Covalent vs. Dative Bonding in Carbon Monoxide and Other 10-Valence-Electron Diatomics.

Valence bond theory (VB) was used to determine the extent and driving forces for covalent vs. dative bonding in 10-valence-electron diatomic molecules N, CO, NO, CN, P, SiS, PS, and SiP. VBSCF calculations were performed at the CCSD(T)/cc-pVDZ optimized geometries.

A 'Tuba Drain' incorporated in sink drains reduces counts of antibiotic-resistant bacterial species at the plughole: a blinded, randomized trial in 36 sinks in a hospital outpatient department with a low prevalence of sink colonization by antibiotic-resistant species.

Background: Multi-resistant Gram-negative bacteria (GNB) survive in hospital drains in traps that contain water and may ascend into the sink because of splashes, or biofilm growth.

Aim: To investigate whether the 'Tuba Drain' (TD) a long, bent, continually descending copper tube between the sink outlet and the trap prevents the ascent of bacteria.

Methods: After initial laboratory tests confirmed that the TD prevented bacteria in the U-bend from splashing upwards into the sink outlet, TDs were assessed in a randomized, blinded trial in a hospital outpatient department built in 2019.

Using mobile eye-tracking to evaluate gaze behavior during a speech in pediatric anxiety disorders.

Background: Altered gaze in social settings is a hallmark of social anxiety; however, little research directly examines gaze in anxiety-provoking contexts among youth with anxiety disorders, limiting mechanistic insight into pediatric anxiety. The present study leveraged mobile eye-tracking technology to examine gaze behavior during a naturalistic stressor in a clinical developmental sample.

Methods: Sixty-one youth (ages 8-17 years; 28 with anxiety disorders, 33 non-anxious controls) completed a naturalistic social stress task (public speaking in front of a videotaped classroom audience) while wearing eye-tracking glasses.