Results 71 to 80 of about 1,695 (156)

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

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

Grain Size Associations of Branched Tetraether Lipids in Soils and Riverbank Sediments: Influence of Hydrodynamic Sorting Processes

Frontiers in Earth Science, 2017
We analyzed the abundance and distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in grain size fractions of 7 globally distributed river flank sediments and catchment soils in order to determine if and how the initial soil-brGDGT ...
Francien Peterse, Francien Peterse, Timothy I. Eglinton   +2 more
doaj   +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

Planktonic Lipidome Responses to Aeolian Dust Input in Low-Biomass Oligotrophic Marine Mesocosms

Frontiers in Marine Science, 2017
The effect and fate of dry atmospheric deposition on nutrient-starved plankton in the Eastern Mediterranean Sea (EMS; Crete, 2012) was tested by spiking oligotrophic surface seawater mesocosms (3 m3) with Saharan dust (SD; 1.6 g L−1; 23 nmol NOx mg−1; 2 ...
Travis B. Meador, Nadine I. Goldenstein, Alexandra Gogou, Barak Herut, Stella Psarra, Tatiana M. Tsagaraki, Kai-Uwe Hinrichs   +6 more
doaj   +1 more source

A Late Miocene Terrestrial Temperature History for the Northeastern Tibetan Plateau's Period of Tectonic Expansion

Geophysical Research Letters, 2019
During the Late Miocene, the climate patterns and ecosystems of continental land masses experienced crucial transitions, but whether the principal driver was regional tectonic forcing or a decline in CO2 concentrations remains debated.
Chihao Chen, Yan Bai, Xiaomin Fang, Haichao Guo, Qingquan Meng, Weilin Zhang, Pengchao Zhou, Azamdzhon Murodov   +7 more
doaj   +1 more source

Quantitative conversion of diether or tetraether phospholipids to glycerophosphoesters by dealkylation with boron trichloride: a tool for structural analysis of archaebacterial lipids.

Journal of Lipid Research, 1988
A method for preparing glycerophosphoesters from ether phospholipids by dealkylation with boron trichloride (BCl3) is described. Treatment of ether phospholipids in chloroform with BCl3 for 30 min at room temperature yielded almost quantitatively the ...
M Nishihara, Y Koga
doaj   +1 more source

Certain, but Not All, Tetraether Lipids from the Thermoacidophilic Archaeon Sulfolobus acidocaldarius Can Form Black Lipid Membranes with Remarkable Stability and Exhibiting Mthk Channel Activity with Unusually High Ca²⁺ Sensitivity. [PDF]

Int J Mol Sci, 2021
Bonanno A, Chong PL.
europepmc   +1 more source

Archaeal community composition in Holocene methane pockmarks of the Gdańsk Basin (Baltic Sea, Poland): insights from tetraether lipids and 16S rRNA analysis [PDF]

Biogeosciences
Methane pockmarks and shallow gas systems are prominent geomorphological features in the Baltic Sea that act as hotspots of microbial activity. In the Gdańsk Basin, pockmarks vary in gas-seepage intensity and in the extent of freshened porewater ...
I. De Mey-Śnieżyńska, M. Słowakiewicz, F. Peterse, A. Brodecka-Goluch, A. Borkowski, K. Łukawska-Matuszewska   +5 more
doaj   +1 more source

Making drugs safer: improving drug delivery and reducing the side effect of drugs on the human biochemical system

Nanotechnology Reviews, 2016
Restrategizing becomes inevitable when in trying to proffer solution to a problem, damage in a different form is done. The unintended effects of drugs (side effects) could be leaving behind more damage than the therapeutic effect they are required to ...
Odiba Arome, Ukegbu Chimere, Anunobi Oluchukwu, Chukwunonyelum Ike, Esemonu Juliet   +4 more
doaj   +1 more source