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About Medford mail tribune. (Medford, Or.) 1909-1989 | View Entire Issue (May 19, 1960)
o o o o o ) o o n o CDCTT.3 O Chemical Technique Lessens Dangers of Atomic Fall-outs BY DELOS SMITH UPI Science Eedilor New York -d'PD- Two scien tists capitalized on the fact that human bone absorbs radio-active strontium to create a c h e m i c a 1 technique which can make that dangerous ele ment in atom ic ( a 11 - o u t much less dangerous for people. aFif4 .a Radioactive ueios &mun sironiium - yu is dangerous because it is brought down from the stra tosphere by rain. That puts it into vegetation and thence in to cows and then into their milk. When people drink the milk their bones absorb greedily any radioactive strontium which is in it, along with calcium and other bene ficial minerals. It occurred to Lean Singer and W. D. Armstrong of the University of Minnesota that this potential evil could be converted into potential good. Why not take advantage of this affinity of bone for stron tium by using bone outside the body as a filter? With pulverized bone, they made filters. They added pre cisely measured amounts of radioactive strontium to milk and poured the milk through the filters, and up to 75 per cent of the strontium was fil tered out of it. But, of course, it wasn't as simple as that makes it sound. You see, the bone chemis try which causes bone to ab sorb strontium whether or not it is radioactive also causes it to absorb other min erals which are among the constituents that make milk such as wonderfully nutrition al food. The problem, then, was to ! Theyll Do It Every Time . By Jimmy ILitlo I I DIDHT "TWEN HOWCUM THERE'S ENOUGH HAVE TIME TO I GARBAGE TO START A NEW GET A BIS t CITY DUMP ? MEAL READVj f uiTtwr. DEAR-WERE JUST) J ,"i"fr-J. Y p,nrr X PEAS V NOTPEALiyi ' 2SIHI- 2'E PUT OUT t.J .tyC I hungry-" J a Jlu some op rr h4 make bone filters which erais out of it. This problem I ized bne through chemical would extract strontium from treatments. milk without taking equal I ou-her u mu.-, The idea was to make bone amounts of these other min-ld by putting their pulver-1 iCSs an organic substance and Section C Pages M2 MedfordWtribune MEDFORD, OREGON, THURSDAY, MAY 19, 1960 more a purely mineral one. They made "anorganic" bone by extracting the proteins, and "fat-free'' bone by wash ing out the fats. The former as a filter took out 97 per cent of the stron tium whiie removing only a little calcium and potassium. The latter took out 75 per cent of the strontium but removed aooui one-mirn ot me calcium. The scientists said this de-1 ficiency of the best filter bone j could be repaired by adding ! calcium to filtered milk. I Their filters were column shaped. By making the col umns longer, even more radio active strontium should come out, they said. A filtering col umn could be used indefinite ly because - as they demon strated experimentally - the radioactive strontium accum ulated in the filter after one usage can be removed chemi cally before the filler is used again. Radioactive strontium and its sister isotope from fallout, radio active cesium, can be found in milk in most of the northern hemisphere, but in amounts much below those which scientists consider to be menancing. If there is any increase in fall-out, however, these amounts would increase. Various efforts have been made to develop filtering techniques. Previous ones have involved the use of syn thetic resins. This would make filtering milk in quantity dif ficult. And these methods change the taste. Singer and Armstrong reported that a "taste panel" couldn't distin guish their filtered milk from unfiltercd milk. St. Onge DEMOCRATIC Convention Delegate Pd. Pot. Adv. Si. Gnse. Comm. 12110 Knoihill Drive. 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