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  • 1
    Electronic Resource
    Electronic Resource
    Impedance and modulus spectroscopy of semiconducting BaTiO3 showing positive temperature coefficient of resistance (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 3850-3856 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Polycrystalline barium titanate that has been doped to give a positive temperature coefficient of resistance (PTCR) effect is an inhomogeneous material electrically. Analysis of ac impedance data using the complex impedance plane representation gives the dc resistance of PTCR ceramics. By additional use of the complex electric modulus formalism to analyze the same data, the inhomogeneous nature of the ceramics may be probed. This reveals the presence of two, sometimes three elements in the equivalent circuit. Grain-boundary and bulk effects may be distinguished from capacitance data: grain-boundary effects have temperature-independent capacitances, whereas bulk effects show a capacitance maximum at the Curie point and Curie–Weiss behavior above the Curie point. Both grain-boundary and bulk effects appear to contribute to the PTCR effect. These results reveal limitations in current theories of the PTCR effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344049
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Photocycloadducts of dimethylmaleic anhydride with unsaturated acids and esters (1988)
    s.l. : American Chemical Society
    The @journal of organic chemistry 53 (1988), S. 2624-2629 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00246a045
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Absence of Shock Hazard with Certain Multigap Spark Circuits (1956)
    [s.l.] : Nature Publishing Group
    Nature 177 (1956), S. 1175-1176 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The experiments to be described were carried out with spark circuits of a type and power-level widely used in spectrographic analysis. In each of the circuits shown, Gx represents the control gap determining the striking voltage, while Gz represents the analysis gap which, for convenience in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1771175a0
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  • 4
    Electronic Resource
    Electronic Resource
    Sporidesmium bakeri and Facial Eczema of Sheep in the Field (1959)
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 1327-1328 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] At the Manutuke Research Station, Gisborne, a facial eczema research farm of the New Zealand Department of Agriculture, two, 1-acre fields (No. 20 and No. 31), of perennial rye grass, white clover have been closely mown, at 7 14 day intervals, with motor lawn-mowers since the spring flush of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1841327b0
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  • 5
    Electronic Resource
    Electronic Resource
    Customer-supplier relations and the diffusion of employee relations changes (1996)
    Bradford : Emerald
    Employee relations 18 (1996), S. 9-19 
    Details
    ISSN: 0142-5455
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Economics
    Notes: Describes the utility of supply chain partnerships as a mechanism for the diffusion of change in employee relations. Uses case study and survey evidence to explain the means by which this can be achieved. Examines data relating to both customer and supplier organizations in the manufacturing sector. Concludes that the customer-supplier relationship can act as an agent of change in human resource management, particularly as they do not need to be artificially created, and can reach "peripheral" as well as "core" firms. Suggests that the local economic development agencies may be able to encourage the formation of networks of organizations in a particular industry and promote the spread of innovations in employee relations in this way.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/01425459610110209
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Yeast aging research: recent advances and medical relevance (1999)
    Springer
    Cellular and molecular life sciences 56 (1999), S. 807-816 
    Details
    ISSN: 1420-9071
    Keywords: Key words. Yeast; aging; senescence; helicase; silencing; nucleolus; metabolism; retrograde signaling.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. The molecular mechanisms of aging are most fully understood for the budding yeast Saccharomyces cerevisiae. Recent advances in our understanding of aging in this organism have enabled researchers to answer some fundamental questions about the aging process. Is aging due to a multitude of ‘mechanisms’ or can there be a key few? Can we design single-gene mutations that will prolong life? Can we prolong life whilst maintaining health and fecundity? The various contributing factors to yeast longevity, uncovered thus far, fall into three classes: DNA metabolism, heterochromatin, and metabolic activity. However, these separate classes may actually represent different aspects of the same aging mechanism based on genome stability. This review examines the recent advances in our understanding of yeast aging and discusses their relevance, if any, to the human condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000180050027
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  • 7
    Electronic Resource
    Electronic Resource
    Gastrointestinal permeability following cardiopulmonary bypass: a randomised study comparing the effects of dopamine and dopexamine (1997)
    Springer
    Intensive care medicine 23 (1997), S. 510-516 
    Details
    ISSN: 1432-1238
    Keywords: Key words Cardiopulmonary bypass ; Gastrointestinal permeability ; Dopexamine ; Dopamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To compare the effects of dopexamine and dopamine on the mucosal permeability of the gastrointestinal tract (GIT). Design: Prospective, randomised clinical trial. Setting: Intensive care unit of a postgraduate teaching hospital, London, England. Patients: Thirty patients undergoing elective surgery involving cardiopulmonary bypass, performed by a single surgeon. Interventions: Patients were randomly assigned to receive either dopexamine 2.0 μg/kg per min or dopamine 2.5 μg/kg per min for the duration of the study period. Measurements and main results: Hemodynamic parameters and gastric intramucosal pH (pHi) were measured at intervals throughout the study. GIT permeability was measured once, post-operatively, using the ratio of absorbed lactulose to L-rhamnose. The groups were similar with respect to demographics, pre- and post-operative risk factors. The lactulose/rhamnose ratio was (mean ± SEM) 0.44 ± 0.10 in the dopexamine group vs 0.65 ± 0.08 in that receiving dopamine (p 〈 0.05). The dopexamine group had a significantly higher oxygen delivery preoperatively (479.5 ± 32.0 ml/min per m2 vs 344.4 ± 23.9 ml/min per m2 for dopamine, p 〈 0.01), but no other significant differences emerged between the groups. Conclusions: Compared to dopamine, dopexamine reduces GIT permeability following surgery involving cardiopulmonary bypass. The mechanism of this effect remains unclear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001340050366
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  • 8
    Electronic Resource
    Electronic Resource
    Characterization of (Bi1/2Na1/2)TiO3 using electric modulus spectroscopy (1997)
    Springer
    Journal of materials science 16 (1997), S. 422-425 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Abstracts are not published in this journal
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018531419501
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  • 9
    Electronic Resource
    Electronic Resource
    The influence of moisture on the electrical conductivity of α-Bi4.10V1.90O10.90 ceramics (1997)
    Springer
    Journal of materials science 17 (1997), S. 203-205 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006528126789
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  • 10
    Electronic Resource
    Electronic Resource
    BulkPTC effect on doped BaTiO3 (1988)
    Springer
    Journal of materials science 7 (1988), S. 823-824 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00723773
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