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  • Electronic Resource  (15)
  • 1985-1989  (15)
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  • Electronic Resource  (15)
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  • 1
    Electronic Resource
    Electronic Resource
    The capacity of various types of immunoglobulin for intravenous use to interact with Fc receptors of human monocytes and macrophages (1986)
    Springer
    Annals of hematology 53 (1986), S. 321-332 
    Details
    ISSN: 1432-0584
    Keywords: Monocytes ; Macrophages ; Fc receptors ; Intravenous Immunoglobulin ; Phagocytosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The capacity of immunoglobulin for intravenous application (IgG-IV) to interact with Fc receptors of human monocytes and macrophages was tested by quantifying the inhibition of phagocytosis of IgG-sensitized erythrocytes. To this end a spectrometric phagocytosis test has been used. When compared with IgG for i.m. use (IgG-IM), all IgG-IV had reduced activity. This reduction was related, in part, to the reduced amount of IgG dimers and polymers in IgG-IV. On a weight basis dimeric IgG and polymeric IgG exerted 6-fold and 14-fold higher activity, respectively, than monomeric IgG. When this difference was corrected for, chemically modified IgG-IV still had significantly reduced inhibitory activity; DEAE-Sephadex-treated IgG and acid-treated IgG had an activity similar to IgG-IM, and PEG-treated IgG showed a slightly reduced activity. Pepsin-treated IgG was 〉100-fold less active than IgG-IM. The reactivity of IgG-IV with monocyte and macrophage Fc receptors was closely correlated. The most conspicuous differences found were related to the concentration at which IgG was used. Thus, β-propiolactone-treated IgG and plasmin-treated IgG were found to have significantly reduced activity at concentrations 〉20 μg/ml, but almost normal activity when used at lower concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00320892
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  • 2
    Electronic Resource
    Electronic Resource
    Adsorption of fibronection to Teflon followed byS. aureus adherence (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 90-90 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01975915
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  • 3
    Electronic Resource
    Electronic Resource
    Studies in heavy ion activation analysis (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 90 (1985), S. 349-354 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Both7Li and10B induced radioactivation were applied to trace determination of hydrogen via the1H(7Li,n)7Be and1H(10B, α)7Be reactions. In both cases, boron and magnesium present nuclear interferences, but their extent does not exceed 0.5%. At the bombarding energies used, 21 MeV7Li++ and 27 MeV10B++ the detection limits are respectively 2 and 0.5 ppm for an iron matrix irradiated for two hours. Due to the recoil of7Be, the samples were carefully prepared to avoid superficial hydrogen contamination. A series of samples which hydrogen content ranges from 15 to 120 ppm was examined, and the results obtained with the two beams were compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02060791
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  • 4
    Electronic Resource
    Electronic Resource
    99mTc-1,7-bis (2-pyridyl)-2,6-diazaheptane (DPTN) complexes: Production yield and stability in slightly basic media (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 92 (1985), S. 237-246 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The reduction of99mTc by SnCl2 in the presence of 1,7-bis (2-pyridyl)-2,6-diazaheptane (DPTN) has been investigated in borate buffer solutions with pHs ranging from 6.7 to 9.5. The resulting cationic, neutral and anionic complexes, in addition to TcO2 and TcO 4 − impurities, were separated by high voltage paper electrophoresis. The cationic complex turned into neutral and then into an anionic form via hydrolysis. These three species were also separated by gel filtration on a Bio-Gel P-2 column; their formation yields, stability, and the rate of their hydrolysis are presented as a function of the pH, and the results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02219753
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  • 5
    Electronic Resource
    Electronic Resource
    Studies in heavy ion activation analysis (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 88 (1985), S. 369-377 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract 7Li induced radioactivation was used for the trace determination of hydrogen via the1H(7Li, n)7 Be reaction. At 21 MeV7Li, only boron and magnesium present small nuclear interferences. An activation curve has been established by bombarding a stack of thin mylar foils. The comparison of this curve with the excitation function for the forward reaction, namely7Li(p, n)7 Be, shows that the recoil range from the superficial hydrogen atoms is only 1.7 mg·cm−2, allowing post-irradiation etching. Hydrogen has been determined in titanium and lead bronze at the 100 ppm level with a relative precision of 6 to 10%. Studies of 32 potential interfering elements suggest the extension of Li activation to the trace determination of Na[23Na(7Li,6Li)24Na] and K[39K(7Li, d)44m,44Sc].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037013
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  • 6
    Electronic Resource
    Electronic Resource
    Trace determination of beryllium by heavy ion activation analysis (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 119 (1987), S. 477-487 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A novel procedure for measuring the concentration of trace beryllium in different samples has been studied using11B heavy ion activation analysis. The specific reaction,9Be/11B, 2n/18F, is sensitive and selective when using a 10 MeV11Be3+ bombardment energy. The detection limit for a nondestructive analysis is 0.1 ng for a 2 h irradiation in a μA cm−2 beam current. A precision of 12% was achieved at the 50 μg g−1 level. Beryllium has been determined in a standard beryllium-copper alloy NBS-SRM C1123. Glass samples containing up to 61 trace elements were also analyzed nondestructively. When using a clean vacuum irradiation chamber, the technique might allow ultra-trace determinations, dealing with solid samples of a few milligrams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261210
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  • 7
    Electronic Resource
    Electronic Resource
    Studies in heavy ion activation analysis (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 122 (1988), S. 115-128 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract 15N induced radioactivation was used to study the possible trace determination of light elements with 1≤Z≤17. 55 nuclear reactions were investigated with ion beam energies ranging from E1ab=10 MeV to E1ab=30 MeV. Three elements were found to be determinable non-destructively, selectively and sensitively: Li, Be and Mg. Nuclear interferences have also been defined and quantified. The technique has been tested by analyzing NBS standards. Finally, Li and Be have been determined in glass samples and Mg in various types of alumina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037170
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  • 8
    Electronic Resource
    Electronic Resource
    Studies in heavy ion activation analysis trace determination possibilities with9Be bombardment (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 116 (1987), S. 401-408 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract 9Be induced radioactivation was used to study the trace determination of 19 elements at 3 different ion beam energies (Elab=14, 32 and 63 MeV9Be2+). Nine nuclear reactions, yielding radionuclides with half-lives longer than 2.5 m, present potential analytical features. Beside the very sensitive detection of B and N, the multielemental determination of Na, Si, Ca, Sc, and Zn is possible with a9Be ion beam of appropriate incident energy. Nuclear interferences have also been investigated and quantified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035784
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  • 9
    Electronic Resource
    Electronic Resource
    95mTc decay in M2 TcX6 solid matrices, frozen solutions and aqueous solutions (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 120 (1988), S. 167-174 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The influence of matrix physical state on the95mTc decay in M2 99(95m)TcX6 has been studied. In the solid, the95gTc retention was constant (83%) independently of the matrix amount up to a limiting value of the95mTcF 6 2− /K2 99TcF6 ratio. Then the decrease of matrix amount led to a decrease of the95gTc retention to 34%. This value remained constant upon further decrease of the matrix. In frozen solutions, the95gTc retention was found to be 18–20% independently of the type of compounds and their concentrations up to 10−2 M. In the same range of salt concentrations, the retention in solution was found to be 3%. The increase of salt concentration to 2·10−2 M led to an increase of retention in frozen solutions but did not affect its value in solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037864
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  • 10
    Electronic Resource
    Electronic Resource
    Aquation of K2 TcBr6 in dilute acid solutions (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 120 (1988), S. 175-183 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The photochemical aquation of K2 TcBr6 in 2M HRr, 1M HClO4 and 1M H2SO4 has been studied. The absorption spectra of the various Tc(IV) species were measured after the electrophoretic separation. The spectrophotometric changes and the yield of each species as a function of the UV irradiation time were determined. After 25 hours of irradiation of HBr and HClO4 solutions the main species were the cationic ones (∼80%) but in H2SO4 solution the neutral species reached a yield of 90%. The oxidation of Tc(IV) species to TcO 4 − proceeded more rapidly and extensively in HClO4 than in HBr and H2SO4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037865
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