In this capacity the isotope may be likened to a dynamic and revolutionary type of “atomic microscope”, which can actually be incorporated into a living process or a specific cell.
Labeling RNA with a Radioactive Isotope RNA synthesis is investigated with radioactive tracers in the same way as DNA synthesis.
Labeling DNA with a Radioactive Isotope Of the four bases in DNA, three are also found in the other nucleic acid, RNA; but the fourth, thymine, is found only in DNA.
Labeling an Amino Acid with a Radioactive Isotope Suppose we have the amino acid leucine labeled with ¹⁴C and we inject a solution containing it into an experimental animal.
Because that's the only naturally occurring isotopeof gold.
Why nail the "power metal" down to an isotope of gold with an atomic weight of 197?
One radioactive isotope in the fallout, iodine-131, rapidly built up to serious concentration in the thyroid glands of the victims, particularly young Rongelapese children.
Thus the half-life of thisisotope is 14 billion years.
Measuring this process is perfectly suitable from the point of view of half-life, but the daughter product is identical with the most common isotope of ordinary calcium.
There are many ways of determining this chemically, or we can use a sample isotope of known composition obtained from the U.
The figure shows patterns from mass spectrometer charts; each peak represents an isotope of strontium, and the height of every peak is proportional to the relative abundance of that isotope.
Each beam contains one isotope of the original material, because isotopes differ on the basis of their mass.
This may sound simple, but in reality the measurement process is a formidable undertaking, because the amount of the ¹⁴C isotope in the carbon is so extremely small.
This is because this isotope is radiogenic and has been accumulating from the decay of rubidium since this crystal was formed.
The absolute accuracy in measuring strontium isotope abundance is a few tenths of 1%, using the best mass spectrometers now available.
The half-life of the radioactive isotope produced.
An isotope is just a different variety of the ordinary kind of atom in each element.
Well, heavy water is made of one atom of oxygen plus two atoms of deuterium, which is the first isotope of hydrogen.
Merely adding neutrons would not be enough; that would make only a heavier isotope of the already known heaviest elements, uranium.
This isotope has almost twice the mass of the lighter one.
The integer closest to the mass of the individual isotope is spoken of as the “mass number” of that isotope.
A radioactive isotope of strontium produced by certain nuclear reactions, and constituting one of the prominent harmful components of radioactive fallout from nuclear explosions; also called radiostrontium.
That's because we're getting only a single isotope of the original light.
But one isotope is diverted through the walls of the bubble into the Time Theater.
In that way the nucleus, absorbing 1 neutron and emitting 2, would become a lighter isotope of the same element.
Sometimes the more massive isotope that is formed through neutron absorption is stable, as hydrogen-2 is.
Bohr pointed out that there were theoretical reasons for supposing that it was the uranium-235 isotope (making up only 0.
The technetium isotopethat was formed was radioactive.
There are over 100 isotopes that will absorb neutrons and end by becoming an isotope of an element one higher in the atomic number scale.
In fact, neptunium-239 also emitted a beta particle so it ought to become an isotope of an element even higher in the atomic number scale.
It was rather disappointing that it was uranium-235 which underwent fission, because that isotope made up only 0.
Another isotope capable of fissioning under neutron bombardment is uranium-233.
Since the neutron has a mass number of 1 and an atomic number of 0 (because it is uncharged), a nucleus that absorbs a neutron remains an isotope of the same element, but increases its mass number.
The superscript m after this isotope indicates an excited state of the atom.
Since thisisotope emits gamma rays, measurement is done using counters on the outside of the body, placed at appropriate locations above the different sections of the heart.
We shall see that the half-life is one factor considered in choosing a particular isotope for certain uses.
This general procedure of extracting a short-lived isotope from its parent is also used in other cases.
This new, mild isotope can be mixed with other elements and these become the day’s supply of radioisotopes for other scans.
The intensity of the light varied with the counting rate and thus diseased tissues that differed little from normal tissue except in their uptake of an isotope could be discerned.
When gamma rays emitted by a tracerisotope in the patient’s body struck the scanner, a flashing light produced a dot on photographic film.
The total body water can then be computed by the general isotope dilution formula used for measuring blood plasma volume.
Were the nuclei single particles—a different one for every isotope of every element?
The only isotope of phosphorus that occurs in nature, however, is phosphorus-31.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "isotope" in a variety of sentences. We hope that you will now be able to make sentences using this word.
