Search for "Quaternary" in article titles:

1. Quaternary: Quaternary, in geology, the time - division which embraces the Pleistocence and Holocene epochs, i. the later portion of the Cainozoic era, equivalent to the "Post-Pliocene" or "Post-Tertiary" of certain writers. Desnoyers in 1829 to cover those formations which ... [100%] 2022-09-02
2. Quaternary: The Quaternary sub-era (or period) is the historically designated geologic time period extending from the end of the Pliocene epoch roughly 1.8–1.6 million years ago to the present. The Quaternary is one subdivision of the Cenozoic ... [100%] 2023-02-03
3. Quaternary: The Quaternary sub-era (or period) is the historically designated geologic time period extending from the end of the Pliocene epoch roughly 1.8–1.6 million years ago to the present. The Quaternary is one subdivision of the Cenozoic ... [100%] 2023-02-04
4. Quaternary: 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 the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene ... (Earth) [100%] 2023-12-19 [Quaternary] [Geological periods]...
5. Quaternary: Quaternary is a term used in organic chemistry to classify various types of compounds (e. g. (Chemistry) [100%] 2024-09-22 [Chemical nomenclature]
6. Quaternary glaciation: The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing. Although geologists describe this entire period up ... (Series of alternating glacial and interglacial periods) [70%] 2023-05-10 [Ice ages] [Pleistocene]...
7. Quaternary science: Quaternary science is the study which represents the systematic study of the Quaternary Period commonly known as the ice age. The Quaternary Period is a time period that started around 2.58 million years ago and continues today. (Earth) [70%] 2023-10-25 [Quaternary]
8. Quaternary carbon: 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 least five carbon atoms. (Chemistry) [70%] 2023-12-18 [Chemical nomenclature] [Organic chemistry]...
9. Quaternary extinction: The Quaternary period (from 2.588 ± 0.005 million years ago to the present) has seen the extinctions of numerous predominantly megafaunal species, which have resulted in a collapse in faunal density and diversity and the extinction of key ecological ... (Earth) [70%] 2022-09-20 [Pleistocene]
10. Open Quaternary: Open Quaternary is a peer-reviewed open access scientific journal publishing contributions that consider the changing environment of the Quaternary as well as the development of humanity. It published with Ubiquity Press. [70%] 2022-10-29 [Open access journals] [Quaternary science journals]...
11. Quaternary prevention: The quaternary prevention, concept coined by the Belgian general practitioner Marc Jamoulle, are the actions taken to identify a patient at risk of overmedicalisation, to protect them from new medical invasion, and to suggest interventions which are ethically acceptable. Quaternary ... (Medicine) [70%] 2022-08-17 [Evidence-based medicine] [Health care quality]...
12. Quaternary extinction: The Quaternary period (from 2.588 ± 0.005 million years ago to the present) has seen the extinctions of numerous predominantly megafaunal species, which have resulted in a collapse in faunal density and diversity and the extinction of key ecological ... (mass extinction, occurring around 10,000 BCE, marking the end of the Pleistocene and the beginning of the Holocene) [70%] 2021-12-23 [Extinction events] [Pleistocene]...
13. Quaternary science: 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 that started around 2.58 million years ago and continues today. (Inter-disciplinary field of study focusing on the Quaternary period) [70%] 2023-09-22 [Quaternary] [Subfields of geology]...
14. Quaternary carbon: 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 least five carbon atoms. [70%] 2023-01-30 [Chemical nomenclature] [Organic chemistry]...
15. Quaternary glaciation: The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing. Although geologists describe this entire period up ... (Earth) [70%] 2023-09-30 [Pleistocene] [Pleistocene events]...
16. Quaternary geology: 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 process and deposits that developed during the Quaternary, a period characterized by glacial-interglacial cycles. (Branch of geology that studies developments more recent than 2.58 million years ago) [70%] 2023-10-07 [Quaternary geology]
17. Quaternary phase: In materials chemistry, a quaternary phase is a chemical compound containing four elements. Some compounds can be molecular or ionic, examples being chlorodifluoromethane (CHClF2) sodium bicarbonate (NaCO3H). (Chemical compound made of four elements) [70%] 2023-05-22 [Chemical compounds]
18. Quaternary geology: 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 process and deposits that developed during the Quaternary, a period characterized by glacial-interglacial cycles. (Earth) [70%] 2024-09-03 [Quaternary geology]
19. Quaternary ammonium cation: In chemistry, quaternary ammonium cations, also known as quats, are positively-charged polyatomic ions of the structure +, R being an alkyl group or an aryl group. Unlike the ammonium ion (NH+4) and the primary, secondary, or tertiary ammonium cations ... (Chemistry) [57%] 2023-06-15 [Quaternary ammonium compounds] [Disinfectants]...
20. Quaternary quadratic form: A quadratic form in four variables. A quaternary quadratic form over a field $ F $ is related to the algebra of quaternions (cf. (Mathematics) [57%] 2023-07-11
21. Quaternary extinction event: The Quaternary period (from 2.588 ± 0.005 million years ago to the present) saw the extinctions of numerous predominantly megafaunal species, which resulted in a collapse in faunal density and diversity and the extinction of key ecological strata across ... (Earth) [57%] 2021-12-22 [Pleistocene] [Climate history]...
22. Quaternary extinction event: Redirect to. [57%] 2021-12-24
23. Quaternary Science Reviews: Quaternary Science Reviews is a peer-reviewed scientific journal covering quaternary science. It was established in 1982 by Pergamon Press and is currently published by Elsevier. [57%] 2022-08-03 [Elsevier academic journals] [Biweekly journals]...
24. Quaternary ammonium cation: Editor-In-Chief: C. Michael Gibson, M.S., M.D. [57%] 2023-03-19 [Quaternary ammonium compounds] [Disinfectants]...
25. American Quaternary Association: The American Quaternary Association (AMQUA) is a professional organization of North American scientists devoted to studies of the quaternary geological period. They were founded in 1970 and their stated goals are to "foster cooperation and communication among the remarkably broad ... (Organization) [57%] 2024-05-28 [Geology organizations] [Academic publishing companies]...
26. American Quaternary Association: American Quaternary Association (AMQUA, буквально Американская Четвертичная Ассоциация) — профессиональная организация североамериканских учёных, занимающаяся изучением четвертичного геологического периода. Она была основана в 1970 году, и заявленные цели организации состоят в том, чтобы «способствовать сотрудничеству и общению между чрезвычайно шир. [57%] 2024-06-08
27. List of Quaternary volcanic eruptions: This article is a list of volcanic eruptions of approximately magnitude 6 or more on the Volcanic Explosivity Index (VEI) or equivalent sulfur dioxide emission during the Holocene, and Pleistocene eruptions of the Decade Volcanoes (Avachinsky–Koryaksky, Kamchatka; Colima, Trans ... (None) [44%] 2023-12-03 [Lists of volcanic eruptions] [Volcanic events by period]...
28. Quaternary sector of the economy: The quaternary sector of the economy is based upon the economic activity that is associated with either the intellectual or knowledge-based economy. This consists of information technology; media; research and development; information-based services such as information-generation and ... (Sector of an economy based on knowledge and skill) [44%] 2023-12-14 [Economic sectors] [National accounts]...
29. International Union for Quaternary Research: The International Union for Quaternary Research (INQUA) was founded in 1928. It has members from a number of scientific disciplines who study the environmental changes that occurred during the glacial ages, the last 2.6 million years. (Organization) [44%] 2023-08-29 [Geology organizations] [Quaternary]...
30. Quaternary sector of the economy: The quaternary sector of the economy is based upon the economic activity that is associated with either the intellectual or knowledge-based economy. This consists of information technology; media; research and development; information-based services such as information-generation and ... (Finance) [44%] 2024-05-09 [Economic sectors] [National accounts]...
31. Silicone quaternary amine: Silicone quaternary amine is a chemical antimicrobial agent used in some odor-repellent socks, including Burlington Bioguard Socks. (Chemistry) [57%] 2023-08-26 [Polymers]
32. Protein quaternary structure: Protein quaternary structure is the fourth (and highest) classification level of protein structure. Protein quaternary structure refers to the structure of proteins which are themselves composed of two or more smaller protein chains (also referred to as subunits). (Biology) [57%] 2023-12-21 [Protein structure] [Stereochemistry]...
33. Quaternary-amine-transporting ATPase: In enzymology, a quaternary-amine-transporting ATPase (EC 3.6.3.32) is an enzyme that catalyzes the chemical reaction The 3 substrates of this enzyme are ATP, H2O, and quaternary amine, whereas its 3 products are ADP, phosphate, and ... (Biology) [50%] 2023-05-25 [EC 3.6.3] [Enzymes of unknown structure]...