The Basic Aspects of Radiation Effects on Living SystemsJames J. Nickson |
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Page 202
... oxygen ( 56 ) . Five times as many roentgens are necessary to produce an equivalent killing effect when irradiation of bacteria is done in the absence of oxygen than when oxygen is present ( 104 ) . Cells forming the margins of ...
... oxygen ( 56 ) . Five times as many roentgens are necessary to produce an equivalent killing effect when irradiation of bacteria is done in the absence of oxygen than when oxygen is present ( 104 ) . Cells forming the margins of ...
Page 271
... oxygen . Another and perhaps more likely possibility appeared to be that the effect of oxygen itself is an indirect one , such that in the presence of dissolved oxygen x - rays produce in cells a certain substance or substances which ...
... oxygen . Another and perhaps more likely possibility appeared to be that the effect of oxygen itself is an indirect one , such that in the presence of dissolved oxygen x - rays produce in cells a certain substance or substances which ...
Page 273
... oxygen diffuses very rapidly into the cells and is present during the recovery process . This is shown by the fact that the introduction of oxygen during irradiation causes a TABLE 2 EXPERIMENTS ON THE INTRODUCTION OF OXYGEN DURING X ...
... oxygen diffuses very rapidly into the cells and is present during the recovery process . This is shown by the fact that the introduction of oxygen during irradiation causes a TABLE 2 EXPERIMENTS ON THE INTRODUCTION OF OXYGEN DURING X ...
Contents
THE PHYSICAL PROC | 1 |
AVERAGE ENERGY LOSS | 13 |
BEAMS OF HIGHENERGY PARTICLES | 25 |
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aberrations absorption action activity alpha particles alpha rays atoms beam Biol biological effects bond calculated capture catalase cell division cellular cent changes chemical chromosome collisions cysteine decrease density desoxyribonucleic acid diffusion diploid discussed dosage dose dose-effect Drosophila effects of radiation electrons energy loss energy transfer enzymes excitation experimental experiments exposure factor formation fraction frequency gamma rays gene mutations genetic groups haploid high-energy hydrogen important inactivation increase inhibition involved ion pairs ionization potential ionizing particles ionizing radiations irradiation lethal mechanism medium metabolic mice mitosis molecular molecules Muller mutation rate neutron nuclear nucleic acid nucleus observed obtained occur organic oxidation oxygen peroxide phage Phys possible present probability Proc produced protein protons radiation chemistry radiation effects radicals radioactive radiobiological radiobiology range reactions recoil relative roentgen sensitive solution specific stopping power survival curves target theory temperature tion tissue Tradescantia ultraviolet values velocity x-rays yeast