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Molecular Dynamics Simulations of Pyrophyllite Edge Surfaces: Structure, Surface Energies, and Solvent Accessibility
Atomistic simulations of 2:1 clay minerals based on parameterized forcefields have been applied successfully to provide a detailed description of the...
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Evidence of microbiocoenosis in the formation of laminae in modern stromatolites
The first appearance of laminated stromatolites in sedimentary rocks around 3.5 billion years ago is generally accepted as evidence for the earliest...
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Dissolved organic matter: Fractional composition and sorbability by the soil solid phase (Review of literature)
The behavior of dissolved organic matter (DOM) in soils under varying environmental conditions represents a poorly studied aspect of the problem of...
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7.8 Traces of Life
When and how life on Earth started is still an open question. Biochemical fingerprints stored in the ancient rock record indicate the presence of...
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Isolation and purification of Cu-free methanobactin from Methylosinus trichosporiumOB3b
BackgroundThe isolation of highly pure copper-free methanobactin is a prerequisite for the investigation of the biogeochemical functions of this...
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Paleobiological Applications of Focused Ion Beam Electron Microscopy (FIB-EM): An Ultrastructural Approach to the (Micro)Fossil Record
Coupled dual-beam focused ion beam electron microscopy (FIB-EM) has gained popularity across multiple disciplines over the past decade. Widely...
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Abiotic Catalysis of the Maillard and Polyphenol-Maillard Humification Pathways by Soil Clays from Temperate and Tropical Environments
The Maillard reaction and integrated polyphenol-Maillard reaction are regarded as important pathways in natural humification. Little is known about...
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An X-ray photoelectron and absorption spectroscopic investigation of the electronic structure of cubanite, CuFe2S3
X-ray photoelectron and absorption spectra have been obtained for natural specimens of cubanite and compared with the corresponding spectra for...
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Carbonate-induced structural perturbation of Al hydroxides
The chemistry of Al transformation has been well documented, though little is known about the mechanisms of structural perturbation of Al...
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Chemical composition of solutions in macro- and micropores in the upper horizons of soils in the Central Forest State Biosphere Reserve
The average concentrations of Al, Si, Fe, Mn, Pb, Ni, V, Ba, and other elements were 1.5–3.5 times lower (in some cases, up to 60 times) in the...
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Preservation of iron(II) by carbon-rich matrices in a hydrothermal plume
Hydrothermal venting associated with mid-ocean ridge volcanism is globally widespread
1 . This venting is responsible for a dissolved iron flux to the...
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Techniques for Investigating Early Life on Earth
It is generally agreed that three independent and mutually supporting lines of evidence are required for any claim of early life to be compelling:...
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Spatial complexity of soil organic matter forms at nanometre scales
Organic matter in soil has been suggested to be composed of a complex mixture of identifiable biopolymers
1 rather than a chemically complex humic...
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Microbially influenced formation of 2,724-million-year-old stromatolites
Laminated accretionary carbonate structures known as stromatolites are a prominent feature of the sedimentary record over the past 3,500 Myr (ref.
1 )....
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Organic matter stabilization in soil microaggregates: implications from spatial heterogeneity of organic carbon contents and carbon forms
This study investigates the spatial distribution of organic carbon (C) in free stable microaggregates (20–250 μm; not encapsulated within...
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Nucleation, Growth, and Aggregation of Mineral Phases: Mechanisms and Kinetic Controls
The formation of any phase, whether natural or synthetic (Fig. 7.1), is usually a disequilibrium process that follows a series of steps until a...
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Pentlandite sulfur core electron binding energies
A number of freshly abraded surfaces of pentlandite have been characterised by X-ray photoelectron spectroscopy to establish whether the initial...
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Chemical composition of aquatic dissolved organic matter in five boreal forest catchments sampled in spring and fall seasons
The chemical composition and carbon isotope signature of aquatic dissolved organic matter (DOM) in five boreal forest catchments in Scandinavia were...
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Sulfur electronic environments in α-NiS and β-NiS: examination of the relationship between coordination number and core electron binding energies
X-ray photoelectron spectra have been obtained under the same experimental conditions for synthetic α -NiS and natural β -NiS in order to establish any...
