Results 91 to 100 of about 3,900 (194)

Towards quantitative reconstruction of past monsoon precipitation based on tetraether membrane lipids in Chinese loess [PDF]

Climate of the Past
Variations in the oxygen isotope composition (δ18O) of cave speleothems and numerous proxy records from loess–paleosol sequences have revealed past variations in East Asian monsoon (EAM) intensity.
J. Guo, J. Guo, M. Ziegler, L. Fuchs, Y. Sun, F. Peterse   +5 more
doaj   +1 more source

Lack of ¹³C-label incorporation suggests low turnover rates of thaumarchaeal intact polar tetraether lipids in sediments from the Iceland shelf [PDF]

Biogeosciences, 2014
Thaumarchaeota are amongst the most abundant microorganisms in aquatic environments, however, their metabolism in marine sediments is still debated. Labeling studies in marine sediments have previously been undertaken, but focused on complex organic ...
S. K. Lengger, Y. A. Lipsewers, H. de Haas, J. S. Sinninghe Damsté, S. Schouten   +4 more
doaj   +1 more source

Laurdan: Clarifying Photophysics and Advancing the Characterization of Extracellular Vesicles

ChemPhysChem, Volume 27, Issue 5, 13 March 2026.
Biophysical properties of extracellular vesicles (EVs) reflect their composition and membrane organization. We introduce a novel approach using time‐resolved emission spectra (TRES) phasor analysis of the polarity‐sensitive probe Laurdan to characterize membranes with complex compositions.
Petra Riegerová, Mariana Amaro, Peter Kapusta, Antonín Vlček, Martin Smolko, Karel Souček, Vendula Pospíchalová, Martin Hof, Šárka Pokorná   +8 more
wiley   +1 more source

Thermoplasmatales and Methanogens: Potential Association with the Crenarchaeol Production in Chinese Soils [PDF]

, 2017
Crenarchaeol is a unique isoprenoid glycerol dibiphytanyl glycerol tetraether (iGDGT) lipid, which is only identified in cultures of ammonia-oxidizing Thaumarchaeota. However, the taxonomic origins of crenarchaeol have been debated recently. The archaeal
Li, Fuyan, Liu, Weiguo, Wang, Yongli, Zhang, Chuanlun L., Zheng, Fengfeng   +4 more
core   +1 more source

Origins of archaeal tetraether lipids in sediments: Insights from radiocarbon analysis [PDF]

Geochimica et Cosmochimica Acta, 2008
Abstract Understanding the supply and preservation of glycerol dibiphytanyl glycerol tetraethers (GDGTs) in marine sediments helps inform their use in paleoceanography. Compound-specific radiocarbon measurements of sedimentary alkenones from multiple environments have been used to gain insight into processes that affect U 37 K ′
Shah Walter, Sunita, Mollenhauer, Gesine, Ohkouchi, Naohiko, Eglinton, Timothy I., Pearson, Ann   +4 more
openaire   +3 more sources

Ether- and Ester-Bound iso-Diabolic Acid and Other Lipids in Members of Acidobacteria Subdivision 4 [PDF]

, 2014
Recently, iso-diabolic acid (13,16-dimethyl octacosanedioic acid) has been identified as a major membrane-spanning lipid of subdivisions 1 and 3 of the Acidobacteria, a highly diverse phylum within the Bacteria.
Bryant, D.A., Dunfield, P.F., Foesel, B.U., Hopmans, E.C., Houghton, K., Overmann, J., Rijpstra, W.I.C., Sinninghe Damsté, J.S., Stott, M., Tank, M., Wüst, P.K.   +10 more
core   +2 more sources

Pulsed Electric Fields for Emerging Single‐Cell Bioprocessing in Food Applications: Electropermeabilization Mechanisms and Design Principles

Comprehensive Reviews in Food Science and Food Safety, Volume 25, Issue 2, March 2026.
ABSTRACT This review evaluates pulsed electric fields (PEF) as an emerging platform for single‐cell bioprocessing in food applications. Connections are drawn between key mechanisms in electropermeabilization and applications, and a practical PEF process design framework is provided.
Byron Perez, Julia Baumgartner, Daniel Macken, Iris Haberkorn, Alexander Mathys   +4 more
wiley   +1 more source

Freeze-fracture planes of methanogen membranes correlate with the content of tetraether lipids [PDF]

Journal of Bacteriology, 1993
Methanospirillum hungatei GP1 contained 50% of its ether core lipids (polar lipids less head groups) as tetraether lipids, and its plasma membrane failed to fracture along its hydrophobic domain during freeze-etching. The membrane of Methanosaeta ("Methanothrix") concilii did not contain tetraether lipids and easily fractured to reveal typical ...
Beveridge, T. J., Choquet, C. G., Patel, G. B., Sprott, G. D.   +3 more
openaire   +3 more sources

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

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