Assessment of multipathway exposure of small children to PAH.

The aim of study was to assess the uptake of polycyclic aromatic hydrocarbons (PAH) by children living in a city and its effect on 1-hydroxypyrene (1-OHP) excretion. Two groups of children (n=11 and 13; 3-6 years old) were chosen: (1) a group from a kindergarten situated near a road with a high traffic density ('polluted' area); (2) a group from a kindergarten situated in a green zone ('non polluted' area). Food consumption was recorded in all children and PAH uptake from foodstuffs was estimated.

Variations in EEG coherence as an index of the affective content of dreams from REM sleep: relationships with face imagery.

EEG coherence was examined in relation to four measures of socioemotional dream content, including a new measure--the proportional representation of a character's face. Twenty-four healthy subjects, recorded for sleep stages and EEG activity, were awakened from REM sleep to report dream mentation and to rate it on these variables. Coherence scores were calculated for homologous interhemispheric electrode pairs (Fp1-Fp2, F3-F4, F7-F8, C3-C4, P3-P4, O1-O2, T3-T4, T5-T6) and for left and right intrahemispheric pairs for delta, theta, alpha, beta1, and beta2 frequencies.

Type-specific antigens of Neisseria meningitidis serogroup A.

By using Ouchterlony immunodiffusion techniques, we defined three unique antigenic determinants (A1, A2, and A3) among six isolates of Neisseria meningitidis serogroup A. Two of these determinants (A2 and A3) were identified as lipopolysaccharides in nature and were not found to occur on the serogroup B strains of N. meningitidis that we examined.