Pharmacological Cognitive Enhancement Among International Medical Students: Assessing Study Habits as a Novel Factor.

Introduction: Pharmacological cognitive enhancement (PCE) among healthy individuals with off-label use of medications raises ethical and safety concerns in academia. Among the few studies that have examined this phenomenon in medical students, the desire to improve performance and cope with high levels of stress are the most common associated factors implicated. Our main objective was to update current literature by exploring a novel factor by investigating the association between PCE use and student learning approaches among a cohort of international medical students.

Identification of essential arginine residues of Escherichia coli DedA/Tvp38 family membrane proteins YqjA and YghB.

Escherichia coli DedA/Tvp38 family proteins YghB and YqjA are putative membrane transporters with 62% amino acid identity and overlapping functions. An E. coli strain (BC202) with nonpolar ΔyghB and ΔyqjA mutations displays cell-division defects and temperature sensitivity and is sensitive to antibiotics and alkaline pH.