. Cellular basis and aetiology of late somatic effects of ionization radiation. Radiation -- Physiological effect. Fig. 1. Blackening ol pliutographic paper by an eleetroii beam generated by a van de Graaff generator under the conditions used for experiments in mice (A) and rats (B, C). The beam enters from the top of the picture through a saddle-hke lead shield and penetrates a •o cm number of sheets of photographic paper clamped together (on left). The circular field is in diameter and well-defined at the periphery. The radiation falls off sharply between the 9th and 10th sheets of paper. On
. Cellular basis and aetiology of late somatic effects of ionization radiation. Radiation -- Physiological effect. Fig. 1. Blackening ol pliutographic paper by an eleetroii beam generated by a van de Graaff generator under the conditions used for experiments in mice (A) and rats (B, C). The beam enters from the top of the picture through a saddle-hke lead shield and penetrates a •o cm number of sheets of photographic paper clamped together (on left). The circular field is in diameter and well-defined at the periphery. The radiation falls off sharply between the 9th and 10th sheets of paper. On the right a single sheet of photographic paper was exposed in a slot of a wax phantom at right angles to the beam under similar conditions: (A) over a field of 1 cm diameter to a beam of 0-7 MeV, (B) and (C) over a field of 2-5 cm diameter to a beam at 1-0 MeV. In (C) the upper edge of the paper is shaped to simulate the dorsal contour of a rat. (Courtesy of Dr. J. W. Boag.). Fig. 2. Section through a lesion in the'dorsal skin of a C57BL mouse exposed over a 1 cm field to a dose of rads given', in 30 seconds at 0-7 MeV. 419 days before fixation. The hyalinized central part of the lesion is seen on the right (cf. Fig. 3). Subepidermal blistering extends peripherally over a dermal region in which the elastic fibres () appear as distinct clumps, and coincides in position with the blood vessels (v) above the panniculus carnosus (). Weigert's Elastica. X Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harris, R. J. C. (Robert John Cecil), 1922-; Unesco; International Atomic Energy Agency. London, New York, Academic Press
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