That's one of the reasons that winemakers strive to make wines of greater extraction, though it also happens to be the fashion in winemaking right now, as winemakers try to make wines of maximum concentration, both in flavor and color.

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The bodywork is stretched tight between the front and rear fenders, and the rear fender is less pronounced than that of the front, reinforcing the concentration of vehicle weight over the driven wheels for maximum traction.

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But perhaps for radon concentration in the air, a radiation level of 5 to 10 picocuries per liter is about right for maximum benefit, speculates Myron Pollycove, a professor emeritus of laboratory medicine and radiology at the University of California, San Francisco.

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