182 METABOLIC STUDIES WITH STRONTTUM-90 THE SHORTER-TERM BIOLOGICAL HAZARDS OF A FALLOUT FIELD 14. R. 8. Scone and J, G. Hamrton, Private Commu- 29. Sunurvan, Dourt, and DuBors, “Metabolism and ‘“Strontiam® Metaboliem in Man and Effect of versity of Chicago Toxicity Lab Quarterly Prog. Report TID 365, Jan. 1950, nication [data tubulated by ]udiey?]. 6. Spencer, Broruers, Bercer, Harr, and Lasano, Toxicity of Radioactive Materials. YII. Strontium-89, Tantalum-182 and Yétrium-91," Uni- * Caleium on Strontium Excretion,” Pree, Soc. Fpl, Biol, Med. 91, 155-157 (1956). . Cowan, Faraper, and Love, “Health Physics 30. M. P. Finxer, “The Transmission of Radiostron- tion Incident.” Am. J. Roentgenol. Radium Therapy Nuclear Med, 67, 805~891 (1952), 405-421 (1947). 31. L. Erp and ©. Peonun, “Secretion of Radiostron- = a tium and Plitonium from Mother to Offspring in Laboratory Animals," Physiol. Zool. 20, and Medical Aspects of a Strontium"? Inhala- 17. 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Radiol., Supp. No. 6, 1955. Appendix I.- Standard monkeydiet Hera Source Fruit and vegetables: Apple. .---2---..0- =. Daity ration » 4 Orange... Banana. Carrot... : Peanute.- 22-222 22--Chim Biseuits-—-2 o2.... Kennel Pood Whole milk, reconstituted powdered. Conn. Golden State Co. I pt Dietene Co., 134 tbsp > Dietary supplements added to milk: “Meritene” —protein supplement Supply Co., Fairfield, Minneapolis, Minn. M4 ¥ 3 med. 1 doz 2 “Vi-mix Drops’--Vit. Lilly_.---..--. 0.5 ce® “Zymatinic Drops"--Vit. B complex, iron, Upjohn....-.. 0.5 ec ® A, B complex, D liver . * Average amounts for 2- to 5-kg monkey, adjusted upwardfor larger animals, ’ One-half human adult minimum daily protein requirement * Anproximately equal to human[nfant minimum daily requirement. Appendix II.—Infant monkey diet Tem. Souree Daily ration Local... 8 to 9 oz* ..-.do.... 20¢ “Vi-daylin” (Multivitamin Abbott.... 1 ec > “Feosal” (Fe8Qi) ....-. Squibb... 1 ee® Formula: Whole cow's milk (16 02), Buctose (3 tbsp) Fresh fruit: (orange, apple, banana) Dictary supplements: mixture) * Formula constitution givenfor infants 2 months of age and older- A more ditute formulaIs useil for the first 2 months, + Approximately one-balf humaninfant minimumdaily requirement. Patricia W. Durbin Dr. Lanaiam. I would like to ask, did I understand that you were or wore notsatisfied with whole body counting of Bremsstrahlung as a means of measuring strontium 90 iu these animals? Dr. Durriw. I think whole body Brems- strahlung counting is a splendid idea, and [am sure that we would be much moresatisfied with it if the equipment that we had to work with were a little bit more accurate and certainly a good deal more sensitive. 183 time our lower limit is a tenth of a microcurie DISCUSSION At the present in an animal that weighs about a pound and a half. I am sure with a liquid scintillator or larger crystals we could do a great deal better than that. Dr. Lanauam. With the larger crystal you could. With the liquid scintillator, you could not get anything probably to amount to much, because it has about a 300-kilovolt cutoff in energy sensitivily, The bigger crystal might. The reason 1 was asking this, is that this is heing proposed as a means of determining the strontium burden in the chronic dog experiments being planned iu Davis, Calif.