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Total ecdysteroid-like immunoreactive material was assayed and quantified in adults of the parasitic nematode N. brasiliensis during the intestinal phase in the rat in order to detect possible physiological fluctuations in titre. Worms of the same sex isolated from one rat were pooled in order to quantify ecdysteroids using enzyme immunoassay (EIA). The(More)
T he purpose of this experiment was to investigate the possibility that weightlessness induces changes at the ultrastructural level. It has been shown that most cells, if not all, are morphologically arranged in an orderly fashion regarding the respective location of cytoplasmic organelles, the location of the nucleus relative to cytoplasmic organelles, and(More)
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