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 …

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 …

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 …

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 …

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 …

Dec 1, 2025 · The implementation of quaternary treatment processes, namely ozonation and activated carbon adsorption, significantly enhances WWTP micropollutants removal, with …

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 …

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 …

Nov 1, 2024 · We report on the incorporation of quaternary amines into polymerized high internal phase emulsions (polyHIPEs) and demonstrate feasibility for potenti…

Sep 1, 2025 · Creating all-carbon quaternary centers remains a formidable challenge in synthetic organic chemistry, despite their widespread occurrence in natural products, particularly in …