Word: tumors
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Dates: during 1970-1979
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...experiment that is causing great concern and is restricted to quite special facilities: the so-called "shotgun" experiment with random fragments of DNA from animal cells. Two considerations seem pertinent. First, the probability that any fragment will contain a gene for a toxic product, or the genes of a tumor virus, is exceedingly low, though not zero. Second, evolutionary considerations provide an independent approach to the question. It seems exceedingly doubtful that our novel ability to introduce mammalian DNA into bacteria in the laboratory will create a truly novel class of organisms, for evolution has already had a crack...
...accept uncritically the studies and test data provided by the pesticide producers themselves-and for its failure, in many cases, to consider adverse reports and warnings from experts. The EPA, for example, ignored a report in its own files showing that the pesticide 2,4-D caused "increased tumor formation" in rats; as recently as April 1976 it approved what many experts believe to be unacceptably high tolerance levels of the chemical in food products. The agency was also blasted for dragging its feet on aldrin, dieldrin and heptachlor. An EPA review revealed as early as 1971 that there were...
Billiard Game. Betty S. has an inoperable malignant tumor of the esophagus. She is one of two dozen patients participating in a promising new program for fighting advanced cancer of the mouth, upper respiratory system, cervix, brain, pancreas and other areas that until recently have been virtually untreatable. Fermilab's weapon is a beam of high-energy neutrons produced by its linear accelerator. Directed against certain tumors, the neutrons can be more effective than the X rays normally used in cancer therapy. Their advantage lies in the combination of their mass (they are heavy by subatomic standards) and high...
Following the British lead, Houston's M.D. Anderson Hospital and Tumor Institute, the U.S. Naval Research Lab, and the University of Washington in Seattle have all started using neutron irradiation. But Fermilab has a special advantage: it delivers neutrons at higher energies and thus can probe deeper into the tumors...
...inactivated, the body will not produce blood vessels to nourish the tumor, and without the vessels, the tumor can do no damage, according to an article by Folkman in the May issue of Scientific American...