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  • electrodeposition  (3)
  • ketoprofen  (2)
  • Ni– P alloys  (1)
  • Rheumatoid arthritis  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Electrodeposition of zinc–nickel alloys from ammonia-containing baths (1999)
    Springer
    Journal of applied electrochemistry 29 (1999), S. 1035-1044 
    Details
    ISSN: 1572-8838
    Keywords: ammonia ; cyclic voltammetry ; electrodeposition ; gas–liquid equilibria ; speciation diagrams ; zinc–nickel alloys
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract This paper describes the use of ammonia-containing baths for Zn–Ni alloy electrodeposition. Buffering properties of the ammonia/ammonium couple limit the local change in pH in the vicinity of the electrode surface caused by simultaneous hydrogen evolution. In addition, it is shown that the divalent zinc and nickel species exist in the form of Zn(NH3) 4 2+ and Ni(NH3) 6 2+ complexes over a large pH range. The electrochemistry of the deposition at pH 10 was investigated by galvanostatic experiments and cyclic voltammetry, and compared with deposition from ammonium chloride baths at pH 5. The Ni content in the alloys were found to be 40–60% higher from the ammonia-containing bath than from the acidic baths. Reduction of divalent ions and hydrogen evolution were shown to occur at potentials 250 mV more cathodic than with baths at pH 5; the deposition mechanism may be affected by complexation of the metal cations by ammonia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003610617785
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  • 2
    Electronic Resource
    Electronic Resource
    Electrodeposition of Ni–Co alloys from sulfamate baths (2000)
    Springer
    Journal of applied electrochemistry 30 (2000), S. 277-284 
    Details
    ISSN: 1572-8838
    Keywords: galvanostatic deposition ; impedance spectrocopy ; nickel–cobalt ; electrodeposition ; rotating cylinder hull cell ; sulfamate bath
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The paper describes the results of electrochemical investigations of Ni–Co deposition from a sulfamate bath in the presence of boric acid and two additives. The individual deposition of nickel was shown to be partly inhibited by the adsorption of sulfamate ions at low polarization; such inhibition was not observed for cobalt. The introduction of saccharin at 100 ppm, with a wetting agent seems to hinder sulfamate adsorption and Ni deposition departs at less cathodic potentials. The presence of cobalt has no effect on nickel deposition, whereas cobalt deposition is hindered by the presence of nickel in the bath. Galvanostatic deposition was carried out at the surface of a RDE and with a rotating cylinder Hull cell. At low current densities deposits with a Co content of approx. 40% were produced, but this content was shown to decrease with the applied current density. Examination of experimental data showed that cobalt deposition is diffusion-controlled and that Co content decreases with the applied current density relative to the limiting current density.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003938310824
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  • 3
    Electronic Resource
    Electronic Resource
    Thermal effects of a laser beam on the electrodeposition of Ni–P alloys (1997)
    Springer
    Journal of applied electrochemistry 28 (1997), S. 80-88 
    Details
    ISSN: 1572-8838
    Keywords: Ni– P alloys ; electrodeposition ; acetate electrolyte ; hypophosphite ; continuous and pulsed laser ; thermal effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The paper deals with the effects of an incident laser beam on electrodeposition of Ni–P alloys from dilute acetate solutions. The kinetics of separate reductions of Ni2+ and H2PO−2 species were first investigated by linear sweep voltammetry, varying the hypophosphite concentration and the solution temperature: comparison of the kinetically limited current densities of the two reductions suggested that increasing temperature might reduce the significance of P codeposition. This tendency was confirmed by deposition runs carried out at controlled current. Deposition performance was discussed in terms of faradaic yield and deposit properties, namely P content together with the aspect and the structure of the alloys. Use of a continuous or pulsed laser beam was shown to reduce the P content in the deposit at high current densities; in some cases, amorphous structures were replaced by more crystalline forms with assistance of a laser beam.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003253903124
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of food on the systemic availability of ketoprofen (1988)
    Springer
    European journal of clinical pharmacology 33 (1988), S. 643-645 
    Details
    ISSN: 1432-1041
    Keywords: ketoprofen ; food ; bioavailability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary We have studied the pharmacokinetics of ketoprofen, a non-steroidal anti-inflammatory drug, in 12 patients after a single 100 mg oral dose both in fasting conditions and with a meal. Food significantly affected the peak plasma concentration of ketoprofen and decreased its absorption rate. However, the extent of absorption of ketoprofen, as reflected by the area under the plasma concentration time curve, appeared to be unchanged in the presence of food.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00542503
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  • 5
    Electronic Resource
    Electronic Resource
    Diffusion of intramuscular ketoprofen into the cerebrospinal fluid (1985)
    Springer
    European journal of clinical pharmacology 29 (1985), S. 319-321 
    Details
    ISSN: 1432-1041
    Keywords: ketoprofen ; diffusion ; cerebrospinal Fluid ; CSF level ; protein binding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Serum and cerebrospinal fluid (CSF) concentrations of ketoprofen have been measured in 36 patients hospitalised for sciatica. Diagnostic lumbar puncture was done 15 min to 13 h after a single 100 mg intramuscular dose of ketoprofen. Serum and CSF were sampled at the same time. Free serum concentrations were determined by equilibrium dialysis. Total and free concentrations were assayed by a highly sensitive and specific HPLC method. Ketoprofen rapidly crossed the blood-brain barrier and was detected in CSF 15 min after its administration. The rapid diffusion can be explained by the high lipid solubility of the drug. The CSF level was in equilibrium with the free serum concentration from the second to the 13th hours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00544088
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  • 6
    Electronic Resource
    Electronic Resource
    Sodium naproxen: concentration and effect on inflammatory response mediators in human rheumatoid synovial fluid (1994)
    Springer
    European journal of clinical pharmacology 46 (1994), S. 3-7 
    Details
    ISSN: 1432-1041
    Keywords: Naproxen ; Synovial fluid ; Rheumatoid arthritis ; NSAIDs ; eicosanoid ; concentration/effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Twelve patients suffering from rheumatoid arthritis and having swollen knees were treated with 1.1 g/day of sodium naproxen administered in one dose, daily for 5 days. The 72-h wash-out period was verified by the absence of any nonsteroidal anti-inflammatory drug using a HPLC screening. Blood and synovial fluid samples were drawn just before treatment and 24 h after the last dose. Eicosanoids (PGE2, 6-keto-PGF1α, TXB2, LTB4, LTC4) in synovial fluid were determined by immunoenzy-matic assays. In plasma and synovial fluid, hyaluronic acid was assayed by radiometric assay and sodium naproxen by HPLC. Free drug was determined by equilibrium dialysis. Statistical analysis used nonparametric tests. Pain relief (evaluated on a visual scale), morning stiffness, and scores on the Lee and Ritchie indices all decreased significantly, as did PGE2 and LTB4 concentrations. The decrease in 6-keto-PGF1α and TXB2 was not significant. No significant change was found for LTC4 and hyaluronic acid. Total concentrations of sodium naproxen were equivalent in plasma (16.1 μg·ml−1) and synovial fluid (18.9 μg·ml−1). Free fractions were significantly higher in synovial fluid (0.14%) than in plasma (0.11 %), as shown by binding of the drug to human serum albumin, at various protein concentrations. Interestingly, the clinical efficacy, as shown by decreases in morning stiffness and in the Lee index score, correlated with the free concentration of naproxen in synovial fluid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00195907
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