An Icosahedral 55-Atom Iron Hydride Cluster Protected by Tri--butylphosphines.

Nanoclusters are nanometer-sized molecular compounds characterized by significant metal-metal bonding and low average oxidation states, and they exhibit unique properties distinct from those of small metal complexes or nanoparticles. Unlike noble metals stable in metallic forms, the synthesis of nanometer-sized iron clusters has been precluded by the relatively weak iron-iron bonds and the high reactivity of low oxidation state iron, despite the extensive history of molecular iron compounds. Here, we report the synthesis and characterization of a cationic 55-atom iron cluster with a 1.

LAP-MALDI MS analysis of amelogenin from teeth for biological sex estimation.

The biological sex estimation of human individuals can be achieved by extracting fragments of the amelogenin protein from small areas of tooth enamel. The amelogenin gene can be found on both sex chromosomes (X and Y) with chromosome-specific differences in its sequence, and consequently the sequences of the expressed protein in teeth. Virtually all current analytical techniques used to identify the occurrence of the male Y chromosome-specific proteoform employ proteoform-specific peptide analysis by LC-ESI MS/MS, which typically results in longer analytical times due to the LC separation step, despite recent efforts of shortening the LC step.

State-level trends in access to Medicaid family planning services, 2008-2023.

Objective: To characterize the landscape of policies that determine eligibility for family planning services through Medicaid programs and describe trends in eligibility and its determinants over time.

Data Sources And Study Setting: Secondary data were collected for all states in the United States for the years 2008 through 2023. Data on economic and demographic characteristics came from the American Community Survey (ACS).