Results 11 to 20 of about 2,346 (185)

The influence of near-surface sediment hydrothermalism on the TEX₈₆ tetraether-lipid-based proxy and a new correction for ocean bottom lipid overprinting [PDF]

Biogeosciences, 2022
The diversity and relative abundances of tetraether lipids produced by archaea and bacteria in soils and sediments are increasingly used to assess environmental change.
J. N. Bentley, G. T. Ventura, C. C. Walters, S. M. Sievert, J. S. Seewald   +4 more
doaj   +3 more sources

Archaeosomes and Tetraether Lipid Liposome

Pharmaceutical Sciences and Research, 2012
Archaea have phytanyl ether lipids which is one of the characteristics that separates them from bacteria and eukaryotes. Some archaea have also unique membrane spanning tetrae- ther lipids (T EL); in Sulfolobus and Ihermoplasma species these TELmake up the majority of total membrane lipids.
Freisleben, Hans-Joachim
core   +4 more sources

Planktonic Euryarchaeota are a significant source of archaeal tetraether lipids in the ocean [PDF]

Proceedings of the National Academy of Sciences, 2014
Significance All three domains of life—Eukarya, Bacteria, and Archaea—are known to inhabit the marine water column from surface waters to great depth. Planktonic marine Archaea are comprised of two dominant groups—the Thaumarchaeaota and Euryarchaeota.
Summons, Roger Everett, DeLong, Edward, Lincoln, Sara Ann, Wai, Brenner, Eppley, John Marmaduke, Church, Matthew J.   +5 more
openaire   +4 more sources

Identification of unusual butanetriol dialkyl glycerol tetraether and pentanetriol dialkyl glycerol tetraether lipids in marine sediments [PDF]

Rapid Communications in Mass Spectrometry, 2013
RATIONALE Glycerol serves as the principal backbone moiety bound to various acyl/alkyl chains for membrane lipids of Eukarya , Bacteria , and Archaea .
Chun Zhu, Travis B. Meador, Wolf Dummann, Kai-Uwe Hinrichs   +3 more
openaire   +3 more sources

Laurdan: Clarifying Photophysics and Advancing the Characterization of Extracellular Vesicles. [PDF]

Chemphyschem
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.
Riegerová P, Amaro M, Kapusta P, Vlček A, Smolko M, Souček K, Pospíchalová V, Hof M, Pokorná Š.   +8 more
europepmc   +2 more sources

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   +4 more sources

Environmental Controls on Crenarchaeol Distributions in Hydrothermal Springs [PDF]

Environ Microbiol
The optimal pH and temperature for crenarchaeol (a unique archaeal lipid) production in hydrothermal springs are 7.4°C and 46°C, respectively, which has important implications for archaeal evolution. Our study also indicates that pH is the most important environmental variable for archaeal lipid membrane compositions.
Calhoun A, Blewett J, Colman D, Amenabar M, Harris C, Boyd E, Pearson A, Leavitt W.   +7 more
europepmc   +2 more sources

Lipid hydrogen isotope compositions primarily reflect growth water in the model archaeon Sulfolobus acidocaldarius [PDF]

Applied and Environmental Microbiology
The stable hydrogen isotope composition (δ2H) of lipid biomarkers can track environmental processes and remain stable over geologically relevant time scales, enabling studies of past climate, hydrology, and ecology.
Carolynn M. Harris, Sebastian Kopf, Jeemin H. Rhim, Alec Cobban, Felix J. Elling, Xiahong Feng, Jamie McFarlin, Yuki Weber, Yujiao Zhang, Alice Zhou, Harpreet Batther, Ann Pearson, William D. Leavitt   +12 more
doaj   +2 more sources

A New Era for Using Natural Pigments: The Case of the C₅₀ Carotenoid Called Bacterioruberin. [PDF]

Biotechnol Appl Biochem
ABSTRACT Haloarchaea are extremophilic microorganisms belonging to the Archaea domain that require high salt concentrations to live, thus inhabiting ecosystems like salty ponds, salty marshes, or extremely salty lagoons. They are more abundant and widely distributed worldwide than initially expected.
Giani M, Valdés E, Miralles-Robledillo JM, Martínez G, Pire C, Martínez-Espinosa RM.   +5 more
europepmc   +2 more sources

Preparation and Characterization of Stealth Archaeosomes Based on a Synthetic PEGylated Archaeal Tetraether Lipid. [PDF]

J Drug Deliv, 2011
International audienceThe present studies were focused on the formation and characterization of sterically stabilized archaeosomes made from a synthetic PEGylated archaeal lipid.
Barbeau J, Cammas-Marion S, Auvray P, Benvegnu T.   +3 more
europepmc   +2 more sources