Document jNaBBn3Nw17gk1RrmmM7mRg0N

Industrial Hyglvns Digest February, HS6 199 IfticH of Acute Industrial Poisoning with Carbon Monoxide. U. NtmtU tod J. Vi|ur. Pratami Lakaratvi 7., 2bfl-273 (1944). Bahtwli. Of 59 persou recovered from carbon monoxide poisoning 52 showed positive aad- lags: extra-pyramidal symptomatology, vegetative stigmatization. lsstons at the pyramidal system, and cerebellar symptom*. -- Cham. Abate. 196 A Roentgenologic Study of * Homan Population Exposed to High-Fluoride Damastlc Water: A 10-Year Study. M. C. Leone, C. A. Stevenson. X. F. unhimhl ..h u r. ~ Am. J. RoeatganoL 74, 874-485 (Nor. 1955). Roentgenograms wars m*da sod reposted with, m*toting daws taa years Istor la 237 persons, 116 of whom wara residing la s high-fluoride are* la Taxss with. 8 ppm of fluoride la drinking wstor, sod tha othar 121 la s coatrol sras wfaara tha wstar cootaioad 0.4 ppm o( Cuorlda. fioaa changes ara dascribad la detail. Tha data suggast that excesslra Cnoridas may prodnea roeatgsoogrcphlc arldaaea at boaa ehaagas, bat tha obaarvobla chaagas occur la only 10 to 15% o< those exposed. They are slight, oltaa difficult to recogatao, aad la oust cases equivocal la degree. The only other physical (ladings ara dental mottling la parsoaa who resided la tha hlgh-Caorldo area daring tha tooth formative period. These boaa change* cannot be definitely ascribed to excessive OaorldM. area though the Cluorlde caateat of da boas* may be six time* that at norms! baa*. The Increased Caorlda may os occasion bare a baaeflclal effect.la tha adult boaa. 19T Nitrogen Oxide ImparlUas la Oxona. B. E. Saltanan. D. K. Byers, and Frances L. Hyslop. lad. Eng. Cham. 48, 115-114 (Jan. 1956). Tha artant of prodactloa of altrogea oxides by an oaooiaer with a pheanl-Carmalde- hydn rasln dlolactric wu studied. Under normal operating condition* tha nitrogen oxides produead wars lass than 5% at the oxona cooeanixatlsa; trader tha most adrarse o< air Cow aad voltage the raise was 8.5%. This rasalt agrees with those o( previous stadias. A study ot tha kinetic aad equilibrium dots la the literature showed that of all the osides o( nitrogen sad related compounds,. only nitrogen dioxide, nitrogen pentoxlda, aad nitric acid vapor required consideration as imparities In oxona. The nitrogen dioxide was determined to be only a small portion of the total Imparity. When oxona wax present la large excaaa, tha oxidation of nitrogen dioxide was nearly complete. Some dam indicated that altrogea pentoxide was hydrated with extreme rapidity to nitric acid vapor, which Is thermodynam ically stable. The chemical stadias were valuable tor Interpreting the toxicologic results, which ludtcate that tha nitrogeu dioxide Impurities in asaae as ordinarily prndueed are not an important (actor in the toxicity o( oxona. These results also have a bearing on the toxicity o( ozone as an atmospheric pollutant. -- Cond. (rom authors' cooclastons 198 Effect o< Cadmium ou Blood Pressure and Respiration and the Pee of Dtmercaptol (BAL) as Antidote. T. Daihamn andL. Friberg. Acta Pharmacol, et Toxicol. 10. 199-203 (1954). la eats and rabbits the Intravenous Injection of 0.3-0.5 mg. par kg. at cadmium (aa sulfate) caused a rapid, moderate fall In blood pressure but bad no consistent effect on respiration. Previous Intramuscular Injection of BAX. or Intravenous Injection of BAL- glacostdo prevented the effect. -- Chons. Abets. ii m 199 Experiments Bearing upon the Idas that Gastric Clear fa Frequent among Chromium Workers. M. Moaiagsr and H. Florentlni. Axck. maladies profess, lo. 378-380 (1955). French. A number of references have appeared In literature relating to the occurrence of gastric ulcer In persona working with chromium compounds. A series of experiments Is described In which various animals wore given neutral potassium chromate, orally, Intra venously, subcutaneously, Intraporltonoally, parcutanoously, or by luhoUtiou of aa aerosol. Administration continued over varying periods up to one year. In tha 66 animals no cose of a true gastric ulcer was seen, although some cases of gastrltla, esophagitis, aad latarstitial enteritis were found. Chronic ulcers did not occur, oven by lagestlou of neutral potassium `chrornate over long periods. The suggestion Is therefore advanced that other (actors must be present when (astro-duodenal ulcers hare been observed among chromium workers. -- Cond. froai BulL Kyg. 10.