Quaternary Period In subject area: Earth and Planetary Sciences The Quaternary Period is defined as the most recent geologic era spanning the last 2.6 million years, divided into the Pleistocene and …

Quaternary International is an international, peer-reviewed journal that embraces all aspects related to Quaternary Science. It is the official journal of the International Union for Quaternary Research …

Quaternary Science Advances (QSA) is an international and fully Open Access journal supporting the rapid publication of peer-reviewed original research articles, short communications and review …

Quaternary Environments and Humans (QEH) is the full Open Access, official journal of the International Union for Quaternary Research (INQUA). The journal aims to publish peer reviewed papers under …

Dec 5, 2022 · Quaternary ammonium agents, a class of organic cationic salts of substituted ammonium compounds [1], exist widely in nature, such as acetylcholine 1, betaine 2, and levocarnitine 3 (Fig. 1). …

Quaternary During the past 2 million years, climatic fluctuations of dry glacial and wet interglacial periods affected the geographic ranges of both temperate and tropical areas. Palynological sequences …

Quaternary Structure A complex composed of multiple protein chains (subunits) is defined as a quaternary structure, also called a multimer, or biological assembly. Many proteins form their …

Sep 1, 2025 · The complexity of generating all-carbon quaternary centers underscores the importance of advancing synthetic methodologies that can reliably produce these intricate molecular structures.

Jun 1, 2022 · The Quaternary Period is the most recent and shortest geological period that started around 2.58 Myr ago and is characterized by significant climate instabilities. The deep-sea sediment …

The onset of the recent ice age dates back much further than the Quaternary. An overall, long-term trend of cooling global climates occurred throughout the Tertiary Period. The opening of the North …