Wynik wyszukiwania w bazie Polska Bibliografia Lekarska GBL

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Tytuł oryginału: Kinetics of talampicillin decomposition in solutions.
Autorzy: Pawełczyk Ewaryst, Płotkowiak Zyta, Helska Maria
Źródło: Acta Pol. Pharm. 2002: 59 (1) s.25-29, tab., bibliogr. 9 poz.
Sygnatura GBL: 301,378

Hasła klasyfikacyjne GBL:
  • farmacja

    Typ dokumentu:
  • praca doświadczalna
  • tytuł obcojęzyczny

    Streszczenie angielskie: Talampicillin stability in aqueous solutions was studied in a broad range of pH values using as medium solutions of hydrochloric acid (pH 0.4 - 1.8), phosphate buffers (pH 2.05 - 3.13 and 6.03 - 8.04), acetate buffer (pH 3.87-5.28) and borate buffer (pH 8.90 - 9.10) as well as sodium hydroxide solution (pH 11.48). For the determination of talampicilin concentration changes in kinetic studies, two methods were used: iodometric and spectrophotometric in UV(lambdamax = 254.5 nm). The catalytic velocity constans (kh+, kx, ko) were established, the log k-pH profile (35řC) was found, thermodynamic parameters were calculated of the hydrolisis reaction of the á-lactam bond (kH+: EA=67.9 kJ mol**-1, Delta S"= -92.4 JK**-1 mol-1, Delta G"=92.6 kJ mol**-1; kx:EA = 31.8 kJ mol**-1, Delta S" = 347.1 JK**-1 mol**-1, Delta G" =131.1 kJ mol**-1...

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    Tytuł oryginału: Sterility and antibacterial activity of some antibiotics sterilized by irradiation.
    Autorzy: Muszyński Zygmunt, Długaszewska Jolanta, Marciniec Barbara, Płotkowiak Zyta, Popielarz-Brzezińska Maria, Ogrodowczyk Magdalena
    Źródło: Acta Pol. Pharm. 2002: 59 (6) s.433-435, tab., bibliogr. 13 poz. - 3 Multidyscyplinarna Konferencja nt. badań nad lekami Piła 13-16.05. 2002
    Sygnatura GBL: 301,378

    Hasła klasyfikacyjne GBL:
  • mikrobiologia
  • farmacja

    Typ dokumentu:
  • praca związana ze zjazdem
  • praca doświadczalna
  • tytuł obcojęzyczny

    Streszczenie angielskie: Sterility and antibacterial activity of several antibiotics (including some penicillins and their salts, gramicidin and neomycin) subjected to sterilization by irradiation has been studied. The compounds in solid phase have been exposed to gamma irradiation in air atmosphere at room temerature, with a dose of 25 kGy, and afterwards they have been subjected to tests recommended by FP V (volume I, 1990) checking their sterility and activity. The results have shown that the majority of initial compounds have been to a slight degree contaminated by bacteria from the genera Bacillus and Micrococcus, the number of bacteria did not exceed 10ý CFU, and fungi up to 10 CFU in 1 g of the compouned. All compounds subjected to sterilization with a dose of 25 kGy were sterile and preserved the activity required by FP V. The decrease in activity observed for some compounds was always within the limits of FP specification. The results have proved that the penicillins analysed, gramicidin and neomycin can be sterilized by irradiation with a dose of 25 kGy, without any detrimental effect on their properties and antibacterial activity.

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