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Quaternary |
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quaternary 1. Chem containing or being an atom bound to four other atoms or groups 2. Maths having four variables Quaternary 1. of, denoting, or formed in the most recent period of geological time, which succeeded the Tertiary period nearly two million years ago 2. the. the Quaternary period or rock system, divided into Pleistocene and Holocene (Recent) epochs or series Quaternary [′kwät·ən‚er·ē] (geology) The second period of the Cenozoic geologic era, following the Tertiary, and including the last 2-3 million years. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Attached to the nanoparticles are molecules called quaternary ammonium compounds. You'll need a quaternary cleaner (a cleaner formulated with quaternary ammonium compounds that provide excellent cleaning and disinfection properties) registered with the EPA with a hepatitis B virus (HBV) claim that it can handle blood and other potentially infectious material (i. Quaternary ammonium compounds may contain added synthetic detergents for use as a one-step cleaner and disinfectant. |
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