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  • 11
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The longitudinal momentum spectra of mesons produced in the projectile fragmentation region ofK − p interactions at 110 GeV/c, measured in a bubble chamber experiment, are compared to two fragmentation models related to hadron production by incident leptons. The models give a qualitative description of the data. However, it is found that the mesons having a valence quark in common with the projectile tend to have higher momenta than predicted.
    Type of Medium: Electronic Resource
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  • 12
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 30 Patienten mit Antibiotika-assoziierter Colitis (PMC) wurde der Stuhl aufClostridium difficile und sein Cytotoxin untersucht. Bei drei Patienten waren Coloskopie oder Bariumeinlauf zur Absicherung der Diagnose einer PMC erforderlich, da der Befund der Sigmoidoskopie diagnostisch nicht weiterführte. Bei 27 der 30 Patienten waren Erreger und Cytotoxin nachweisbar; bei zwei der restlichen Patienten wurdeStaphylococcus aureus als Ursache für die PMC ausgeschlossen. 19 Patienten mitC. difficile-induzierter PMC wurden oral mit Vancomycin behandelt, 18 davon sprachen auf die Therapie an; doch trat nach Absetzen von Vancomycin bei sieben Patienten ein Colitis-Rezidiv auf. Diese Rezidive sprachen im allgemeinen auf eine nochmalige Vancomycinbehandlung an. Der Nachweis von Schleimhautplaques oder einer Pseudomembran ist der beste Nachweis für eine Beteiligung vonC. difficile. Der kulturelle Nachweis vonC. difficile in den Faeces und der Cytotoxin-Test sind wegen des Vorkommens von asymptomatischen Trägern in ihrem diagnostischen Wert eingeschränkt.
    Notes: Summary Thirty patients with antimicrobial agent-associated pseudomembranous colitis (PMC) were studied for the presence ofClostridium difficile and its cytotoxin in feces. Either colonoscopy or barium enema radiography was required in three patients for the diagnosis of PMC because of nondiagnostic findings at sigmoidoscopy. Both the organism and cytotoxin were detected in 27 of the 30 patients;Staphylococcus aureus was excluded as the cause of PMC in two of the remaining patients. Eighteen of 19 patients withC. difficile-induced PMC who were treated with oral vancomycin had a salutary response; seven patients, however, had a relapse of colitis following the discontinuation of vancomycin. In general, relapses of colitis responded to retreatment with vancomycin. The implication ofC. difficile as a cause of diarrhea is best achieved by the demonstration of colonic mucosal plaques or of a pseudomembrane. The value of fecal culture forC. difficile and cytotoxin assay is limited by the existence of asymptomatic carriers.
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 230 (1983), S. 197-203 
    ISSN: 1432-0878
    Keywords: Odontoblasts ; Denervation ; Glycoproteins ; Predentin ; 3H-Fucose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The present study was designed to determine the effects of denervation on glycoprotein synthesis in the predentinal matrix of the mouse incisor. The inferior alveolar nerve (IAN), superior cervical ganglion (SCG) or both (IAN+SCG) were unilaterally resected in adult mice with the contralateral side remaining intact as a control. Fourteen days after surgery and 4 h prior to killing, 0.2 mCi of 3H-fucose was injected intravenously and mandibles were processed for standard histological and autoradiographic techniques. Silver halide grains were counted over the predentin matrix for 2000 μm per tooth. The results showed that the IAN and SCG resection affected 3H-fucose incorporation into the predentinal matrix; however, the highest absolute mean grain counts occurred after IAN+SCG resection. SCG resection increased the amount of 3H-fucose incorporated into the predentinal matrix by 48%, that of IAN by 24% and that of IAN+SCG by 14% as compared to contralateral controls. These data indicate a regulatory role for the nervous system and a possible interaction of neural components in the control of glycoprotein synthesis by odontoblasts in the mouse incisor.
    Type of Medium: Electronic Resource
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  • 14
    ISSN: 1432-0878
    Keywords: Autoradiography ; 3H-proline ; Osteoblasts ; Sympathectomy ; Guanethidine-sulfate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Sympathectomy was carried out in rats by injections of guanethidine-sulfate from birth to 14 days of age. At 45 days of age, the activity of osteoblastic cells was monitored by 3H-proline autoradiography. Effectiveness of sympathectomy was verified by light-microscopic examination of superior cervical and celiac ganglia. Grain counts over periosteal osteoblasts of the femoral diaphysis and osteoblasts mesial to the first molar in the mandible demonstrated a significantly reduced uptake of 3H-proline in the sympathectomized rats. The data provide direct evidence of sympathetic influence on osteoblastic activity and suggest that sympathectomy may result in the loss of a trophic influence which is important in the regulation of osteogenesis.
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 19 (1981), S. 849-862 
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Generalized Rouse-Zimm equations are derived using a local equilibrium ansatz for the segment distribution function. The relaxation frequencies depend on excluded-volume effects and other interactions such as entanglement in semidilute solutions through exact static correlation functions. For the case of ring polymers general expressions are given for diffusion coefficients and mean-square displacements. By use of the “blob” model, explicit results are presented for a dilute good-solvent system.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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