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 Holocene epochs, characterized by significant climatic oscillations and the evolution of modern flora and fauna, including Homo sapiens
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 (INQUA) and aims to publish high-quality and impactful articles covering significant advances … View full aims scope
The Quaternary Period - ScienceDirect The Quaternary System Period, comprising the Holocene and Pleistocene series epochs, encompasses the last ~2 6 Myr during which time Earth’s climate was strongly influenced by bipolar glaciation, and the genus Homo first appeared and diversified
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 indicate that at least during the Pleistocene, major climatic changes affected speciation and biogeographic patterns in South America The modern geographical distributions of many endemic taxa
Antibacterial quaternary ammonium agents: Chemical diversity and . . . 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) In the last decades, quaternary ammonium compounds (QACs) have received significant attention due to their broad application in pharmaceutical chemistry [2]
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 the auspices of the leading Quaternary association, with a special focus on recent advances in Quaternary sciences that appeal to a wide audience and that combine approaches from several disciplines
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 papers dealing with all aspects of Quaternary science