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  • 1970-1974  (3)
  • 1
    Electronic Resource
    Electronic Resource
    PREPARATION OF SYNAPTOSOMES AND VESICLES WITH SODIUM DIATRIZOATE (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 23 (1974), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— Synaptosomes were prepared from rat brain on a continuous gradient of sodium diatrizoate and compared with synaptosomes obtained on a discontinuous sucrose gradient. The yield of synaptosomal protein using diatrizoate was double that obtained with sucrose. No significant differences in quality between the two preparations were found based on measurement of: β-glucuronidase, RNA polymerase, 2′,3′-cyclic nucleotide 3′-phosphohydrolase, total and Na+, K+ -ATPase, acetylcholinesterase, lactic acid dehydrogenase, glucose utilization, and serotonin uptake. Electron microscopy showed the vesicles in the diatrizoate synaptosomes to be better preserved. Vesicles prepared on diatrizoate segregated into two distinct bands which differed in electron microscopic appearance and enzyme activity. The less dense vesicles were smaller, had much higher Mg2+ -ATPase activity, and a lower content of acetylcholinesterase than the more dense vesicles. The less dense vesicle preparation was very homogeneous morphologically, free of myelin and mitochondria, and contained occasional organelle fragments and double membrane structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1974.tb10746.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Analytical model for super-ideal gases (1974)
    Springer
    Foundations of physics 4 (1974), S. 207-213 
    Details
    ISSN: 1572-9516
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The equations of state for the ideal classical gas are generalized with two characteristic constants known as the state indices. A simple and complete representation is developed for the super-ideal gas, with explicit results which are general enough to cover a wide range of equilibrium systems and states. Evidence and justification are provided in terms of examples and results of statistical physics. The new model should prove useful for treating problems involving physical behavior and properties which might otherwise call for specialized or advanced methods of statistical mechanics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00712687
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Infrared studies of cryogenic transitions in poly(ethylene terephthalate) and polystyrene (1971)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 15 (1971), S. 1237-1245 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Infrared absorbance measurements as a function of temperature down to 13°K have been made on poly(ethylene terephthalate) and polystyrene. Transition temperatures are assigned to the temperatures where there are abrupt changes in the absorbance or integrated band intensities. Bands of known structural origin arising from either crystal-line or amorphous phases are studied to probe the structure basis and environment effect for each transition. Transitions are found around 50, 120, 180, and 220°K for PET and around 50° and 235°K for polystyrene.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1971.070150518
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    Paper (German National Licenses)
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