Solvent Extraction of Antimony(V) as Hexachloroantimonate(V) with Quaternary Ammonium Ions.

Uptake of Some Quaternary Ammonium Ions by Human Erythrocytes

I N T R O D U C T I O N Biochemical a n d nu t r i t iona l studies l ong ago suggested t h a t a t least some of t h e cells w i th in the gastrointes t inal t r a c t a r e p e r m e a b l e to some q u a t e r n a r y a m m o n i u m ions. F o r example , w h e n chol ine was fed to ra t s its pa r t i c ipa t ion in the process of t r ansme thy la t i on wi th in tissues was shown (1). M o ...

Quaternary Ammonium Compounds as Water Channel Blockers

From the Department of Physiology, Nijmegen Center for Molecular Life Sciences, Radboud University Nijmegen Medical Center, 6500 HB Nijmegen, Nijmegen, The Netherlands, the Max-Planck Institute for Biophysical Chemistry, Theoretical and Computational Biophysics Department, Am Fassberg, D-37077, Göttingen, Germany, and the Department of Chemistry, University of Edinburgh, Kings Buildings, West M...

The Soret absorption band of isolated chlorophyll a and b tagged with quaternary ammonium ions.

We have performed gas-phase absorption spectroscopy in the Soret-band region of chlorophyll (Chl) a and b tagged by quaternary ammonium ions together with time-dependent density functional theory (TD-DFT) calculations. This band is the strongest in the visible region of metalloporphyrins and an important reporter on the microenvironment. The cationic charge tags were tetramethylammonium, tetrab...

Testing quaternary ammonium germicides.

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...