Alireza Zaheri

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Therapy with antimicrobial drugs, such as clindamycin, that perturb the intestinal flora but fail to inhibit growth of other microorganisms can permit the proliferation of Clostridium difficile and the elaboration of exotoxin. Therefore, there has been increasing interest in the use of inhibitors of antibiotic resistance for use in combination therapy. The(More)
Pangolin scales form a durable armor whose hierarchical structure offers an avenue towards high performance bio-inspired materials design. In this study, the fracture resistance of African pangolin scales is examined using single edge crack three-point bend fracture testing in order to understand toughening mechanisms arising from the structures of natural(More)
(1 of 8) 1603993 performed on abalone nacre revealed that the material exhibits a toughness similar to aluminum even when it contains 95% cal-cite, a ceramic. [1] Espinosa and co-workers showed that such toughness arises from a millimeter size process zone consisting of tablets sliding without pullout. [2,3] Recent developments in advanced manufacturing(More)
Monolithic bulk metallic glasses (BMGs) exhibit a unique combination of mechanical properties, such as high strength and large elasticity limits, but the lack of ductility is considered the main Achilles' heel of BMG systems. To increase the competitiveness of BMGs vis-` a-vis conventional structural materials, the problem of catastrophic failure via(More)
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