. Biophysical science. Biophysics. 186 Cellular Events Produced by Ionizing Radiations /10 : I systems manufacturing blood cells; complete destruction of certain tissues: and induction of malignant growths. The entire subject of somatic responses to ionizing radiations is very complex; empirical knowledge extends beyond that which can be explained in terms of the basic cellular events. No attempt is made in this text to describe the details of the responses of complex organisms to ionizing radiation. Rather., in this chapter, the cellular events are emphasized. These in turn can be described i
. Biophysical science. Biophysics. 186 Cellular Events Produced by Ionizing Radiations /10 : I systems manufacturing blood cells; complete destruction of certain tissues: and induction of malignant growths. The entire subject of somatic responses to ionizing radiations is very complex; empirical knowledge extends beyond that which can be explained in terms of the basic cellular events. No attempt is made in this text to describe the details of the responses of complex organisms to ionizing radiation. Rather., in this chapter, the cellular events are emphasized. These in turn can be described in terms of molecular phenomena, the presentation of which comprises Chapter 16. Genetic effects, in contrast to the somatic ones, occur originally in only one cell, even in higher plants and animals. These genetic effects are also discussed in this chapter. Ionizing radiations are destructive to living cells. In most cases, this â - c Q. Distance from Source Figure I. The attenuation of a proton beam passing through tissue. destruction is undesirable to humans. However, in controlled labora- tory experiments, the effect of ionizing radiations can be used to study the organization of the biological cell. In particular, the effects of ionizing radiation are useful for studies of cellular division and of genetics. The use of ionizing radiation as a tool to study biological systems is emphasized in this text. The various types of ionizing rrdiations and related subatomic particles are summarized in Appendix D, for the benefit of those un- familiar with atomic physics. It is sufficient here to note that all these types produce ionization along their path. The heavier ones follow a straight path of definite length; the uniformity' of this path length is illustrated by the graph in Figure 1. The lighter ionizing radiations cannot be described in terms of a definite path length, because the path. Please note that these images are extracted from scanned page images that may have been d
Size: 1241px × 2013px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectbiophysics
