On the following pages we will discuss medical uses of individual radioisotopes—first those used as tracersand then those used for their energy.
In general, tracers are used for analysis and diagnosis, and radiant-energy emitters are used for treatment (therapy).
It should be evident that tracers used in diagnosis—to identify disease or improper body function—are present in such small quantities that they are relatively harmless.
Larkin saw tracers zipping past the nose of the plane.
Square into the oncoming plane the tracers poured.
The tracers showed that my burst was going into his motor.
The black bag was hardly out of the fog bank when tracers from McGee's and Yancey's guns began streaming into it.
The telltale tracers poked their white fingers into the vitals of the Fokker tri-plane.
All our tracers are negative yet, so nothing definite has.
Maximum acceleration, straight for the point where the Hyperion was when her tracers went out," the captain ordered, and through the fringe of that widespread interference he drove a solid beam, reporting concisely to G.
Maximum acceleration, straight for the point where the Hyperion was when her tracers went out," the captain ordered, and through the fringe of that widespread interference he drove a solid beam, reporting concisely to GHQ.
They laid their flak and their tracers on him in a deadly hail of screaming steel.
A half-dozen groves of trees suddenly erupted flame and the sky above the three streaking Nardi's was filled with smoke tracers and exploding steel.
He watched the battle, following the action by the tracers and the bursts of cannonfire.
Radioactive tracers permit measurement of such “biological pathways,” as the biochemist calls them.
But with tracers and other new techniques they have narrowed the experimental time to minutes and finally to seconds.
With radioactive tracers even the smallest insect becomes more easily followed.
With tracers they discovered that many nutrients are readily taken up by foliage, including bark of dormant trees, even at temperatures below freezing.
With tracers the answer may be found in a few days.
Conclusion Radioactive tracers and radiation sources have become indispensable to all phases of agricultural research.
More Tracers in Animal Nutrition Research Female hormones in microgram amounts[1] accelerate fattening of cattle and sheep.
One way to see how valuable radioactive tracers are is to compare them to standard chemical techniques.
The use of radioactive tracersand radiations in research looks especially promising to agriculture.
With tracers it is possible for the first time to measure chemical uptake in single spores and to follow chemicals through the plant.
With tracers it is found that: [Illustration: (A) Fertilizer mixed throughout the soil gives the least benefit to seedlings.
Most of the Governor's guests gasped as the first bright jets of tracers missed the silver sleeve and sailed into the black void above it.
When Hall had risen to leave the terrace, the Governor noticed that his cheek was twitching, but once he was alone in the reception room, away from the sight of the tracers and the target plane, Hall's face grew calm again.
The following day, three more tracers were set up at widely separated points across the planet.
Three tracers will pin-point them, and for a trip across the center of the Galaxy, we will know when and where they'll have to surface.
One more day passed, and more tracers had been set up on Onzar III, across the sun from the capitol planet.
This nontechnical film illustrates the use of radioisotope tracers in biological research and is suitable for intermediate- through college-level audiences.
Labeling RNA with a Radioactive Isotope RNA synthesis is investigated with radioactive tracers in the same way as DNA synthesis.
It was only after World War II, however, when artificially made radioactive isotopes were readily available, that the technique of using isotopic tracers became popular.
He hastily jerked the muzzle in the direction of the coming Huns and ripped off a burst of fire, and at the same moment heard the sharp hiss of their passing bullets, saw the streaking flashes of fire from their tracers flame by.
The tracersfollowed them industriously, and the Archie shells continued to whoop and howl and bump round them as they climbed.
Next moment a coloured light leaped from the Night-Flier, and in return a storm of tracers came streaming and pelting about her.
They tried another, the tracers flaming about them and ripping through their fabrics, the attacked light glaring savagely at them until they swept with a rush and a roar over and past it.
The wavy smoke oftracers whipped and zipped by a few feet over Dave's head.
Their guns hammered and yammered out their song, and Dave could clearly see their tracers zinging down into the German plane.
He saw his gleaming tracers smoke up into the under side of the 88 like so many metal fireflies.
He saw his tracers slice into the plane just in back of the B.
The Messerschmitt did not swerve off, however, even though Dave could see their tracers slapping right into the plane.
In addition to their value in maintaining a record of orders, the tracers and reports are used to advantage in compiling an inventory of work in progress.
His tracers streaked out and seemed to be cutting the Zero's left wing in two, but the Jap craft continued to come boiling in at the big four-engined bomber.
He did throw the two pilots off and caused them to open fire a split second too late so that tracers from their guns cleared the top of the twisting MK-11 by several feet.
Besides following the outline, the operator guides the tracersover all the surface of the pattern within the outlines; otherwise the letter would appear in the matrix in outline only.
Freddy Farmer's guns were already blazing away, but the angle was bad, and the tracers were smoking well above the diving planes.
Straight lines of silver tracerscut down at the two men crouched behind the guard of the U-boat's bow gun.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tracers" in a variety of sentences. We hope that you will now be able to make sentences using this word.
