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  • 1
    ISSN: 1432-1920
    Keywords: Carbon monoxide poisoning ; Delayed carbon monoxide sequelae ; Proton magnetic resonance spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The pathogenesis of delayed sequelae of carbon monoxide (CO) exposure is still unknown. We repeatedly examined a 55-year-old woman with the interval form of CO poisoning, using proton magnetic resonance spectroscopy (MRS). When the clinical picture was severe, MRS revealed markedly lowered N-acetyl-asparatate (NAA)/creatine and phosphocreatine (Cr) ratio and slightly increased choline containing compounds (Cho)/Cr ratio. Subsequently, NAA and Cho/Cr ratio tended to return to normal, reflecting clinical improvement. Proton MRS shows the previously unrecognised neuronal activity in CO poisoning and precisely reflects the severity of symptoms. We stress the superiority of proton MRS over the conventional radiological examinations in CO poisoning.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Applied microbiology and biotechnology 42 (1994), S. 290-299 
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  The extracellular phospholipase D (PLD) gene from Streptomyces antibioticus was cloned, sequenced, and expressed in Escherichia coli. Analysis of DNA sequence data revealed a putative ribosome-binding site and an open reading frame encoding a 556-amino-acid protein that included amino acid sequences obtained from the purified enzyme. The protein was expressed in an insoluble form in E. coli, but reacted with antibody against PLD. After solubilization of the protein with guanidine-HCl and 2-mercaptoethanol, subsequent dialysis restored the PLD activity. Comparison of the nucleotide sequence data with the N-terminal protein sequence indicates that this secreted protein is synthesized as a larger precursor with a 47-amino-acid N-terminal extension to the mature enzyme of 509 amino acids. The amino acid sequence of the S. antibioticus PLD was extensively compared with other PLDs and phospholipase C (PLC). The deduced amino acid sequence of the cloned PLD was highly homologous to PLDs from S. acidomyceticus and Streptomyces sp., and contained a conserved region with S. chromofuscus PLD. From comparisons of the structural similarity and properties of the various PLDs, a classification of PLDs into two subgroups has been proposed and the highly conserved region designated tentatively region XP L D, which may be important in the catalytic function, has been identified. The homology comparison between our PLD and phosphatidylinositol-specific phospholipase C (PI-PLC) is also discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Applied microbiology and biotechnology 42 (1994), S. 290-299 
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The extracellular phospholipase D (PLD) gene fromStreptomyces antibioticus was cloned, sequenced, and expressed inEscherichia coli. Analysis of DNA sequence data revealed a putative ribosome-binding site and an open reading frame encoding a 556-amino-acid protein that included amino acid sequences obtained from the purified enzyme. The protein was expressed in an insoluble form inE. coli, but reacted with antibody against PLD. After solubilization of the protein with guanidine-HCI and 2-mercaptoethanol, subsequent dialysis restored the PLD activity. Comparison of the nucleotide sequence data with the N-terminal protein sequence indicates that this secreted protein is synthesized as a larger precursor with a 47-amino-acid N-terminal extension to the mature enzyme of 509 amino acids. The amino acid sequence of the S.antibioticus PLD was extensively compared with other PLDs and phospholipase C (PLC). The deduced amino acid sequence of the cloned PLD was highly homologous to PLDs from S. acidomyceticus andStreptomyces sp., and contained a conserved region with S.chromofuscus PLD. From comparisons of the structural similarity and properties of the various PLDs, a classification of PLDs into two subgroups has been proposed and the highly conserved region designated tentatively region XPLD, which may be important in the catalytic function, has been identified. The homology comparison between our PLD and phosphatidylinositol-specific phospholipase C (PI-PLC) is also discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    International journal of legal medicine 107 (1994), S. 21-24 
    ISSN: 1437-1596
    Keywords: Barbiturates ; Serum analysis ; GUMS (EI-SIM) ; Secobarbital therapy ; Barbiturate ; Serum-Analyse ; GC/MS (EI-SIM) ; Secobarbital-Therapie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Eine einfache und schnelle Methode zur Analyse von Barbituraten im Serum wurde entwickelt. Zur Probenaufarbeitung wurde eine Säulenextraktion mit Hilfe von Extrelut und Florisil angesetzt. Das Eluat wurde direkt analysiert mit Hilfe der GC/MS (EI-SIM). Als Ionen wurden die „base peaks” von 10 verschiedenen Barbituraten ausgewählt. Als interner Standard wurde Allobarbital oder Secobarbital verwendet. Innerhalb eines Bereiches von 0,5–5 ng wies die Eichkurve einen linearen Verlauf auf. Bei der Extraktion von gespeikten Serumproben, welche 20 μ1,5 ml und 5 μ1,5 ml enthielten, konnte eine Wiederfindungsrate von 87,2–105,2% und 81,6–104,6% gefunden werden. Phenobarbital stellt mit einer Wiederfindungsrate von 151,9% bzw. 172,1% eine Ausnahme dar. Die Secobarbital-Gehalte von 13 Patienten-Seren nach intravenöser Gabe von Secobarbital wurden analysiert. In 3 von 10 Fällen konnten Secobarbital-Spiegel von mehr als 1 μg/ml bei mehr als 72 Stunden zurückliegender Secobarbital-Gabe nachgewiesen werden. Die Methode scheint eine Möglichkeit zur klinischen Barbiturat-Spiegel-Bestimmung zu bieten.
    Notes: Abstract A simple and rapid method for analysis of barbiturates in serum has been developed. In order to extract and clean barbiturates in serum, a separation column packed with Extrelut and Florisil was used, and the eluate was directly analyzed by means of electron impact selected ion monitoring (EI-SIM). Selected ions used were base peak ions of 10 barbituartes, and the internal standard used was allobarbital or secobarbital. The calibration curves were linear over the range 0.5–5 ng. Extraction of replicate serum samples containing 20 μg/1.5 ml and 5 μg/1.5 ml resulted in a recovery of 87.2–105.2% and 81.6–104.6%, respectively, with the exception of phenobarbital, which was 151.9% and 172.1%, respectively. Secobarbital was also analyzed in the serum of 13 patients who had been given secobarbital intravenously. In 3 out of 10 cases, Secobarbital levels greater than 1 μg/ml were detected more than 72 h after administration. This method seems to have possibilities for clinical use.
    Type of Medium: Electronic Resource
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