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  • 1
    Electronic Resource
    Electronic Resource
    Effects of adrenergic neurotransmitter on K transport in superfused segments of rat submaxillary gland (1986)
    Springer
    Pflügers Archiv 406 (1986), S. 1-5 
    Details
    ISSN: 1432-2013
    Keywords: Submaxillary gland ; K uptake ; Adrenergic neurotransmitter ; Electrical field stimulation ; Tyramine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effect of the adrenergic neurotransmitter on K transport in the segments isolated from the rat submaxillary gland was investigated, employing the technique of electrical field stimulation (FS) and applying tyramine, a releasing drug for the catecholaminergic neurotansmitter. FS (16 Hz, 2 ms and 80 V for 1 min) caused a K release (peak value, 1.0 μmol/g/min) followed by a K uptake (peak value, 0.4 μmol/g/min) in the absence of any autonomic antagonist. Both FS-induced K release and uptake were blocked by the addition of tetrodotoxin (10−7 g/ml). In the presence of atropine (1.4×10−6 M), FS caused only a transient K uptake, which was abolished by the superimposed addition of propranolol (5×10−6 M). Application of tyramine (6×10−6−6×10−4 M) always only caused K uptake (peak value, 0.96 μmol/g/min), which was abolished by the addition of propranolol. The K uptake evoked either by FS or by tyramine application in the presence of atropine was not seen in the segments from rats pretreated (i.p.) with 6-hydroxydopamine. These results suggest that the adrenergic neurotransmitter activates mainly a β-adrenergic receptor and evokes K uptake through receptor activation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00582944
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Micropore filling of NO, SO2, NH3, and CO2 onα-FeOOH dispersed activated carbon fibers (1987)
    Springer
    Colloid & polymer science 265 (1987), S. 1018-1026 
    Details
    ISSN: 1435-1536
    Keywords: NO ; α-FeOOH ; carbon fiber ; adsorption ; micropore filling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Adsorption isotherms of NO, SO2, NH3, and CO2 onα-FeOOH dispersed activated carbon fibers at 303 K were examined to determine the role of surface modification in micropore filling. The parameters on micropore structures were obtained from both nitrogen adsorption at 77 K and benzene adsorption at 303 K; both isotherms were of BDDTI type and gave the same micropore volume. The preoxidation conditions of ACF, prior to the deposition ofα-FeOOH against the NO adsorptivity were examined. The dispersion ofα-FeOOH on ACF was effective in enhancement of micropore filling, irrespective of the adsorbate molecule. We determined the degree of volume filling for each gas by the use of a DR plot. The modified DR plot for an NO gas, of which the critical temperature was much lower than 303 K, was proposed. The degree of volume filling for various gases was correlated with the deviation of each boiling point from 303 K and with the van der Waalsa constant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412406
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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