Document 10RddBebNpJZnLoa3Oobkzp0K

Induatnal Hygiene Difeet June, 1965 COMMUNITY AIR HYGIENE 59? Obaervatione on Air Pollution Aapecta of lraau Volcano, Cotta Rica. R. J.M. Horton and R. <5. IdcCaldia. Public Health Rapt a. 79'. Tbet. Bated on obttrvationt, examination of available data, and anaiytea of limited tamplet, it appeart that the heavy athfall rcaulting from the recent volcanic activity of lraau, in Cotta Rica, containa a tubttantial portion of particlet in a retpirable aixe range. The free tilica content of thete particlet it about 1%, which minimiaea the tilicoait haaard. Although tulfur gaaet have not been meatured, reporta of taate and odor indicate that they may be only minor factors in the emiaaione from Mt. lraau. During perioda of volcanie activity, the aahiall reportedly reducea viaibility, geta into clothing, hair, and eyea, and ia a general nuiaance. Specifically, it cauaea a redneaa and burning of the eyea, a dry, raw, and tore throat, and irritation of the airway paaaagea. All theae effacta apparently aubaide rapidly when expoeure to the aah caaaea. - - Cond. from APCA Abata. 598 Environmental Conditiona Affectlnfcche Uae of f*l'anta aa Indicktora of Air Pollution. d. Seidman, I. J. kindawi, and W.w, Heck. J. Air Poll. Control Aaan. 1_9_, 168-170 {April, 1965). The preaent atudy waa initiated to determine the effect of atomatal opening, aoil, and nutrient level on the aenaitivity of planta to photochemical air pollutanta. The reaulta of the Inveatigation indicate that: (1) Chemical control of atomatal opening reducea air pollution injury to planta. (2) Reduction of water to planta haa been ahown to greatly reduce vegetative damage from photochemical air pollutanta. (3) Planta grown in aoil are teae aenaitive to irradiated automobile exhauet than are planta grown in vermiculttc. (4) Nutrient level appeara to be related to the aenaitivity of pinto bean to natural amog. 599 Apparent Photoayntheaia aa a Meaaure of Air Pollution Damage. O.C. Taylor, E.A. Cardiff, and J.D. Meraereau. J. Air Poll. Control Aaan. 15, 17117i' (April, 1965). The meaaurement of rate of carbon dioxide exchange by planta ia a preciae method of determining poeaible effecta of environment, including air pollutanta, on growth and development. A procedure waa developed by which auch meaaurementa can be made on portiona of mature treea growing in the field. With thla procedure it it poeaible to atudy the effecta of pollutanta aa they occur in the ambient atmoaphere. The incite cell through which air Dow can be meaaured accurately and the internal reflector light aource provide a uniform and meaaurable environment for the encloaed tree branchea. The effecta of apecific toxicant a can be atudied individually with tingle leavea or amall teedlingt uaing a mlmaturiaed carbon dioxide meaauring ayatem and fumigation facilitlea in the laboratory - Author a' aummary 600 Charactertaation of Carbaxole and Polynuclear Carboaolea in Urban Air and in Air Polluted by Coal Tar Pitch Fumea by Thin-Layer dnromatography and ^pectrophotofluorometry. D. F. Bonder, E. Sawicki and R.M. WiiaorwJr Intern j. Air and Water Poll. 8, ij3-643 (Dec 1964 The pretence of carbacole in urban air aamplca and of polynuclear carbaaolea in certain aource aamplea ia ahown for the firat tune Carbatola la found in the benaene-aoluble particulate and in the aromatic fraction of the benxenc.tolubic particulate from urban air. Certain aource aamplea contain 11 H-benao (a) carbaxole and ?H.bento (c) carbaaole in addition to carbaxole The already known pretence of theae polynuclear carbaaolea and of 5 H-benao (b) carbaxole in coal tar pitch aamplea can be demonatrated readily with thin.layer chromatography and apcctro- photoDuorometry in alkaline N, N-dimethylformamide. Samplea containing carbaaole include the compoaite benaene-aoluble particulate from the air of 150 United Sirea commuaitiea, he aromatic fraction of the benaene-aoluble particulate from the air of a civ , air polluted by coal tar pitch tarring operationa, and a coal tar pitch aample. There are 14 reference a. t ., .. Cond. from Public Health Eng. Abata. n. 01 132 2678