Ferric iron stabilization at deep magma ocean conditions.

FeO produced in a deep magma ocean in equilibrium with core-destined alloy sets the early redox budget and atmospheric composition of terrestrial planets. Previous experiments (≤28 gigapascals) and first-principles calculations indicate that a deep terrestrial magma ocean produces appreciable Fe but predict Fe/ΣFe ratios that conflict by an order of magnitude. We present Fe/ΣFe of glasses quenched from melts equilibrated with Fe alloy at 38 to 71 gigapascals, 3600 to 4400 kelvin, analyzed by synchrotron Mössbauer spectroscopy.

Health Care Delivery Site- and Patient-Level Factors Associated With COVID-19 Primary Vaccine Series Completion in a National Network of Community Health Centers.

To assess multilevel factors associated with variation in COVID-19 vaccination rates in a US network of community health centers. Using multilevel logistic regression with electronic health record data from ADVANCE (Accelerating Data Value Across a National Community Health Center Network; January 1, 2022-December 31, 2022), we assessed associations between health care delivery site-level (n = 1219) and patient-level (n = 1 864 007) characteristics and COVID-19 primary vaccine series uptake. A total of 1 337 440 patients completed the COVID-19 primary vaccine series.

The Impact of Structural and Meso-Level Factors on Caregiver Coping Abilities When Supporting a Child with Cancer: A Qualitative Study.

Family caregivers of children diagnosed with cancer often experience periods of significant stress. We provide an in-depth examination of the impacts of structural (health care and leave policies) and meso-level (organizations and communities/social networks) factors on caregiver coping during childhood cancer treatment. We conducted a secondary analysis of a comprehensive qualitative dataset examining the impacts of structural and meso-level factors on caregiver coping from in-depth, semi-structured interviews with 49 caregivers representing 38 unique cases of childhood cancer.

Deep, hot, ancient melting recorded by ultralow oxygen fugacity in peridotites.

The oxygen fugacity (f) of convecting upper mantle recorded by ridge peridotites varies by more than four orders of magnitude. Although much attention has been given to mechanisms that drive variations in mantle f between tectonic settings and to comparisons of f between modern rocks and ancient-mantle-derived rocks, comparatively little has been done to understand the origins of the high variability in f recorded by peridotites from modern mid-ocean ridge settings. Here we report the petrography and geochemistry of peridotites from the Gakkel Ridge and East Pacific Rise (EPR), including 16 new high-precision determinations of f.