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  • 1980-1984  (3)
  • 1950-1954
  • 07.65  (1)
  • Ion accumulation  (1)
  • Physics  (1)
  • 1
    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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  • 2
    Electronic Resource
    Electronic Resource
    Quantitative ion localization within Suaeda maritima leaf mesophyll cells (1981)
    Springer
    Planta 151 (1981), S. 555-560 
    Details
    ISSN: 1432-2048
    Keywords: Halophyte ; Ion accumulation ; Suaeda
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Grown under saline conditions, Suaeda maritima accumulates Na+ and Cl- into its leaves, where individual mesophyll cells behave differently in their compartmentation of these ions. Measurements of ion concentrations within selected subcellular compartments show that freeze-substitution with dry sectioning is a valuable preparative technique for analytical electron microscopy of highly vacuolate plant material. Using this approach, absolute estimates were made of Na+, K+ and Cl- concentrations in the cytoplasm, cell walls, chloroplasts and vacuoles of leaf mesophyll cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387435
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Anionic polymerization to high vinyl polybutadiene (1981)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 19 (1981), S. 1357-1360 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,3-Butadiene was polymerized anionically to polybutadiene which contained up to 100% 1,2-addition product. The atactic 100% 1,2-polybutadiene was prepared with n-butyllithium modified with bis piperidino ethane. The polymerization was done in hexane solvent at -5 to +20°C polymerization temperature.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.170190608
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    Paper (German National Licenses)
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