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OBJECTIVE To observe the effect of different frequency electroacupuncture (EA) on hippocampal substance P (SP) and beta-endorphin (beta-EP) in rats with gastralgia so as to explore its underlying mechanism in preventing and relieving visceral pain. METHOD Fifty rats were randomly divided into control, sham operation, model, low- frequency-EA and high(More)
D201 resin and P507 extractant diluted with sulfonated kerosene were used to respectively separate vanadium and scandium, and impurity ions from hydrochloric acid leaching solution of red mud. More than 99% of vanadium was selectively adsorbed from the hydrochloric acid leaching solution under the conditions of pH value of 1.8, volume ratio of leaching(More)
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