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  • 1
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 142 (1967), S. 0 
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 308 (1979), S. 61-65 
    ISSN: 1432-1912
    Schlagwort(e): Acethylcholine ; Choline ; Turnover ; Mouse brain ; Striatum ; Physostigmine ; Atropine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The effect of physostigmine salicylate (0.5 mg/kg, i.p.) alone and in combination with atropine sulfate (25 mg/kg, i. p.) on levels of acetylcholine (ACh) and choline (Ch) and turnover of ACh has been studied in whole brain and striatum of mice. The animals were killed by focussed microwave irradiation and the turnover of ACh was studied after i.v. injection of deuterium labelled Ch by employing mass fragmentography. Physostigmine increased the levels of ACh in whole brain from 24.5–28.0 nmol/g (P〈0.001) whereas there was no significant increase in striatum. The levels of Ch were also increased. The turnover rate of ACh was decreased in whole brain from 15.4 to 8.4 and in striatum from 52.9 to 24.4 nmol/g · min. Physostigmine given before or after atropine did not completely block the ACh lowering effect of atropine. When atropine was given before physostigmine the turnover rate of ACh in whole brain was increased to 24.2 nmoles/g · min. The results seem to indicate that there is no clear cut relation between the turnover rate and level of ACh in vivo. The increase of the turnover rate induced by atropine is masked unless a cholinesterase inhibitor is given to protect the newly synthesized labelled ACh released by atropine.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Archives of toxicology 55 (1984), S. 70-75 
    ISSN: 1432-0738
    Schlagwort(e): Soman ; Gas chromatography ; Mass spectrometry ; Cholinesterases ; Aliesterase ; Phosphorylphosphatase ; Toxicity ; Stereoselectivity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The fate of the four stereoisomers of soman [0-(1,2,2-trimethylpropyl)-methyl-fluoro phosphonate] has been studied a) in vivo in mouse blood and liver after IP injection of 0.75 × LD50 Rc- and Sc-soman respectively, and b) in vitro upon incubation wih acetyl- und pseudocholinesterase, aliesterase and phosphorylphosphatase. The analytical method used is based on gas chromatography — mass spectrometry with deuterated internal standard. Most soman disappeared very rapidly from blood and liver. In liver, SCRP and RCRP, the two isomers that preferentially react with cholinesterase, could be detected. The level of SCRP, which was higher than that of RCRP, could be followed for 17–18 h. In blood only SCRP could be detected. The amounts found were fairly constant during the time period 2 min to 4h, and it could even be detected 17–18 h after soman administration.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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