Synthesis [edit]. Quaternary ammonium compounds are prepared by the alkylation of tertiary amines with a halocarbon. In older literature this is often called a Menshutkin reaction, however modern chemists usually refer to it simply as quaternization.uaternary ammonium compounds have also been shown to have antimicrobial activity. Certain quaternary ammonium compounds, especially those containing long alkyl chains, are used as antimicrobials and disinfectants.
Answer: XPF files are Uncommon Files primarily associated with XaoS Position File (Jan Hubicka Thomas Marsh Zoltan Kovacs and Others).
Related Topics: What is an edf file and how do I open an edf file? The EDFExplorer software can be used to create, view and edit the content of an ESRF data file, and these files are stored in the EDF format. Plain text content is usually stored in these EDF files, though binary data can also be entered by the author of the EDF document.