BMI Trajectories from Birth to Young Adulthood.

Objective: This study aimed to compare BMI trajectories from childhood to early adulthood in those with overweight and/or obesity versus severe obesity.

Methods: Longitudinal BMI values (2,542 measurements) were calculated from measured heights and weights for 103 children, adolescents, or young adults with overweight, obesity, or severe obesity. Segmented regression with splines was used to model BMI trajectories.

Mid-infrared complex refractive indices for oleic acid and optical properties of model oleic acid/water aerosols.

Frequency-dependent, complex refractive indices for oleic acid in the mid-infrared have been retrieved from aerosol extinction spectroscopy from 750 to 5000 cm(-1). The major absorption bands can be attributed to the relevant vibrational modes of the acid, including those that originate with the hydrogen bond induced dimerization through the carboxylic group. The newly reported indices for oleic acid are used to investigate the optical properties of model core-shell aerosols formed by coating a water droplet with a layer of oleic acid.