Results 61 to 70 of about 5,158 (166)

Lipid Biomarkers From Microbial Mats on the McMurdo Ice Shelf, Antarctica: Signatures for Life in the Cryosphere

Frontiers in Microbiology, 2022
Persistent cold temperatures, a paucity of nutrients, freeze-thaw cycles, and the strongly seasonal light regime make Antarctica one of Earth’s least hospitable surface environments for complex life.
Thomas W. Evans, Maria J. Kalambokidis, Anne D. Jungblut, Jasmin L. Millar, Thorsten Bauersachs, Hendrik Grotheer, Tyler J. Mackey, Ian Hawes, Roger E. Summons   +8 more
doaj   +1 more source

A Comprehensive Review of the Key Factors Affecting Biogas Production From Anaerobic Digestion of Organic Waste

CleanMat, Volume 3, Issue 2, Page 74-98, June 2026.
Efficient conversion of organic waste to biogas depends on the coordinated optimization of feedstock composition, pretreatment, operational parameters, reactor design, and microbial community dynamics. This review highlights how these interacting factors improve methane yield and process stability, advancing anaerobic digestion as a practical pathway ...
Ahmed Alengebawy, Yi Ran, Sara Taha Abdelkhalek, Tarek Mahrous, Ahmed Ragheb, Mohamed Samer, Ping Ai   +6 more
wiley   +1 more source

Archaeal lipid mucosal vaccine adjuvant and delivery system

Expert Review of Vaccines, 2010
Archaeal polar lipids are being evaluated as adjuvants/vaccine delivery systems for mucosal vaccines that can provide protection against pathogens that enter the human host via the mucosal surfaces. Archaeosomes, liposomes made from polar lipids extracted from Archaea, with encapsulated antigens elicit strong antigen-specific systemic immune responses ...
Patel, Girishchandra B., Chen, Wangxue
openaire   +2 more sources

Functional Metagenomics Insights Into the Allium ampeloprasum Rhizosphere Microbiome Under Different Fertilization Regimes

MicrobiologyOpen, Volume 15, Issue 3, June 2026.
Shotgun metagenomic sequencing was used to characterize the functional potential of the Allium ampeloprasum rhizosphere microbiome under chemical fertilizer (G1), biofertilizer (G2), and unfertilized (Bulk) soil (G3) management practices. This study revealed that different fertilization regimes altered microbial functional profiles.
Oluwaseun Emmanuel Shittu, Ben Jesuorsemwen Enagbonma, Olubukola Oluranti Babalola   +2 more
wiley   +1 more source

Total Synthesis of Archaeal 36-Membered Macrocyclic Diether Lipid [PDF]

The Journal of Organic Chemistry, 1997
Total synthesis of archaeal 36-membered macrocyclic diether lipid 2 is reported. The synthesis is based upon stereoselective preparation of functionalized isoprenoid chains, ether-linkage formation between the isoprenoid chains with a glycerol derivative, and the ultimate intramolecular dicarbonyl coupling using low-valent titanium known as McMurry ...
Tadashi EGUCHI, Kenji ARAKAWA, Takumi TERACHI, Katsumi KAKINUMA   +3 more
openaire   +2 more sources

Dynamic disorder is crucial for mitochondrial protein import

Protein Science, Volume 35, Issue 6, June 2026.
Abstract The import of proteins into mitochondria poses fundamental mechanistic challenges: aggregation‐prone precursor proteins must be maintained in aqueous compartments and threaded through narrow pores without becoming stuck or mislocalized. Recent evidence from mitochondrial protein import studies and other chaperone systems underscores the ...
Jakob Schneider, Undina Guillerm, Caroline Simões Pereira, Paul Schanda   +3 more
wiley   +1 more source

Optimizing Archaeal Lipid Biosynthesis in Escherichia coli

ACS Synthetic Biology
Membrane lipid chemistry is remarkably different in archaea compared with bacteria and eukaryotes. In the evolutionary context, this is also termed the lipid divide and is reflected by distinct biosynthetic pathways. Contemporary organisms have almost without exception only one type of membrane lipid.
Mirthe Hoekzema, Jiayi Jiang, Arnold J. M. Driessen   +2 more
openaire   +3 more sources

Identification and significance of unsaturated archaeal tetraether lipids in marine sediments [PDF]

Rapid Communications in Mass Spectrometry, 2014
RATIONALE Studies of archaeal glycerol dibiphytanyl glycerol tetraethers (GDGTs) in the environment and cultures have exclusively focused on compounds with fully saturated alkyl moieties. Here we report a number of novel unsaturated GDGTs (uns‐GDGTs) whose alkyl chains contain up to six double bonds and zero to ...
Chun Zhu, Marcos Y. Yoshinaga, Carl A. Peters, Xiao-Lei Liu, Marcus Elvert, Kai-Uwe Hinrichs   +5 more
openaire   +2 more sources

Deglacial Permafrost Organic Carbon Delivery at the Northern Svalbard Continental Margin: Insights From Tetraether Lipids and Plant Biomarkers

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 6, June 2026.
Abstract Degradation of Arctic permafrost due to global warming and sea level rise could trigger positive feedbacks, exacerbating climate change. However, uncertainties remain on how permafrost systems may respond because we lack a complete understanding of the permafrost‐climate feedback.
Mathia Sabino, Alessio Nogarotto, Riko Noormets, Teena Chauhan, Gesine Mollenhauer, Jens Hefter, Tommaso Tesi   +6 more
wiley   +1 more source

Temperature-dependent spatial and temporal trends in archaeal lipid distributions

Communications Earth & Environment
Isoprenoid glycerol dialkyl glycerol tetraethers are key archaeal lipids widely applied in biogeochemistry. Compounds with zero cyclopentane rings and those with four cyclopentane and one cyclohexane ring dominate in marine sediments and are crucial for ...
Siqi Zhao, Rui Bao, Long Zhou, Mingzhi Liu, Xiang Sun, Zhen Gao, Yang Zhou, Nan Wang, Yipeng Wang, Junhui Chen, Lei Xing, Chuanlun Zhang   +11 more
doaj   +1 more source