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Improvement in P50 gating appears to be greatest in patients treated with clozapine.

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The effect of increasing levels of silicon on the microstructure and creep properties of high-pressure die-cast Mg-Al-Si (AS) alloys has been investigated. The morphology of the Mg 2 Si phase in die-cast AS alloys was found to be a function of the silicon content. The Mg 2 Si particles in castings with up to 1.14 wt pct Si have a Chinese script morphology. For AS21 alloys with silicon contents greater than 1.4 wt pct Si (greater than the ␣-Mg 2 Si binary eutectic point), some Mg 2 Si particles have a coarse "blocky" shape. Increasing the silicon content above the eutectic level results in an increase in the number of coarse faceted Mg 2 Si particles in the microstructure. Creep rates at 100 hours were found to decrease with increasing silicon content in AS-type alloys. The decrease in creep rate was most dramatic for silicon contents up to 1.1 wt pct. Further additions of silicon of up to 2.64 wt pct also resulted in significant decreases in creep rate.

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