To illustrate how radioisotopes can be used to solve a practical problem, we have chosen a typical example, the investigation, at a molecular level, of the effectiveness of an anti-cancer drug.
Radioisotopes and Life Processes The Understanding the Atom Series Nuclear energy is playing a vital role in the life of every man, woman, and child in the United States today.
This technical film discusses the advantages of tritium over other radioisotopes as labeling material in autoradiography.
The biochemical, autoradiographic, and counting techniques that we described previously are all used to determine the uptake of the radioisotopes into the cell’s components.
We have now learned how to use radioisotopes to investigate the synthesis of RNA, the molecule that translates the DNA message into the language of proteins.
Atomic energy, nuclear reactors, and radioisotopes are terms in everyday usage.
This nontechnical film demonstrates some of the uses of radioisotopes in the study of cell division and in medical therapy.
However, to appreciate how radioisotopes can be applied to the study of life processes, we must have at least a working knowledge of their properties, their preparation, and their limitations.
Liquid Scintillation Counting Liquid scintillation counting is the preferred method for the measurement of low-energy beta-emitting radioisotopes commonly used in cell-fractionation studies (see Figure 18).
Radioisotopes are isotopes that are unstable, or radioactive, and give off radiation spontaneously.
Radioisotopes serve as concentrated sources of radiation and frequently are localized within the diseased cells or organs.
Radioisotopes in Medicine The Understanding the Atom Series Nuclear energy is playing a vital role in the life of every man, woman, and child in the United States today.
This radiochemical had been structured so that, if there were a tumor in his cranium, the radioisotopes would be attracted to it.
One of the results of all this is that every month new uses of radioisotopes are developed.
This method is one of many ways doctors use radioisotopes to combat disease.
His case is an example of how radioisotopes are used in hospitals and medical centers for diagnosis.
Other investigations of fallout or of radioisotopes introduced deliberately into controlled field plots may require years of patient observation in small and circumscribed areas.
Illustration: Distribution of fallout radioisotopes on Rongelap Atoll as determined by a survey in 1961.
Oak Ridge scientists began to try to find out whether the pipe-organ wasps actually were discriminating against muds containing all or some of these radioisotopes or against the ionizing radiation from them.
Among the few broad estuarial studies yet undertaken is one started in 1961 to plot the dissemination in the lower Columbia River, and in the Pacific Ocean, of radioisotopes transported by the river from the Hanford plant.
The practicing physician also, after receiving special training and licensing, may use radiation and radioisotopes as another tool in his little black bag.
Like fireflies which reveal themselves at dusk by flashes of light, radioisotopesannounce their numbers and locations to sensitive Geiger tubes by flashes of invisible “light.
Suggested References Applications ofRadioisotopes and Radiation in the Life Sciences.
Radioisotopes as Radiation Sources Earlier in this booklet radioisotopes were compared to fireflies because they emit flashes of “light.
Tagging the pests with radioisotopes in order to identify the predators which consume them is much simpler because the most efficient predators contain the most activity.
The elements labeled β yield radioisotopes that emit few or no gamma rays and can only be analyzed by neutron activation using appropriate chemical separation procedures followed by beta radioactivity measurements.
This will give you a match (or mismatch) for elements that yield radioisotopes of fairly short half-life such as manganese (2.
See Radioisotopesin Medicine, another booklet in this series, for a full discussion of medical treatment with radioactive materials.
They are designed so the radioisotopes they contain have similar distribution to the distribution of the isotopes expected in the real body.
Minerals That Can Be Dated Measuring age by one of the long-lived radioisotopes requires a closed system.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "radioisotopes" in a variety of sentences. We hope that you will now be able to make sentences using this word.
