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Toughening has always been an important research direction of structure ceramics. The addition of secondary phases to the ceramic matrix to prepare composite ceramics is an effective toughening ...

Shell's Q1 results were solid, maintaining a solid balance sheet, boosting the dividend while cutting the buybacks. See why SHEL stock is downgraded to hold.

Thacker, Robert W. 1994. "Volatile shell-investigation cues of land hermit crabs: Effect of shell fit, detection of cues from other hermit crab species, and cue isolation." Journal of Chemical Ecology ...