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For the scientific community, the ability to fly mice under weightless conditions in space offers several advantages over the use of rats. These advantages include the option of testing a range of transgenic animals, the ability to increase the number of animals that can be flown, and reduced demands on shuttle resources (food, water, animal mass) and crew(More)
We tested the hypothesis that Na+ uptake and H+ release at fertilization of Urechis eggs might occur via a Na+:H+ exchange. Previous studies have shown that (1) Na+ uptake is proportional to the number of entering sperm in seawater with or without lowered Na+ and (2) H+ release is proportional to external pH. Therefore, to determine if Na+ uptake and H+(More)
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