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  • Electronic Resource  (19)
  • 1995-1999
  • 1990-1994  (19)
  • 1955-1959
  • 1992  (7)
  • 1990  (12)
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 1660-1660 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 4515-4522 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Palladium oxide thin films are studied by ellipsometry, optical transmission, and Raman scattering. The PdO films are made by completely oxidizing Pd films sputtered onto fused silica substrates, and their optical constants determined using a combination of ellipsometry and transmission measurements. Oxidation kinetics experiments are performed on thick Pd substrates at temperatures of 300–500 °C. The optical properties of the films show a thickness dependence suggesting an increased absorption at the PdO-Pd interface. Ellipsometry on oriented single crystals of PdO yields the anisotropic optical constants at 632.8 nm. These results are combined with an effective medium theory to show that the oxidized films have a void density of 20–25%. Raman scattering is demonstrated to be a very sensitive probe for detecting the presence of PdO on Pd. An oxide only a few A(ring) thick is readily detectable, despite the absence of any surface enhanced Raman effect.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Inorganic chemistry 29 (1990), S. 289-294 
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 7595-7601 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Homogeneous injection of holes into the gate oxide of metal-oxide-semiconductor (MOS) devices was obtained using p-channel MOS transistors under illumination conditions. Because gate hole currents could be measured the dependence of the hole trapping on the oxide electric field and on the energy of the holes at the injection point could be investigated. In contrast to results recently reported for electron injection no evidence for the generation of traps during hole injection was found. Only a small dependence of the capture cross section on the oxide field was observed. The study of the interface state generation during hole injection at various fields revealed that the amount of interface states directly generated by the injected holes is less than 5% of the number of trapped holes. For longer times a transformation process occurs and a correlation is found between the detrapping of holes and the generation of interface states.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The linkage relationship between eighteen isozyme loci and the morphological markers hypocotyl colour (R-r), monogerm character (M-m), pollen fertility (X) and stem fasciation (Verb.) are tested. Three linkage groups could be set up, involving all morphological marker loci and eight of the isozyme loci. Est-2, R-r, Fdp-2, Got2 and Icd-1 belong to linkage group I, linkage group II includes the loci Fas-fas M-m, Est-3 and Aco-1, linkage group III contains the loci X, Mdh-1 and Est-5.When analysing the inheritance of isozymes and RFLPs, deviations are usually found in some lines from the expected frequencies of a 3 : 1 or 1 : 2 : 1 segregation at single marker loci. In many cases these data can still be used for the estimation of recombination values with linked loci under the control of selection. Procedures to estimate linkage in such cases are given and applied to experimental data in Beta vulgaris.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 48 (1992), S. 626-639 
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: It is shown in this paper that the reflectivity of X-rays at smooth and fiat surfaces gives the dispersive correction f′(E) to the atomic form factor with an accuracy comparable to that obtained by X-ray interferometry. A detailed set of values of f′(E) in the energy range 7–27 keV is given for Ni, Cu, CuO, Ta, LiTaO3, Pt and Au, together with the corresponding linear absorption coefficients μ/ρ. Whenever comparison is possible the values of f′(E) agree very well with those obtained by interferometry or by Kramers–Kronig transformation. Data calculated according to Cromer & Liberman [J. Chem. Phys. (1970). 53, 1891–1898] agree well with our data far from absorption edges. At the edges there are substantial differences because the calculations do not take into account the structure of the edges, their chemical shift in compounds and the EXAFS structure above the edges. Below absorption edges the values of f′(E) for metals and their oxides are equal, provided the chemical shift in the position of the edges is taken care of. This feature is interesting in anomalous scattering experiments, where the variation off' with energy is used to vary the scattering contrast of a given atomic species. Once f′(E) is known, X-ray reflectivity measurements can be used to determine the density and the thickness of layers on fiat substrates. In addition, the roughness of the air-layer and layer-substrate interfaces have been determined with high precision in the metals and oxides mentioned above.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nutrition 29 (1990), S. 39-46 
    ISSN: 1436-6215
    Keywords: thiamine (vitaminB 1) ; pregnancy ; intrauterine growth retardation (IUGR) ; Thiamin (Vitamin B1) ; Schwangerschaft ; intrauterineMangelentwicklung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Zusammenfassung Der Gehalt an Thiamin (Vitamin B1) wurde im mütterlichen Blut jeweils in den Blutzellen und im Plasma bei normalem Schwangerschaftsverlauf und bei Schwangerschaft mit intrauteriner Mangelentwicklung des Feten bestimmt. Die Bestimmung der Thiaminkonzentration erfolgte mit der Thiochrom-Methode mittels HPLC-Trennung und anschließender fluorimetrischer Bestimmung nach der Methode von Weber et al. (2). Bei normalem Schwangerschaftsverlauf ist ein Abfall des Thiamingehalts in den Blutzellen von 230 nmol/l bis 170 nmol/l von der 28. bis zur 39. Schwangerschaftswoche zu beobachten. Bei schwerer intrauteriner Mangelentwicklung ist nur ein geringer Abfall des Thiamingehaltes von 140 nmol/l in der 30. Schwangerschaftswoche bis zu einem Gehalt von 130 nmol/l in der 39. Schwangerschaftswoche zu beobachten. Demgegenüber bleiben die Thiaminwerte in Plasma annähernd konstant. Um die Thiaminkonzentrationen bei normaler Schwangerschaft und bei schwerer intrauteriner Mangelentwicklung zu vergleichen, führten wir eine Einteilung in zwei Gruppen — eine von 28/0 bis 34/6 und eine von 35/0 bis 39/6 Schwangerschaftswochen durch. In beiden Gruppen waren die Thiaminwerte in den Blutzellen bei normaler Schwangerschaft signifikant höher als bei intrauteriner Mangelentwicklung (p=0,0001 und p=0,0005). Die Thiaminwerte im Plasma unterschieden sich jedoch nicht signifikant bei normalem Schwangerschaftsverlauf und bei Schwangerschaften mit intrauteriner Mangelentwicklung. Unsere Ergebnisse deuten darauf hin, daß mütterlicher Thiaminmangel einen Grund für eine intrauterine Mangelentwicklung darstellt.
    Notes: Summary The concentration of thiamine (vitamin B1) was measured in blood cells and plasma from mothers with normal pregnancy and from mothers whose pregnancy was complicated by intrauterine growth retardation (IUGR). Thiamine concentrations were estimated by the thiochrome method using HPLC separation and fluorimetric detection according to Weber et al. (2). During normal pregnancies the thiamine values in blood cells fall in the 28th to the 39th week of gestation from 230 nmol/l to 170 nmol/l. In cases with severe IUGR there is only a slight decrease in the thiamine levels from 140 nmol/l in the 30th week of gestation to a level of 130 nmol/l in the 39th week of gestation. During this period the thiamine values in plasma remain constant. To compare the thiamine concentrations in normal pregnancies and in those with IUGR we separated the thiamine values in a group from 28/0 to 34/6 and one from 35/0 to 39/6 weeks of gestation. In both groups mothers with normal pregnancy had significantly higher thiamine levels in the blood cells than mothers whose pregnancy was complicated by IUGR (p=0.0001 and p=0.0005). However, the thiamine values in plasma were not significantly different in normal pregnancies and pregnancies with IUGR. The results indicate that maternal thiamine deficiency might be one cause of IUGR.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    International journal of legal medicine 103 (1990), S. 313-313 
    ISSN: 1437-1596
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    International journal of legal medicine 103 (1990), S. 473-475 
    ISSN: 1437-1596
    Keywords: Japanese tan-to dagger ; vulneration risk ; Japanisches “Tan-to” Messer ; Verletzungsgefährdung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Es wird auf die besondere Klingenform japanischer “Blankwaffen” und auf die Neuentwicklung eines “Verwandlungs-Tan-to” verwiesen. Bei letzterem läßt sich die Klinge in der Handgriffmitte um 90° drehen und arretieren, eine “ideale Fixierung” dieses Messers durch Faustschluß am Quergriff. Durch these Bedingungen ist eine hohe Verletzungsgefährdung mit tödlichem Ausgang gegeben. Diese seit kurzer Zeit im Handel erhältlichen Messer sollten nach § 37 Waff G umgehend als “verbotene Gegenstände” definiert werden.
    Notes: Summary The great angle gauge of the blade top and the asymmetrical sharpening of the edge, the thickness of the blade (nearly 0.3 cm) and especially the short sharpened blade top give excellent stability of the cutting edge of this instrument and of its blade top. Flat bones can be perforated very easily without damaging the blade top. In recent times a newly developed Japanese tan-to is available in the FRG. The blade of this dagger can be fixed at right angles to the knife-handle, ready for use just as an “American San Francisco Push-Dagger” or an Indian “katar”, obviously very dangerous weapons. The possession of this new generation of Japanese tan-to should be legally prohibited.
    Type of Medium: Electronic Resource
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