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  • 2015-2019  (69)
  • 1985-1989  (10)
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  • 1
    Keywords: Forschungsbericht ; Fährverkehr ; Sicherheitsmaßnahme ; Risikoanalyse ; Gefahrstoff ; Detektion ; Entscheidungsunterstützungssystem
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (89 Seiten) , Illustrationen, Diagramme
    Language: German
    Note: Förderkennzeichen BMBF 13N11919. - Verbund-Nummer 01101745 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 3636-3643 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An experimental system for measuring ion-beam-induced deposition yield is described. Gold films were deposited on quartz-crystal microbalances (QCM) by decomposing dimethyl gold hexafluoroacetylacetonate molecules (C7H7F6O2Au) with a 5-keV argon-ion beam. The QCMs provide an in situ measurement of the deposition rate as a function of ion dose, dose rate, gas pressure, and substrate temperature. The deposition yield, or mass deposited per incident ion, is shown to increase with increasing pressure and decreasing temperature. The yield is independent of the ion dose rate, which implies that the deposition process is not due to macroscopic heating. The deposition yield is shown to depend on the sputter yield of the substrate. The density of the deposited films was determined to be about 10 g/cm3, which is about half the density of bulk gold (19.3 g/cm3). The difference in density is due to carbon contamination in the deposited films.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 2724-2730 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The emission and deposition of molten gold droplets from needle-tip liquid metal ion sources was investigated. The Taylor cone was identified as the source of droplet emission. An upper limit of 8 μm for the virtual source size was measured. Gold films were deposited on silicon substrates. The deposited gold spots showed a peaked, axially symmetric, distribution with a half angle for droplet emission of ∼2° which was considerably smaller than the ion emission angle of ∼45°. Typical deposition fluxes were ∼5×105 μm3/s/sr with total deposition rates of ∼3×103 μm3/s and on an average droplet diameter of ∼1 μm at an emission current of 150 μA. Smaller diameter droplets are produced with decreasing emission current and angle. Gold films with a fine textured morphology suitable for submicron patterning were obtained at emission currents less than ∼135 μA.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 870-874 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Gold films were deposited on quartz crystal microbalances (QCM) by decomposing C7H7F6O2Au [dimethyl gold hexafluoroacetylacetonate, or DMG(hfac)] with a 5-keV argon-ion beam. A model for ion-beam-induced deposition is presented which relates the net deposition yield to the gas adsorption, the decomposition cross section, and the sputtering yield. The deposition rate was measured in situ as a function of ion current, gas pressure, and substrate temperature using the QCM. The deposition yield (mass deposited per incident ion) increased with increasing gas pressure and decreasing substrate temperature. The QCM was also used to measure the adsorption of DMG(hfac). The results demonstrated that the variation in deposition yield with temperature and pressure was proportional to the number of DMG(hfac) molecules adsorbed per cm2. Based on the observed correlation between deposition yield and adsorption, a decomposition cross section for 5-keV argon ions of 2×10−13 cm2 was estimated.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Superconducting films of Bi2Sr2CaCu2Ox have been fabricated on single-crystal MgO substrates by a low-temperature in situ process. Using a substrate temperature Ts≈645 °C, metallic films with a superconducting onset of 90–100 K and an extrapolated Tc0=56 K have been obtained. X-ray diffraction shows the films to be c-axis oriented. Electron microscopy reveals that the films are not significantly smoother than films which were post-annealed at 865 °C, and that some segregation into nonsuperconducting phases had occurred. The exact mechanism by which crystallization and superconductivity occurs at such low temperatures is not yet known, but it can be speculated that the surface atoms are less constrained and thus have a smaller energy barrier to overcome in forming a crystal structure.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archiv der Mathematik 47 (1986), S. 376-378 
    ISSN: 1420-8938
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 42 (1986), S. 537-542 
    ISSN: 1420-9071
    Keywords: Annual ring ; beech ; trace metals ; environmental pollution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Annual rings of 140–160-year-old beeches (Fagus sylvatica) from St. Ingbert, Saarland (FRG) were prepared and analyzed for 14 metals by atomic absorption spectroscopy. According to the chronological variations of their concentrations, the elements could be divided into three groups: 1) Metals without any tendency for chronological changes. This was established for Na, K, Cu, Cr, Co, Ni, Pb, and Cd. 2) Metals with a recent decrease of their concentrations, appropriate for Ca, Mg, Mn, and Zn. 3) Metals with a recent tendency to increase, e.g. Fe and Al. These variations are discussed in connection with the industrial history of the Saarland region and the influence of acid immissions which may alter the soil and thereby the trace element metabolism of the trees with consequences for the vitality of the plants.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Genetica 78 (1988), S. 145-152 
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three domestic cat populations from Yugoslavia (Bitola, Ohrid, Struga) were surveyed at six colour loci (orange, non agouti, tabby, dilute, piebald spotting, dominant white) and one coat length locus (long hair, allele l). Statistically significant differences were obtained in frequencies of alleles: O, a, l and W. Human preferences and cultural contacts with other countries especially Turkey are discussed in the paper. Genetic distance analysis did not show that Macedonian populations are more similar to Turkish or Greek ones than populations from Dalmatia, where Turkish influence was absent, although there are similarities between Macedonian and Turkish populations as far as the O allele is concerned. There was a statistically significant correlation between the duration of Turkish rule in the middle and eastern part of the Mediterranean and O and l alleles frequencies.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1612-4766
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung In einem Ringversuch, an dem verschiedene Forschungsinstitutionen teilnahmen, wurden die Vor- und Nachteile der offenen und verdeckten Ausbringung von Rodentiziden in Forstkulturen zur Abwehr von Mäuseschäden eingehender untersucht. Verwendet wurden die derzeit verfügbaren Ködermittel Lepit®-Forstpellet (blaugefärbtes wachshaltiges Granulat auf der Basis von Pektin mit 0,0075% Chlorphacinon), Arrex®-E-Köder (eingesiegelte Sonnenblumenkerne mit 3,75% Zinkphosphid) und Arrex®-M-Köder klein (Ködermehlplättchen mit 2% Zinkphosphid). Diese Ködermittel wurden, wie bisher üblich, breitwürfig bzw. offen in Kulturen ausgestreut (Flächen VM), oder verdeckt und konzentriert in Köderstationen ausgelegt (Flächen PM). Eine unbehandelte Fläche (UB) diente zur Kontrolle. Als Köderstationen dienten an der Niedersächsischen FVA entwickelte Kunststoffbehälter mit Ventilverschluß. Die Dichte schädlicher Mäuse wurde bei der verdeckten Auslegung zunächst etwa im gleichen Ausmaß reduziert wie beim breitwürfigen Ausstreuen. Bei der verdeckten Auslegung wurde jedoch wesentlich weniger Mittel benötigt, insbesondere bei der Verwendung von Antikoagulantien (Lepit®-Forstpellet), nämlich nur etwa 2–4 kg/ha gegenüber 15 kg/ha bei breitwürfiger Ausbringung. Zinkphosphidhaltige Köder waren allgemein nicht gut geeignet für die Köderstationen, weil sie in Behältern einen abweisenden Geruch entwickeln. Köderstationen eröffnen die Möglichkeit, Kulturen nachhaltig über den ganzen Winter hinweg zu schützen. Außerdem können attraktivere Ködermittel und Lockstoffe eingesetzt werden. Eine Gefährdung von Nicht-Zielorganismen ist bei der Verwendung entsprechend sicherer Behälter weitgehend ausgeschlossen.
    Notes: Abstract The Common Vole (Microtus agrestis) and the Redbacked Vole (Clethrionomys glareolus) can cause severe damages in forest plantations. Different application techniques of rodenticides to control these harmful rodents were tested by several institutions of plant protection in the Federal Republic of Germany. The following registered baits were used: A bluestained pectin-wax pellet containing 0.0075% Chlorphacinon (Lepit®-Forstpellet), small flour-plates (Arrex®-M-Köder klein) and sunflower kernels coated with plastique-foil (Arrex®-E-Köder) both incorporated with 2% resp. 3.75% zinc-phosphide. In 1985 disperse spraying versus concentrated offering of the baits in 12 earthenware pipes/ha was tested. The density of mice and voles could be reduced nearly to the same level with both methods. However, the amount of baits needed was much less when bait stations were used. In 1986 a new and save type of bait station (Theyson-Köder-station) was tested, from which non-target animals cannot get baits. The acceptance of the bait station could be improved by aromatic compounds from apples. According to the obtained first results forest plantations can be protected during the whole wintertime against vole-damages by means of bait stations.
    Type of Medium: Electronic Resource
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