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...

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

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

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

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

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

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

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...

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

Period 23.04 million years ago (Mya) to the beginning of the present Quaternary Period 2.58 million years ago. It is the second period of the Cenozoic...

The American Quaternary Association (AMQUA) is a professional organization of North American scientists devoted to studies of the quaternary geological...

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...

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

mid-late Holocene, such as those on Madagascar and New Zealand, as the Late Quaternary extinction event. The Late Pleistocene saw the extinction of many mammals...

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

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...

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

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

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

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

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...

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...

are no glaciers on the planet. Earth is currently in the ice age called Quaternary glaciation. Individual pulses of cold climate within an ice age are termed...

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,...

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

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...

Quaternary Geochronology is a peer-reviewed scientific journal addressing methods and results in the dating of samples from the Quaternary Period. The...

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

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...

Late Quaternary prehistoric birds are avian taxa that became extinct during the Late Quaternary – the Late Pleistocene or Early Holocene – and before recorded...