Radiation doses damage

To demonstrate how to import data from another application into the MATLAB environment, let us assume that the experimental data exist in a file sheet such as Excel. The data represent the yearly incoming surface erythemal solar UV radiation dosage (J per cm ) for a clear sky, after modulation due to average cloud cover, as a function of earth latitude. The data were excerpted from M. Ilyas [Climate augmentation of er5 hemal UV-B radiation dose damage in the tropics and global change, Curr. Sci. 93(11) 1604-1608, 2007]. For simplicity, the file was copied to, or moved into, one of the MATLAB search path directories so that it will appear in the Current Folder Window of MATLAB (Fig. 5.1). 

The chemical properties of the radiation source. When a radioactive nuclide is ingested into the body, its effectiveness in causing damage depends on its residence time. For example, f Kr and gSr are both /3-particle producers. However, since krypton is chemically inert, it passes through the body quickly and does not have much time to do damage. Strontium, being chemically similar to calcium, can collect in bones, where it may cause leukemia and bone cancer. 

Hard X-ray synchrotron radiation experiments on samples containing microbial organisms will almost certainly kill the bacteria and stop whatever metabolic reactions are occurring. Bacteria are more tolerant of soft X-ray energies and may not be killed. Synchrotron infrared radiation do not typically cause damage to bacteria (e.g., Hirschmugl, this volume). 

Tetsuro was born seven months after the bombing. His mother had been scarcely half a mile from the hypocenter. He had been conceived fourteen weeks before the bombing. That placed him, when the bomb fell, in the gestation period when the brain is most vulnerable to radiation-induced damage. He can do simple errands if not pushed, we wrote on his examination records. He was born with an abnormally small head and body size. 

A benefit of the use of accelerometers is that they do not require a calibration program to ensure accuracy. However, they are susceptible to thermal damage. If sufficient heat radiates into the piezoelectric crystal, it can be damaged or destroyed. However, thermal damage is rare since data acquisition time is relatively short (i.e. less than thirty seconds) using temporary mounting techniques. 

Upon absorption of UV radiation from sunlight the bases can proceed through photochemical reactions that can lead to photodamage in the nucleic acids. Photochemical reactions do occur in the bases, with thymidine dimerization being a primary result, but at low rates. The bases are quite stable to photochemical damage, having efficient ways to dissipate the harmful electronic energy, as indicated by their ultrashort excited state lifetimes. It had been known for years that the excited states were short lived, and that fluorescence quantum yields are very low for all bases [4, 81, 82], Femtosecond laser spectroscopy has, in recent years, enabled a much... 

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