Word: ratio
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...tests over those enrolled in low-budget schools. Differences among public high schools affect their students even less. "Almost every high school has some dropouts, some students who take a diploma but do not attend college, and some students who enter college." With surprisingly little variation between schools, the ratio of those groups to one another is now about 1 to 2 to 2, according to Jencks...
Genevieve Austin, assistant dean of students, said last week that the 41-year-old structure on Garden Street would help relieve a normally tight housing situation complicated by this year's large freshman class. An increase in the number of women admitted to improve the sex ratio has raised the number of freshmen by about 100 this year...
...issue of equal admissions for women versus the current 2.5-to one ratio of men to women, Jewett said he dislikes both. "Personally, I'm not comfortable with artificial ration not based on the facts of the situation, he said...
...dating technique was conceived by Chemist Jeffrey Bada of the Scripps Institution of Oceanography while he was trying to date some fossil-laden sediment from the ocean floor. The standard method for determining the age of fossils is the so-called carbon 14 clock, which is based on the ratio of ordinary carbon atoms to atoms of the radioactive isotope carbon 14 found in the specimen. The carbon 14 atoms decay at a known rate and are not replenished after the creature dies; thus the proportion of ordinary carbon to carbon 14 slowly increases. But the carbon clock only works...
Bada decided amino acids might help open those pages. Using standard lab equipment, he found that it was an easy matter to measure the ratio of left-handed to righthanded molecules in a common amino acid called isoleucine, and he was able to estimate the age of fossils from that ratio. What is more, his tests required only a tiny sampling of material and could be completed in a few hours. There is one serious hitch, he reports in Earth and Planetary Science Letters. Because the rate at which amino acids change their configuration varies significantly with heat, the temperature...