Document e5Gx0gqq0EKVGqae1G5970Lke

m m>>.&!} "i'St color produced is measured at 5JU millimicrons. Tim usual impurities and additives found in cyanamide preparations do not interfere* -- AC Briefs 2$6 Toxic Encephalopathy Apparently Related to the Use of an insect Repellent, Joyce Cryboeki, D. Weinstein and N. K. Ordway. New Engl. J, Mud. 26, 289-291 (Tub. 9, I96l|* A case of encephalopathy ia reported in a 3-yearo)d girl that may have been brought about by an agent in an insect repellent. Signs wore disorientation, staggering gait, slurred speech and episodes consisting of stiffening into a sitting position, crying out, extending the extremities, flexing the fingers and donifiexing the toes, Therapy consisted of Intravenous infusion of fluids and anticonvulsant medication. The assumed toxic agent was N-N-dlethyl- m-toluamide, which, in considerably higher doses, had produced similar signs and death In laboratory animals. -- Authors1 summary JS7 Some Effects of .Epoxv Compounds on the Blood. J. K. Kodama, et al. Arch. Environmental Health , SO* & I [Jan, 1961). The less complicated polyfunction*! epoxides, and monofunclior.a* epoxides with Is- auxiliary active groups, were shewn to be capable of producing deleterious effects on the hemopoietic system. Erythrocytes were sharply decreased by 6 of the 13 compounds, one iron of which did not alter the leukocyte picture or decrease the number of nucleated marrow eells. Six compound* decreased the leukocyte count significantly, and -1 decreased the number of nu- deated cells in the femora) marrow. It was possible for a compound to decrease the numbor of nucleated marrow cell* without decreasing the number of circulating leukocytes and vice versa, under the conditions of the experiment. The authors recommend that the radlomimetlc effects of these epoxides be considered when assessing the hazards involved in their applies* tion and handling, Authors' summary * r : t' V* INDUSTRIAL DUSTS field Evaluation of Ragweed Pullen Sumpters. E, C. Ogden and S. Raynor, f. Allergy 31. 307*316 iJufyVAug. IVOO). The authors' experiments have tli.it peilen capture by the standard Durham ampler Is determined by several factory, in addiiwjn to the concentration of pollen in the air. Aerodynamic factors ere responsible lur Ibc greater collecting ability of the slide when its long axis is placed parallel to the .iir flow, Orii-ni.tin>n uf the slide with respect to wind di rection may result in a S to i difference n u.ticl* between adjacent slides, U was also (ound thit the amount of pollen c.ipiired'iii~.r*ftMiClinM of the amount of air passing over the slide as wll *n (he concentration i*f pollen in the nit'. Thu*. .m increase of 3 tu 4 mph in wind speed m*y give more than 5U% Increase in tin* |H,llun <.i|Uor>'tl. Since wind speed normally increases with height, elevation ui the sampler abovi- tbe ground determines the wind spued to which the lidc i uxposud and effects the count. Tunis of . titter sampler showud that this device was *lso affucted by wind speed but in .in opposite iiohiiim', since efficiency in capturing particles In the pollen gir.e range decreases with increasing wind speed. Improvements in the standard ampllitg tcchnhpiu might include vane orientation ! Ihu slide sampler and measurement of th# airflow which could be used to correct the count, or the use of round or square slides with similar correction of wind speed. Public Health L'ngr, Absts. I