This review delves into the investigation of the biological activity and structural diversity of
steroids and related isoprenoid lipids. The study encompasses various natural compounds …

Eukaryotic life appears to have flourished surprisingly late in the history of our planet. This
view is based on the low diversity of diagnostic eukaryotic fossils in marine sediments of mid …

Research into organic matter in speleothems has progressed recently to encompass new
analytical approaches and applications, which offer increased potential in areas such as …

Northeastern Brazil represents a strategic area in terms of Quaternary records of
environmental changes in South America due to its distinct semi-arid climate in near …

Higher plant biomarkers occur in various compound classes with an array of isomers that
are challenging to separate and identify. Traditional one-dimensional (1D) gas …

Aromatic hydrocarbons extracted from Upper Cretaceous (Maastrichtian and Campanian)
Latrobe Group coaly shales and shales from the Gippsland Basin were investigated by gas …

Clay minerals play important roles in stabilizing organic matter (OM) in soils. In order to
investigate the nature of OM in association with clay minerals in peatland soils, the coarse (> …

Aromatic derivatives of vascular plant triterpenoids are common in recent and ancient
sediments, coal, and petroleum. Understanding their early diagenetic alterations and their …

Organic matter preserved in speleothems has considerable potential to record changes in
the surrounding environment, particularly in the overlying vegetation. Here, we review three …

The distributions of aliphatic and aromatic terpenoids in Cretaceous and Paleogene
angiosperm fossils from Japan were investigated. Aliphatic A ring-degraded oleanane …