radioactivity

If the molecules to be separated contain radioactivity, for example in DNA sequencing gel, an autoradiogram can be recorded of the gel.

However, some granites have been reported to have higher radioactivity thereby raising some concerns about their safety.

Iodine-123 may be the preferred radionuclide in some clinics due to its more favourable radiation dosimetry ( i. e. less radiation dose to the patient per unit administered radioactivity ) and a gamma photon energy more amenable to imaging with the gamma camera.

The patient returns 24 hours later to have the level of radioiodine " uptake " ( absorbed by the thyroid gland ) measured by a device with a metal bar placed against the neck, which measures the radioactivity emitting from the thyroid.

* 1896 Antoine Henri Becquerel discovers natural radioactivity ; Minck proposes the therapeutic use

National and international regulations on the levels and types of energy used to irradiate food generally set standards that prevent the possibility of inducing radioactivity in treated foods, and, hence, excluding the risk to workers and the environment.

Most of the water in Kazakhstan is polluted by industrial effluents, pesticide and fertilizer residue, and, in some places, radioactivity.

* Lambda indicates the radioactivity decay constant in nuclear physics and radioactivity.

More specific tests for minerals include reaction to acid, magnetism, taste or smell, and radioactivity.

* 1896 – Henri Becquerel discovers radioactivity.

The history of nuclear physics as a discipline distinct from atomic physics starts with the discovery of radioactivity by Henri Becquerel in 1896, while investigating phosphorescence in uranium salts.

While the work on radioactivity by Becquerel and Marie Curie predates this, an explanation of the source of the energy of radioactivity would have to wait for the discovery that the nucleus itself was composed of smaller constituents, the nucleons.

It is very hard to uniquely identify neutrino interactions among the natural background of radioactivity.

This observation led to the use of induced radioactivity for the identification of elements.

Helium is not subject to steam explosions, resists neutron absorption leading to radioactivity, and does not dissolve contaminants that can become radioactive.

This would reduce the incidence of fire, and thus the likelihood of Nuclear Winter, with the trade off that radioactivity would increase in the larger amounts of dust lofted in local Fallout by these low altitude detonation heights.

File: Portrait of Antoine-Henri Becquerel. jpg | Henri Becquerel ( 1852 – 1908 ): discovered radioactivity along with Marie Skłodowska-Curie and Pierre Curie, for which all three won the 1903 Nobel Prize in Physics.

File: Marie Curie c1920. png | Marie Curie ( 1867-1934 ): discovered radioactivity with Henri Becquerel and her husband Pierre Curie, awarded Nobel Prize in Physics ( 1903 ) and the Nobel Prize for Chemistry ( 1911 ), found techniques for isolating radioactive isotopes, isolated plutonium and radium

File: Lise Meitner ( 1878-1968 ), lecturing at Catholic University, Washington, D. C., 1946. jpg | Lise Meitner ( 1878-1968 )-worked on radioactivity and nuclear physics, discovered radioactive element protactinium with her colleague Otto Hahn, part of the team that discovered nuclear fission, for which Otto Hahn was awarded the Nobel Prize.

File: Enrico Fermi 1943-49. jpg | Enrico Fermi ( 1901-1954 ): developed first nuclear reactor ( Chicago Pile-1 ), contributed to quantum theory, nuclear and particle physics, and statistical mechanics, awarded the 1938 Nobel Prize in Physics for his work on induced radioactivity.

Because of the scarcity, high radioactivity and high toxicity, there are currently no uses for protactinium outside of scientific research, and for this purpose, protactinium is mostly extracted from spent nuclear fuel.

# PET scan of the human brain. Neurology: PET neuroimaging is based on an assumption that areas of high radioactivity are associated with brain activity.

The toll on the worst-affected populations and the growth since then in understanding about the critical threat to human health posed by radioactivity has also been a prohibitive complication associated with nuclear power.