Une mŽthode indirecte pour cartographier les gaz bržlŽs dans un moteur ˆ allumage commandŽ a ŽtŽ dŽveloppŽe. Elle est fondŽe sur une visualisation ˆ partir de la fluorescence induite par laser (LIF) du mŽlange air-carburant non bržlŽ et ensemencŽ avec du biacŽtyl. Les gaz bržlŽs provenant ˆ la fois des recirculations internes et externes sont observŽs. Ce type de diagnostic est complŽmentaire d...

BACKGROUND Fluoride is an essential element for human health. However, excess fluoride in drinking water may cause dental and/or skeletal fluorosis. Drinking water is the main route of fluoride intake. The aim of the present study was to measure fluoride levels in human breast milk collected from two regions of Golestan Province, northern Iran with different amount of fluoride concentration of ...

Minority-race children in North America and Europe often show less own-race favoritism than children of the majority (White) race, but the reasons for this asymmetry are unresolved. The present research tested South African children in order to probe the influences of group size, familiarity, and social status on children's race-based social preferences. We assessed South African children's pre...

The interparticle interactions in ultracold atomic gases can be tuned using Fano–Feshbach scattering resonances, which occur in low–energy collisions between two atoms. These resonances are usually obtained using an external static magnetic field. They turn ultracold atomic gases into an experimental playground for the investigation of novel phases in which Quantum Physics plays a key role. The...

A water-soluble transformation product of 2,4-D. Arch. Biochem. Biophys. 35: 171-175. 1952. 4. JAWORSKI, E. G. and BUTTS, J. S. Studies in plant metabolism. II. The metabolism of C'4 labeled 2,4-dichlorophenoxyacetic acid in bean plants. Arch. Biochem. Biophys. 38: 207-218. 1952. 5. MITCHELL, J. W. and BROW-N, J. W. Movement of 2,4-dichlorophenoxyacetic acid stimulus and its relation to the tra...

A new extraclion system has been designed and constructed which allows the extraction of gases from air bubbles in ice without melting it. The ice sample of abollt 500 g is crushed in an evacuated container by a milling cutter, and the gas escaping from the opened bubbles is collected by condensation at 15 K. Results of CO 2 analyses of extracted gases a re discussed with respcCI to possible co...