Ultraviolet radiation is a well established epidemiologic risk factor for malignant melanoma. This observation has been linked to the relative resistance of normal melanocytes to ultraviolet B (UVB) radiation-induced apoptosis, which consequently leads to accumulation of UVB radiation-induced DNA lesions in melanocytes. Therefore, identification of physiologic factors regulating UVB radiation-i...

X-rays or computed tomography (CT) scans are performed frequently in the hospital for health examination or treatment purposes. Medical radiation involves applying radiation such as X-rays, gamma-rays, or beta rays, injecting radioactive isotopes into the body, or administering them orally to take imaging studies or treat diseases such as cancer. When the human body is exposed to radiation, cel...

In the paper first the harmful effects of electromagnetic radiation to human beings are pointed out. The sources of electromagnetic energy encountered in occupational and general public environment are revealed and the thermal and nonthermal influences of their electromagnetic fields are briefly discussed. A survey of exposure limits adopted in different national and international standards and...

This research presents an experimental study of the effect UV-B radiation (7.5 Wm−2) on change total concentration chlorophyll ΔChl and energy that a plant can store during process photosynthesis. The aim was to investigate spectral lines five genetically different corn hybrids find with better resistance. Chlorophyll fluorescence from leaves used as method. plants were exposed for 19 days. fol...

Ionizing radiation is extremely harmful for human cells, and DNA double-strand breaks (DSBs) are considered to be the main cytotoxic lesions induced. Improper processing of DSBs contributes to tumorigenesis, and mutations in DSB response genes underlie several inherited disorders characterized by cancer predisposition. Here, we performed a comprehensive screen for genes that protect animal cell...

tissues. Because of these facts and ethical issues, it is impossible to study the effect of radiation on human health. Most human studies related to radiation exposure were based on several historical event in the 21 century such as the atomic bombings of Hiroshima and Nagasaki in World War II and the Chernobyl disaster. From these events, although exact doses are unknown, most people believe t...