Abstract: An antimicrobial composition that includes: an antimicrobial component having at least one quaternary ammonium compound; a synthetic polymer that includes: at least one cationic monomer Ab, optionally, at least one anionic monomer Ba, and optionally, at least one non-ionic monomer Ca; an organic acid; at least 20 wt. % of an organic polar solvent, preferably at least 30 wt. % of an organic polar solvent, based on a total weight of the composition; and a surfactant selected from cationic surfactants, amphoteric surfactants and combinations thereof, wherein the composition is free of non-ionic surfactants and the composition has a pH of at least 7. This composition when applied to a surface provides a combination of “quick-kill” efficacy and robust long lasting disinfection.

Abstract: An antimicrobial composition that includes: an antimicrobial component having at least one quaternary ammonium compound; a cationic polysaccharide; an organic acid; and a surfactant selected from cationic surfactants, amphoteric surfactants, nonionic surfactants and combinations thereof. This composition when applied to a surface provides robust long lasting disinfection.

Abstract: An antimicrobial composition that includes: an antimicrobial component having at least one quaternary ammonium compound; a cationic polysaccharide; an organic acid; and a surfactant selected from cationic surfactants, amphoteric surfactants, nonionic surfactants and combinations thereof. This composition when applied to a surface provides robust long lasting disinfection.

Abstract: An antimicrobial composition that includes: an antimicrobial component having at least one quaternary ammonium compound; a cationic polysaccharide; an organic acid; and a surfactant selected from cationic surfactants, amphoteric surfactants, nonionic surfactants and combinations thereof. This composition when applied to a surface provides robust long lasting disinfection.

Abstract: The disclosed methods and device 26 for time-keeping precisely calculate data relating to the center of the Milky Way galaxy. A method of time-keeping includes determining a direction of the galactic center at a desired time, and at least one of the rise time, rise azimuth, and current elevation angle of the galactic center is calculated. Determining the direction may include calculating the coordinates of the galactic center in a celestial coordinate system of a predetermined ephemeral date. These coordinates are then transformed to a celestial coordinate system of the desired time. The transforming may include accounting for the precession of the equinox, the precession of the ecliptic plane, and variation of obliquity to the ecliptic. An indicator of the rise time 28, the rise azimuth 30 and/or the current elevation angle 32 is then displayed. The rise time, the rise azimuth and the current elevation angle may be determined for a desired position on Earth.