40s ABSTRACTS vo . Iysogere bacte 0 r emp, wndand.s, Particula e: mutations Jilentical exp i. mb co the om Ipssness fr exposure to penetrating gummi rays at scnsitivity of these animals to protracted and acute ‘ te wR, of survaval of domestic atarnals; Various exposure rete hus provided a basis for the estimation unknown cousequcnees al radiation ul, farthermere, these data are valuable in predicting the exposure ene Bik The Ld. abot: The Dialogic desig a yn ch Iraetheart ate’ ‘ . the cperabiedis Gare OTE: the range at and dogs have all proved te be on s for swine. sheep. gouts, burros, VSO-340 rads. measured in air, with bilateral, fallout-field type exposure The tissue doses are Invieh lower ard these values will be discussed. Temporal variation of radiation seusiiviry afer The pig appears to recover asingty subfethal exposire Varies geeativ fram species tos oecdes. Cu 5. Neotel Dette Etfeets of Fallout Radiation or Man Rou rt A. Coxar:. Brookhaven National Luboracory, Upton, No ¥., 11975. This presentation describes the acute and delaved radiation effects on a buman population 6° Two diferent strains werow Ch vatad Mars TCE experiment plat rich well Gyyisiens occurty a tinnars phase priv to ie nenradiation and thre ‘ tiene The plan inebet: skin irradiation and internal absorption of radionuclides resulted. Nearly complete recovery from sente expos ire Was evident by one vear. In the Marshallese, Inter furdings believed to be related to exrosure were an Tl-vear lag in complete recovery of periphers! blood elements. the occurrence of about duubie the aswal number of miscarriages aud stillbirths auieng the exposed wetben dur the first 4 sears, some residual searing and piginesdt aherr sais a the sites of The The eho atthese, GA bs i ies nt wark teak. a : late sheeiGpeer late poet sisuifesnr mos finding las been the development of thereid abnormalities Cate | am herweor ar) Livers pest expose in Tf Marshallese children aoub i aedta, prescmy: coe resali oficial @xpes ure te internally absorbed radiotodines. ALL de chbiren were exp eed ae COLLECTION “s woe ~~ Marshall saad + Jha —3. Genetic Bffeei. Missin Fo Jovi Sst tory, Oak Hidge (fut lem 5-(34H T. The genetic efiects . II mission Was studied of Neurospora aud the collected on the surfac and or the ground, Pos curves for survival of ©. sive lethal mutatious recessive lethal mutation The recessive lethai nm. . and multilocus deletier: type, “reparabilit ys” aid Present data from the mission indicate that th radiation on cellular ut Mi cen =, at weres . them tte part. living orguiisms using measured quantities of gamma radiation from a known source, “strun- AVL Pernects Sey eters wilh be presoute. The se results wilh be ae Ylu—-1 The Ejfccis of Gamma Radiation Combined with Weightlessness on Biologie Systeme in Hosalctite If. JosernH F. Svcnpeus*, Bioscience Programs, Office of Space Science and Applications, National Aeronautics and Space Administration, Washington, D.C. The effets of combined weightlessness and radiation have been determined on a vametyof REPOSITORY Pre a botnets = corer cmos ar. Jess that 1 vears of age SY of this age group). Based on radiocheraical urine analyses. i was estimated that the ths roid dose in the younger children was 7-1400 rads or about 10 times the estimated adus dose due largely to the smatler size of their theroids. Thyrond surgery in il Cases prevented Teo coses of beniga adenetmatous goiter and Pease of ca rain a 40-.ear otd wentun. Dwe boys with greatest gruwth retardation have developed hypotts roidisin and sume of oche other children show evidence of thyroid hs pofunction. indicating thar impure ie tits org is the Caieative factur in growth retardation. Early indications are that use ef thyroid hormone treatment in the exposed group is having a beneficial effect in reduciug nedules and enhancing growth in the children. Effects of residual fallout contamination on body burdens of radiamichides of the Rongelap people will also be briefly discussed. to study the possibilitytium, contained in Biosatellite If. The objectives of the mission were that the effectiveness of radiation is modified by some other factor in space flight, particularly greatly reduced gravity. As will be demunstrated, such modifications did occur as revealed by the results obtaimed in seven reliable experiments previously studied in Earth laboratones. The seven experimental systems included Tradescantia, commonly knownas the blue flower-— spiderwort, Newospura crassa, larvae and adults of Drosophila melanogaster, Tribolium-con- iy ar pee te tad fo lies Ly Teri. and asheht retardation of growth and development motals in exposed - "Tos -ne vl cecriyls rut eho weretie Te ait. OPS Hematotogicut depression from whole bods irradiation. burns of the sk:0 and epulation from > i boss ' ny drags Li sgeniy bacter:s accidentally exposed to fallout in the Marshall Islands in 1) 44. The 82 people » Roungelap ancl 23 Japanese fishermen received the largest exposure which. however, proved to be sublethal. . fs ee yee! odl PO Moaaresr SES Phe meetin ake te tn Ted sysres padiuserciive. Uae n’bactor~ Sach as TEMLpera ed a detail response to lower dese rates have beey seen und these will be discuss previous “Pent dearas’ Be fine 2 The sheep istarce pattern radigres af garked period s af aud ecuters rapidiyappeurs ely varicbt ly barre Fextrerm dos» extreme sluwest. initial ta bea the fromoun while the ro recover In slower The Medical Re: arch Center akhaven Upton, L. L, ? | L: MOiAory w Yorlt