Results 61 to 70 of about 1,876 (158)

Eukaryotic-Like Virus Budding in Archaea

mBio, 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, Petr Chlanda, Martin Sachse, Patrick Forterre, David Prangishvili, Mart Krupovic   +5 more
doaj   +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

Frontiers 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, Jin-Xiang Wang, Wei Xie, Yi Ge Zhang, Travis B. Meador, Chuanlun L. Zhang, Chuanlun L. Zhang   +6 more
doaj   +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

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

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

Biomarker evidence of a serpentinite chemosynthetic biosphere at the Mariana forearc

Communications Earth & Environment
Present-day serpentinization systems, such as that at the Mariana forearc, are prominent sources of reduced volatiles, including molecular hydrogen (H2) and methane (CH4), and are considered analogs for chemosynthetic ecosystems on early Earth.
Palash Kumawat, Elmar Albers, Wolfgang Bach, Frieder Klein, Walter Menapace, Christoph Vogt, Florence Schubotz   +6 more
doaj   +1 more source

Seasonal Changes in Marine Archaeal Tetraether Lipid Export Depth Linked to Net Primary Productivity

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Marine ammonia oxidizing archaea (AOA) produce isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) which form the basis of seawater temperature proxy TEX86. Although most studies use TEX86 for sea surface temperature (SST) reconstructions, maximum GDGT production occurs at and below the nitracline. Moreover, sedimentary GDGT‐2/GDGT‐3
Addison Rice, Eunmi Park, Gesine Mollenhauer, Daisy Bouwmans, Anouk van Boxtel, Gert J. de Lange, Ryan Paul, Francesca Sangiorgi, Ryan Smulders, Jan‐Berend Stuut, Martin Ziegler, Appy Sluijs, Francien Peterse   +12 more
wiley   +1 more source

Evaluating the Reliability of Grain‐Size Sorting for Organic Biomarker Analysis

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Organic and inorganic geochemical proxies are fundamental for interpreting past climate variability. For inorganic analysis, marine sediments are often size fractionated to isolate foraminifera, while organic analysis employs subsamples of bulk sediment.
J. S. Hingley, P. S. Bray, T. Agterhuis, G. L. Foster, B. S. Wade, J. H. Whiteside, G. N. Inglis   +6 more
wiley   +1 more source

Preservation and degradation of ancient organic matter in mid-Miocene Antarctic permafrost [PDF]

Biogeosciences
The Antarctic environment is amongst the coldest and driest environments on Earth. The ultraxerous soils in the McMurdo Dry Valleys support exclusively microbial communities, however, 15 million years ago, a tundra ecosystem analogous to present-day ...
M. Verret, S. Naeher, S. Naeher, D. Lacelle, C. Ginnane, W. Dickinson, K. Norton, J. Turnbull, J. Turnbull, R. Levy, R. Levy   +10 more
doaj   +1 more source

Disentangling influences of climate variability and lake-system evolution on climate proxies derived from isoprenoid and branched glycerol dialkyl glycerol tetraethers (GDGTs): the 250 kyr Lake Chala record [PDF]

Biogeosciences
High-resolution paleoclimate records from tropical continental settings are greatly needed to advance understanding of global climate dynamics. The International Continental Scientific Drilling Program (ICDP) project DeepCHALLA recovered a 214.8 m long ...
A. J. Baxter, F. Peterse, D. Verschuren, A. Maitituerdi, N. Waldmann, J. S. Sinninghe Damsté, J. S. Sinninghe Damsté   +6 more
doaj   +1 more source