[Trans-muconic (t,t-MA) and S-phenilmercapturic acid: two biologic markers of benzene low dose exposure].

The aim of our study is the comparison between two different biological exposure index, trans-trans-muconic acid (t,t-MA) and S-phenylmercapturic acid (S-PMA), that are minor metabolites of benzene, in the exposure to low concentrations of benzene, to estimate which shows better correlation with the environmental exposure. The study has been conducted upon a sample of 105 male workers in a petrolchemical plant in Sicily. The environmental monitoring data has shown exposure levels within acceptable limits compared with TLV, and these levels have been confirmed by biological monitoring data.

Fundal height measurement. Part 3--The effect of maternal position on fundal height measurements.

The effect of maternal position on fundal height measurements was studied in 192 nonobese women between 21 and 36 weeks of gestation. Four clinicians participated in the study and each clinician obtained measurements on 48 women. Fundal height measurements were obtained in each of four positions: supine; trunk elevation; knee flexion; and trunk elevation with knee flexion.