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  • 1
    Electronic Resource
    Electronic Resource
    Determination of arsenic diffusion parameters by sulfur indiffusion in gallium arsenide (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 7045-7050 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Indiffusion profiles of sulfur in gallium arsenide were determined by secondary ion mass spectroscopy. In order to evaluate the shape of the profiles, a set of coupled reaction–diffusion equations was solved numerically. From the simulated nonequilibrium indiffusion profiles of sulfur, which diffuses into gallium arsenide via the kick-out mechanism, both the diffusion coefficient and the equilibrium concentration of arsenic self-interstitials were simultaneously determined. Transmission electron microscopy revealed that, due to an arsenic supersaturation, extrinsic dislocation loops have formed. The Fermi-level effect is more pronounced at lower diffusion temperatures and provides an additional driving force for the loop formation, agreeing well with the occurrence of larger faulted loops at a diffusion temperature of 950 °C rather than at 1100 °C. The complex behavior of the sulfur indiffusion can be quantitatively described by taking into account extended defects. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1325383
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  • 2
    Electronic Resource
    Electronic Resource
    Simian liver alcohol dehydrogenase: isolation and characterization of isozymes from Macaca nemestrina (1985)
    s.l. : American Chemical Society
    Biochemistry 24 (1985), S. 6474-6479 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00344a025
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  • 3
    Electronic Resource
    Electronic Resource
    Government funding of research in magnetism: A panel discussion (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 3494-3496 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A panel discussion between representatives of four major government funding agencies (Air Force Office of Scientific Research, Department of Energy, National Science Foundation, and Office of Naval Research) and the magnetism research community was held concerning the role of government research funding in the field of magnetism. The program consisted of presentations by each of the four agency representatives and a response by a representative of the university research community. The floor was then opened for comments and questions by the audience. This article summarizes both the prepared presentations and the response of the audience.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338736
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  • 4
    Electronic Resource
    Electronic Resource
    Structure and optical properties of Si/InAs/Si layers grown by molecular beam epitaxy on Si substrate (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 2677-2679 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Epitaxial Si/InAs/Si heterostructure grown on (001) Si substrate by molecular beam epitaxy and annealed at 800 °C was investigated by high resolution transmission electron microscopy. Extensive interdiffusion leads to the formation of an InAs solid solution in the Si cap layer. Additionally, InAs-enriched regions with extensions of ∼6 nm, which exhibit two kinds of ordering are observed. The ordering of InAs molecules has occurred, respectively, in (101) and (101¯) planes inclined and (110) and (11¯0) planes parallel to the [001] growth direction. It is attributed to the energy gain from the reduced number of mixed Si–As and Si–In bonds. The sample show photoluminescence in the 1.3 μm region, which is tentatively attributed to the recombination of excitons localized in the ordered regions. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.126441
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  • 5
    Electronic Resource
    Electronic Resource
    White cell count and intensive care unit outcome: rethinking the vocabulary (2004)
    Oxford, UK : Blackwell Science Ltd
    Anaesthesia 59 (2004), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.2004.03591.x
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  • 6
    Electronic Resource
    Electronic Resource
    TREOR, a semi-exhaustive trial-and-error powder indexing program for all symmetries (1985)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 18 (1985), S. 367-370 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: An indexing program, TREOR, mainly based on trial-and-error methods is described. The program contains separate routines for cubic, tetragonal, hexagonal, orthorhombic, monoclinic and triclinic symmetries. Ten years usage has been analysed to improve the original program. For monoclinic indexing a specific short-axis test has been developed. The over-all success rate of the program has been found to be better than 90%, and considerably more for orthorhombic and higher symmetries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889885010512
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  • 7
    Electronic Resource
    Electronic Resource
    Structure of a copper(III) periodate complex (1988)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 597-599 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010827018701134X
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  • 8
    Electronic Resource
    Electronic Resource
    Structures and phase transitions of B-Ta2O5 and Z-Ta2O5: two high-pressure forms of Ta2O5 (2000)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. 659-665 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A sample of Ta2O5, ditantalum pentaoxide, heat-treated in a `toroid'-type high-pressure chamber at P = 8 GPa and T = 1470 K, was studied by X-ray powder diffraction and high-resolution transmission electron microscopy (HRTEM). Two high-pressure modifications of Ta2O5, isostructural with B-Nb2O5 and Z-Nb2O5, were identified from the X-ray powder pattern. Both structures were refined by the Rietveld method from the X-ray diffraction data: B-Ta2O5, a = 12.7853 (4), b = 4.8537 (1), c = 5.5276 (2) Å, β = 104.264 (2)°, V = 332.45 Å3, Z = 4, space group C2/c; Z-Ta2O5, a = 5.2252 (1), b = 4.6991 (1), c = 5.8534 (1) Å, β = 108.200 (2)°, V = 136.53 Å3, Z = 2, space group C2. The Z-Ta2O5 modification is new. The Ta atoms are six-coordinated in B-Ta2O5 and seven-coordinated in Z-Ta2O5. The two structures are closely related, which makes an intergrowth and a transformation between them possible. An idealized model of the intergrowth structure has been given. The HRTEM study showed defect-rich B-Ta2O5 crystals, which could be interpreted as an intergrowth between the B-Ta2O5 and Z-Ta2O5 phases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768100005462
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  • 9
    Electronic Resource
    Electronic Resource
    Acute and long-term effects of low-density lipoprotein apheresis on the serum concentrations of vitamins E and A (1988)
    Springer
    Journal of molecular medicine 66 (1988), S. 123-128 
    Details
    ISSN: 1432-1440
    Keywords: LDL apheresis ; Vitamin E ; Vitamin A ; α-Tocopherol ; Retinol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Serum α-tocopherol and retinol concentrations were followed in four heterozygous adults and one homozygous child with familial hypercholesterolemia being treated by regular low-density lipoprotein (LDL) apheresis. Approximately 50% of plasma α-tocopherol was eliminated during a single apheresis procedure in the heterozygous adults, while a complete elimination of this vitamin along with LDLs was observed in the homozygous child. Absolute losses of α-tocopherol amounted to 13.4–22.5 mg/apheresis and are equivalent to the recommended dietary intake for 1.5 to 2 days. Despite these losses, no changes were observed either in serum α-tocopherol levels or in the ratio of α-tocopherol/total serum lipids after 12 months regular apheresis treatment. Serum retinol concentrations only showed a small decrease on apheresis, there being apparently no specific elimination of this vitamin. The absolute losses ranged from 42–422 µg/apheresis and were, therefore, much lower than the recommended dietary intake of the equivalent of 1500 µg retinol/day. It is concluded that no extra supplementation of these vitamins is required during LDL-apheresis therapy, although it may be advisable to monitor vitamin E status in patients on long-term, intensive therapy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01774226
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  • 10
    Electronic Resource
    Electronic Resource
    In vitro adsorption of colon cancer sera over staphylococcus protein a: lymphocyte stimulation by leakage of adsorbance (1987)
    Springer
    Journal of molecular medicine 65 (1987), S. 353-358 
    Details
    ISSN: 1432-1440
    Keywords: Immunoadsorption ; Protein A ; Immunosuppressive serum factors ; Colorectal cancer ; Mixed lymphocyte culture ; Lymphocyte proliferation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Serum factors may be responsible for reduced host-anti-tumor defence. Although there is still confusion about their origin, attempts have been made to immobilize serum components by Protein A columns as a therapeutic modality. In our study the in vitro adsorption of 90% of the IgG from cancer sera on “immobilized protein A” did not influence the inhibitory serum activity as measured in a mixed lymphocyte culture. Therefore, IgG or immune complexes do not seem to be the suppressive serum factor in patients with advanced colorectal carcinoma. There is evidence for leakage of small amounts of protein A from the columns which have immunostimulatory activity. Perhaps this may explain necrosis after a therapeutic immunoadsorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01745571
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