Electrokinetic chromatography with micelles, polymeric and monomeric additives with similar chemical functionality as pseudo-stationary phases.

A comparison is made of the retention properties of additives applied as positively charged pseudo-stationary phases for electrokinetic chromatography of neutral analytes. All additives have a quaternary ammonium as functional group. The polymeric additive [poly(N,N,N',N'-tetramethyl-N-trimethylenehexamethylenediammonium), Polybrene] has a concentration of 2% (w/w) in the background electrolyte (acetate, pH 5.

Comparison of separation selectivity in capillary electrokinetic chromatography using a cationic linear polymeric pseudo-stationary phase or monomeric additives of similar structure.

The retention properties in electrically driven systems with monomeric additives were compared to an electrokinetic chromatographic system with a linear, charged polymer of similar chemical structure (all additives are quaternary tetraalkyl ammonium ions). The monomeric additives were tetramethylammonium (TMA), tetraethylammonium (TEA) and dimethylpyrrolidinium (DMP), respectively, the polymeric additive was poly(diallyldimethyl)ammonium (PDADMA). The additive concentration in the background electrolyte was 2 and 4% (w/w).

[Comparative epicutaneous study on allergy to mild-fibrosing agents].

In connection with clinical observations and literature data about allergic manifestations in the oral cavity in the treatment of periodontal pockets with mild-fibrosing agents, we performed a comparative epicutaneous study on the preparations most often used in our country: Phytodont, maraslavin, zemisvet and preparation P. The method of Jadahsson and Block was used in patients with manifested periodontosis. Positive allergic tests with zemisvet and preparation P have not been established so far, whereas they were 5.