Results 71 to 80 of about 3,987 (248)

Biosynthesis of archaeal membrane ether lipids

Frontiers in Microbiology, 2014
A vital function of the cell membrane in all living organism is to maintain the membrane permeability barrier and fluidity. The composition of the phospholipid bilayer is distinct in archaea when compared to bacteria and eukarya.
Samta eJain, Samta eJain, Antonella eCaforio, Arnold J. M. Driessen   +3 more
doaj   +1 more source

Clumped Isotope Temperature Reconstruction Using Stalagmite Drip Cups

Rapid Communications in Mass Spectrometry, Volume 40, Issue 8, 30 April 2026.
ABSTRACT Rationale Application of clumped isotope palaeothermometry to speleothems (carbonate cave deposits, e.g., stalagmites and flowstones) has been restricted largely to subaqueous samples because of kinetic fractionation processes that occur during subaerial speleothem formation, which lead to erroneously high inferred temperatures.
Stuart Umbo, Maria Box, Aviva Intveld, Jack Longman, Sevasti Modestou, Stacy A. Carolin, Daniel H. James, Alfredo Martínez‐García, Carlos Peraza Lope, Mark Brenner, David Hodell, Sebastian F. M. Breitenbach   +11 more
wiley   +1 more source

Collapsed bipolar glycolipids at the air/water interface: Effect of the stereochemistry on the stretched/bent conformations.

, 2013
International audienceThis article describes a comparative study of several bipolar lipids derived from tetraether structures. The sole structural difference between the main two glycolipids is a unique stereochemical variation on a cyclopentyl ring ...
Benvegnu, Thierry, Jacquemet, Alicia, Lemiègre, Loïc, Terme, Nolwenn, Vié, Véronique   +4 more
core   +3 more sources

Drastic changes in the distribution of branched tetraether lipids in suspended matter and sediments from the Yenisei River and Kara Sea (Siberia): Implications for the use of brGDGT-based proxies in coastal marine sediment [PDF]

, 2015
The distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in soils has been shown to correlate with pH and mean annual air temperature.
Cherkashov, G., De Jonge, C., Fedotov, A., Hopmans, E.C., Sinninghe Damsté, J.S., Stadnitskaia, A., Streletskaya, I.D., Vasiliev, A.A.   +7 more
core   +1 more source

Voltage clamp studies on S-layer-supported tetraether lipid membranes

Biochimica et Biophysica Acta (BBA) - Biomembranes, 1998
Isolated subunits from the cell surface proteins (S-layer) of Bacillus coagulans E38-66 have been recrystallized on a glycerol dialkyl nonitol tetraether lipid (GDNT)-monolayer and the electrophysical features of this biomimetic membrane have been investigated in comparison to unsupported GDNT-monolayers.
Schuster, Bernhard, Pum, Dietmar, Sleytr, Uwe B.   +2 more
openaire   +2 more sources

Temperature Sensitivity of Leaf Wax n‐Alkane Carbon Isotopes: Mechanisms and Implications for Terrestrial Paleoclimates

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract While climate signals encapsulated in the 13C content of C3 plants' leaf wax n‐alkanes are largely tied to precipitation, they may also be sensitive to plant physiological responses to temperature. In this study, statistical analyses on a global data set of modern plants reveal a correlation between the 13C discrimination for leaf waxes ...
Hao Xie, Max K. Lloyd, Allison A. Baczynski, Aaron F. Diefendorf, Katherine H. Freeman   +4 more
wiley   +1 more source

An offset in TEX86 values between interbedded lithologies: Implications for sea-surface temperature reconstructions [PDF]

, 2016
This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.The TEX86 (TetraEther indeX of tetraethers consisting of 86 carbon atoms) sea-surface temperature (SST) proxy is based on the distribution of ...
Bown, PR, Littler, K, Robinson, SA
core   +1 more source

Occurrence and distribution of glycerol dialkyl glycerol tetraethers in a French peat bog

, 2010
International audienceThe present study was aimed at examining the distribution and abundance of glycerol dialkyl glycerol tetraethers (GDGTs) of archaeal and bacterial origin in peat samples from surface and deep (ca.
Derenne, Sylvie, Fosse, Céline, Huguet, Arnaud, Laggoun-Défarge, Fatima, Toussaint, Marie-Laure   +4 more
core   +4 more sources

Evidence of moisture control on the methylation of branched glycerol dialkyl glycerol tetraethers in semi-arid and arid soils [PDF]

, 2016
The distribution of bacterial branched glycerol dialkyl glycerol tetraethers (brGDGTs) is influenced by growth temperature and pH. This results in the widespread application of the brGDGT-based MBT(‘)/CBT proxy (MBT-methylation of branched tetraethers ...
Dang, Xinyue, Naafs, B. David A., Pancost, Richard D., Xie, Shucheng, Yang, Huan   +4 more
core   +2 more sources

Sea Surface Temperature and Salinity Changes in the Easternmost Mediterranean During the Pre‐Evaporitic Messinian Controlled by the Restriction at Gibraltar

Paleoceanography and Paleoclimatology, Volume 41, Issue 1, January 2026.
Abstract During the latest Miocene, the Mediterranean Basin was affected by extreme paleoceanographic and paleoenvironmental changes culminating with evaporite (gypsum and halite) formation during the Messinian Salinity Crisis (MSC: 5.97–5.33 Ma).
F. Lanterna, W. Krijgsman, L. Lourens, A. Mulch, I. Vasiliev   +4 more
wiley   +1 more source