Preservation and degradation of ancient organic matter in mid-Miocene Antarctic permafrost [PDF]
BiogeosciencesThe 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 +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]
BiogeosciencesHigh-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 +6 more
doaj +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 +8 more
core +1 more source
The Headgroup (A)Symmetry Strongly Determines the Aggregation Behavior of Single-Chain Phenylene-Modified Bolalipids and Their Miscibility with Classical Phospholipids [PDF]
, 2014 In the present work, we describe the synthesis of two single-chain phenylene-modified bolalipids, namely PC-C17pPhC17-PC and PC-C17pPhC17-OH, with either symmetrical (phosphocholine) or asymmetrical (phosphocholine and hydroxyl) headgroups using a ...
Alfred Blume +5 more
core +1 more source
Planktonic Euryarchaeota are a significant source of archaeal tetraether lipids in the ocean [PDF]
, 2014 Sara A. Lincoln +5 more
openalex +1 more source
Methane emission and consumption at a North Sea gas seep (Tommeliten area) [PDF]
Biogeosciences, 2005 The Tommeliten seepage area is part of the Greater Ekofisk area, which is situated above the Tommeliten Delta salt diapir in the central North Sea (56°29.90' N, 2°59.80' E, Norwegian Block 1/9, 75 m water depth).
H. Niemann +13 more
doaj
Distribution of tetraether lipids in sulfide chimneys at the Deyin hydrothermal field, southern Mid-Atlantic Ridge: Implication to chimney growing stage [PDF]
, 2018 Huaiming Li +8 more
openalex +1 more source
Grain Size Associations of Branched Tetraether Lipids in Soils and Riverbank Sediments: Influence of Hydrodynamic Sorting Processes [PDF]
, 2017 Francien Peterse, Timothy I. Eglinton
openalex +1 more source
Phase behavior of selected artificial lipids [PDF]
, 2016 The flexibility of biomembranes is based on the physical-chemical properties of their main components - glycerophospholipids. The structure of these modular amphiphilic molecules can be modified through organic synthesis making it possible to study ...
Brezesinski, Gerald +2 more
core