In the CR (Renazzo-like) chondrite group, many chondrules have successive igneous rim (IR) layers, with an outer layer that contains a silica mineral and/or silica-rich glass (silica-rich rims, SIRs). Models for SIR formation include (1) accretion of Si-rich dust onto solid chondrule surfaces, followed by heating and cooling (2) condensation SiO(gas) surface partially molten chondrules. We eval...

OBJECTIVE To use various exposure-response models to estimate the risk of mortality from lung cancer due to occupational exposure to respirable crystalline silica dust. METHODS Data from a cohort mortality study of 2342 white male California diatomaceous earth mining and processing workers exposed to crystalline silica dust (mainly cristobalite) were reanalyzed with Poisson regression and Cox...

Industrial dust generation from material processing is an uninterrupted phenomenon, hence analyzing materials of origin with particles important to comprehend the entire scenario occupational health exposure (OHE). In this study, we investigated morphological, elemental, and mineralogical characteristics engendered in cement industry (CI) Bangladesh. The samples were accumulated collectors inte...

Glass fiber is widely used in various modern industrial applications because it has the advantages of good electrical insulation performance and process ability. Inevitably, some flawed glass generated during manufacturing processes becomes waste and, recent years, treatment or recycling become an environmental concern. Since brittle, non-wearing, can easily generate static electricity after fr...