Results 21 to 30 of about 92,659 (149)

Carbon isotopic composition of branched tetraether membrane lipids in soils suggest a rapid turnover and a heterotrophic life style of their source organism(s) [PDF]

open access: yesBiogeosciences, 2010
Branched Glycerol Dialkyl Glycerol Tetraethers (GDGTs) are membrane spanning lipids synthesised by as yet unknown bacteria that thrive in soils and peat.
J. W. H. Weijers   +4 more
doaj   +1 more source

Exploring the Influences of Temperature on “H-Shaped” Glycerol Dialkyl Glycerol Tetraethers in a Stratigraphic Context: Evidence From Two Peat Cores Across the Late Quaternary

open access: yesFrontiers in Earth Science, 2021
Unusual “H-Shaped” branched and isoprenoidal glycerol monoalkyl glycerol tetraethers (GMGTs, or H-GDGTs) have been found in peat, lake, and ocean sediments.
Xiaotong Tang   +6 more
doaj   +1 more source

Enhanced production of highly methylated brGDGTs linked to anaerobic bacteria from sediments of the Mariana Trench

open access: yesFrontiers in Marine Science, 2023
Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are bacterial membrane lipids that are widely used in terrestrial paleoclimatic reconstructions. Recent studies have reported that brGDGTs can also be produced by marine bacteria.
Zhiyu Zeng   +13 more
doaj   +1 more source

Co-variation of crenarchaeol and branched GDGTs in globally-distributed marine and freshwater sedimentary archives [PDF]

open access: yes
Two major types of glycerol dialkyl glycerol tetraethers (GDGTs) are commonly used in paleoecological and paleoclimatological reconstructions: isoprenoidal and branched GDGTs.
Rossi, Sergio   +14 more
core   +5 more sources

A laboratory experiment on the behaviour of soil-derived core and intact polar GDGTs in aquatic environments [PDF]

open access: yesBiogeosciences, 2015
We have performed incubation experiments in order to examine the behaviour of soil-derived branched glycerol dialkyl glycerol tetraether (brGDGT) membrane lipids upon entering an aquatic environment and to evaluate the processes that potentially take ...
F. Peterse, C. M. Moy, T. I. Eglinton
doaj   +1 more source

Separation of Branched and Isoprenoid Glycerol Dialkyl Glycerol Tetraether (GDGT) Isomers in Peat Soils and Marine Sediments Using Reverse Phase Chromatography

open access: yesFrontiers in Marine Science, 2020
Over the last decade, glycerol dialkyl glycerol tetraethers (GDGTs) have become one of the most investigated lipid classes in marine and terrestrial organic geochemical research. GDGTs are microbial membrane core lipids biosynthesized as multiple homolog
Jayne E. Rattray, Rienk H. Smittenberg
doaj   +1 more source

Maastrichtian–Rupelian paleoclimates in the southwest Pacific – a critical re-evaluation of biomarker paleothermometry and dinoflagellate cyst paleoecology at Ocean Drilling Program Site 1172 [PDF]

open access: yesClimate of the Past, 2021
Sea surface temperature (SST) reconstructions based on isoprenoid glycerol dialkyl glycerol tetraether (isoGDGT) distributions from the Eocene southwest (SW) Pacific Ocean are unequivocally warmer than can be reconciled with state-of-the-art fully ...
P. K. Bijl   +7 more
doaj   +1 more source

From soil to sea: sources and transport of organic carbon traced by tetraether lipids in the monsoonal Godavari River, India [PDF]

open access: yesBiogeosciences, 2022
Monsoonal rivers play an important role in the land-to-sea transport of soil-derived organic carbon (OC). However, spatial and temporal variation in the concentration, composition, and fate of this OC in these rivers remains poorly understood.
F. M. S. A. Kirkels   +9 more
doaj   +1 more source

Distribution of tetraether lipids in agricultural soils – differentiation between paddy and upland management [PDF]

open access: yesBiogeosciences, 2016
Rice paddies constitute almost a fifth of global cropland and provide more than half of the world's population with staple food. At the same time, they are a major source of methane and therewith significantly contribute to the current warming of Earth's
C. Mueller-Niggemann   +5 more
doaj   +1 more source

Evaluation of lipid biomarkers as proxies for sea ice and ocean temperatures along the Antarctic continental margin [PDF]

open access: yesClimate of the Past, 2021
The importance of Antarctic sea ice and Southern Ocean warming has come into the focus of polar research during the last couple of decades. Especially around West Antarctica, where warm water masses approach the continent and where sea ice has declined ...
N. Lamping   +14 more
doaj   +1 more source

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