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  • 1
    Electronic Resource
    Electronic Resource
    Frequency overshoot in quartz crystal oscillators during the warm-up time. Application to the BVA resonator (1983)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1163-1174 
    Details
    ISSN: 0392-6737
    Keywords: Mechanical properties of solids (related to microscopic structure)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Résumé Une analyse complète du phénomène de dépassement de fréquence présenté par les oscillateurs à quartz pendant leur période de démarrage est présentée. Une application particulière est faite pour les oscillateurs équipés de résonateurs à électrodes non adhérentes.
    Abstract: Riassunto Si propone un'analisi del fenomeno di overshoot che è prodotto da oscillatori del quarzo durante il tempo di riscaldamento. Si descrive una particolare applicazione ad oscillatori equipaggiati con risonatori «senza elettrodi».
    Notes: Summary An analysis of the overshoot phenomenon which is produced by quartz oscillators during the warm-up time is proposed. A particular application to oscillators equipped with «electrodeless» resonators is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457151
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  • 2
    Electronic Resource
    Electronic Resource
    Analyse des paramètres hydrobiologiques dans la remontée de Cabo Frio (Brésil) (1984)
    Springer
    Marine biology 82 (1984), S. 259-276 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract South Atlantic Central Waters (SACW) upwell close to Cabo Frio (Brazil, Rio de Janeiro) shore. The resultant typical hydrobiological conditions were studied at an anchorage station over an annual cycle from February 1973–February 1974. Multivariate analyses of hydrological and planktonic data revealed the structure of the ecosystem and the factorial relations governing its dynamics. Alternation, superposition or mixing of the water masses of different origin (Brazil current, coastal, SACW) constitute the most important factors responsible for the great hydrobiological variability observed in the study area. Spasmodic changes in wind direction and force are superimposed on a seasonal trend of more frequent upwelling in summer than during the rest of the year. The deep water is characterized by temperatures of 〈18°C, nitrate contents of 10 μg-at l-1 and by organic matter mainly composed of detritic elements from the shelf. Temperature variations together with nutrient contents (NO3 or PO4) reflect variations in primary biomass at the surface but not at 50 m depth, where detrital matter precluded valid measurements. Water of the Brazilian Current (salinity ≧36.0‰) frequently mixes with deep water of the thermal front, or with coastal water (〈35.0‰) which invades the area when south-west winds prevail. This lower-salinity water is rich in seston particles. During the study period, primary biomass was relatively low due to eutrophication. We observed less than 3 μg l-1 chlorophyll and 106 phytoplankton cells per litre: the phytoplankton populations were highly diversified, indicating an advanced degree of complexity and evolution of this ecosystem. The observed formation of a thermocline constitutes an important inducing factor for an algal bloom. Simultaneous phyto- and zooplankton maxima would induce an increased grazing rate by herbivorous zooplankton which would also partly explain the relatively low level of primary biomass. Zooplankton is as abundant here as in other great upwelling regions: 100 organisms l-1 and 200 mg organic matter m-3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392407
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  • 3
    Electronic Resource
    Electronic Resource
    Concentration modulation by thermal decomposition for multiplex gas chromatography (1983)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 6 (1983), S. 621-622 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Multiplex GC ; Vacancy chromatograms ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240061107
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  • 4
    Electronic Resource
    Electronic Resource
    A non-mechanical chemical concentration modulator for multiplex gas chromatography (1982)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 5 (1982), S. 269-271 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Multiplex mode ; Thermal device for signal modulation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240050510
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    Paper (German National Licenses)
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