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Often fewer aberrations were found after exposure to radiation from both sources than were found after exposure to x-rays alone. At the same fixation times, nonradioactive thymidine did not affect the yield of x-ray-induced aberrations. The same phenomenon occurred at earlier fixation times, after exposure to 30 or 40 rad of x-rays and [\n                    <jats:sup>3<\/jats:sup>\n                    H]thymidine. This response is analogous to the adaptive response to alkylating agents whereby prior treatment with small doses for a long period reduces the damage occurring from large doses of similar agents given for a short time.\n                  <\/jats:p>","DOI":"10.1126\/science.6695170","type":"journal-article","created":{"date-parts":[[2006,10,5]],"date-time":"2006-10-05T15:41:59Z","timestamp":1160062919000},"page":"594-597","source":"Crossref","is-referenced-by-count":672,"title":["Adaptive Response of Human Lymphocytes to Low Concentrations of Radioactive Thymidine"],"prefix":"10.1126","volume":"223","author":[{"given":"Gregorio","family":"Olivieri","sequence":"first","affiliation":[{"name":"Laboratory of Radiobiology and Environmental Health, University of California, San Francisco 94143"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Judy","family":"Bodycote","sequence":"additional","affiliation":[{"name":"Laboratory of Radiobiology and Environmental Health, University of California, San Francisco 94143"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sheldon","family":"Wolff","sequence":"additional","affiliation":[{"name":"Laboratory of Radiobiology and Environmental Health, University of California, San Francisco 94143"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"221","reference":[{"key":"e_1_2_1_1_1","first-page":"195","volume":"51","year":"1964","unstructured":"BELL, S, STUDIES ON MECHANISM OF EFFECT OF FLUORODEOXYURIDINE ON CHROMOSOMES, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 51: 195 (1964).","journal-title":"PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA"},{"key":"e_1_2_1_2_1","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1159\/000129716","volume":"1","year":"1962","unstructured":"Bender, M. 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