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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 7 (1980), S. 0 
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 1. The interactions between five α-adrenoceptor blocking agents and clonidine have been studied in rats, rabbits and dogs after intracisternal injections.2. Dibozane, ethomoxane, azapetine, dibenamine and thymoxamine reduced blood pressure in rats and an antagonism of the hypotensive effects of clonidine was detected for the first four drugs.3. In rabbits, azapetine, dibenamine, dibozane and ethomoxane were hypotensive while thymoxamine had no effect on blood pressure. Dibozane and dibenamine reduced the hypotensive effect of clonidine.4. In dogs, azapetine, dibozane and ethomoxane reduced blood pressure, while dibenamine induced an increase in blood pressure and thymoxamine was without effect. Only dibenamine antagonized the blood pressure lowering effect of clonidine. A definite conclusion could not be drawn with azapetine due to its long duration of action in both rabbits and dogs.5. These results suggest that the central receptors involved in the hypotensive effect of clonidine differ from many other central receptors and vary according to the animal species. In addition the a-adrenoceptor blocking agents appear not to have a unique site and mechanism of action on central cardiovascular control.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 47 (1982), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Bush beans, kale and soybeans were used as models for studying the effects of processing by canning and freezing upon 51Cr and 65Zn content. Plants were grown hydroponically, intrinsically labeled with 51Cr and 65Zn, and processed either by canning or freezing. Freezing resulted in 65Zn losses of 10.7% for kale, 8.6% for bush beans, and 6.7% for soybeans. A loss of 3.8% of 51Cr resulted during freezing of bush beans. Canning resulted in 65Zn losses of 23% for kale, 19.7% for bush beans, and 28.8% for soybeans. Canned bush beans and kale contained 40.7% and 62.7% respectively, less 51Cr than unprocessed samples. Freezing resulted in a greater mineral retention than canning. Less opportunity for leaching is available in freezing and reduction in radionuclide content of the vegetables by canning was accounted for by transfer to the drained liquid.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 318 (1982), S. 288-294 
    ISSN: 1432-1912
    Keywords: Mianserin ; Clonidine ; Desipramine ; Acetylcholine ; α2-Adrenoceptors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The purpose of the present study was to characterize the effects of mianserin at α2-adrenoceptors. Firstly, the action of mianserin on postganglionic sympathetic fibres has been studied using the tachycardia induced by stimulation of the cardiac nerve in dogs. Mianserin increased this tachycardia, but could not prevent the inhibitory effect of clonidine in this model. However, an antagonistic effect of mianserin against clonidine was observed when animals were pretreated with desipramine. Secondly, mianserin antagonized the inhibitory effect of clonidine on the electrically stimulated guinea-pig ileum. In high concentrations, mianserin reduced both electrically and acetylcholine induced contractions. Thirdly, mianserin antagonised the sleep induced by clonidine in chickens. These results are consistent with α2-adrenoceptor blocking properties of mianserin in peripheral noradrenergic fibres in dogs, in cholinergic fibres in guinea-pig ileum and in the central nervous system in chickens.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 40 (1962), S. 921-928 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 40 (1962), S. 1175-1180 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 314 (1980), S. 83-87 
    ISSN: 1432-1912
    Keywords: Guinea-pig ileum ; Presynaptic α-adrenoceptors ; Clonidine ; Morphine ; α-Adrenoceptor blocking agents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The purpose of the present study was to further characterize the α-adrenoceptors located on parasympathetic fibres. Segments of guinea-pig ileum were stimulated by transmural electrical pulses, and the ensuing contractions, which are due to the release of acetylcholine from postganglionic parasympathetic fibres, were monitored. Clonidine and tramazoline, which are thought to act preferentially on presynaptic α-adrenoceptors, reduced the contractions, whereas phenylephrine and methoxamine, postsynaptic α-adrenoceptor agonists, were ineffective. Contractions induced by acetylcholine were not changed by clonidine but were abolished by atropine. Yohimbine, piperoxan, phentolamine and thymoxamine reversed or prevented the inhibitory effect of clonidine. Prazosin and AR-C239 did not antagonize this effect. The inhibitory effect of tramazoline was antagonized by piperoxan but not by AR-C239 or by prazosin. Naloxone did not alter the action of clonidine, and piperoxan did not change the inhibitory effect of morphine. In conclusion, these experiments suggest the presence on cholinergic postganglionic fibres of both opiate receptors and α-adrenoceptors. The latter appear to resemble more closely α1-adrenoceptors than α1-adrenoceptors.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 51 (1981), S. 9-16 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary The deflection of a plane turbulent jet in a crossflow is described by a model which takes the effects of entrainment as well as those of crossflow pressure into account. Using this model the centerline and the spread of the jet and the mean velocity averaged over its cross-section can be calculated. Asymptotic analytic solutions are given for the case where the velocity of the unperturbed crossflow is much smaller than that of the unperturbed jet. A comparison of the present calculations with experimental results of other authors shows good agreement.
    Notes: Übersicht Zur Beschreibung der Umlenkung eines ebenen turbulenten Freistrahles durch eine Querströmuug wird ein Modell entwickelt, bei dem sowohl die Einsaugwirkung des Strahles als auch die Druckwirkung der Querströmung auf den Strahl berücksichtigt werden. Hiermit können die Strahlmittellinie, die Strahlbreite und die über einen Strahlquerschnitt gemittelte Geschwindigkeit berechnet werden. Es werden analytische Näherungslösungen für die Fälle angegeben, in denen die Geschwindigkeit der ungestörten Querströmung wesentlich kleiner als diejenige des ungestörten Strahles ist. Ein Vergleich der berechneten Größen mit experimentellen Ergebnissen anderer Autoren zeigt gute Übereinstimmung.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 40 (1984), S. 1096-1098 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 57 (1982), S. 275-281 
    ISSN: 1432-0533
    Keywords: Spinal cord ; Conus medullaris ; Mixed chemodectoma and ganglioneuroma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Report of a 33-year-old man with a yearlong historory of low-back pain radiating into the left leg. Neurologic examination upon admission tto the hospital revealed a spinal compression syndrome at the lovel L5. Laminectomy at L4/5 revealed an encapsulated intradural tumor measuring 4×2.5×2.5 cm. The tumor was attached to the dorsal root L4 and extended downward to the conus region. Light and electron microscopy revealed features mostly consistent with a mixed chemodectoma and ganglioneuroma.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 25 (1981), S. 195-200 
    ISSN: 1432-0630
    Keywords: 77
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Thin sections in the thickness range down to 3–5 μm were produced from bariumtitanate ferroelectric ceramics. The small signal dielectric constant, as well as hysteresis loops were measured. Significant deviations from the bulk properties were observed, when the thickness of the sample was decreased to the average diameter of the grains. The measured results are discussed proposing a model with internal stresses and a distorted surface layer.
    Type of Medium: Electronic Resource
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