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  • 1980-1984  (25)
  • 1965-1969  (15)
  • 1890-1899  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Psychology 18 (1967), S. 239-286 
    ISSN: 0066-4308
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Psychology
    Type of Medium: Electronic Resource
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  • 2
    facet.materialart.
    Unknown
    Boston, Mass., etc. : Periodicals Archive Online (PAO)
    The North American Review. 156 (1893:Jan./June) 439 
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  • 3
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 216-217 (1967), S. 51-55 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung An einem weichgemachten Polyvinylchlorid wurden bei Dehnbeanspruchung stabförmiger Proben die Spannungsrelaxation bei verschiedenen Dehnungen und die Deformationsretardation bei verschiedenen Spannungen untersucht. Die Temperatur wurde so variiert, daß das Materialverhalten im gesamten Bereich vom glasig-amorphen bis zum quasi-gummielastischen Zustand erfaßt wurde. Aus den Ergebnissen der beiden Versuchsarten wird geschlossen, daß außerhalb des linearen Beanspruchungsbereiches bei allen Temperaturen die Zeit- und die Deformationsabhängigkeit der Spannung getrennt werden können, während eine Trennung der Zeit- und der Spannungsabhängigkeit der Dehnung nicht möglich ist.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The reaction of satellite cells after the experimental infection with a neurotropic virus shows an enlargement of the nuclei of the satellite cells, an approach of the satellite cells to their ganglion cells, and a multiplication of the oligodendroglia. This reaction takes the same course in both chicks and chickens. Despite the possibility of re-isolating the virus from the brain, and the existence of a preencephalitic activation of the vessel wall, the reaction fails to show up when weak virulent strains of viruses are used. A highly virulent virus provoked a clear satellitosis in surviving animals only. However, no reaction could be observed in dead animals. The cytodynamic behavior of the satellite cells is quite similar after the experimental withdrawal of the nutrition, and after artificial coccidiosis. A stress induced by shaking until exhaustion (of the test animals) is just followed by lessening the distance, whereas no functionalswelling of nuclei and the multiplication of glial cells take place. The maturing of the satellite cell, dependent upon the age, was distinguished from these reactive alterations. It occurs mainly between the fourth and seventh week of life, and is characterized by the decrease in volume, by lessening the distance between satellite and ganglion cells, and by an augmentation of the glial index.
    Notes: Zusammenfassung Die Reaktion der Satellitenzellen besteht bei experimenteller Infektion mit einem neurotropen Virus in einer Vergrößerung der Satellitenzellkerne, einer Annäherung der Satellitenzellen an ihre Ganglienzellen und in einer Vermehrung der Oligodendroglia. Diese Reaktion verläuft be Külen und Hennen gleichartig. Sie bleibt bei Verwendung schwach virulenter Virusstämme aus, obwohl das Virus aus dem Gehirn rückisolier werden konnte und eine präencephalitische Gefäßwandaktivierung vorlag. Ein hochvirulentes Virus provozierte eine deutliche Satellitose nur bei den überlebenden Tieren. Bei den gestorbenen ließ sich dagegen keine Reaktion objektivieren. Das cytodynamische Verhalten der Satellitenzellen ist ähnlich nach experimentellem Nahrungsentzug und künstlicher Coccidiose. Bei einem bis zur Erschöpfung einwirkenden Schüttelstress erfolgt nur die Distanzverringerung, während die funktionelle Kernschwellung und die Vermehrung der Ganglienzellen unterbleiben. Von diesen reaktiven Veränderungen wurde die altersabhängige Ausreifung der Satellitenzelle abgegrentzt. Sie vollzieht sich hauptsächlich zwischen der 4. und 7. Lebenswoche und besteht in Volumenverkleinerung, Verringerung der Distanz zwischen Satelliten- und Ganglienzellen sowie in einer Vergrößerung des Gliaindex.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 16 (1967), S. 75-80 
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Results of radiochemical analysis for the isolation of the rabbit's bile pigment, which has been considered as a functional equivalent of human stercobilin, are described.
    Notes: Zusammenfassung Es wird über radiochemische analytische Ergebnisse zur Isolierung des dem menschlichen Sterkobilin entsprechenden Kaninchengallenfarbstoffes berichtet.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 321 (1982), S. 157-163 
    ISSN: 1432-1912
    Keywords: Tl+-ions ; Excretion ; Mucosal epithelium ; Small intestine ; Large intestine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. The movement of Tl+-ions was investigated on both isolated non blood-perfused jejunal and ileal segments as well as on stripped colon segments in vitro of rats. 2. After having administered radioactively labeled 204Tl-(Tl2SO4) on either the mucosal or the serosal side of these preparations only, a preferential direction of the movement of Tl+-ions from the serosal to the mucosal side was observed. In jejunal segments, the 204Tl-radioactivity at the mucosal side reached a concentration equilibrium with the concentration administered at the serosal side of the preparations. In colon segments a concentration gradient of more than 2 was established between the mucosal and the serosal side. In ileal segments the concentration of 204Tl-radioactivity in the mucosal fluid reached roughly 80% of that administered at the serosal side. 3. The amount taken up into the intestinal tissue is much higher after having administered the 204Tl-radioactivity from the serosal side than from the mucosal side. This holds true for jejunal ileal, and colonic segments. 4. In equilibrium experiments of non-everted colonic segments which were incubated on either side with the same 204Tl-concentrations the net transfer of 204Tl was determined directly. After a delay of 60 min the net transfer of 204Tl follows the rapid uptake into the intestinal tissue. 5. The net transfer as well as the tissue content of 204Tl decreases with increasing concentrations. From concentrations of 204Tl-ions of 5×10-5M on, no concentration gradient between the mucosal and the serosal side could be established. 6. The net transfer of 204Tl depends highly on temperature. At 29°C a diminished concentration gradient of the 204Tl between the mucosal and the serosal fluid was observed. At 25°C no concentration gradient could be established. The content of 204Tl in tissue, however, was not affected by this decrease of temperature. 7. The net transfer of 204Tl is nearly doubled by an increase of the K+-concentration at the mucosal side from 4.5 (normal) up to 72 mM, whereas the change of the 204Tl-content in tissue was statistically not significant. A decrease, however, of the net transfer of 204Tl is the consequence of an increased K+-concentration at the serosal side. In these segments the 204Tl content in tissue is decreased by 16% at the highest concentration of K+-ions.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 242 (1968), S. 145-151 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurde eine direkte Bestimmung des 3,4-Benzpyrens in wä\riger Lösung beschrieben, die auf der Löslichkeitserhöhung beruht, die das in Wasser schwer lösliche 3,4-Benzpyren durch Coffein erfährt. Es können so noch 4 ng/ml bei der angegebenen Standardisierung bestimmt werden. Bei der Direktbestimmung des 3,4-Benzpyrens im System Coffein-Wasser ist ein pH 〉6,0 einzuhalten, da bei höheren Wasserstoffionenkonzentrationen die Fluorescenzintensität stark abnimmt.
    Notes: Abstract A method for the direct determination of benzo(a)pyrene in aqueous solution is based on the increase of its solubility by coffeine. 4 ng of benzo(a)pyrene/ml can be determined by the procedure described. In this direct determination in the system coffeine-water the pH has to be adjusted to 〉6.0, as the fluorescence intensity considerably decreases with higher H+ concentrations.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 215 (1965), S. 350-355 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Für die Analyse metallurgischer Schlacken insbesondere aus dem Siemens-Martinprozeß wird ein spektrometrisches Schnellverfahren beschrieben, das an einem in Luft arbeitenden Emissionsspektrometer durchgeführt werden kann.
    Notes: Summary A spectrometric method is described for the analysis of open-hearth slags. The normal wave-length range is used in an emission spectrometer operating in air.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 231 (1967), S. 173-181 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Das Spanpreßverfahren eignet sich für die spektrometrische Analyse von durch Fräsen, Bohren und Sägen gewonnenen Stahlspänen. Allerdings sollte nach Möglichkeit gefrästen Spänen wegen ihrer besseren Gleichförmigkeit — im Sinne einer Gleichhaltung aller Untersuchungsbedingungen — der Vorzug gegeben werden. Versuche haben gezeigt, daß auch zerspantes Material von normalisierten Kohlenstoffstählen ≦1% C zu Elektroden der Entladung gepreßt und mit ausreichender Genauigkeit analysiert werden kann. Auf die günstige Möglichkeit der spektrometrischen Untersuchung von Spanproben aus gewalztem Material unberuhigter Stahlgüten wurde besonders hingewiesen.
    Notes: Summary The investigations described show the possibility to analyze with a vacuum spectrograph the briquetted chips obtained by cutting, boring, and sawing. The best results were observed in the case of the uniform chips obtained by cutting. The uniformity of these chips can be important for achieving always the same discharge conditions. Experiments have proved that it is also possible to investigate normalized carbon steels (≦1% C) after briquetting with a sufficient degree of accuracy and precision. The spectrochemical analysis of chips from rolled rimmed steel products is of special interest.
    Type of Medium: Electronic Resource
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