Glycerol dialkyl glycerol tetraether (GDGT) lipids are membrane lipids which were long
thought to be synthesized mainly by archaea, organisms thought to be limited to extreme …

It is well established that greenhouse conditions prevailed during the Cretaceous Period (~
145–66 Ma). Determining the exact nature of the greenhouse-gas forcing, climatic warming …

Molecular organic geochemical proxies are increasingly being utilized to reconstruct past
environmental conditions as new tools continue to be discovered and developed. To date, …

A new route for the formation of gammacerane from tetrahymanol is proposed; in addition to
dehydration and hydrogenation, sulphurisation and early CS cleavage are shown to be …

Modern agriculture has accelerated biological methane and nitrogen cycling on a global
scale 1 , 2 . Freshwater sediments often receive increased downward fluxes of nitrate from …

A method combining normal phase high performance liquid chromatography (HPLC) with
positive ion atmospheric pressure chemical ionization mass spectrometry (APCI‐MS) was …

Marine Crenarchaeota are the most abundant single group of prokaryotes in the ocean, but
their physiology and role in marine biogeochemical cycles are unknown. Recently, a …

It has recently been shown that membrane lipids of marine crenarchaeota, a ubiquitous and
abundant component of plankton, occur in relatively high concentrations in recent and …

The Palaeocene/Eocene thermal maximum, ∼55 million years ago, was a brief period of
widespread, extreme climatic warming 1 , 2 , 3 , that was associated with massive atmospheric …

Anaerobic ammonium oxidation (anammox) is both a promising process in wastewater
treatment and a long overlooked microbial physiology that can contribute significantly to …