EPA halts dieldrin production

Geminin halts DNA synthesis

Slingshot to the lamellipod he actin cytoskeleton at the front of migrating cells is an ever-changing species. Although actin is polymerized in the lamellipod, the filaments that are built remain dynamic. Their turnover is mediated by cofilin, which stimulates filament disassembly at or near the pointed ends, thus providing monomers for further polymerization. On page 465, Nagata-Ohashi et al. ...

Some Toxic Effects of Dieldrin in Rats.

Dieldrin is a technical product containing 85% of H.E.O.D., the approved name for 1,2,3,4,10,10,hexachloro-exo-6,7-epoxy1,4,4a ,5,6,7,8,8a-octahydro-exo -1,4, endo -5,8,dimethanonaphthalene. The remaining 15% of the technical product consists of active isomeric compounds. Dieldrin is a powerful insecticide that has been extensively used in agriculture, food storage, and public health work. Wher...

Toxicity and Metabolism of Dieldrin in Rats.

The main constituent of the insecticide dieldrin has been studied in male and female rats. The LD50s depend on the route of injection and, after intravenous infusion, on the rate of infusion. After oral injection of a 4% solution in arachis oil, deaths take place within six hours or from two to seven days later; but the first convulsion occurs at 40 min. over a wide range of doses. For further ...

Dieldrin and Breast Cancer: a Literature Review

Air pollution: EPA standard.

REPORTS Encounter with Venus: L. Colin. Initial Pioneer Venus Magnetic Field Results: Dayside Observations: C. T. Russell, R. C. Elphic, J. A. Slavin . . . . .. .. .. . . . . .... Plasma Waves Near Venus: Initial Observations: F. L. Scarf, W. W. L. Taylor, I. M. Green.................................. Initial Observations of the Pioneer Venus Orbiter Solar Wind Plasma Experiment: J. Wolfe et al...