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  • 1
    Electronic Resource
    Electronic Resource
    Synchronized Dividing Algae (1966)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology 17 (1966), S. 439-458 
    Details
    ISSN: 0066-4294
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pp.17.060166.002255
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  • 2
    Electronic Resource
    Electronic Resource
    Changes in pigment content, lipid pattern and ultrastructure of synchronous Chlorella after heat and cold shocks (1978)
    Springer
    Planta 139 (1978), S. 29-33 
    Details
    ISSN: 1432-2048
    Keywords: Carotenoids ; Chlorella ; Chlorophyll ; Chloroplasts ; Lipids ; Temperature shocks ; Thylakoids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Completely synchronous Chlorella cultures were treated with heat (45°C) or cold shocks (4° C) of different lengths at the sixth hour of the 14:10 h lightdark-cycle. After the treatment the cells were grown under normal conditions. Analysis at the end of the cycle showed a direct connection between pigment bleaching, reduction of lipid content, loss of thylakoid stacking and a shift of the fluorescence emission maximuminto a region of shorter wavelength. The thylakoid stacking was completely loosened after a heat shock while two thylakoids remained in contact after cold treatment. This probably explains the different regeneration capacities in temperature shock treated cells. None of the described effects could be observed directly after the shocks. From the parallel decay of chlorophyll a, monogalactosyl diglyceride and carotenoids an intimate correlation with the photosystem II complex is suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390806
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  • 3
    Electronic Resource
    Electronic Resource
    Öffnung des Hypokotylhakens vonCardamine chenopodifolia PERS. durch Morphaktin im Dunkel (1968)
    Springer
    Naturwissenschaften 55 (1968), S. 451-451 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00602681
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  • 4
    Electronic Resource
    Electronic Resource
    Biochemical studies on Anacystis nidulans during its synchronous growth (1969)
    Springer
    Archives of microbiology 69 (1969), S. 34-39 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Im Verlaufe des synchronen Wachstums von Anacystis nidulans wurden einige Zellbestandteile bestimmt (Kohlenhydrat, Protein, Chlorophyll, RNS, DNS). In der Kältephase (26°) lag die Hauptsynthese des Kohlenhydrats, in der Wärmephase (32°C) die von Protein und Chlorophyll. Die niedere Temperatur verzögerte den Teilungscyclus, die DNS-Synthese jedoch lief weiter. Es werden die Beziehungen zwischen Zellteilung und DNS-Synthese diskutiert.
    Notes: Summary The changes in some of the major cellular constituents of Anacystis nidulans (carbohydrate, protein, chlorophyll, RNA, DNA) during its synchronous growth were examined. A greater synthesis and accumulation of carbohydrates were observed during the low temperature phase (26°C), whereas the main increase in nitrogen and chlorophyll a occurred during the high temperature phase (32°C). The low temperature postponed the division cycle, but the DNA synthesis continued. The relationship between the cell division and DNA synthesis is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408560
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  • 5
    Electronic Resource
    Electronic Resource
    Der Einfluß einzelner Maschinengrößen auf das Anlaufverhalten geblechter Schenkelpolsynchronmaschinen (1966)
    Springer
    Electrical engineering 51 (1966), S. 38-51 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents The influence of the exitor-winding and the stators resistant during the asynchronous starting of synchronous machines with salient poles are probed by using the equations that are published in authors earlier work [1]. Simple equations for current and torque are derived by neglecting the sator resistant. The amplitude of the swinging torque is probed exatcly. The publication is concluded by showing how one could approximately estimate the maximum of the amplitude of the swinging torque.
    Notes: Übersicht Mit Hilfe der in einer früheren Arbeit der Verfasser [1] gefundenen Gleichungen werden der Einfluß der Erregerwicklung und des Ständerwiderstandes auf den asynchronen Anlauf untersucht. Unter Vernachlässigung des Ständerwiderstandes werden relativ einfache Gleichungen für die Ströme und Drehmomente hergeleitet. Die Pendelmomentamplitude und die sie bestimmenden Größen werden einer eingehenden Betrachtung unterzogen. Abschließend wird beschrieben, auf welche Weise man bei großen Synchronmotoren die höchste Pendelmomentamplitude abzuschätzen vermag.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01588343
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  • 6
    Electronic Resource
    Electronic Resource
    Berichtigung (1967)
    Springer
    Electrical engineering 51 (1967), S. 212-212 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01427549
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Theorie des transienten Betriebsverhaltens von Drehstromkäfigankermotoren (1969)
    Springer
    Electrical engineering 53 (1969), S. 13-30 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents In this paper a theory is presented, dealing with transient operational behavior of AC—squirrelcage-motors. Using a method developed byKovacs andStepina the voltages and currents are represented by “Raumzeiger”. This theory is based on the squirrel cage havingZ2-rotor circuits. The time-dependence of the voltages and currents is arbitrary. As a result of this not only the basic magnetic arrow but also the arrow due to the triple numbers of pairs of poles is taken into consideration in the calculation.
    Notes: Übersicht In der vorliegenden Arbeit wird die Theorie des transienten Betriebsverhaltens von Drehstromkäfigankermotoren behandelt. Die Spannungen und Ströme wurden nachKovacs-Stepina mit Hilfe von Raumzeigern dargestellt. Die Theorie geht vom Käfiganker mit neuenZ2-Läufermaschinen aus und läßt einen beliebigen zeitlichen Verlauf der Spannungen und Ströme zu. Aus diesem Grunde werden neben den magnetischen Grundfehlern auch die Felder dreifacher Polpaarzahl in den Rechnungsgang einbezogen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01407212
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  • 8
    Electronic Resource
    Electronic Resource
    Note to the fine structure of Anacystis nidulans during its synchronous growth (1969)
    Springer
    Archives of microbiology 69 (1969), S. 370-372 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Es wurden zellmorphologische Veränderungen bei Anacystis nidulans während der Synchron-Kultur bei 2 Temperaturen untersucht und die Ergebnisse im Hinblick auf den physiologischen Zustand der Algen diskutiert. Bei 26°C kommt es zu einer größeren Akkumulation der Photosyntheseprodukte, wodurch die Individualität der Lamellen mehr oder weniger verdeckt wird.
    Notes: Summary The changes in the cellular morphology within the cell of Anacystis nidulans have been studied during the synchronous growth of the alga at two temperature levels and the structural changes are discussed in relation to the physiological state of the alga. There is a greater accumulation of photosynthetic products at 26°C and the individual identity of the lamellae is masked.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408577
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  • 9
    Electronic Resource
    Electronic Resource
    Molecular hydrogen: A new inhibitor of photosynthesis in the blue-green alga (cyanobacterium), Anabaena sp. TA 1 (1980)
    Springer
    Archives of microbiology 126 (1980), S. 1-10 
    Details
    ISSN: 1432-072X
    Keywords: Anabaena sp. ; Nitrogenase ; H2-inhibition ; Photosynthesis ; Pigment concentration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Molecular hydrogen strongly inhibits C2H2-reducing activity in intact cells of Anabaena sp. TA 1 in the light under anaerobic conditions. The inhibitory effect can be partially relieved by supplying the cells with molecular oxygen. When cells of Anabaena sp. TA 1 were grown under anaerobic N2-fixation conditions in the presence of 0.05 bar H2 with white light a pronounced decrease of growth rate occurred. With ammonium ions as nitrogen source the inhibitory effect of H2 was less pronounced. Concomitant with the reduced growth under N2 in the presence of H2 a loss of blue-green pigmentation was observed due to a diminished phycocyanin content. On the other hand, the concentration of carotenoids and chlorophyll remained nearly constant. With NH 4 + as nitrogen source nearly no alteration of phycocyanin content occurred upon incubation with H2. In addition, H2 induced a random distribution of thylakoid membranes in vegetative cells which normally exhibited a curved, parallel pattern. In heterocysts, however, photosynthetic membranes were always arranged randomly. Under far red light, growth and activity of photosystem II were largely diminshed. Under these conditions H2 exhibits an additional inhibitory effect. However, compared to 62% growth inhibition under white light, a decrease of only 20% occurred. Measurements of the photosynthetic electron flow with isolated thylakoid membranes showed that oxidation of diphenylcarbazide (DCP) by membranes from H2-grown cells was inhibited by 28% compared to membranes from control cells. Using ascorbate/DCPIP as electron donor an inhibition of only 1–4% was measured. It is concluded, that H2 inhibits electron flow in the photosynthetic electron transport chain at a site between photosystem II and photosystem I.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00421884
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  • 10
    Electronic Resource
    Electronic Resource
    Die Theorie des asynchronen Anlaufs von Schenkelpolsynchronmaschinen mit geblechten Läufern (1966)
    Springer
    Electrical engineering 50 (1966), S. 372-387 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Summary The synchronous machine with salient poles is treated during the asynchronous starting as a induction motor with unsymmetrical rotor. There airgap-fields are determined by the magnetic conductivity of the airgap and the current per cm of rotor and stator. The magnetic flux of each circuit is found by the integration of the airgap-fields. The Diagrammvectors of current are obtained by the differential-equations of voltage. The amplitude of the torque, which is swinging with double slip frequency, and the asynchronous corque are calculated by the product of induction and current per cm. The testet values of a 3000 KW synthronous machine show a good agreement with calculated ones.
    Notes: Übersicht Für den asynchronen Anlauf wird die Schenkelpolsynchronmaschine als Asynchronmaschine mit Läuferunsymmetrien behandelt. Über geeignete Ansätze für die magnetische Leitfähigkeit des Luftraums und die Strombeläge werden die Luftspaltfelder ermittelt. Mit diesen lassen sich die mit den einzelnen Stromkreisen verketteten magnetischen Flüsse bestimmen. Aus den stationären Lösungen der Spannungsdifferentialgleichungen ergeben sich die Bestimmungsgleichungen für die Diagrammvektoren der Ströme. Über den Drehschub lassen sich das asynchrone Drehmoment und die Amplitude des Pendelmoments der doppelten Schlupffrequenz berechnen. Die experimentelle Überprüfung an einem 3000 KW Synchronmotor zeigt eine recht gute Übereinstimmung zwischen gerechneten und gemessenen Größen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01407270
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