Predmetom štúdia je formulácia lokálneho anestetika – trimekaín a antimykotika – terbinafín do hydrogélov s optimálnymi tokovými vlastnosťami. Ako gélotvorné látky boli vybrané deriváty celulózy: hydroxyetylcelulóza a hydroxypropylcelulóza. Hodnotili sa vzorky pripravené v rôznych kombináciach a koncentráciach tak, aby bola viskozita hydrogélu čo najvhodnejšia s ohľadom na použitie. Na základe hodnotenia reologických vlastností sa ako vhodný gélotvorný základ pre lokálne anestetikum trimekaín osvedčila kombinácia 1% trimekaín a 2% hydroxyetylcelulóza, pre antimykotikum terbinafín to bola kombinácia 1% terbinafín a 3% hydroxypropylcelulóza.
The study was concerned with the formulation of the local anaesthetic agent trimecaine and the antimycotic agent terbinafíne into hydrogels possessing the optimal flow properties. The gelling agents were the cellulose derivatives hydroxyethyl cellulose and hydroxypropyl cellulose. The evaluation included the samples in various combinations and concentrations prepared in such a way to produce the most suitable hydrogel viscosity with regard to the intended use. On the basis of the evaluation of the rheological properties, the suitable gelling base for the local anaesthetic trimecaine proved to be the combination of 1% trimecaine and 2% hydroxyethyl cellulose, and for the antimycotic terbinafíne, the combination of 1% terbinafíne and 3% hydroxypropyl cellulose.
Technical polychlorinated byphenyl (PCB) preparations--Delors 103, 104, 105, and 106--produced in the former Czechoslovakia were analyzed for their chlorobiphenyl (CB), chloronaphthalene (PCN) and chlorinated dibenzofuran (PCDF) composition and content using high resolution gas chromatography-mass spectrometry techniques. The congener patterns of Delors 103, 104, 105, and 106 resembled Aroclors 1242, 1248, 1254, and 1260. Delors contained PCNs and PCDFs, as impurities, at microgram per gram concentrations. Concentrations of PCNs and PCDFs in Delors were greater than those found in the corresponding Aroclors. The potential for the emissions of PCNs and PCDFs from Delor was estimated to be 3680 and 860 kg, respectively. Non- and mono-ortho PCBs were the major contributors to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) equivalents in Delor mixtures.
- MeSH
- Benzofurans analysis MeSH
- Isomerism MeSH
- Environmental Pollutants analysis MeSH
- Naphthalenes analysis MeSH
- Gas Chromatography-Mass Spectrometry methods MeSH
- Polychlorinated Biphenyls analysis chemistry MeSH
- Publication type
- Journal Article MeSH
- Geographicals
- Czech Republic MeSH
