Results 61 to 70 of about 655,736 (160)

Sedimentary lycopane/n‐C31 ratio as a proxy for bottom water hypoxia in coastal ocean

open access: yesLimnology and Oceanography Letters, Volume 11, Issue 5, September 2026.
Abstract Bottom‐water hypoxia on continental shelves is intensifying under climate change and eutrophication, yet long‐term records remain scarce. Here we show that the sedimentary lycopane/n‐C31 ratio reliably records bottom‐water oxygenation in the seasonally hypoxic Yangtze River Estuary.
Qingnan Song   +6 more
wiley   +1 more source

Eukaryotic-Like Virus Budding in Archaea

open access: yesmBio, 2016
Similar to many eukaryotic viruses (and unlike bacteriophages), viruses infecting archaea are often encased in lipid-containing envelopes. However, the mechanisms of their morphogenesis and egress remain unexplored.
Emmanuelle R. J. Quemin   +5 more
doaj   +1 more source

Mediterranean Climate‐Change Scenarios Threaten Winter Cover‐Crop Establishment and Soil‐Health Indicators

open access: yesEuropean Journal of Soil Science, Volume 77, Issue 5, September–October 2026.
ABSTRACT Agricultural systems increasingly face challenges posed by climate change, particularly rising temperatures and altered rainfall patterns. This study evaluated how cover crops (CCs) and soil health indicators respond to six plausible climate change scenarios for the Mediterranean region.
Derlis Enciso‐Santacruz   +5 more
wiley   +1 more source

Fractional abundances of tetraether lipids of Hank core

open access: yes, 2018
Fractional abundances of tetraether lipids of Hank ...
Peterse, Francien   +7 more
core   +1 more source

Evaluating Production of Cyclopentyl Tetraethers by Marine Group II Euryarchaeota in the Pearl River Estuary and Coastal South China Sea: Potential Impact on the TEX86 Paleothermometer

open access: yesFrontiers in Microbiology, 2017
TEX86 [TetraEther indeX of glycerol dialkyl glycerol tetraethers (GDGTs) with 86 carbon atoms] has been widely applied to reconstruct (paleo-) sea surface temperature.
Jin-Xiang Wang   +6 more
doaj   +1 more source

Subsurface Production of Marine Derived Bacterial Tetraether Lipids: Implications for Paleoceanographic Reconstruction

open access: yesGeophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are widely used as paleoclimate proxies on land, yet their origin in marine environments remains incompletely constrained. Here, we analyze suspended particulate matter collected from five depths at an open‐ocean station in the northern South China Sea and provide depth‐resolved evidence
Jiaming Zhou   +9 more
wiley   +1 more source

Synthesis of Archaeal Bipolar Lipid Analogues:  A Way to Versatile Drug/Gene Delivery Systems

open access: yes, 2016
A synthetic route for the preparation of symmetrical and unsymmetrical archaeal tetraether-like analogues has been described. The syntheses are based upon the elaboration of hemimacrocyclic tetraether lipid cores from versatile building blocks followed ...
Thierry Benvegnu (1757260)   +6 more
core   +1 more source

Archaeal Tetraether Lipids as Tracers for Past Marine Environmental Change

open access: yesPaleoceanography and Paleoclimatology, Volume 41, Issue 7, July 2026.
Abstract Archaea are single‐celled microorganisms that are abundant in marine environments and play a key role in the carbon and nitrogen cycles. Archaea can biosynthesize a wide variety of isoprenoid membrane lipids, including isoprenoid glycerol dibiphytanyl glycerol tetraethers (isoGDGTs).
Felix J. Elling   +39 more
wiley   +1 more source

Beyond PEGylation: Archaeal Lipids for Long‐Circulating Liposomes

open access: yesAdvanced NanoBiomed Research, Volume 6, Issue 6, June 2026.
Archaeal lipid‐based liposomes, particularly those containing caldarchaeol (GDGT), were found to significantly prolong the circulation time of vancomycin in rats, matching the pharmacokinetic properties of PEGylated systems. These findings suggest archaeal lipids as promising non‐PEG excipients for parenteral applications to minimize drug clearance ...
Viktor Sedlmayr   +9 more
wiley   +1 more source

Effects of a Novel Archaeal Tetraether-based Colipid on the In Vivo Gene Transfer Activity of Two Cationic Amphiphiles

open access: yes, 2014
International audienceGene therapy for treating inherited diseases like cystic fibrosis might be achieved using multi-modular non-viral lipid-based systems. To date, most optimizations have concerned cationic lipids rather than colipids.
Mériadec, Cristelle   +29 more
core   +1 more source

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