D. Singleton results 27
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Sodic-calcic alteration and transpressional shear along the Atacama fault system during IOCG mineralization, Copiapó, ChileNARA Subscribed
The Punta del Cobre district near Copiapó is a center of iron oxide-copper–gold (IOCG) mineralization spatially and temporally associated with regional sodic-calcic hydrothermal alteration, the Atacama fault system (AFS), and two phases of Early Cretaceous magmatism. Here, we investigate the spatiotemporal and geochemical relationships between magmatism, ductile deformation, and hydrothermal alteration along the ~ 200 to 300-m...
Common, low-frequency, rare, and ultra-rare coding variants contribute to COVID-19 severityNARA Subscribed
The combined impact of common and rare exonic variants in COVID-19 host genetics is currently insufficiently understood. Here, common and rare variants from whole-exome sequencing data of about 4000 SARS-CoV-2-positive individuals were used to define an interpretable machine-learning model for predicting COVID-19 severity. First, variants were converted into separate sets of Boolean features, depending on the absence or the pr...
The density of odontocete integument depends on blubber lipid composition and temperatureNARA Subscribed
Cetacean integument serves many functional roles, including contribution to whole body buoyancy. The blubber of the integument of different cetacean species contains varying concentrations of triacylglycerols (TAG) and wax esters (WE); generally, these lipid classes have different densities. Integument can also experience a wide range of temperatures during a dive, so its density may change with depth. The goals of this study...
Connectivity Planning to Address Climate ChangeNARA Subscribed
As the climate changes, human land use may impede species from tracking areas with suitable climates. Maintaining connectivity between areas of different temperatures could allow organisms to move along temperature gradients and allow species to continue to occupy the same temperature space as the climate warms. We used a coarse‐filter approach to identify broad corridors for movement between areas where human influence is low...
Stable‐isotope probing of the polycyclic aromatic hydrocarbon‐degrading bacterial guild in a contaminated soilNARA Subscribed
Summary The bacteria responsible for the degradation of naphthalene, phenanthrene, pyrene, fluoranthene or benz[ a ]anthracene in a polycyclic aromatic hydrocarbon (PAH)‐contaminated soil were investigated by DNA‐based stable‐isotope probing (SIP). Clone libraries of 16S rRNA genes were generated from the 13 C‐enriched (‘heavy’) DNA recovered from each SIP experiment, and quantitative PCR primers targeting the 16S rRNA gene we...
Summary Uncultivated bacteria associated with the degradation of pyrene in a bioreactor treating soil contaminated with polycyclic aromatic hydrocarbons (PAH) were identified by DNA‐based stable‐isotope probing (SIP) and quantified by real‐time quantitative PCR. Most of the 16S rRNA gene sequences recovered from 13 C‐enriched DNA fractions clustered phylogenetically within three separate groups of β‐ and γ‐Proteobacteria unass...