- alkenone
-
b) Any long-chain di-, tri- and tetra- unsaturated methyl and ethyl ketones that are synthesized by a limited number of haptophyte microalgae; the degree of unsaturation is a function of the water temperature.
Wikipedia foundation.
alkenone
Look at other dictionaries:
Alkenone — Alkenones are highly resistant organic compounds (ketones) produced by phytoplankton of the class Prymnesiophyceae.The exact function of the alkenones remains under debate.Coccolithophoroids, for instance Emiliania huxleyi , respond to changes in … Wikipedia
Emiliania huxleyi — Taxobox name = Emiliania huxleyi image width = 250px image caption = Emiliania huxleyi domain = Eukaryota regnum = Chromalveolata phylum = Haptophyta classis = Prymnesiophyceae ordo = Isochrysidales familia = Noelaerhabdaceae genus = Emiliania… … Wikipedia
Geologic temperature record — The Geologic temperature record are changes in Earth s environment as determined from geologic evidence on multi million to billion (109) year time scales.Evidence for past temperaturesOur evidence for past temperatures comes mainly from isotopic … Wikipedia
Heinrich event — Heinrich events, first described by marine geologist Hartmut Heinrich, occurred during the last glacial period, or ice age . During such events, armadas of icebergs broke off from glaciers and traversed the North Atlantic. The icebergs contained… … Wikipedia
Table of Historic and Prehistoric Climate Indicators — Notes on Usage= * This table is a reference tool for rapidly locating Wikipedia articles on Historic and Prehistoric climate indicators of all types.To Add: * Alkenone analysis * TEX 86 analysis * Nile river flood levels * Trace mineral ratios in … Wikipedia
Biomarker — für die Medizin oder Biologie sind messbare Produkte von Organismen, die als Indikatoren z. B. für Umweltbelastungen oder Krankheiten herangezogen werden. In der Geologie versteht man unter Biomarkern organische Substanzen, die in Sedimenten … Deutsch Wikipedia
Ketone — Allgemeine Struktur der Ketone [R1 und R2 sind organische Reste (Alkyl, Aryl o. ä.)]. Die Carbonylgruppe ist blau markiert. Ketone sind chemische Verbindungen, die als funktionelle Gruppe eine nicht endständige Carbonylgruppe (>C=O)… … Deutsch Wikipedia
Emiliania huxleyi — Coccolithophoridés … Wikipédia en Français
Período Cuaternario — Para otros usos de este término, véase cuaternario (desambiguación). Era[1] Período Época Millones años Cenozoico Cuaternario Holoceno 0,011784 … Wikipedia Español
Paleotermómetro — Saltar a navegación, búsqueda Un paleotermómetro es un artilugio metodológico para determinar Tº del pasado usando proxy (símil), encontrados en registros naturales tales como sedimentos o muestras de hielo, o anillos de árboles… … Wikipedia Español
