Medicine · Ophthalmology
Gunshot residue and brake-pad dust can have overlapping elemental compositions, making them difficult to tell apart with standard testing alone. In a preliminary study, Raman spectroscopy identified differences between the two particle types and could complement existing analysis.
Researchers reviewed studies of 748 children in sub-Saharan Africa who had confirmed foreign objects in their airways. They reported regional differences in the types of objects involved, along with an overall reported death rate of about 2%, but the evidence was limited and varied between studies.
A new analysis of US high school survey data found that teens who reported carrying firearms had higher odds of reporting a suicide attempt in the past 12 months. The association remained after adjusting for race and ethnicity and the strength of state firearm laws.
