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  • 1
    Electronic Resource
    Electronic Resource
    Reduced tuberoinfundibular dopaminergic neuronal function in rats after long-term withdrawal of estrogen treatment (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 425-427 
    Details
    ISSN: 1420-9071
    Keywords: Tuberoinfundibular dopaminergic system ; prolactin ; estrogen-treated rats ; prolactin secreting adenoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Hypothalamic fragments from female rats treated repeatedly with estradiol valerate (EV) and bearing prolactin (PRL)-secreting tumors contained, seven months after the last EV injection, lower concentrations of dopamine (DA) than age-matched controls. Depolarizing concentrations of K+ (35 mM) and amphetamine (50 μM) evoked in PRL-secreting tumor bearing rats an endogenous DA release significantly lower than in controls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02118641
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  • 2
    Electronic Resource
    Electronic Resource
    Inhibition of light-induced stomatal opening and of guard-cell-protoplast swelling in Vicia faba L. by tentoxin, an inhibitor of photophosphorylation (1988)
    Springer
    Planta 173 (1988), S. 391-396 
    Details
    ISSN: 1432-2048
    Keywords: Guard cell protoplast ; Photophosphorylation ; Stomatal opening, inhibition ; Tentoxin ; Vicia (guard cell)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The fungal phytotoxin tentoxin and its natural derivative dihydrotentoxin impair light-induced stomatal opening in epidermal strips of broad bean (Vicia faba L.) incubated in a potassium-rich medium. Swelling of guard-cell protoplasts (GCPs) of the same species is inhibited in the presence of both substances. Swollen GCPs shrink after tentoxin or dihydrotentoxin treatment and these effects cannot be fully compensated by the phytoeffector fusicoccin. A comparison with the potassium carrier valinomycin shows that tentoxin acts in a different manner, because it is effective in the light only, whereas valinomycin causes shrinkage of GCPs also in the dark. Determination of adenine nucleotides in GCPs indicates a reduced ATP content and an enhanced ADP level after addition of tentoxin. At the same time, tentoxintreated GCPs contain more NADPH and less NAD+ than the control (NADP+ and NADH content does not differ). The results presented are consistent with the hypothesis that tentoxin closes stomata as a consequence of its inhibitory action on photophosphorylation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00401026
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  • 3
    Electronic Resource
    Electronic Resource
    Estimation of the volume neutralization effect on the ion decay in irradiated liquids (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 96 (1985), S. 31-40 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In the framework of a recently suggested recombination model it is shown that an increase of the initial ion concentration caused by higher irradiation doses leads to an increase of the fraction of ions recombining in the volume. This effect is represented for two different rate functions R/t/ assumed to describe the recombination rate for single ion pairs. Finally consequences of the volume recombination effect on the product yield of a competitive ion-scavenger reaction and for the determination of the real survival probability of the isolated ion pairs are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02165583
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  • 4
    Electronic Resource
    Electronic Resource
    Are there “prompt” like-sign dimuons? (1986)
    Springer
    The European physical journal 31 (1986), S. 39-49 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract From exposures of the CDHS detector at the CERN SPS we have obtained 367μ + μ − events in neutrino beams and 73μ + μ + events in an antineutrino beam. The magnitude of a prompt like-sign signal has been controversial in the past and moreover could not be explained by known production mechanisms. A critical discussion of the experimental situation is given. We have tried to reduce the systematic uncertainties of previous experiments and to get more information on the dependence of the signal with energy and the muon momentum cut-off. This experiment yields a signal of 2.8σ (2.4σ) of prompt like-sign dimuon events in the case of neutrinos (antineutrinos). The rate to charged current events is of the order of 10−4 forp μ〈9GeV andE〉100 GeV. The prompt signal has all the properties expected from the production and decay of charm-anticharm events. The magnitude, however, is substantially higher then the prediction of perturbative QCD but lower than some other experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01559590
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  • 5
    Electronic Resource
    Electronic Resource
    Kinetics of tetraphenylethylene radical cations in cyclohexane solutions (1986)
    Springer
    Journal of radioanalytical and nuclear chemistry 105 (1986), S. 37-46 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The kinetics of tetraphenylethylene radical cations in cyclohexane solutions investigated by nanosecond pluse radiolysis represents a model for an ion decay undisturbed by competing or subsequent reactions, i.e., it is caused only by pair and volume recombination of the solute ions. By dose variation it is shown that the ion decay is due to the interplay of these two processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02162818
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  • 6
    Electronic Resource
    Electronic Resource
    GC column effluent splitter for problematic solvents introduced in large volumes: Determination of di-(2-ethylhexyl) phthalate in triglyceride matrices as an application (1988)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 11 (1988), S. 135-139 
    Details
    ISSN: 0935-6304
    Keywords: Solvents and GC detectors ; Coupled HPLC-GC ; Column effluent splitter ; Di-(2-ethylhexyl) phthalate ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Introduction of solutions of up to several milliliters by on-column injection of large volumes or by coupled HPLC-GC may cause problems with GC detectors (FID, AFID, MS). For instance, dichloromethane forms large amounts of hydrochloric acid and carbon black in FIDs.A column effluent splitter was developed for keeping the major portion of the solvent vapors away from the detector; approximately 99% of the vapor is vented while the remaining 1% of vapor is used for detecting the widths of the solvent peaks. During analysis, the split ratio is reversed by a strong increase of the resistance to the gas flow through the split exit line.The system was used for the determination of di-(2-ethylhexyl)-phthalate (DEHP) in triglyceride matrices of various foods. Direct determination by HPLC is not sufficiently sensitive, whereas direct analysis by GC is hindered by the triglycerides. Solutions of fats or oils were pre-separated on a silica column using dichloro-methanelcyclohexane 1:l with addition of 0.05 % acetonitrile as eluent. The HPLC fraction containing the DEHP was transferred to GC through a loop-type interface using concurrent solvent evaporation. Detection limits were around 0.1 ppm.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240110135
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  • 7
    Electronic Resource
    Electronic Resource
    Coupled HPLC-GC for determining PCBs in fish (1987)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 10 (1987), S. 416-417 
    Details
    ISSN: 0935-6304
    Keywords: Coupled HPLC-GC ; Loop-type interface ; Concurrent solvent evaporation ; PCBs in fish ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240100713
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  • 8
    Electronic Resource
    Electronic Resource
    Co-solvent effects for preventing broadening or loss of early eluted peaks when using concurrent solvent evaporation in capillary GC. Part 1: Concept of the technique (1988)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 11 (1988), S. 388-394 
    Details
    ISSN: 0935-6304
    Keywords: Solvent effects ; Co-solvent effects ; Concurrent solvent evaporation ; Large sample volumes ; Coupled HPLC-GC ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The concept and some first results of a method are described for evaporating large volumes of solvent in a relatively short pre-column (retention gap) in such a way that solvent trapping retains volatile components in the inlet up to completion of solvent evaporation. The method was developed for transferring large volumes (easily exceeding 1 ml) of HPLC eluent to GC when using on-line coupled HPLC-GC, but is equally suited for injecting large sample volumes (at least some 50 μl) and could be particularly useful for introducing aqueous solutions.Concurrent solvent evaporation allows introduction of very large volumes of liquid into GC. However, peaks eluted up to some 40-80° above the column temperature during introduction of the liquid are strongly broadened due to the absence of solvent trapping. On the other hand, previous retention gap techniques involving solvent trapping were not suited for transferring very large volumes of liquid into GC. Using a relatively high boiling co-solvent added to the sample or the HPLC eluent, advantages of concurrent solvent evaporation can be combined with solute reconcentration by solvent effects, allowing elution of sharp peaks starting at the column temperature during introduction of the sample.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240110506
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  • 9
    Electronic Resource
    Electronic Resource
    Zeitstandversuche an einem mittels Induktivbiegeverfahren hergestellten Rohrbogen aus X 20 CrMoV 12 1 (1986)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 17 (1986), S. 120-126 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigations on the Creep Behaviour of a X 20 CrMoV 12 1 Bend, Fabricated by an Inductive Pipe Bending MachineA bend with a bend radius of 1700 mm -350 mm outer diameter and 25 mm wall thickness - of a X 20 CrMo V 12 1 steel, fabricated by an inductive pipe bending machine at 1050-900 °C deformation temperature was investigated. Heat treatment after fabrication: air cooling from 1050 °C, following a 2 hour annealing at 770 °C with air cooling. In addition to the usual mechanical and technological tests at ambient temperature and 530 °C, creep tests were conducted at 530 °C with unnotched and notched specimens. For comparison a straight pipe with the same dimensions was proofed, too.
    Notes: Ein Rohrbogen mit einem Biegeradius von 1700 mm - bei einem Rohraußendurchmesser von 350 mm und einer Wanddicke von etwa 25 mm - wurde aus dem warmfesten Röhrenstahl X 20 CrMo V 12 1, W.-Nr. 1.4922, nach dem Induktivbiegeverfahren bei einer Verformungstemperatur von 1050 bis 900 °C hergestellt. Die nachfolgende Wärmebehandlung erfolgte bei 1050 °C/Luft + 770 °C/2 h/Luft.Neben den üblichen mechanischen und mechanisch-technologischen Untersuchungen bei Raumtemperatur und bei 530 °C wurden auch Zeitstandversuche mit glatten und gekerbten Proben bei 530 °C durchgeführt. Zum Vergleich wurde auch ein gerades Rohr mit den gleichen Abmessungen zur Prüfung herangezogen.Alle ermittelten Werte entsprechen den Gewährleistungswerten. Rohrbogen und Rohr weisen auch nach langer Laufzeit noch hohe Werte der Duktilität auf.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19860170405
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  • 10
    Electronic Resource
    Electronic Resource
    3 Biochemische und Klinische Analyse (1986)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 323 (1986), S. 414-420 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00474615
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