Extraction/spectrophotometric determination of drugs of quaternary ammonium salts based on ion association between an anionic dye and quaternary ammonium ions.

Quaternary ammonium amalgams as Zintl ion salts and their use in the synthesis of novel quaternary ammonium salts.

dodecapeptide 5 does not seem to follow this trend, which may suggest that secondary interactions exist between the terpenoid and peptide moieties. Although we still need to perform many experiments to develop a reliable mechanistic model to explain the observed phenomenon, our preliminary observations show an interesting potential in this area and investigation along this line is in progress i...

Microwave synthesis of quaternary ammonium salts.

The microwave synthesis of several quaternary ammonium salts is described. The synthesis provides comparable or better yields than published methods with reduced reaction times and in the absence of solvent.

Antibacterial activity of gemini quaternary ammonium salts.

A series of gemini quaternary ammonium salts (chlorides and bromides), with various hydrocarbon chain and spacer lengths, were tested. These compounds exhibited antibacterial activity against both Gram-positive and Gram-negative bacteria and were not mutagenic. The strongest antibacterial effect was observed for TMPG-10 Cl (against Pseudomonas aeruginosa ATCC 27853) and TMPG-12 Br (against Stap...

Interaction of quaternary ammonium and phosphonium salts with photosynthetic membranes.

Distinct concentration ranges of selected quaternary ammonium and phosphonium salts were elaborated to induce stimulatory or inhibitory effects, respectively, on photosynthetic reactions. By means of fluorescence induction measurements 3 different effects of alkylbenzyldimethylammonium chloride (ABDAC; zephirol) in chloroplast preparations from Pisum sativum were observed. 60 microM ABDAC produ...

Testing quaternary ammonium germicides.