Quaternary Period - an overview | ScienceDirect Topics
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 Science Reviews | Journal | ScienceDirect.com by Elsevier
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 | Journal - ScienceDirect
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 …
Quaternary International | Journal | ScienceDirect.com by Elsevier
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 …
Antibacterial quaternary ammonium agents: Chemical diversity and ...
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 - an overview | ScienceDirect Topics
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 …
PFAS removal from water using quaternary amine functionalized …
Nov 1, 2024 · We report on the incorporation of quaternary amines into polymerized high internal phase emulsions (polyHIPEs) and demonstrate feasibility for potenti…
Recent synthetic methodology advancements towards all-carbon …
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 polycyclic …
Highly positively charged nanofiltration membrane through bis ...
May 15, 2025 · The quaternary ammonium group provides permanent positive charge, which is an ideal candidate for constructing the high PCD of membrane surface [[33], [34], [35], [36], [37], [38]]. …
Quaternary ammonium compounds of emerging concern: Classification ...
Mar 5, 2023 · Determination of selected quaternary ammonium compounds by liquid chromatography with mass spectrometry. Part I. Application to surface, waste and indirect discharge water samples in …