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  • ELECTRONIC EQUIPMENT  (1)
  • Electron microscopy  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Positively and negatively contrasted fibrils and membranes from rod outer segments of the frog retina (1972)
    Springer
    Cell & tissue research 132 (1972), S. 381-402 
    Details
    ISSN: 1432-0878
    Keywords: Retina ; Frog ; Rods ; Outer segments ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Rod outer segments of the frog,Rana esculenta, were isolated in Ringer solution or double distilled water, spread on grids, sometimes degraded enzymatically, and negatively stained. Thin sections from embedments of isolated outer segments were examined in an electron microscope fitted with a goniometer stage without further preliminary treatment. It was concluded that the rod outer segment contains not only membranes, but also fibrils and tubules. No undisputable statement can as yet be made concerning the substructure of the membranes. It could be ascertained that fibrils are still extant in the outer segment even after treatment with pronase or phospholipase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02450715
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    Paper (German National Licenses)
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    DC responsivity of proximity effect bridges to high frequency radiation (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The effect of microwave radiation on the dc current-voltage characteristic of proximity effect bridges has been studied at frequencies of 10, 35, and 90 GHz. The properties of bridges fabricated in layered films of Nb and Ta are reported. The fraction, epsilon, of the incident radiant power absorbed by the bridge is measured calorimetrically, permitting determination of the intrinsic responsivity (volts per watt of power absorbed when operated in a current-biased mode). In the test geometry employed, epsilon is typically about .0001 for a 0.1 ohm Nb-Ta bridge, and increases roughly linearly with dc junction resistance. Broad-band responsivity is generally independent of incident power, increases with increasing critical current (decreasing temperature), and decreases with increasing frequency. Peak responsivities achieved to date are about 100,000 V/W (absorbed) at 10 GHz and about 100 V/W (absorbed) at 90 GHz.
    Keywords: ELECTRONIC EQUIPMENT
    Format: text
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    NASA TECHNICAL REPORTS
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