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Radiation hormesis is the conjecture that a low level of ionizing radiation (i.e., near the level of Earth's natural background radiation) helps "immunize" cells against DNA damage from other causes (such as free radicals or larger doses of ionizing radiation), and decreases the risk of cancer. The theory proposes that such low levels activate ...
Radiolysis of intracellular water by ionizing radiation creates peroxides, which are relatively stable precursors to hydroxyl radicals. 60%–70% of cellular DNA damage is caused by hydroxyl radicals, [3] yet hydroxyl radicals are so reactive that they can only diffuse one or two molecular diameters before reacting with cellular components.
In living organisms, which are composed mostly of water, majority of the damage is caused by the reactive oxygen species, free radicals produced from water. The free radicals attack the biomolecules forming structures within the cells , causing oxidative stress (a cumulative damage which may be significant enough to cause the cell death, or may ...
In some Environmental Protection Agency references, the ionization of a typical water molecule at an energy of 33 eV is referenced [17] as the appropriate biological threshold for ionizing radiation: this value represents the so-called W-value, the colloquial name for the ICRU's mean energy expended in a gas per ion pair formed, [18] which ...
A new Environmental Working Group study says there are contaminants in drinking water that could increase the risk of cancer. New study finds cancer-causing chemicals in tap water Skip to main content
On the one hand, the ionization energy (also called ionization potential, IP), refers to the energy necessary to remove one electron from a molecule; the lowest IP, corresponding to the ejection of a first electron, is the most biologically relevant factor. On the other hand, the photoionization quantum yield Φ, that is the number of electrons ...
Heart disease is the number one cause of premature death in the U.S., according to the CDC.And consuming more than 20% of your total calories from added sugars has been associated with heart ...
Breast cancer is the second most common cancer [(1.4 million cases, 10.9%), but ranks 5th as cause of death (458,000, 6.1%)]. [42] Increased risk of breast cancer is associated with persistently elevated blood levels of estrogen . [ 45 ]
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