BACKGROUND Previous studies have found that high and cold temperatures increase the risk of childhood diarrhea. However, little is known about whether the within-day variation of temperature has any effect on childhood diarrhea. METHODS A Poisson generalized linear regression model combined with a distributed lag non-linear model was used to examine the relationship between diurnal temperatur...

Continental summer-time aerosol in the Italian Po Valley was characterised in terms of hygroscopic properties and the influence of chemical composition therein. Additionally, the ethanol affinity of particles was analysed. The campaign-average minima in hygroscopic growth factors (HGFs, at 90 % relative humidity) occurred just before and during sunrise from 03:00 to 06:00 LT (all data are repor...