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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 91 (1960), S. 280-289 
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 21 (1990), S. 0 
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: The purpose of this paper is to explain changes in regional attractiveness as measured by the competitive component of the shift-share model. This is done by applying the shift-share model to the manufacturing sector in the province of Quebec and using time series data for twenty two-digit industries as the basis of analysis. The study concludes that shift-share is useful for analyzing historical employment patterns and identifying their causes through regression analysis. However, the inherent structural instability limits the predictive potential of the model.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0014-4827
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Geoforum 21 (1990), S. 321-329 
    ISSN: 0016-7185
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geography
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The differentiation of spermatids in Hoplias malabaricus is characterized by chromatin compaction, flagellum development, nuclear rotation, nuclear fossa formation, and excess cytoplasm elimination. In the resulting spermatozoon, the head is round and the nucleus contains chromatin compacted in thick filaments, peripherically arranged, to a central electron-lucent area. The acrosome is absent. The nuclear fossa is eccentric but not pronounced. The proximal centriole penetrates it and is oblique to the flagellum. The long midpiece has several converging elongate vesicles, forming membranous hoops in the initial segment of the flagellum, but has no cytoplasmic channel. The mitochondria are elongate and branched or C-shaped and located around the initial segment of the axoneme. The lateral flagellum does not show lateral projections. The ultrastructural characteristics of H.malabaricus spermatozoa are similar to the Cypriniformes.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 15 (1980), S. 1224-1230 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Constitutional and structural studies have been carried out on the equiatomic percent alloy ZrCu, using magnetic susceptibility measurements, metallography and X-ray diffraction. The high-temperature magnetic susceptibility measurements and the metallographic studies indicate the presence of two solid state transformations in this alloy, a martensitic transformation with M s=440±5 K and a eutectoid transformation with T E=985±5 K. Thus, if the high-temperature ZrCu phase is metastably retained to lower temperatures then the martensitic transformation is observed, whereas prolonged annealing just below T E produces a eutectoid mixture; the metallographic studies indicate that this mixture is lamellar in nature. The X-ray diffraction studies indicate that the high-temperature ZrCu phase has the b c c CsCl-type structure.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 165 (1992), S. 209-217 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A study of Pu recovery at trace level from U solutions by ion exchange technique is presented. Plutonium retention 〉99.5% onto strong anionic resin, AG-X8, from nitric acid solutions and a 92% recovery using 0.4M HNO3 at 60°C as eluent, were obtained. Uranium interference in Pu sorption from mixed U/Pu nitrate solutions with low U/Pu ratio (∼25) was not verified. However, for high U/Pu ratio solutions (∼10000), uranium interference in Pu retention on the resin, decreases to 59%. Selecting the loading conditions and using AG-X4 resin, 99% Pu retention was achieved. The Pu product is still contaminated with U and another purification cycle is recomended. A scheme for U/Pu first cycle separation is proposed.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 317 (1984), S. 314-323 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary For the input of ecotoxic heavy metals (Cd, Pb, Cu, Zn and Ni) from the atmosphere into terrestrial and aquatic ecosystems their wet deposition with rain (and snow) has been established as the deposition type of predominant significance. The wet deposition situation in the Federal Republic of Germany has been observed systematically since 1980 with a network of automated samplers of own construction distributed over the various regions of the country (German Wet Deposition Program). These regions include rural areas from the North Sea coast to the Alps as well as urban agglomerations, industrial zones and locations with particular heavy metal emissions. The analysis of the heavy metals is carried out by differential pulse stripping voltammetry or for Ni by adsorption differential pulse voltammetry. At the same time the determination of the H+-concentration by electrometric high precision pH-measurements provides for the observation period 1980–1982 a survey on the acid deposition in the various regions of the Federal Republic of Germany. Based on reliable experimental data the main contours and the dimensions of the present burden by the deposition of acid rain and the wet deposition of ecotoxic heavy metals emerge.
    Notes: Zusammenfassung Für den Eintrag ökotoxischer Schwermetalle (Cd, Pb, Cu, Zn und Ni) aus der Atmosphäre in terrestrische und aquatische Ökosysteme hat sich die Naßdeposition als die vorherrschende Depositionsart erwiesen. Die Situation hinsichtlich der Naßdeposition in der Bundesrepublik Deutschland wird seit 1980 systematisch mit einem über das gesamte Bundesgebiet verteilten Netz automatischer Sammler eigener Entwicklung verfolgt (Deutsches Naßdepositionsprogramm). Die untersuchten Regionen schließen ländliche Gebiete von der Nordseeküste bis zu den Alpen ein sowie Ballungsräume, Industriezonen und Orte mit besonderer Schwermetallemission. Die Schwermetallanalyse erfolgt mit differentieller Pulsinversvoltammetrie oder für Ni mit differentieller Adsorptions-Pulsvoltammetrie. Gleichzeitig resultiert auf Grund präziser elektrometrischer pH-Messungen ein Überblick über die Säuredeposition in den verschiedenen Regionen des Bundesgebietes für den Beobachtungszeitraum 1980–1982. Basierend auf zuverlässigen experimentellen Daten ergaben sich die wesentlichen Konturen und die Dimensionen der gegenwärtigen Belastung der Bundesrepublik durch die Deposition von saurem Regen und die Naßdeposition ökotoxisch wirksamer Schwermetalle.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 31 (1991), S. 220-225 
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Wave-basin test results from a reduced scale model for an offshore compliant tower for deep water is used to assess fluid-structure interaction effects and to calibrate finite-element models. The experimental model complies with the theoretical conditions of hydroelastic structural similitude and the fluid in which it is immersed is plain water. This latter feature allows for observation of rigid plus elastic body motions of the model both in still water and under waves. The techniques employed for physical modeling and experimental analysis are briefly outlined, dynamic characteristics and responses obtained from tests are reported and comparisons are made with their theoretical-numerical counterpart.
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