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  • 1990-1994  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Presynaptic Receptors on Peripheral Noradrenergic Neurons (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 604 (1990), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1990.tb31978.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of the 5-Hydroxytryptamine Receptor Modulating the Release of 5-[3H]Hydroxytryptamine in Slices of the Human Neocortex (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 59 (1992), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: In the rat brain, the presynaptic 5-hydroxytrypt-amine (5-HT) autoreceptors located on 5-HT terminals correspond to the 5-HT1B subtype. The presence of a 5-HT receptor probably located on 5-HT nerve endings and modulating transmitter release in the human neocortex has been reported, but its detailed pharmacological characterization is not yet available. On the other hand, receptor binding and autoradiographic results indicate that the 5-HT1B receptor subtype is not present in the human brain. We, therefore, studied the modulation of the electrically evoked release of [3H]5-HT by various 5-HT receptor agonists and antagonists in preloaded slices of human neocortex obtained from 18 patients undergoing neurosurgery. The nonselective 5-HT1A/1B/1D receptor agonist 5-carboxamidotryptamine produced a potent inhibition (70% at 0.03 μM) of the electrically evoked release of [3H]5-HT which was blocked by 5-HT receptor antagonists with the following relative order of potency: methiothepin 〉 metergoline = methysergide 〉 propranolol. The selective 5-HT1A receptor agonist 8-hydroxy-2–(di-n-propylamino)tetralin at 0.1 μM did not modify the electrically evoked release of [3H]5-HT. The 5-MT1A/1B receptor agonist RU 24969 was 10 times more potent at inhibiting [3H]5-HT overflow in the rat frontal cortex than in the human neocortex. The potent 5-HT1B receptor antagonist cyanopindolol did not modify the 5-carboxamidotryptamine-induced inhibition of the electrically evoked release of [3H]5-HT in slices of the human neocortex, but produced by itself a small inhibition of [3H]5-HT overflow. The α2-adrenoceptor antagonist yohimbine, which possesses affinity for the 5-HT1D receptor subtype, decreased the release of [3H]5-HT, but only in the presence of the selective α2-adrenoceptor antagonist idazoxan, which by itself increased significantly [3H]5-HT overflow. Taken together, these results support the view that the 5-HT receptor modulating the electrically evoked release of [3H]5-HT in slices of the human neocortex could be of the 5-HT1D subtype. Moreover, preliminary results obtained with idazoxan confirm the existence of a presynaptic α2-adrenoceptor modulating the release of [3H]5-HT in the human neocortex. These α2-heteroreceptors could exert a tonic inhibitory modulation on 5-HT neurotransmission in the human neocortex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1992.tb08440.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Nutritional and density-dependent responses of some cladocera (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 24 (1993), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. Four cladoceran species of importance as fish food organisms, viz. Daphnia similes (Claus), Simocephalus vetulus (Schodler). Moina macrocopa (Straus) and Ceriodaphnia cornuta (Sars), were raised in the laboratory on nutrient sources including manures, rice bran and Chlorella. The organisms responded better with rice bran and Chlorella.The productivity of culture organisms appeared to depend upon inoculum and residual densities, indicating a relationship between periodic harvesting and increased production. Associated study reveals the importance of space per individual in the success of laboratory cultures. The optimum space requirement of each species determined by the size of culture organism may vary from 4·5cm3 per individual for small species like Ceriodaphnia to 41·8cm3 per individual for the larger species, Daphnia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2109.1993.tb00639.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Electrogenerative oxidation of ferrous ions with graphite electrodes (1993)
    Springer
    Journal of applied electrochemistry 23 (1993), S. 745-752 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electrogenerative oxidation of ferrous ions in Fe2+/O2 cells to regenerate ferric ions for further use is demonstrated and some results for a hybrid type laboratory-scale reactor are presented. The use of graphite particle, packed-bed anodes for ferrous oxidation with gas diffusion type cathodes for oxygen reduction enables these cells to produce ferric ions at moderate current densities and low cell voltages in sulphuric acid solutions. These cells which utilize the rapid electrochemical, ferrous oxidation rate on graphite catalytic electrodes without any need for an external power source have potential application in hydrometallurgical leaching systems as well as in sulphur dioxide cleanup processes which incorporate the use of ferric ions. Continuous feed stream operation under mild conditions is a special advantage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00243345
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    107. Zur Bedeutung von Mischprozessen bei der Konditionierung von Schlämmen (1994)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 66 (1994), S. 1223-1223 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.3306609108
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    Paper (German National Licenses)
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