Search results
Results From The WOW.Com Content Network
The ratio of these doses is the RBE of R. Instead of death, the endpoint might be the fraction of cells that become unable to undergo mitotic division (or, for bacteria, binary fission ), thus being effectively sterilized — even if they can still carry out other cellular functions.
The oxygen enhancement ratio (OER) or oxygen enhancement effect in radiobiology refers to the enhancement of therapeutic or detrimental effect of ionizing radiation due to the presence of oxygen. This so-called oxygen effect [ 1 ] is most notable when cells are exposed to an ionizing radiation dose .
This figure illustrates the typical change in the relative radiosensitivity for a biological effect such as cell death when exposed to radiations of low ionizing density (e.g. x-rays). The hyperbolic relationship shown has a maximum OER of 2.70 for 100% oxygen (at 760 mmHg), with a half-range OER value at 4.2 mmHg or 0.55% of oxygen.
The rem and millirem are CGS units in widest use among the U.S. public, industry, and government. [4] However, the SI unit the sievert (Sv) is the normal unit outside the United States, and is increasingly encountered within the US in academic, scientific, and engineering environments, and have now virtually replaced the rem. [5]
A directorial republic is a government system with power divided among a college of several people who jointly exercise the powers of a head of state and/or a head of government. Merchant republic: In the early Renaissance, a number of small, wealthy, trade-based city-states embraced republican ideals, notably across Italy and the Baltic.
The roentgen or röntgen (/ ˈ r ɛ n t ɡ ə n,-dʒ ə n, ˈ r ʌ n t-/; [2] symbol R) is a legacy unit of measurement for the exposure of X-rays and gamma rays, and is defined as the electric charge freed by such radiation in a specified volume of air divided by the mass of that air (statcoulomb per kilogram).
The book cover of Rael's book Geniocracy: Government of the People, for the People, by the Geniuses (Printed for the first time in English: 2008 Nova Distribution.). The term geniocracy comes from the word genius, and describes a system that is designed to select for intelligence and compassion as the primary factors for governance.
There are some options in weighing risks for some claims, below are the summary as it might be likely to be implemented. NOTE: For some "unrated" risk weights, banks are encouraged to use their own internal-ratings system based on Foundation IRB and Advanced IRB in Internal-Ratings Based approach with a set of formulae provided by the Basel-II accord.