Observational evidence reveals the significance of nocturnal chemistry in seasonal secondary organic aerosol formation.

Oxidized Organic Aerosol (OOA), a major component of fine atmospheric particles, impacts climate and human health. Previous experiments and atmospheric models emphasize the importance of nocturnal OOA formation from NO· oxidation of biogenic VOCs. This seasonal study extends the understanding by showing that nocturnal oxidation of biomass-burning emissions can account for up to half of total OOA production in fall and winter.

PP063. Carotid artery stiffness and elasticity in gestational diabetes.

Introduction: Gestational diabetes (GMD) is gaining in importance in prenatal care due to it's increasing prevalence. These women do have a higher risk for disrupted elasticity and stiffening of the carotid artery. Aim of this study was to assess carotid intima media thickness (IMT) and vessel wall changes during pregnancy and postpartum.