Results 21 to 30 of about 1,711 (160)

The Sources of Organic Carbon in the Deepest Ocean: Implication From Bacterial Membrane Lipids in the Mariana Trench Zone

Frontiers in Earth Science, 2021
Hadal trenches have higher microbial carbon turnover rates as compared to adjacent abyssal plains. However, the source of organic carbon in the trench remains enigmatic. In this study, we show that a fraction of organic carbon is possibly derived in situ
Jiwei Li, Jiwei Li, Zhiyan Chen, Zhiyan Chen, Zhiyan Chen, Xinxin Li, Xinxin Li, Shun Chen, Hengchao Xu, Kaiwen Ta, Shamik Dasgupta, Shijie Bai, Mengran Du, Shuangquan Liu, Xiaotong Peng   +14 more
doaj   +1 more source

Millennial-age glycerol dialkyl glycerol tetraethers (GDGTs) in forested mineral soils: ¹⁴C-based evidence for stabilization of microbial necromass [PDF]

Biogeosciences, 2021
Understanding controls on the persistence of soil organic matter (SOM) is essential to constrain its role in the carbon cycle and inform climate–carbon cycle model predictions.
H. Gies, F. Hagedorn, M. Lupker, D. Montluçon, N. Haghipour, N. Haghipour, T. S. van der Voort, T. I. Eglinton   +7 more
doaj   +1 more source

Clumped Isotope Temperature Reconstruction Using Stalagmite Drip Cups. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Application of clumped isotope palaeothermometry to speleothems (carbonate cave deposits, e.g., stalagmites and flowstones) has been restricted largely to subaqueous samples because of kinetic fractionation processes that occur during subaerial speleothem formation, which lead to erroneously high inferred temperatures.
Umbo S, Box M, Intveld A, Longman J, Modestou S, Carolin SA, James DH, Martínez-García A, Lope CP, Brenner M, Hodell D, Breitenbach SFM.   +11 more
europepmc   +2 more sources

Marine Group II Euryarchaeota Contribute to the Archaeal Lipid Pool in Northwestern Pacific Ocean Surface Waters

Frontiers in Microbiology, 2020
Planktonic archaea include predominantly Marine Group I Thaumarchaeota (MG I) and Marine Group II Euryarchaeota (MG II), which play important roles in the oceanic carbon cycle. MG I produce specific lipids called isoprenoid glycerol dibiphytanyl glycerol
Cenling Ma, Sarah Coffinet, Julius S. Lipp, Kai-Uwe Hinrichs, Chuanlun Zhang, Chuanlun Zhang   +5 more
doaj   +1 more source

A laboratory experiment on the behaviour of soil-derived core and intact polar GDGTs in aquatic environments [PDF]

Biogeosciences, 2015
We have performed incubation experiments in order to examine the behaviour of soil-derived branched glycerol dialkyl glycerol tetraether (brGDGT) membrane lipids upon entering an aquatic environment and to evaluate the processes that potentially take ...
F. Peterse, C. M. Moy, T. I. Eglinton
doaj   +1 more source

Impacts of temperature and pH on the distribution of archaeal lipids in Yunnan hot springs, China

Frontiers in Microbiology, 2013
In culture experiments and many low temperature environments, the distribution of isoprenoid glycerol dialkyl glycerol tetraethers (GDGTs) commonly shows a strong correlation with temperature; however, this is often not the case in hot springs.
Weiyan eWu, Chuanlun eZhang, Chuanlun eZhang, Huanye eWang, Huanye eWang, Liu eHe, Wenjun eLi, Hailiang eDong, Hailiang eDong   +8 more
doaj   +1 more source

Separation of Branched and Isoprenoid Glycerol Dialkyl Glycerol Tetraether (GDGT) Isomers in Peat Soils and Marine Sediments Using Reverse Phase Chromatography

Frontiers in Marine Science, 2020
Over the last decade, glycerol dialkyl glycerol tetraethers (GDGTs) have become one of the most investigated lipid classes in marine and terrestrial organic geochemical research. GDGTs are microbial membrane core lipids biosynthesized as multiple homolog
Jayne E. Rattray, Rienk H. Smittenberg
doaj   +1 more source

Influence of Growth Phase, pH, and Temperature on the Abundance and Composition of Tetraether Lipids in the Thermoacidophile Picrophilus torridus

Frontiers in Microbiology, 2016
The abundance and composition of glycerol dibiphytanyl glycerol tetraether (GDGT) and glycerol tribiphytanyl glycerol tetraether (GTGT) lipids were determined as a function of growth phase as a proxy for nutrient availability, the pH of growth medium ...
Jayme Feyhl-Buska, Yufei Chen, Chengling Jia, Jinxiang Wang, Chuanlun Zhang, Eric Boyd   +5 more
doaj   +1 more source

Lack of ¹³C-label incorporation suggests low turnover rates of thaumarchaeal intact polar tetraether lipids in sediments from the Iceland shelf [PDF]

Biogeosciences, 2014
Thaumarchaeota are amongst the most abundant microorganisms in aquatic environments, however, their metabolism in marine sediments is still debated. Labeling studies in marine sediments have previously been undertaken, but focused on complex organic ...
S. K. Lengger, Y. A. Lipsewers, H. de Haas, J. S. Sinninghe Damsté, S. Schouten   +4 more
doaj   +1 more source

OH-GDGTs data in West China lakes.

, 2023
74 OH-GDGTs data in lake surface sediment from West China.
Jie Wu (16301873)
core   +1 more source