Dictionary » R » Radiation



(Science: radiobiology) propagation of energy through space. In the context of this report, it is electromagnetic radiation (x-rays or gamma rays) or corpuscular radiation (alpha particles, electrons, protons, neutrons) capable of producing ionisation. The spread of a group of organisms into new habitats.A radial arrangement of nerve fibers connecting different parts of the brain.(medicine) the treatment of disease (especially cancer) by exposure to radiation from a radioactive substance.Syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours; he was suffering from radiation.The spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay.Electromagnetic energy that travels at the speed of light.

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Newbie question about the first life

... of monomers (simple molecules) that earthly life needs and that electric discharges in the atmosphere (lightning) helped to put together (also UV radiation, radiation issuing from radioactive elements in exposed rocks and shock waves caused by lightning and meteors, but to a much lesser extent). ...

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by piscilactovegetarian
Tue Feb 25, 2014 10:21 am
Forum: Molecular Biology
Topic: Newbie question about the first life
Replies: 14
Views: 10526

Stem Cells

... patient doesn't meet certain requirements for a stem cells transplant. Immune suppression does not come from stem cells treatment, but from using radiation before the transplant in order to remove the "sick" cells and to make room for the healthy ones. Pluripotency in certain stem cells ...

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by Sumanth001
Sun Dec 08, 2013 12:53 pm
Forum: Genetics
Topic: Stem Cells
Replies: 5
Views: 4921

Re: Out of Africa Vs. Multiregional theory

... it's predicated on it. The qualifier is that it started in Africa. Of course as a species from an extant line which probably underwent adaptive radiation, it gets a bit complicated with the other, now extinct, human like species that were our closest living relatives (neaderthals, Denisovans, ...

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by NMLevesque
Fri Nov 22, 2013 6:01 pm
Forum: Evolution
Topic: Out of Africa Vs. Multiregional theory
Replies: 2
Views: 1977

Re: Is complexity inevitable?

... processes. Does quantum indeterminacy allow for mutations to be truly random i.e. indeterminate? I imagine that it could since electromagnetic radiation, which can induce mutations at high wavelengths, is a wave :?:. But I don't know if we're certain of indeterminacy, or if indeterminacy is ...

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by wildfunguy
Fri Oct 18, 2013 1:55 am
Forum: Evolution
Topic: Is complexity inevitable?
Replies: 16
Views: 10692

Why must we avert the genome of Eden?

... ova are produced early during the development of the female fetus, then they are kept on a low energy state, preventing any division, mutation or radiation that could distort the information in the mtDNA. The offspring inherits mtDNA purely from the mother, so it makes perfect sense that such ...

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by Hunor
Mon Sep 23, 2013 12:08 am
Forum: Evolution
Topic: Why must we avert the genome of Eden?
Replies: 6
Views: 8026
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