This paper evaluates the scientific basis for adoption of linear non-threshold (LNT) dose response model radiation-induced leukemia. LNT risk assessment application leukemia is significant because it: (1) was generalized all tumor types induced by ionizing radiation and chemical carcinogens at relatively high doses and; (2) it based on mechanistic assumption low linearity somatic cell mutations...

For ionization radiation (IR) induced cancer, a linear non-threshold (LNT) model at very low doses is the default used by a number of national and international organizations and in regulatory law. This default denies any positive benefit from any level of exposure. However, experimental observations and theoretical biology have found that both linear and J-shaped IR dose-response curves can ex...

Computed tomography (CT) is a prominent procedure in the US with larger radiation doses than traditional radiology. CT is a powerful tool in the diagnosis of a wide variety of conditions and its use has grown quickly because of its power. CT contributes a significant portion of annual per capita dose in the US. The risk of this additional dose is poorly understood. The risks of low doses of rad...

There is strong evidence that ionizing radiation increases cancer risks at high doses (e.g., >1 Gy), and persuasive, if controversial, epidemiological evidence that cancer risks are increased at low doses ( 10 mGy). Discussed here are the issues related to extrapolating radiation risks from low radiation doses to very low doses (<1 mGy) — for which purpose we are forced to rely on radiobiologic...

Low nocturnal temperature (LNT) is a major constraint for protected tomato production in China during winter and spring, which leads to phosphorus (P) deficiency symptoms. The soil P fractions reflect availability. foliar root the adaptation strategies of tomatoes LNT. However, relationship between plant under LNT not well understood. Therefore, we conducted 40-day indoor incubation experiment ...

There is strong evidence that ionizing radiation increases cancer risks at high doses (e.g., >or=1 Gy), and persuasive, if controversial, epidemiological evidence that cancer risks are increased at low doses ( approximately 10 mGy). Discussed here are the issues related to extrapolating radiation risks from low radiation doses to very low doses (<or=1 mGy) - for which purpose we are forced to r...