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  • Electronic Resource  (18)
  • 1985-1989  (10)
  • 1980-1984  (7)
  • 1955-1959  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Superpolished single-crystal molybdenum mirror for x-ray ultraviolet to x-ray radiation (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 1111-1113 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High-quality single-crystal molybdenum (Mo) fabricated by a secondary recrystallization method has been polished with a new polishing technique. The superpolished surface of the Mo single crystal has a surface roughness of 3.5 A(ring) rms. This superpolished single-crystal Mo has been used for a high-power electron beam pumped argon excimer laser (λ=126 nm) as a cavity mirror. Peak output power of more than 3 MW has been achieved without any damage to the mirror surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99177
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  • 2
    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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  • 3
    Electronic Resource
    Electronic Resource
    X-ray optical properties of molybdenum-carbon, molybdenum-silicon, and nickel-carbon multilayers : International conference on synchrotron radiation instrumentation (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2006-2009 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have fabricated multilayer reflectors of molybdenum-carbon, molybdenum-silicon, and nickel-carbon for x rays of 1–200 A(ring) with an electron beam evaporation method in ultrahigh vacuum. The multilayers were deposited on flat and figured substrates of float glass and superpolished glass with a surface roughness of 2–3 A(ring) (rms). The thickness of a layer pair and the number of layer pairs were 30–100 A(ring) and 10–20, respectively. The x-ray characteristics of these multilayer reflectors were evaluated in the 1.5–200 A(ring) region with characteristic x rays (Cu-Kα, Si-Kα, Al-Kα, and C-Kα) and monochromatized synchrotron radiation. Peak reflectivities of molybdenum-carbon were found to be 70% at Cu-Kα and 40% at Al-Kα in grazing incidence and those of molybdenum-silicon to be more than 30% in the 150–170 A(ring) band in near-normal incidence. On the basis of these experimental results, the x-ray optical properties of multilayers are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140861
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  • 4
    Electronic Resource
    Electronic Resource
    A plane-grating monochromator for radiometric calibration : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2089-2092 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new plane-grating monochromator and calibration chamber were constructed for the radiometric calibration of plasma diagnostic devices. The monochromator is designed to cover a wavelength range of 1.8–238 nm with moderate resolving power of 500±200 in λ/Δλ. To check the performance of the monochromator, spectral distribution and resolution were measured by experiments on photoemission from solids and photoionization of rare gases. The characterization of multilayer reflectors by the use of this beamline is demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140833
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  • 5
    Electronic Resource
    Electronic Resource
    A theoretical study of thermal reactions of bicyclo[2.1.0]pent-2-ene (1987)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 109 (1987), S. 4157-4162 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00248a005
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Blastogenic response and immunoglobulin production by inflamed gingival lymphocytes from dogs (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of periodontal research 23 (1988), S. 0 
    Details
    ISSN: 1600-0765
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The present study evaluated blastogenic responses and immunoglobulin production (IgG, IgM) by inflamed gingival lymphocytes from dogs. The excised tissues were cut finely, digested in collagenase for 60 min, then passed through a mesh, teased with a 24 G needle several times and centrifuged over a ficoll gradient. Responses to PHA, Con-A and PWM were assessed using peripheral blood lymphocytes (PBLs) and submandibular lymph node cells (SNLs) as controls. Blastogenesis was evaluated from the uptake of 3H-thymidine and the presence of IgG and IgM in culture supernatants was quantified using ELISA. The extraction procedure resulted in a mean 2.09 ± 0.44 × 105 lymphocytes per 100 mg tissue (wet weight). These cells had a mean viability of 84.4 ± 3.0%. The responses of PBLs and SNLs to PHA, Con-A and PWM were substantial, as expected, while the responses of gingival lymphocytes to any mitogen remained at the level of unstimulated lymphocytes. However, gingival lymphocytes produced and secreted IgG and IgM. IgG production by gingival lymphocytes was elevated when compared with those of PBLs and SNLs, while IgM production by gingival lymphocytes was less than PBLs and SNLs. The responses of PBLs and SNLs are not parallel to the response of gingival lymphocytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0765.1988.tb01425.x
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  • 7
    Electronic Resource
    Electronic Resource
    Photoelectrochemical properties of metalloporphyrins (1980)
    [s.l.] : Nature Publishing Group
    Nature 284 (1980), S. 40-42 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Although attempts to build photovoltaic and photoelectrochemical devices sensitized by dyes have met with varying degrees of success1-14, the high quantum yields and energy efficiencies recently reported 15-17 for the primary photoprocesses in photosynthetic organisms have stimulated a renewed ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/284040a0
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  • 8
    Electronic Resource
    Electronic Resource
    A new mode of X-ray bursts from MXB1730–335 (1980)
    [s.l.] : Nature Publishing Group
    Nature 283 (1980), S. 358-360 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The observation was carried out with an X-ray burst monitor which consists of two sets of rotating modulation collimators: two coarse modulation collimators (CMC 1,2) and a fine modulation collimator (FMC 1) with a field of view of 17.4 and 5.8 (FWHM), respectively. Positions of steady sources and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/283358a0
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  • 9
    Electronic Resource
    Electronic Resource
    Muscular Exercise and Adrenal 17-Hydroxycorticosteroid Secretion in Dogs (1958)
    [s.l.] : Nature Publishing Group
    Nature 181 (1958), S. 715-715 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] For collecting the adrenal venous blood under physiological condition, the lumbar route method of Satake, Sugawara and Watanabe4 was employed. The dorsal spinal roots corresponding to the surgical operation area were cut under 'Evipan'-sodium and ether narcosis and about three weeks or more later ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/181715a0
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  • 10
    Electronic Resource
    Electronic Resource
    Steady state shapes of periodic profiles on (110), (100), and (111) surfaces of nickel (1981)
    Springer
    Applied physics 25 (1981), S. 231-238 
    Details
    ISSN: 1432-0630
    Keywords: 66.30 ; 68.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Periodic surface profiles with amplitudes of ≦0.4 μm and periodicities of 4–20 μm were prepared on Ni(110), (100), and (111) single crystal surfaces. These crystals were annealed in ultra-high vacuum (UHV) at 1073–1327 K after they had been cleaned by Ar ion bombardment and investigated by Auger electron spectroscopy. The geometry of the profiles was studied in UHV by laser diffraction and outside the vacuum by interference microscopy. The profiles have sinusoidal shapes on Ni(110) but trapezoidal shapes on both the (100) and (111) surfaces. This type of faceting can be understood on the basis of the anisotropic surface energy of Ni, with cusps at the (100) and (111) orientations. Model calculations show in the case of anisotropic surface energy that periodic profiles develop facets which correspond to the low surface energy orientations (close-packed surfaces).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00902976
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