Results 101 to 110 of about 3,900 (194)

New Insights Into the Polar Lipid Composition of Extremely Halo(alkali)philic Euryarchaea From Hypersaline Lakes

Frontiers in Microbiology, 2019
We analyzed the polar membrane lipids of 13 strains of halo(alkali)philic euryarchaea from hypersaline lakes. Nine belong to the class Halobacteria, representing two functional groups: aerobic polysaccharide utilizers and sulfur-respiring anaerobes.
Nicole J. Bale, Dimitry Y. Sorokin, Dimitry Y. Sorokin, Ellen C. Hopmans, Michel Koenen, W. Irene C. Rijpstra, Laura Villanueva, Hans Wienk, Jaap S. Sinninghe Damsté, Jaap S. Sinninghe Damsté   +9 more
doaj   +1 more source

Microbial lipid signatures and substrate potential of organic matter in permafrost deposits - implications for future greenhouse gas production [PDF]

, 2016
A terrestrial permafrost core from Buor Khaya in northern Siberia comprising deposits of Late Pleistocene to Early Holocene age has been investigated to characterize living and past microbial communities with respect to modern and paleoclimate ...
Horsfield, Brian, Mangelsdorf, Kai, Overduin, Paul, Schirrmeister, Lutz, Stapel, Janina, Strauss, Jens, Wetterich, Sebastian   +6 more
core   +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

Nitrogen isotope evidence for expanded ocean suboxia in the early Cenozoic [PDF]

, 2019
The million-year variability of the marine nitrogen cycle is poorly understood. Before 57 million years (Ma) ago, the ^(15)N/^(14)N ratio (δ^(15)N) of foraminifera shell-bound organic matter from three sediment cores was high, indicating expanded water ...
Auderset, Alexandra, Haug, Gerald H., Higgins, John A., Kast, Emma R., Martínez-García, Alfredo, Ren, Haojia, Sigman, Daniel M., Stolper, Daniel A., Wang, Xingchen T.   +8 more
core   +1 more source

Carbon isotopic composition of branched tetraether membrane lipids in soils suggest a rapid turnover and a heterotrophic life style of their source organism(s) [PDF]

Biogeosciences, 2010
Branched Glycerol Dialkyl Glycerol Tetraethers (GDGTs) are membrane spanning lipids synthesised by as yet unknown bacteria that thrive in soils and peat.
J. W. H. Weijers, G. L. B. Wiesenberg, R. Bol, E. C. Hopmans, R. D. Pancost   +4 more
doaj   +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

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

Crenarchaeol

Journal of Lipid Research, 2002
The basic structure and stereochemistry of the characteristic glycerol dibiphytanyl glycerol tetraether (GDGT) membrane lipid of cosmopolitan pelagic crenarchaeota has been identified by high field two-dimensional (2D)-NMR techniques.
Jaap S.Sinninghe Damsté, Stefan Schouten, Ellen C. Hopmans, Adri C.T. van Duin, Jan A.J. Geenevasen   +4 more
doaj   +1 more source

Mid-late Holocene temperature and precipitation variations in the Guanting Basin, upper reaches of the Yellow River [PDF]

, 2018
The reconstruction of prehistoric temperature and precipitation variations in the upper reaches of the Yellow River is essential for understanding the cultural evolution of the region, but related information is sparse due to the limitations of the ...
Guo, Yongqiang, Hu, Ying, Huang, Chun Chang, Liu, Weiguo, Qiang, Xiaoke, Wang, Huanye, Xu, Xinwen, Zhang, Yuzhu, Zhao, Hui, Zheng, Zixing, Zhou, Qiang   +10 more
core   +1 more source

Microbial Distributions Across Wide‐Ranging Temperature Gradients of Hot Springs in Thailand: A Review of 35 Years of Research on Hot Spring‐Associated Microorganisms

Environmental Microbiology Reports, Volume 18, Issue 1, February 2026.
This review article summarised 35 years of research on microbial distributions (bacteria, archaea and microbial eukaryotes) across wide‐ranging hot spring temperatures in Thailand, including the overall research progression, scopes and methodologies of previous studies.
C. Sriaporn, K. Phinyo, U. Sompong, J. Pekkoh, J. Homnan, S. Komonjinda   +5 more
wiley   +1 more source