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  • 1985-1989  (3)
  • 1965-1969  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 679-681 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A pnn double heterostructure optoelectronic switch with dual extractor electrodes was dynamically operated as an optical memory with the resulting achievement of 20 μW holding power. This value represents a reduction in holding power of about three orders of magnitude as compared to that of conventional light-emitting optical bistable devices. Complete operation, involving optical writing, regeneration, and high-speed erasing of written data through a dual extractor-electrodes configuration, was carried out with a simple driving scheme.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 703-705 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A compound-semiconductor device simulator, in which deep levels in the semi-insulating layers can be taken into account, has been developed. By using this simulator, the electrical properties for the semi-insulating InP buried heterostructure laser diodes were investigated. The leakage current, without passing through the active region, was found to be small when the trap density in the semi-insulating InP layers is more than 3×1015 cm−3 and less than 1×1016 cm−3. This simulator will be a useful tool in predicting the semi-insulating properties of electrical and optical semiconductor devices.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 329-331 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A photoeletronic bistable device with selectable light output channels has been fabricated for implementation in photonic switching and processing systems. The device is a variation of the vertical to surface transmission electrophotonic device. Output in the stimulated light emission mode was successfully obtained from different waveguide channels by external electronic switching. Output channels could be switched at a rate of 400 Mb/s. The potential versatility of this device has been experimentally confirmed in programmable or switchable optical interconnections.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 47 (1969), S. 1109-1111 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Gastric juices siphoned out from collectively 70 cases are incubated with digitoxin and digoxin respectively. The difference of glycoside-values determined by xanthydrol between the value before incubation and the after incubation, gives hydrolysed heart steroid portion. It is clear that not only digitoxin but also digoxin are almost equally hydrolysed dependent upon pH-value (between 1,0–3,0). Incubation with gastric juice of pH above 3,0 brings not demonstrable change of glycoside molecules. It is urther obtained that the destruction of digitoxin and digoxin respectively is limited not by the effect of the ferment action, but purely by the effect of acid action. The incubation with pancreasextract lasts the concentrates of digitoxin and digoxin solutions unchangeable.
    Notes: Zusammenfassung Magensaft aus insgesamt 70 Ausheberungen wurde mit Digitoxin bzw. mit Digoxin inkubiert. Die Differenz zwischen der mittels Xanthydrol festgestellten Glykosidmenge vor und nach der Inkubation ergab den durch Magensaft hydrolysierten Herzsteroidanteil. Es zeigte sich, daß sowohl Digitoxin als auch Digoxin fast gleichermaßen in Abhängigkeit vom pH-Wert (zwischen 1,0–3,0) hydrolysiert werden. Inkubationen mit Magensäften mit einem pH über 3 riefen keine nachweisbare Veränderung des Glykosid-Moleküls hervor. Es wurden ferner Ergebnisse gewonnen, die dafür sprachen, daß der Digitoxin- bzw. Digoxin-Abbau nicht Folge der fermentativen Einwirkung, sondern lediglich durch Säureeinwirkung bedingt war. Pankreasextrakt-Inkubationen ließen die Digitoxin- und Digoxin-Konzentration der Lösung unverändert bestehen.
    Type of Medium: Electronic Resource
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