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Author Biggers, J. D. ♦ Gwatkin, R. B. L.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword BIOLOGY AND MEDICINE ♦ ANIMAL CELLS ♦ BIRDS ♦ BONE MARROW ♦ CHICKENS ♦ EMBRYOS ♦ ERYTHROCYTES ♦ IRRADIATION ♦ LEUCOCYTES ♦ LIVER ♦ MEDICINE ♦ METABOLISM ♦ MITOSIS ♦ MUSCLES ♦ NUMERICALS ♦ PERFORMANCE ♦ QUANTITATIVE ANALYSIS ♦ RADIATION DOSES ♦ RADIATION EFFECTS ♦ RADIATION INJURIES ♦ RADIOTOXINS ♦ RATS ♦ REGENERATION ♦ STANDARDS ♦ STATISTICS ♦ SURGERY ♦ SUSPENSIONS ♦ TESTING ♦ TISSUES ♦ TOXICITY ♦ VARIATIONS ♦ WEIGHT ♦ X RADIATION
Abstract Rudiments of long-bones from embryonlc chicks were exposed to doses of 0, 102, 256, 6401, 1600, and 4000 r and then studied. The results suggest that the length, wet weight, and dry weight are depressed in rudiments exposed to more than 256 r. However, statistical analyses indicate that only the effects produced by doses greater than 640 r are significant. The data also show that the rudiments exposed to 4000 r increased in length by 119%. Also, exposure to 4000 r depressed the wet and dry weights after 6 days cultivation 49.5 and 55.8% of the non-irradiated rudiments, respectively, whereas the length was only depressed by 24.9%. From the results, it was concluded that cell division and hypertrophy in the tibiotarsus are independent processes. (P.C.H.)
Educational Use Research
Learning Resource Type Article
Publisher Date 1964-04-11
Publisher Department Univ. of Pennsylvania, Philadelphia
Journal Nature
Volume Number 202
Organization Univ. of Pennsylvania, Philadelphia


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