Plastic polypropylene vials showed minimal BAK adsorption loss, outperforming glass vials, including premium and silanized types. Benzalkonium chloride (BAK) is a common preservative composed of ...

If you’re fortunate, all the flavors will be featured at this year’s holiday feasts—sweet, salty, sour, bitter, umami, and, perhaps, a sixth—ammonium chloride. If you’re celebrating in a Scandinavian ...

When writing chemical equations for reversible reactions, the usual one-way arrow is not used. Instead, two arrows are used, each with just half an arrowhead (⇌). The top one points right, and the ...

Share on Pinterest Researchers say the new sixth taste activates a strong sensation in receptors that detect sour tastes, which could be a survival mechanism. Rich Legg/Getty Images Researchers say ...

A cotton swab is dipped into concentrated hydrochloric acid (producing hydrogen chloride gas) while a second on is dipped into concentrated aqueous ammonia (producing ammonia gas). Both cotton swabs ...