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.
References in periodicals archive ?
To achieve desired levels of surface disinfection, adoption of modern technologies like fogging with quaternary ammonium compounds in addition to high end cleaning with them is indicated to supplement traditional methods.
Comparitive efficacy of 3rd generation quaternary ammonium compounds and formaldehyde for fumigation of operation theatres.
It uncovers the facts that the function of both enzymes of Pseudomonas putida GB-1, function as oxidization of quaternary ammonium compounds.
The clay used here contained a large amount of long chain quaternary ammonium compounds, and at curing temperature, this compound can act as a plasticizer and result in a decrease of the ultimate torque.
Fate and effect of quaternary ammonium compounds on a mixed methanogenic culture.
4]), a quaternary ammonium compound that contains two antifungal activity groups (quaternary ammonium and boric tetrafluoride [B[F.
diphtheriae is frequent in tropical countries such as Mayotte, this bacterium could be exposed to quaternary ammonium compounds contained in disinfectants, hygienic hand washes, and cosmetic products.
Chemical manufacturers take the leftover grapefruit pulp, a waste by-product from grapefruit juice production and, in an intensive, multi-step industrial chemical process, change the natural phenolic compounds into synthetic quaternary ammonium compounds.
Disinfectants were chosen that contained quaternary ammonium compounds, alcohol, or sodium hypochlorite.
Biocidal ingredients in these products often are quaternary ammonium compounds (such as BZK) and triclosan.
Previous studies have shown that both quaternary ammonium compounds and triclosan can activate effluxpumps in bacteria that transfer plasmids containing resistance genes.
Previous studies have shown that both quaternary ammonium compounds and triclosan can activate efflux pumps in bacteria that transfer plasmids containing resistance genes.