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  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 74 (1999), S. 1027-1029 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have fabricated Josephson field-effect transistors based on YBa2Cu3O7−δ bicrystal grain-boundary junctions (GBJs) and epitaxial SrTiO3 films as gate insulators. The SrTiO3 gate insulator shows high products of the breakdown field Ebd and the dielectric constant εr up to Ebdεr=1.3×1010 V/m allowing measurements over a wide range of applied gate electric-field Eg. The critical current Ic of the GBJs is found to depend highly nonlinear on Eg. Remarkably, the measured Ic(Eg) are very similar to the εr(Eg) curves. This strongly suggests that the observed electric-field effect is not due to a field-induced change in carrier concentration but is related to the dielectric properties of the SrTiO3 gate insulator. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 120 (2001), S. 0 
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: This study was initiated to find a method to correct the phenotypic yield for the yield decreasing influence of disease infection (= DC-yield potential). The inter-cultivar regressions of yield vs. disease infection were calculated in official trials in Germany and Austria with spring barley in 1983 and 1984 and with winter barley in 1996, 1997 and 1998, respectively. The residual of a genotype was interpreted as a measure of its DC-yield potential. The cultivar range of the DC-yield potential was 58.3% and 59.5% of the phenotypic yield range and the heritability of the residuals was about 10% below that of yield. In the spring barley experiments with and without fungicides the individual residual remained approximately constant even when the mildew infection changed remarkably, suggesting a useful predictability of individual yield performance when the degree of infection is changed either by environment, pathotype, or resistance genes.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied genetics 24 (1954), S. 77-92 
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied genetics 24 (1954), S. 97-115 
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Polymer bulletin 8 (1982), S. 527-534 
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Results are described of TSD- and TSP-measurements of Poly (Phenylquinoxaline) in dependence on the degree of annealing and on the polarizing field strength. Seven relaxations regions are investigated and discussed. Electronic and ionic space charge regions are observed and discussed in detail. It is shown that dielectric losses in polymers do not result from dipolar processes only, but also from translational motion of charge carriers.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Euphytica 5 (1956), S. 347-352 
    ISSN: 1573-5060
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In 1951, a line of the Austrian barley variety Vollkorn (a brewing barley widely grown in Lower Austria) was exposed to X-rays with a view to selecting mildew resistant mutants. Mildew infection was restricted to X2-ear progenies. In the X3-generation one mutant (indicated No. 3502/53) was found to be resistant to the mildew races A1, B, C, D, F and some other mutants showed a moderate resistance to the races A and B. Field trials proved that there was a correlation between the susceptibility to mildew and lodging. Mutant lines with high yields (127% of mother line) combined a good mildew resistance with a good resistance to lodging. The type of resistance induced and its interitance in various mutants is under investigation.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 31 (1980), S. 193-201 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The α-E- and α-T-characteristics are measured for some polyphenylquinoxalines, for polyethylenterephthalate and polyimide. These characteristics cannot be linearised in all parts of the lg α-E- and lg \documentclass{article}\pagestyle{empty}\begin{document}$ \alpha {\rm - }\sqrt E $\end{document}-diagram respectively. A model of charge carrier transport is discussed based on the POOLE-FRENKEL-effect. A relation is given to calculate the electric conductivity in dependence on the hopping distance, the field strength, the dielectric constant and the energetic depth of the centres. The calculated curves α = α(E) are in good agreement with experimental data. The spatial density of the centres and their energetic depth are determined.
    Notes: Die σ-E- und σ-T-Charakteristiken werden für verschiedene Polyphenylchinoxaline, für Polyethylenterephthalat und Polyimid bestimmt. Die gefundenen Kurven erlauben keine durchgängige Linearisierung im lg σ-E- bzw. lg \documentclass{article}\pagestyle{empty}\begin{document}$ \alpha {\rm - }\sqrt E $\end{document}-Diagramm. Ein Leitungsmodell auf der Basis des POOLE-FRENKEL-Effektes wird diskutiert. Unter plausiblen Annahmen gelingt es, eine Beziehung zur Berechnung der elektrischen Leitfähigkeit σ in Abhängigkeit vom Zentrenabstand, von der elektrischen Feldstärke, der Dielektrizitätskonstanten und von der Zentrentiefe zu gewinnen. Der berechnete Verlauf von σ = f(E) stimmt mit den experimentell gewonnenen Charakteristiken überein. Räumliche Zentrendichte und energetische Tiefe werden bestimmt.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 38 (1987), S. 378-384 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The electrical characterization of high resistance polymers is of growing interest. Appreciable advances of the knowledge on the electrical properties have been achieved in the past ten years. In the present paper are discussed the relevant specifities of polymers, charge transport and effect of polymer structure and aging on the charge carrier transport, on the generation of charge carriers and on the TSD spectrum.
    Notes: Die elektrische Charakterisierug hochohmiger Polymere gewinnt zunehmend an Interesse. Ein bemerkenswerter Erkenntnisgewinn über deren elektrische Eigenschaften konnte im letzten Jahrzehnt erreicht werden. Von den anstehenden Problemen werden die zu beachtenden Polymerspezifika, der Ladungstransport und der Einfluß der Polymerstruktur und der Alterung auf den Stromträgertransport, die Stromträgergeneration und auf das TSD-Spektrum diskutiert.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 31 (1980), S. 63-67 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: An influence of the contacts on the current-voltage-characteristic of PA 6 for the highest field range is supposed. From this and from measurements with special arrangements of the electrodes an injection of electrons is suggested. The structure of the samples has been varied by special temperature programms resulting in different partial crystalline systems. Analysis of the I-U-characteristic, regarding only the space-charge-limited-current (SCLC) part, leads to an exponential trap distribution depending directly on the structure. The electron mobility is estimated by means of an extrapolation procedure of the SCLC-characterstic.
    Notes: Ein KontaktEinfluß auf die Strom-Spannungs-Charakteristiken im Höchstfedbereich wird an PA 6 nachgewiesen. Daraus und aus Messungen mit speziellen Elektrodenanordnungen kann auf eine Elektroneninjektion geschlossen weden. Die Struktur der proben wird durch spezielle Temperprogramme variiert, so daß verschiedene teilkristaline Systeme entstehen. Die Analyse des raumladungsbeschränkten Teils der Charakteristik (SCLC) führt auf eine exponentielle Haftstellenverteilung, die direkt von der Struktur abhängig ist. Mit einem Extrapolationsverfahren wird aus den SCLC-Charakteristiken die Elektronenbeweglichkeit bestimmt.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The drift mobility is determined by time-of-flight-method using the electron beam technique for partially crystalline PETP-foils. Based on the characteristic dependences of the mobility on the electrical field, temperature and especially on the hopping distance a hopping mechanism by MOTT is suggested to apply to the charge carrier transport. In all cases the crystallites are the hopping centres. Orientation of the molecules perpendicular to the direction of the transport is accompanied by a slight decrease of the mobility.
    Notes: Die Driftbeweglichkeit wird in partiell kristallinen PETP-Folien mit der Transitmethode nach der Elektronenimpulstechnik bestimmt. Aus den charakteristischen Abhängigkeiten der Beweglichkeit vom elektrischen Feld, der Temperatur und besonders der Hoppingdistanz wird auf einen Hoppingmechanismus nach MOTT geschlossen. In allen Fällen erweisen sich die Kristallite als Hoppingzentrum. Die Molekülorientierung senkrecht zur Stromrichtung geht mit einer geringen Abnahme der Beweglichkeit einher.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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