Document YjakaBr35N1025R3br9rEkjNn

k f' V. r t . f IV .AiaMffiHsnsi -i ly.*i>=i>t` 1'teust JLkli. * , f. .1' August, I960 .. .i's "lov'*;. ,t C<iu of Probable Uonu Marruu Anihravo;.ie. D. Miller. TiIu-l'jVj pt. 195'jJI / Ciou history Is pru*cntud it; which aspiration* of bong marrow, taken /rout both ;..o stumum unJ Hide crest during examinations fs'r an auumtc condition, demonstrated a uryiyn malenal to b present. This muturih) was presumed to be carbon on the Laip of its runco. its resistance to the action of strong ueld, and alter ruling out other possibilities. Alth.iijju thu patumt h.td worked over 40 years in the iminuiucturo ol bricks and had a very i,a.*/ ,`apeaui;i tu mineral dusts, ho specifically denied any prolonged contact with dust. ..: resemblance io u;t incident previously duscribcd <l'?2V> In the literature in which there a* an ai.ii'rnce.ti* Involving the bnnu marrow, is noted. Deposition of mineral dusts in u*. r..p*.iim>ii.iry sites, especially in the lymphatic druiungv of the liver and spleen, has hem; ..r.-'vn iw <'ccur in some casus of pneumoconiosis, - - AKCA Abst*. Tl> noui ,ch* bcrcre* t .10- it { >1. be it vet; rr OlP* ploy tie* nr# r* PHYSICAL ASPECTS OK THE ENVIRONMENT i Implications of Space Radiations In Manned Spice Flights, W. H. Langham, Aerospace Mud. 3jD, 6 (June 1959). Bused upon present physical measurements of ionicing radiations in space, 1 niojur radio-biologic-problerB areas in manned space /lights are suggested. These are: It) the biologic effects of densely ionising primary cosmic-ray particles and (J) the effects I the particulate radiation belts, the Van Alton layers, associated with the earth's magnetic licit!*. The dose from secondary radiations in the earth's atmosphere at an altitude of about ', COO feet is only about 100 mrad per week in thu northern latitude where it is at a maxi- The primary cosmic particles consist of about d(>7* protons, 19'/# alpha particles, and *i nuclei of elements of atomic numbers greater than 2. Above the oarth'i atmosphere, the rimary cosmic-dose rate drops to about bO tu 70 mrad per week. There is only Inferential ;:::wruation regarding the relative biological effectiveness of this radiation, since no accelera tor* exist which are capable of producing particles in the laboratory analogous to the heavier J l :'-Hh-unergy components of primary cosmic rays. It seems unlikely that the existence of' a hu*v> primary cosmic ray problem should be a deterrent to low-orbiting manned space flights "i the near future. Tho rough estimate of the dose rate in the 2 Van Allen layors is 10 and 100 r#0# per hour anil the thickness of thu bulto 2,000 and 4,000 miles respectively. Knowledge Is about the characteristics of this radiation bofore the hssard may be evaluated and steps * to alleviate it. -- J, Occ. Med. Absts. j * ilg^iopmcnt of Heat Pyrexia. J, Cold. J- A:n. Med. Aesn. 173, 1175-1182 (July 16, I960). In a study of heat stroke, more than 250 observations were made on healthy adult mo;ects. Data were obtained on body beat storage, sweat rate, sweat replacement, ** nJ pressure, venous pressure, oxygon consumption, blood gas analyses, hemuconcenirstlun, ( -`J o*;iolarity; and on cardiac output, cardiac shadows, and auscultatory and electrocsrdio- findings. During extreme heat exposure there was an increased veti jus p> e.,rar . i ,9 operational arteriovenous shunt (orTTlTfunctional equivalent) In the pr*e;r. . t :s postulated that (I) the primary event In the circulatory collapse of hw.t \\ a>u \ m,,: -'P'.'. cardiac failure, (2) the cesaetlon of sweating is the result of rising venous pressure, '^^ncr persons are more susceptible because of irreversible circulatory changos, and (4) 1:1 uifcctive treatment may be the intravenous administration of saline solution together with rpld digitalisation. --Editor's summary I 21