The introduction of 13 C-labelled substrates to soils, sediments or cultures followed by 13 C
analysis of phospholipid fatty acids (PLFAs) provides quantitative and chemotaxonomic …

… The observed pattern of syringols and guayacols confirms the presence of an open, treeless
landscape as concluded from the identification of the microfossils and macroremains. Other …

One of the defining characteristics of a biomarker is the retention, during diagenesis, of
structural characteristics indicative of its original biogenic source (Peters and Moldowan, 1993). …

… Compound identification was based on mass spectral data and retention time comparisons
… Compound identification was based on mass spectral data and retention time comparisons …

… Base hydrolysis of Holcus lanatus root material has been shown to yield C 22 and C 24 ω-hydroxy
acids (Bull, Nott, van Bergen and Evershed, unpublished results), the obvious …

Well-drained non-agricultural soils mediate the oxidation of methane directly from the
atmosphere, contributing 5 to 10% towards the global methane sink 1 , 2 . Studies of methane …

… of sources may complicate source identification, especially from non-exhaust sources. …
using source apportionment techniques enables the identification of the particle sources. By …

Today, insular Southeast Asia is important for both its remarkably rich biodiversity and
globally significant roles in atmospheric and oceanic circulation. Despite the fundamental …

… Compound identification was based on mass spectral data and retention time comparisons
… Compound identification was based on mass spectral data and retention time comparisons …

… of 5P-stanols derived from farm-yard manure (FYM; Bull et QI. Soil samples from arable plots
… BULL, ID 1997. New molecular methods for detecting natural and anthropogenic inputs to …