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  • 2000-2004  (6)
  • 1980-1984  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Interaction of copper metallization with rare-earth metals and silicides (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 503-505 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Solid-phase reactions of copper films with underlying gadolinium, erbium, and erbium–silicide layers on Si(100) substrates were investigated. For the phase analysis, x-ray diffraction and cross-sectional transmission electron microscopy were used. In the case of Cu/Gd/Si(100), an orthorhombic GdSi2 formed, and, at higher temperatures, copper aggregated into islands. Annealed Cu/Er/Si(100) samples resulted in a hexagonal Er5Si3 phase. In the Cu/ErSi2−x/Si system, the copper catalyzes the transformation of the highly oriented hexagonal ErSi2−x phase into hexagonal Er5Si3. Diverse phase developments of the samples with Gd and Er are based on reactivity differences of the two rare-earth metals. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1378054
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  • 2
    Electronic Resource
    Electronic Resource
    Formation of epitaxial CoSi2 films on Si and on Si/Si80Ge20 (100) by reactive deposition epitaxy (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 81 (2002), S. 37-39 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: CoxTi1−x layers were deposited on Si (100) and on Si/Si80Ge20 (100) capped with 30- or 40-nm-thick Si at 650 °C substrate temperature at 1×10−6 Pa pressure. The Co–silicide films grown by reactive deposition epitaxy were characterized by Rutherford backscattering-channeling, x-ray difraction, by depth profile analysis of the components, and by sheet resistance measurements. The Ti content of the deposited Co layers was between 0.1 and 8 at. %. The epitaxy of the layers on Si and on Si/Si80Ge20 improved by increasing the Ti concentration. The minimum yield of the channeling and the full width at half maximum value of the rocking curve of CoSi2 decreased. The sheet resisitance of the formed layers was also minimal in these cases. The method applied is promising to form epitaxial CoSi2 layers on SixGe1−x substrates. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1491012
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  • 3
    Electronic Resource
    Electronic Resource
    Myelin-associated glycoprotein in human retina (1984)
    [s.l.] : Nature Publishing Group
    Nature 307 (1984), S. 548-550 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Rat monoclonal antibodies against myelin-associated glyco-protein were obtained as a by-product of attempts to raise monoclonal antibodies specific for membrane-bound nicotinic acetylcholine receptor (AChR) from the electric organ of Torpedo californica. Rats were immunized with AChR from the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/307548a0
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  • 4
    Electronic Resource
    Electronic Resource
    Correlation of individual symptoms and other clinical variables with cerebrospinal fluid amine metabolites and tryptophan in depression (1981)
    Springer
    European archives of psychiatry and clinical neuroscience 229 (1981), S. 345-353 
    Details
    ISSN: 1433-8491
    Keywords: CSF monoamines ; Depression ; Symptoms ; Tryptophan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cerebrospinal fluid 5-hydroxyindoleacetic acid (5HIAA), homovanillic acid (HVA), and tryptophan in both CSF and plasma were measured in a carefully selected group of 33 depressed women. Strict and explicit inclusion and exclusion criteria were used, and CSF was taken under controlled circumstances. Seventeen operationally defined and uniformly rated psychiatric symptoms as well as global depression severity and 12 clinical background variables were correlated with the four biochemical parameters, using multivariate regression analysis based on Spearman's rank correlation coefficient according to the nature of the data. Global depression severity did not correlate with any of the biochemical variables; there were, however, significant correlations between CSF 5HIAA and anxiety, insomnia, and suicide on the one hand, and between CSF HVA and motor symptoms and paranoidity on the other hand. Background variables showed only a few-and much weaker-correlations. It was concluded that central monoamine metabolism does affect some particular psychiatric symptoms but is not parallel with the complex clinical construct of the depressive disease. Further studies using isolated psychopathological symptoms instead of nosological categories are suggested in clinical neurochemistry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01833162
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    A survey of possible effects of long-lasting absence of solar activity on climate and some speculations on possible mechanisms (1981)
    Springer
    Climatic change 3 (1981), S. 189-203 
    Details
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract This paper deals with the prolonged lack (or existence) of solar activity, such as the Maunder or Spörer minima, since considerable climatic changes barely occur within a shorter time interval. For this aim, first the possible influences of the present-day 11-yr solar cycle are considered for higher atmospheric regions, and found scarcely to be responsible for inducing climatic changes. On the other hand, solar activity-generated changes of the solar parameter in the visible spectrum are estimated too. The results of these simple considerations indicate that the external manifestations of the solar cycle hardly can cause observable change in the tropospheric weather (and so the long-lasting solar quiets seem not climatically significant), and seem indirectly to support the possibility, that the Milankovitch mechanism plays an important role in forcing the ice-age oscillations at least during the Quaternary period. Besides it can be concluded, that greater (≥ 0.1%, measured from satellite platform) solar parameter variations cannot be in close connection with the known forms of solar activity, which suggest that the possible, significant secular solar luminosity changes could be generated deep inside the Sun and/or could not be closely related to the sunspot cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02423179
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A survey of possible effects of long-lasting absence of solar activity on climate and some speculations on possible mechanisms (1981)
    Springer
    Climatic change 3 (1981), S. 189-203 
    Details
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract This paper deals with the prolonged lack (or existence) of solar activity, such as the Maunder or Spörer minima, since considerable climatic changes barely occur within a shorter time interval. For this aim, first the possible influences of the present-day 11-yr solar cycle are considered for higher atmospheric regions, and found scarcely to be responsible for inducing climatic changes. On the other hand, solar activity-generated changes of the solar parameter in the visible spectrum are estimated too. The results of these simple considerations indicate that the external manifestations of the solar cycle hardly can cause observable change in the tropospheric weather (and so the long-lasting solar quiets seem not climatically significant), and seem indirectly to support the possibility, that the Milankovitch mechanism plays an important role in forcing the ice-age oscillations at least during the Quaternary period. Besides it can be concluded, that greater (≥ 0.1%, measured from satellite platform) solar parameter variations cannot be in close connection with the known forms of solar activity, which suggest that the possible, significant secular solar luminosity changes could be generated deep inside the Sun and/or could not be closely related to the sunspot cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00154436
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    On the Behavior of [Zn(Propyltetrazole)6](BF4)2 Single Crystal Under High-Vacuum Conditions (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 245 (2000), S. 329-335 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We studied the long-term (190 hours) behaviour of [Zn(propyltetrazole)6](BF4)2 single crystal under high-vacuum (HV) conditions (10−8 torr) with a depth-sensitive technique of positron annihilation spectroscopy (PAS). The obtained data indicate the slow formation of a new near-surface structure which is formed by the decomposition of the [Zn(propyltetrazole)6]2+ ions. The assumption of such a decomposition process was confirmed by additional mass spectroscopic measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006762505559
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Nuclear Data for Activation Analysis (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 244 (2000), S. 27-33 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Nuclear data for neutron activation analysis are reviewed critically. Available sources of neutron cross sections and related quantities, radioactive decay half-lives, gamma-ray energies and absolute intensities, as well as prompt gamma-ray data are assessed from the viewpoint of quantitative analysis. New developments in the production and dissemination of such data are also described, and practical recommendations are formulated. Special emphasis is given to the traceability of sources, the accuracy and age of data, and to electronic access via Internet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006798216987
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  • 9
    Electronic Resource
    Electronic Resource
    A New Gamma-Ray Spectrum Catalog for PGAA (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 244 (2000), S. 383-389 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A major obstacle to the use of the prompt gamma activation analysis (PGAA) method has so far been the lack of a suitable library. Therefore, new measurements have been performed at the PGAA facility at Budapest Research Reactor (BRR) in order to create a prompt γ-ray catalog for qualitative and quantitative analysis. Prompt γ-ray energies and associated k 0-factors have been determined by internal standardization. The resulting catalog contains prompt γ-ray data from neutron capture and other reactions such as (n,α), and decay γ-ray data from short-lived reaction products. Data have been measured for nearly all stable elements, from hydrogen to uranium. Generally, data for several isotopes are given, to enable isotopic analysis as well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006795827833
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  • 10
    Electronic Resource
    Electronic Resource
    Nondestructive Analysis of Metals by PGAA at the Budapest Research Reactor (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 244 (2000), S. 379-382 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Since 1996 several applications of prompt gamma activation analysis have been performed at the new Budapest PGAA facility. This paper deals with the investigation of metal objects. We report the results of nondestructive detection of H in amorphous metals, multielement analysis of Roman bronze brooches and measurement of silver concentration in Hungarian coins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006791710995
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