Word: variant
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...promise in relieving the crises of adult patients suffering from some forms of acute leukemia. Earlier anti-leukemic drugs worked mostly in children and were almost as poisonous to the patient as to his cancerous cells. But 6-azauridine, which has to be injected, and a still newer chemical variant that can be taken by mouth apparently do not poison the patient's blood, brain or guts. They have helped severely ill patients for five or six weeks; now the researchers are trying to find drug combinations to achieve longer-lasting benefits...
...portions that even in an historical perspective it may be impossible to say whether they succeeded or failed. Yet it is a fact of politics that individual hopes ride on expedient fusions like this peace march; one must delve into its complex purposes and distinguish the dominant from the variant and the deviant in order to say yea or nay with more than prejudice...
...variant of baccarat, chemin de jer (literal meaning: railroad) is limited to two players, who alternate as banker. Each gets dealt two cards and may draw a third, with the aim of getting a count of nine or as close to it as possible. Tens and picture cards count zero...
Measles. Widespread testing in many countries of several variant vaccines; good prospects for choosing a safe and effective one within two years...
...been shown that malignant cells can be fooled into accepting a phony metabolite, or "antimetabolite." When it was shown in 1954 that solid cancers have an abnormal appetite for the metabolite called uracil, the University of Wisconsin's Dr. Charles Heidelberger set about making a phony variant of uracil. With Dr. Robert Duschinsky of Hoffmann-La Roche, Inc., he quickly found a way to make one by substituting an atom of fluorine for one of hydrogen at the No. 5 position on the molecular ring-hence, 5-fluorouracil. Many of the cancer cells accept 5-fluorouracil in place...