What's the difference between racer and tracer?

Racer


Definition:

  • (n.) One who, or that which, races, or contends in a race; esp., a race horse.
  • (n.) The common American black snake.
  • (n.) One of the circular iron or steel rails on which the chassis of a heavy gun is turned.

Example Sentences:

  • (1) White Carneau (WC) pigeons are susceptible to the development of aortic atherosclerosis, whereas Show Racer (SR) pigeons are resistant, even though there are no differences in the known risk factors, including plasma cholesterol levels, lipoproteins, blood pressure, etc.
  • (2) A ski racer landing in a bent position on flat ground after a jump documented on video tape felt a sharp pain and immediate instability, though he did not fall.
  • (3) Biosynthesis of PGE2 from [1-14C]arachidonic acid was investigated in the aorta of spontaneously atherosclerosis-susceptible White Carneau pigeons and was compared with that of the atherosclerosis-resistant Show Racer breed.
  • (4) I wish the rest of the racers good luck – if you are rowing this week you better know how to swim.” Meanwhile, the Irish sculler Sanita Puspure, who finished one place ahead of Negm in second, described the conditions as “horrific”.
  • (5) The purpose of this study was to determine peak aerobic power and associated physiological responses in highly competitive spinal cord injured (SCI) paraplegic road racers.
  • (6) Photograph: EPA Rael – once known as Claude Vorilhon, a French-born amateur sports racer and journalist – changed his name in 1973 after what he says was an encounter with extraterrestrials who declared that he had been chosen as their emissary to deliver a message of joy to humankind.
  • (7) Attitudes about helmet policy and actual use by racers were inconsistent; large percentages of those opposing mandatory helmet use in racing (51%) and in training (76%) used helmets themselves.
  • (8) The wheelchair racer Hannah Cockroft was one of those who won memorable gold medals in the stadium and will be back for the Anniversary Games next weekend which, as Bolt and Mo Farah fly in to compete, will provide an early stern test of the public appetite for athletics at the stadium.
  • (9) While the V1 skate technique is not the most economical roller skiing technique on flat ground, the lower associated perceived effort and respiratory exchange ratios may at least partially account for the general preference of cross-country ski racers to use the V1 skating technique rather than the double pole technique on flat terrain.
  • (10) Detailed knowledge of the morphologic sequence of events in lesion localization makes the celiac bifurcation in White Carneau and Show Racer pigeons a useful model for genetic comparisons of arterial wall metabolism and for investigating metabolic alterations occurring with atherogenesis.
  • (11) "This government has already scrapped the M4 bus lane, cut central government funding for money-making speed cameras and announced new measures to crack down on boy racers and reckless drivers while standing up for the decent majority," he said.
  • (12) Neither in the drag racer's bus nor wherever it went after that did anyone even bother to look at The Scream.
  • (13) Analysis of levels of total hydroxyproline and isodesmosine in the thoracic aorta and celiac bifurcation of prelesion, six-week-old White Carneau and Show Racer pigeons, revealed an increased accumulation of total collagen and cross-linked elastin in the White Carneau arterial tissue.
  • (14) A study of anthropometric and functional characteristics was conducted in a sample of 29 athletes, flatwater racers 18 kayakers and 11 canoeists.
  • (15) I remember building a Chopper-style bike out of a smaller racer with a tiny wheel on the front.
  • (16) The lipid composition of yolks of developing embryonic atherosclerosis-susceptible White Carneau (WC) and -resistant Show Racer (SR) pigeons was analyzed to determine whether embryonic nutrition might be a factor in the difference in susceptibility to aortic atherosclerosis.
  • (17) Even the Wachowski brothers, who made their fortunes with the Matrix trilogy, could not steer Speed Racer (2008) to success.
  • (18) The presence of specific receptors for the metabolism of acetylated low density lipoprotein (AcLDL) and beta-migrating very low density lipoprotein (beta-VLDL) was demonstrated in thioglycolate-elicited peritoneal macrophages from both atherosclerosis-susceptible White Carneau (WC) and resistant Show Racer (SR) pigeons.
  • (19) Facebook Twitter Pinterest Bike racers at the Hope Street event.
  • (20) The authors probed the vascular endothelial cell cytoskeleton in strains of pigeons that are atherosclerosis-susceptible and disease-resistant, namely, the White Carneau and Show Racer pigeons.

Tracer


Definition:

  • (n.) One who, or that which, traces.

Example Sentences:

  • (1) If tracer is introduced into the carotid artery after osmotic treatment, brain uptake is increased by a net factor of 50 (a factor of 70 due to elevation of PA, multiplied by 7 due to infusion by the carotid route) as compared to uptake by normal, untreated brain with infusion into a peripheral vein.
  • (2) Limitations include the facts that the tracer inventory requires a minimal survival period, can only be done postmortem, and has low resolution for cuts of the vagal hepatic branch.
  • (3) Thus, the enzyme-immunoassay shows specificity and sensitivity comparable to radioimmunoassay making use of radioactive tracer unnecessary.
  • (4) By contrast, there was a rapid exchange of tracer Leu carbon between placenta and fetus resulting in a significant flux of labeled KIC from placenta to fetus.
  • (5) Acetylcholine caused a rapid decrease (42% in 1 min) in 36Cl content of control acini which were preloaded with tracer for 12 min, but only a 23% decrease in acini of reserpine-treated rats.
  • (6) An isotopic steady state was established in five pregnant animals by the daily feeding of a tracer dose of cholesterol-4-(14)C. Comparison of maternal and fetal serum cholesterol SA revealed that an average of 42.6% of the serum cholesterol in the term fetus originated by transfer from the maternal blood.
  • (7) Injection of the tracer substance wheat germ agglutinin-horseradish peroxidase (WGA-HRP) directly into the basilar pontine nuclei using a ventral surgical approach resulted in the labeling of somata in many areas both rostral and caudal to the basilar pons.
  • (8) These results suggest that [99mTc]LDL acts as a trapped ligand in vivo and should therefore, be a good tracer for noninvasive quantitative biodistribution studies of LDL.
  • (9) The organization of the afferent and efferent connections of the sagittal Zones A and B of the cerebellar cortex of the rat have been studied using wheat-germ agglutinin conjugated to horseradish peroxidase as a tracer.
  • (10) Three exponential terms were required to fit the data for each of the tracers in all six experiments.
  • (11) The radiation dose to the tumor after a single injection of 500 muCi 131I-MAb 139H2 was 1,300 cGy over 7 days, which appeared slightly lower than the dose calculated after administration of a tracer dose of iodinated MAb 139H2.
  • (12) A light and electron microscopic double immunostaining technique was employed using the beta subunit of unconjugated cholera toxin as a neural tracer.
  • (13) Coronary collateral blood flow was measured with tracer microspheres in 3 different experimental conditons in the dog heart: 1. after occlusion of a large coronary artery in the in situ beating heart, 2. after occlusion of a small coronary artery in the in situ beating heart and 3. after occlusion of a large coronary artery in the isolated, empty beating, blood-perfused heart.
  • (14) This exogenous protein tracer could be seen in apical vacuoles and phagosomes in the cuboidal parietal epithelium.
  • (15) In the present study, we assessed transepithelial transport of Na+, K+ and Cl- in the isolated initial segment (P1) of rabbit colon in vitro using radioisotopic tracer fluxes and electrophysiological techniques.
  • (16) Each group of cattle consisted of six permanent members, two members fistulated at the oesophagus and one worm-free tracer calf.
  • (17) The immunoreactivity of the tracer can instead be lower than that shown by the standard, although it must not be too different.
  • (18) This reconstruction only requires very general assumptions, such as tracer-tracee indistinguishability and mass conservation; in particular it is independent of the glucose model structure, i.e., number of compartments and their interconnections.
  • (19) When normalized with respect to scala cross-section, the process of tracer movement across the spiral ligament is similar in the basal and third turns.
  • (20) The electron-dense tracers, ferritin, peroxidase, Thorotrast, and latex beads were all ingested but none was phagocytized.