The Quaternary (/kwəˈtɜːrnəri, ˈkwɒtərnɛri/ kwə-TUR-nə-ree, KWOT-ər-nerr-ee) is the current and most recent of the three periods of the Cenozoic Era in...

Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period...

also refer to: Quaternary (chemistry) (see also Quaternary compound and Quaternary phase) Quaternary structure of proteins Quaternary sector of the economy...

The quaternary prevention, concept coined by the Belgian general practitioner Marc Jamoulle, are the actions taken to identify a patient at risk of overmedicalisation...

Pleistocene together form the Quaternary period. The Holocene is an interglacial period within the ongoing glacial cycles of the Quaternary, and is equivalent to...

In organic chemistry, quaternary ammonium cations, also known as quats, are positively-charged polyatomic ions of the structure [NR4]+, where R is an alkyl...

Quaternary /kwəˈtɜːrnəri/ is a numeral system with four as its base. It uses the digits 0, 1, 2, and 3 to represent any real number. Conversion from binary...

A quaternary carbon is a carbon atom bound to four other carbon atoms. For this reason, quaternary carbon atoms are found only in hydrocarbons having at...

Lister AM (January 2021). "Late Quaternary megafaunal extinctions in India: How much do we know?" (PDF). Quaternary Science Reviews. 252: 106740. Bibcode:2021QSRv...

tertiary colors. A quaternary color is a seldom-used descriptor that is the conceptual extension of a tertiary color. Quaternary colors have no special...

The quaternary sector of the economy is based upon the economic activity that is associated with either the intellectual or knowledge-based economy. This...

Quaternary International is a peer-reviewed scientific journal on quaternary science published by Elsevier on behalf of the International Union for Quaternary...

Protein quaternary structure is the fourth (and highest) classification level of protein structure. Protein quaternary structure refers to the structure...

a quaternary compound is a compound consisting of exactly four chemical elements. In another use of the term in organic chemistry, a quaternary compound...

Period 23.03 million years ago (Mya) to the beginning of the present Quaternary Period 2.58 million years ago. The Neogene is sub-divided into two epochs...

Postgraduate education, graduate education, or graduate school consists of academic or professional degrees, certificates, diplomas, or other qualifications...

Cenozoic Ice Age began 34 million years ago, its latest phase being the Quaternary glaciation, in progress since 2.58 million years ago. Within ice ages...

Quaternary Research is a peer-reviewed scientific journal of Quaternary science. The journal was established in 1970, is now published by Cambridge University...

challenge in observing the third-order (or tertiary) and fourth-order (quaternary) rainbows is their location in the direction of the sun (about 40° and...

Quaternary geology is the branch of geology that study developments from 2.58 million years ago to the present. In particular, Quaternary geology study...

In mathematics, a quaternary cubic form is a degree 3 homogeneous polynomial in four variables. The zeros form a cubic surface in 3-dimensional projective...

Quaternary science is the subfield of geology which studies the Quaternary Period commonly known as the ice age. The Quaternary Period is a time period...

In materials chemistry, a quaternary phase is a chemical compound containing four elements. Some compounds can be molecular or ionic, examples being...

copper quaternary, usually abbreviated ACQ, is a type of water-based wood preservative product containing a soluble copper(II) complex and quaternary ammonium...

Nucleic acid quaternary structure refers to the interactions between separate nucleic acid molecules, or between nucleic acid molecules and proteins. The...

Two-binary, one-quaternary (2B1Q) is a line code used in the U interface of the Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) and...

palliative, and other complex medical and surgical interventions. The term quaternary care is sometimes used as an extension of tertiary care in reference to...

periods known as the Quaternary glaciation which started around 2,588,000 years ago and is ongoing. The glaciation and the current Quaternary Period both began...

Quaternary is an EP by the heavy metal band Mötley Crüe. It was released in 1994 on Elektra. The EP, which was initially going to be titled Leftovers,...

enzymology, a quaternary-amine-transporting ATPase (EC 3.6.3.32) is an enzyme that catalyzes the chemical reaction ATP + H2O + quaternary amineout ⇌ {\displaystyle...