Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Chemistry  (3)
  • Acetylcyanamide  (1)
  • Azathioprine  (1)
  • Best. von Arsen in Biolog. Material  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Research in experimental medicine 181 (1982), S. 19-25 
    ISSN: 1433-8580
    Keywords: Gas chromatography ; Serum level ; Azathioprine ; 6-Mercaptopurine ; Immunosuppression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The knowledge of serum levels of azathioprine or its metabolite 6-mercaptopurine is important for the monitoring of the immunosuppressive therapy after kidney transplantation, especially when kidney function is low. For this reason, the work of Bailey et al. was modified. 6-Mercaptopurine was extracted from the serum with a mixture of isopropanol-ethylacetate (1:1 v:v), derivatized with trimethylaniliniumhydroxyde and measured gaschromatographically. Sulfhydryl-protecting reagents were added to prevent loss of substance. Oxyethyltheophylline was used as the internal standard. The extraction and clean-up method recovered 80% of the 6-mercaptopurine present, the lower limit of sensitivity was 20 ng/ml, i.e., ten times lower than that of Bailey et al. The method could be realized on eight patients treated with azathioprine, the half life of the drug was about 20–40 min within the first hour after i.v. application.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1432-0738
    Keywords: Hydrogen cyanamide ; Rat ; Human ; Metabolism ; Urinary excretion ; Acetylcyanamide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The main urinary metabolite of hydrogen cyanamide (syn.: cyanamide) in rat and man is acetylcyanamide (syn.: N-acetylcyanamide). An analytical method was developed to determine acetylcyanamide in the urine with a limit of quantification of 〈10 μg/l (mean recovery 96.1 % using spikes of 20 μg/l; relative standard deviation 〈4%). This methodology is based upon ion chromatography using column-switch techniques and UV detection. It could be demonstrated that in rats an average of 45.6% of oral applied cyanamide (10 mg/kg) was excreted in the urine as acetylcyanamide. In male human volunteers a mean of 40% of oral administered cyanamide (mean dose 0.25 mg/kg body weight) was excreted via the urine as acetylcyanamide. The same group of volunteers participated in a skin absorption study with dermal application of the above cyanamide dose onto a skin surface area of 32 cm2. Within an application period of 6 h an average cyanamide quantity of 2.3 mg was available for skin absorption. A mean portion of 7.7% of this quantity was found as acetylcyanamide in the urine of the participants. Findings from literature state that cyanamide is metabolized in vitro to cyanide. According to examinations performed in vivo, however, such a metabolic pathway seems to be irrelevant for man. In comparison with the control values there was no significant increase of both the cyanide concentrations in the blood and the thiocyanate concentrations in the urine of the above volunteers after the described oral cyanamide administration.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 304 (1980), S. 141-142 
    ISSN: 1618-2650
    Keywords: Best. von Arsen in Biolog. Material ; Spektrometrie, Atomabsorption ; Graphitrohrküvette, Hydridtechnik
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 43 (1930), S. 747-749 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 22 (1909), S. 1641-1642 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 144. Synthesis and Properties of the Hexaphospha-3-germaspiro[2.4]heptane (t-BuP)2Ge(t-BuP)4The cyclocondensation of K(t-Bu)P—P(t-Bu)K with germanium tetrachloride in the molar ratio of 2:1 yields the novel spirocyclic compound 1,2,4,5,6,7-hexa-tert-butyl-1,2,4,5,6,7-hexaphospha-3-germaspiro[2.4]heptane, (t-BuP)2Ge(t-BuP)4 (1). Besides considerable amounts of (t-BuP)4 are formed and occasionally some (t-BuP)3 can be found. 1 could be isolated in the pure state and has been NMR-spectroscopically characterized as a spirocyclic compound with a P2GeP4 skeleton.
    Notes: Bei der Cyclokondensation von K(t-Bu)P—P(t-Bu)K mit Germaniumtetrachlorid im Molverhältnis 2:1 wird die neue Spiroverbindung 1,2,4,5,6,7-Hexa-tert-butyl-1,2,4,5,6,7-hexaphospha-3-germaspiro[2.4]heptan, (t-BuP)2Ge(t-BuP)4 (1), gebildet. Daneben entstehen beträchtliche Mengen an (t-BuP)4 sowie gelegentlich etwas (t-BuP)3. Verbindung 1 konnte in reiner Form isoliert und kernresonanzspektroskopisch als Spirocyclus mit P2GeP4-Ringgerüst charkterisiert werden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...