Quaternary (disambiguation)
Encyclopedia
Quaternary may refer to:
- QuaternaryQuaternaryThe Quaternary Period is the most recent of the three periods of the Cenozoic Era in the geologic time scale of the ICS. It follows the Neogene Period, spanning 2.588 ± 0.005 million years ago to the present...
(or quartary), the fourth geologic time period - Quaternary numeral systemQuaternary numeral systemQuaternary is the base- numeral system. It uses the digits 0, 1, 2 and 3 to represent any real number.It shares with all fixed-radix numeral systems many properties, such as the ability to represent any real number with a canonical representation and the characteristics of the representations of...
(base-4) in mathematics- Quaternary counting system in linguistics
- Quaternary (EP)Quaternary (EP)Quaternary is an EP by the heavy metal band Mötley Crüe, released in 1994. The EP, which was initially going to be titled Leftovers, was made available as a mail-in offer for purchasers of the self-titled album Mötley Crüe in a limited quantity of 20,000 copies...
, an extended play recording by Mötley Crüe - Quaternary structureQuaternary structureIn biochemistry, quaternary structure is the arrangement of multiple folded protein or coiling protein molecules in a multi-subunit complex.-Description and examples:...
in structural biology - Quaternary compoundQuaternary compoundIn chemistry, a quaternary compound is a cation consisting of a central positively charged nitrogen group atom with four substituents, especially organic groups, discounting hydrogen atoms....
, in which an atom is attached to four other atoms, usually carbon- Quaternary ammonium cationQuaternary ammonium cationQuaternary ammonium cations, also known as quats, are positively charged polyatomic ions of the structure NR4+, R being an alkyl group or an aryl group. Unlike the ammonium ion and the primary, secondary, or tertiary ammonium cations, the quaternary ammonium cations are permanently charged,...
- Quaternary ammonium cation
- Quaternary sector of the economy, which encompasses knowledge-based services