Nanoscale characterization of space weathering in lunar samples.

Nanoscale Fourier transform infrared (Nano-FTIR) imaging and spectroscopy correlated with photoluminescence measurements of lunar Apollo samples with different surface radiation exposure histories reveal distinct physical and chemical differences associated with space weathering effects. Analysis of two sample fragments: an ilmenite basalt (12016) and an impact melt breccia (15445) show evidence of intrinsic or delivered Nd and an amorphous silica glass component on exterior surfaces, whereas intrinsic Cr and/or trapped electron states are limited to interior surfaces. Spatially localized 1050 cm/935 cm band ratios in Nano-FTIR hyperspectral maps may further reflect impact-induced shock nanostructures, while shifts in silicate band positions indicate accumulated radiation damage at the nanoscale from prolonged space weathering due to micrometeorites, solar wind, energetic x-rays and cosmic ray bombardment.

Sociodemographic predictors of imaging utilization in children with right lower quadrant pain.

Background: Inequities in health care access lead to inequities in outcome. In recent years, health outcome disparities have been documented in children with acute appendicitis and sociodemographic predictors of imaging utilization have not been adequately assessed.

Objective: The purpose of our study is to assess sociodemographic predictors for the diagnostic imaging of children with right lower quadrant (RLQ) pain.

Discussions about physical activity in general practice: analysis of video-recorded consultations.

Clinical guidance recommends promotion of physical activity during general practice consultations. The frequency and content of physical activity discussions in UK general practice are poorly understood. To explore the content of physical activity discussions during routine consultations between patients and general practitioners (GPs).