RADIATION, ITS PRIMARY INTERACTIONS

1960 ◽  
Vol 38 (3) ◽  
pp. 312-320 ◽  
Author(s):  
G. F. Whitmore

A discussion is presented of some current thinking on the primary interactions of ionizing radiation with biological materials, including a brief discussion of ionization, excitation, the track phenomenon of charged particles, and the radiation chemistry of water. An attempt is made to correlate some of these phenomena with the variations in biological damage produced by various types of radiations incident on various biological systems and under varying conditions of oxygen tension.

1960 ◽  
Vol 38 (1) ◽  
pp. 312-320 ◽  
Author(s):  
G. F. Whitmore

A discussion is presented of some current thinking on the primary interactions of ionizing radiation with biological materials, including a brief discussion of ionization, excitation, the track phenomenon of charged particles, and the radiation chemistry of water. An attempt is made to correlate some of these phenomena with the variations in biological damage produced by various types of radiations incident on various biological systems and under varying conditions of oxygen tension.


Author(s):  
D A Waters

Echolocation systems used by bats may be used by engineers wishing to emulate the performance of these biological systems. Comparisons are made between biosonar systems based on water and air, the signal structures used by animals echolocating in air, and the limits on resolution. The current thinking in how biological systems operate are discussed, as are the engineering challenges of replicating the performance levels demonstrated by echolocating animals.


1961 ◽  
Vol 15 (6) ◽  
pp. 754 ◽  
Author(s):  
J. F. Spalding ◽  
T. T. Trujillo ◽  
W. L. LeStourgeon

Antioxidants ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 49
Author(s):  
Bimal Prasad Jit ◽  
Biswajita Pradhan ◽  
Rutumbara Dash ◽  
Prajna Paramita Bhuyan ◽  
Chhandashree Behera ◽  
...  

Ionizing radiation results in extensive damage to biological systems. The massive amount of ionizing radiation from nuclear accidents, radiation therapy (RT), space exploration, and the nuclear battlefield leads to damage to biological systems. Radiation injuries, such as inflammation, fibrosis, and atrophy, are characterized by genomic instability, apoptosis, necrosis, and oncogenic transformation, mediated by the activation or inhibition of specific signaling pathways. Exposure of tumors or normal cells to different doses of ionizing radiation could lead to the generation of free radical species, which can release signal mediators and lead to harmful effects. Although previous FDA-approved agents effectively mitigate radiation-associated toxicities, their use is limited due to their high cellular toxicities. Preclinical and clinical findings reveal that phytochemicals derived from plants that exhibit potent antioxidant activities efficiently target several signaling pathways. This review examined the prospective roles played by some phytochemicals in altering signal pathways associated with radiation response.


Sign in / Sign up

Export Citation Format

Share Document