Document 2Nzn1DYZ6nrLbr0vp18mXrVq7

Industrial Hygiene Digest - 21 H953 494 A Critical Review of the Chemical Theory of Silicosis. JLuise Hcslsaajdia], 3eitr." Silikose-Forsch. No. 15, 1-19 (1952) German. The solubility theory is first reviewed and reasons are qmuv, w&y M. cannot be maintained in its original form, which says that silicosbs. la; dfcite tbo dissolved silica. The main argument is that silicosis requires yraarsi Urn (develop, while the solubility of quartz drops in the course of .days or weeks;,, .A, 'nm'Dvdaiied solubility theory is suggested by the author ' s published work aanrf'. com Baer recent results with carbohydrates. From plant extracts, a fraction cottttaiiaaim;g carbohydrate and silica could be isolated, and experiments with H'oodi amd quartz .howed specific adsorption of a galactose complex. The galactose^ .idbKairibted on quartz still reacts with hydrazine, demonstrating that the aldehyde? (gn-camp does not take part in the, reaction with quartz. Next follows a very sjgxRcniLaMve chapter dealing with the structure of silica-galactose complexes. GMQLagm i s raid to contain galactose but-there is no evidence on its structure,. HHtas sa/.one reaction can be used to demonstrate.quartz in human silicottia:. .OeviBams,, as /ell as to demonstrate galactose adsorption on quartz, and a nundier oof (caalured .^lustrations of this effect are shown. Electron micrographs of sew^endiiine asbestos after disintegration in water are also shown. -- Gond. from Bj31L ISfc.. . *95 Considerations on a Case of Progressive Massive Silicosis Followahrg gteas* limited Exposure. M. Bodo and L. Briccarello. Rass. med. ikrai.. 133-238 (May-June 1952) Italian. The authors discuss a case of progressive massive siliK&aiiss ttfiu* lungs which was seen by them in April, 1951. The patient was a metealil 'wn>rik- er, aged 28, who had been employed, 'for 2 years only, at chiseling/g^nruakstaaes in 1939-40. Signs and symptoms of silicosis, which are described!,, tagjjpeairad in November, 1950. At the time of the examination, signs and sgyni.gttttnnsi wre said to be stationary. Tuberculosis was absent. X-rays showed as gpenaM*]lized deep and confluent shadow on the lungs, except for clear areas vwiiV/b rmay 3aaw been due to spontaneous pneumothorax or to localized emphysema... In tfibo; lighit of this case, the authors question the statement that simple pneumonnrmiDiBiias can be arrested by removing the patient from exposure to dust. The.- ttmireagry to progress varies with the physico-chemical properties of the das# amd aifo<e individual tissue reactivity. As in the case of hepatic cirrhosis, !il'tes fiajai-saHAi/e agent may start a chain reaction which does not stop progressing after ttHme cause has been removed. -- Cond. from BiiEL SEygr., Usefulness of the Photoroentgen Method in Silicosis and A sbestos&j; .lh:.v/e;si!tii- gations of Workers. E. Zanetti. Rass. med. ind. 2_1_, 130-132 jstalian. A comparative study of several tens of thousands of phokmorjroiljgeaa films and roentgenograms has produced several interesting concluumi& cccmcerning investigations of silicosis and asbestosis among workers. 33-. imami.. photoroentgen films were found to represent clearly massive silkasviis'-,, advanced