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  • 1
    Electronic Resource
    Electronic Resource
    Dye-laser frequency stabilization using optical resonators (1984)
    Springer
    Applied physics 33 (1984), S. 179-185 
    Details
    ISSN: 1432-0649
    Keywords: 06 ; 07.60 ; 42.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We describe a study, performed using heterodyne techniques, of the frequency fluctuations of two completely independent ring dye lasers locked to independent reference cavities. Single laser linewidths of less than 750 Hz were achieved, the principal limitation being residual vibrations from the noisy laboratory environment. With future design and environmental improvements, ultranarrow linewidths are expected thus providing a useful tool for a great variety of high precision experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688526
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Laser phase and frequency stabilization using an optical resonator (1983)
    Springer
    Applied physics 31 (1983), S. 97-105 
    Details
    ISSN: 1432-0649
    Keywords: 06 ; 07.60 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We describe a new and highly effective optical frequency discriminator and laser stabilization system based on signals reflected from a stable Fabry-Perot reference interferometer. High sensitivity for detection of resonance information is achieved by optical heterodyne detection with sidebands produced by rf phase modulation. Physical, optical, and electronic aspects of this discriminator/laser frequency stabilization system are considered in detail. We show that a high-speed domain exists in which the system responds to the phase (rather than frequency) change of the laser; thus with suitable design the servo loop bandwidth is not limited by the cavity response time. We report diagnostic experiments in which a dye laser and gas laser were independently locked to one stable cavity. Because of the precautions employed, the observed sub-100 Hz beat line width shows that the lasers were this stable. Applications of this system of laser stabilization include precision laser spectroscopy and interferometric gravity-wave detectors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702605
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Cytochemical localization of ATPase activity in phloem tissues ofRicinus communis (1980)
    Springer
    Protoplasma 104 (1980), S. 55-65 
    Details
    ISSN: 1615-6102
    Keywords: ATPase cytochemistry ; Phloem ; Ricinus communis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Standard lead precipitation procedures have been used to examine the localization of ATPase activity in phloem tissues ofRicinus communis. Reaction product was localized on the plasma membrane of the companion cells associated with sieve elements and of parenchyma cells in phloem tissues from the leaf, petiole, stem and root. ATPase activity was also present on the plasma membrane and dispersed P-protein of sieve elements in petiole, stem and root tissue, but was absent from the plasma membrane of these cells in the leaf minor veins. Substitution ofβ-glycerophosphate for ATP produced no change in the localization of reaction product in leaf tissue. These findings are discussed in relation to current theories on the mechanism of sugar transport and phloem loading.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01279368
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The validity of the lead precipitation technique for the localization of ATPase activity in plant cells (1980)
    Springer
    Protoplasma 104 (1980), S. 193-200 
    Details
    ISSN: 1615-6102
    Keywords: Analytical electron microscopy ; ATPase cytochemistry ; Plasma membrane ; Ricinus communis ; Triticum aestivum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The claim that osmium-containing deposits which lack lead are frequently and incorrectly interpreted as enzymatic reaction products in lead precipitation techniques for ATPase localization in plants is without foundation. Proper controls clearly demonstrate the enzymatic origin of membrane-located deposits and the presence of lead is confirmed by analytical electron microscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01279767
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    Paper (German National Licenses)
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