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Lead fractionation and availability in contaminated soils: a comparative study of organic wastes and zeolite as stabilizing agentsNARA Subscribed
Lead (Pb) contamination in soils is a major environmental concern due to its persistence, toxicity, and bioaccumulation. This study evaluated the effects of organic amendments (sewage sludge, cattle manure, and poultry manure) and zeolite with different particle sizes (< 0.4, 2–8, and > 8 mm) applied at 1, 5, and 10% (v/v) on Pb mobility and availability in soil contaminated with Pb-rich mine tailings. Soil pH and acid-labile...
Behavioral variation across multiple phases of intravenous cocaine self-administration among genetically diverse mouse populationsNARA Subscribed
Genetic and other predisposing factors can influence the progression from initiation of drug intake to compulsive substance use through distinct biobehavioral processes. Operant cocaine self-administration studies in laboratory mice offer a powerful method to dissect the biology of this progression from initiation, dose-response, extinction, and cued reinstatement in a controlled, tractable system. However, many such studies e...
SNAPSHOT USA 2024: Year 6 of the Coordinated National Camera Trap Survey of the United StatesNARA Subscribed
Motivation SNAPSHOT USA is an annual, multi‐contributor camera trap survey of mammals across the United States. The growing SNAPSHOT USA dataset is intended for tracking the spatial and temporal responses of mammal populations to changes in land use, land cover and climate. These data will be useful for exploring the drivers of spatial and temporal changes in relative abundance and distribution, as well as the impacts of speci...
Steady-state P800 oxidation kinetics indicate that heliobacterial phototrophy is light-limitedNARA Subscribed
The heliobacteria are a family of phototrophic bacteria known for their unique production of bacteriochlorophyll g and for their use of the simplest known Type I reaction center. In this work, we characterize P800 oxidation kinetics in whole cells of Heliomicrobium modesticaldum under the continuous illumination that is more consistent with in vivo conditions, an area of research that remains largely unexplored. When assayed a...
As part of the ongoing system modernization, the Russian navigation satellite system GLONASS has specified a dedicated electron density model supporting ionospheric path delay corrections for single-frequency navigation users. Solar-geophysical parameters for use with this model are made available through the code division multiple access (CDMA) signals, transmitted by selected GLONASS-K1, -K2 and -M+ satellites on the L3 and...
Islands Promote Diversification of the Silvereye Species Complex: A Phylogenomic Analysis of a Great SpeciatorNARA Subscribed
Geographic isolation plays a pivotal role in speciation by restricting gene flow between populations through distance or physical barriers. However, the speciation process is complex, influenced by the interplay between dispersal ability and geographic isolation, as seen in “great speciators” – bird species that simultaneously have broad island distributions but high levels of subspecific diversity. Comparing genomic populatio...