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  • 1
    Electronic Resource
    Electronic Resource
    Negative ion effects in CO2 convection laser discharges (1978)
    Springer
    Applied physics 16 (1978), S. 111-118 
    Details
    ISSN: 1432-0630
    Keywords: 42.55D
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Negative ions are computed to be formed on a time scale and in quantities such that they may be a cause of plasma instability observed in low pressure electrical discharge convection CO2 lasers. In a typical CO2−N2−He−H2O laser mixture the principal ions are CO 3 − , CO 4 − and H− with the total negative ion densityn − given by 0.1n e 〈n −〈n e , wheren e is the electron density: but if the gases are re-cycled or if there is an air leak NO 2 − and NO 3 − are formed in significant amounts andn − can become greater thann e in a time considerably less than the gas dwell time in the electrical excitation discharge. CO is effective in reducingn − in a system without re-cycling, but is ineffective in a re-cycled system with the oxides of nitrogen present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00931431
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evoked potential evidence for differences in binocularity between striate and prestriate regions of human visual cortex (1979)
    Springer
    Experimental brain research 36 (1979), S. 375-380 
    Details
    ISSN: 1432-1106
    Keywords: Binocularity ; Interocular transfer ; Visual evoked potentials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary For two components of the visual evoked potential elicited by the onset of a stationary pattern the degree of interocular transfer of the attenuation caused by prior exposure to a similar pattern was measured. The results show almost complete interocular transfer for component CII, thought to originate in prestriate cortex, but only partial transfer of CI, thought to be of striate cortical origin. This suggests that in man, as in monkey, monocularly driven neurones are more common in striate than in prestriate cortex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238918
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The pineal gland of the mole (Talpa europaea L.) (1976)
    Springer
    Cell & tissue research 165 (1976), S. 297-306 
    Details
    ISSN: 1432-0878
    Keywords: Pineal gland ; Mole ; Yellow-orange autofluorescent material ; Subcommissural organ
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Une étude de la glande pinéale de la Taupe, animal vivant toujours dans une obscurité complète, a été entreprise selon la technique de fluorescence décrite par Falck et al. (1962). Une importante innervation catécholaminergique a été démontrée tandis que la fluorescence jaune — caractéristique des indoleamines-n'a pas été observée. Après omission du traitement par la formaldehyde, de très nombreuses cellules contenant du material autofluorescent (jaune-orange) furent observées. La nature et la fonction de ce material autofluorescent est discutée.
    Notes: Summary The pineal gland of the mole, a mammal which lives in permanent darkness, has been studied using fluorescence histochemistry. An extensive catecholaminergic innervation is demonstrated. A yellow formaldehyde-induced fluorescence, characteristic of indoleamines, was not observed. If formaldehyde vapour treatment was omitted in the procedure, numerous cells containing yellow-orange autofluorescent material could be shown. The nature and possible function of this material is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222434
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    Paper (German National Licenses)
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