1. Investigation of respirable mine dust and crystalline silica dust characteristics and toxicity in nonmetal mines Restricted (Penn State Only) Author: Sharmba, Tsunami Title: Investigation of respirable mine dust and crystalline silica dust characteristics and toxicity in nonmetal mines Area of Honors: Environmental Systems Engineering Keywords: mine dustminingcrystalline silicarespirable dustrespirablemetalnonmetalbioavailability File: Login to Download Thesis Supervisors: Mohammad Rezaee, Thesis SupervisorJeremy Michael Gernand, Thesis Honors Advisor