annealing processes. This was supported by both the surface precipitation of As observed by Raman scattering and the enhancement of the surface peak in RBS-channeling yield which was measured by using a 1.5 MeV 4He+-ion beam. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370293
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  • 4
    Electronic Resource
    Electronic Resource
    Dynamics of concentration fluctuations for butylcellosolve in water (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 2718-2722 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The coexistence curve, the shear viscosity, and the angular and the spectral distribution of scattered light have been measured for butylcellosolve in water near its lower critical mixing point. We have examined the validity of the pseudospinodal concept for the interpretation of the diffusion coefficient near the critical point. The critical exponents obtained with the assumption of the pseudospinodal agree with the recent experimental and the theoretical values. The universal dynamic amplitude ratio R=1.03±0.06 obtained in the present work is in disagreement with the value R=1.2 calculated from the renormalization-group theory but in good agreement with R=1.03 of the prediction by Burstyn et al. The diffusion coefficient as a function of temperature and concentration is well represented in terms of a scaled function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448269
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  • 5
    Electronic Resource
    Electronic Resource
    The Role of Glutamate in the Neurotoxic Effects of Methamphetamine (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 801 (1996), 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.1749-6632.1996.tb17452.x
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of temperature on the deformability of a lamprey, Entosphenus japonicus, and Pacific salmon, Oncorhynchus keta, red blood cells, studied using a modified filtration method (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 33 (1988), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The rates of filtration through Nuclepore filters (5 or 8 μm) of blood from lampreys and Pacific salmon have been studied using a method which visualizes the flow pattern. From these measurements, passage times for single red blood cells have been calculated and serve as an index of their deformability. The deformability increases as temperature is raised in vitro, but even at 5°C the passage time of lamprey blood is relatively rapid. The increase in deformability with a rise in temperature is small relative to that found in other fish such as yellowtail and carp.The distribution of red cell volumes has shown the presence of a secondary peak for salmon blood taken during surgery which is reduced following recovery, the main peak being at a lower volume.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1988.tb05544.x
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  • 7
    Electronic Resource
    Electronic Resource
    Dynamic Properties of the Phospholipid Bilayer of the Erythrocyte Membrane in the Presence of α-Tocopherol (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 570 (1989), 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.1749-6632.1989.tb14941.x
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  • 8
    Electronic Resource
    Electronic Resource
    Activity of tuberoinfundibular dopaminergic neurons and concentrations of serum prolactin in the rat following lithium administration (1988)
    Springer
    Psychopharmacology 94 (1988), S. 92-96 
    Details
    ISSN: 1432-2072
    Keywords: Dopamine ; Prolactin ; Lithium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Maintenance of rats on a lithium-containing diet for 3–21 days resulted in a suppression of prolactin (PRL) secretion in vivo and in vitro. Lithium treatment also resulted in an increase in the activity of tuberoinfundibular dopaminergic neurons, as evidenced by an increased accumulation of dihydroxyphenylalanine (DOPA) in the median eminence after inhibition of DOPA decarboxylase and an increased concentration of dopamine in the anterior pituitary gland. The accumulation of DOPA in the neurointer-mediate lobe of the pituitary gland, the prefrontal cortex, the striatum and the nucleus accumbens was also enhanced by lithium treatment. It is concluded that lithium treatment enhances the synthesis of dopamine in many brain regions and that an increased activity of tuberoinfundibular dopaminergic neurons results in an enhanced inhibitory control of PRL secretion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00735887
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  • 9
    Electronic Resource
    Electronic Resource
    Constitutive expression of the neutral PR-5 (OLP, PR-5d) gene in roots and cultured cells of tobacco is mediated by ethylene-responsive cis-element AGCCGCC sequences (1998)
    Springer
    Plant cell reports 18 (1998), S. 173-179 
    Details
    ISSN: 1432-203X
    Keywords: Key words Callus ; ERF (EREBP) ; Osmotin-like protein ; Root ; Tobacco
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The constitutive accumulation of tobacco neutral PR-5 (osmotin-like protein; OLP, PR-5d) in roots and cultured cells was studied in transgenic tobacco plants harboring the OLP promoter::GUS gene. This construct showed strong β-glucuronidase expression in vascular tissues and cortex of roots as well as in cultured cells. Analysis using a mutated promoter showed that ethylene-responsive elements (AGCCGCC) were necessary for constitutive expression in roots and cultured cells. An electrophoretic mobility shift assay indicated that ERF3 (EREBP3), an ethylene-responsive-element-binding factor that was reported to be expressed in roots and in cultured cells as well as in ethephon-treated leaves, could bind to the AGCCGCC sequences of the OLP gene. These findings suggest that AGCCGCC sequences and ERFs mediate the constitutive expression of the OLP gene in roots and cultured cells of tobacco.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002990050552
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  • 10
    Electronic Resource
    Electronic Resource
    Marked canal stenosis at the level of the atlas (1989)
    Springer
    Neuroradiology 31 (1989), S. 346-348 
    Details
    ISSN: 1432-1920
    Keywords: Cervical canal stenosis ; Cranio-cervical junction ; Spinal cord atrophy ; Posterior laminectomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 38-year-old man with severe canal stenosis at the level of the atlas is reported. The clinical manifestations were muscular weakness and wasting of the upper limbs and spastic paresis of the lower limbs, which all progressed slowly. The atlas was hypoplastic and its retrodental space was narrow. The spinal cord was markedly compressed between the odontoid process and the posterior arch of the atlas. The clinical manifestations improved after a posterior laminectomy of the atlas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00344180
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