Quartz

12/01/2004 - "An in vivo study to compare a plasma arc light and a conventional quartz halogen curing light in orthodontic bonding."
05/01/2010 - "The spectroscopic method of optical emission was employed to diagnose the characteristic parameters of the arc plasma discharge in the quartz capillary. "
09/01/2006 - "The Glória quartz-monzodiorite shows metaluminous and calc-alkaline tendency with intermediate K content, comparable to that of volcanic-arc rocks. "
09/01/2006 - "The Glória quartz-monzodiorite: isotopic and chemical evidence of arc-related magmatism in the central part of the Paleoproterozoic Mineiro belt, Minas Gerais State, Brazil."
03/01/2008 - "Under our conditions, process dynamics using the W-MDEL light source are greater than with the more conventional photochemical methods that employ low-pressure Hg arc electrode lamps in synthetic quartz to degrade these two toxic contaminants."

08/01/2002 - "These studies showed that PVNO inhibited development of fibrosis from quartz dust and improved lung clearance of quartz after inhalation exposure. "
06/01/1998 - "Exposures to relatively low concentrations of quartz may be capable of causing hilar node fibrosis, impairing the clearance of any quartz inhaled subsequently. "
07/01/1992 - "The aim of our study was to assess morphological and functional features of AM in an experimental model of quartz-induced lung fibrosis by flow cytometric methods. "
07/01/2015 - "The quartz group lungs silicotic lesions focused on II~III level, the TD treatment group was mainly with I level, the NAC treatment group was mainly with I~II level, and the combined treatment group only showed little silicotic nodule, no obvious fibrosis. "
06/01/2003 - "Construction workers are exposed to quartz containing respirable dust, at levels that may cause fibrosis in the lungs. "

12/01/1991 - "We conclude that control of quartz exposure in the Vermont granite industry to levels which are on average less than the current OSHA standard has essentially eliminated definite radiographic changes of silicosis. "
01/01/2012 - "For this purpose, this study was planned to elicit the frequency of silicosis in quartz mill workers in Cine which is one of the largest quartz and feldspat areas, and to detect the working conditions, to inform the workers to improve the working conditions. "
01/01/2001 - "To study changes in liquid crystal structure of blood serum, the authors used intratracheal model of experimental silicosis in rats exposed to DQ12 quartz dust. "
05/01/1989 - "The purposes of this study were (1) to investigate the chronology of events in cellular and biochemical changes thought to be important in the development of silicosis, (2) to relate these to changes in lung function and radiograph, and (3) to evaluate the relation of quartz exposure and retention to individual response leading to early silicosis. "
01/01/1959 - "[Comparative animal experimental studies with quartz-containing ashes from acute and chronic pulmonary silicosis]."

01/01/2013 - "To investigate the potential causes of this relatively high lung cancer incidence, this study employed Fourier transform infrared spectroscopy (FTIR) transmission spectroscopy to identify the chemical composition of the PM2.5 collected using Quartz Fibre Filters (QFFs) coupled with MiniVolTM portable air samplers (Airmetrics). "
01/01/2011 - "The aim of this study was to detect early lung cancer rapidly with a novel and cost-effective quartz crystal microbalance (QCM) immunosensor. "
01/01/2001 - "A chronic study in rats was also used to predict the human excess risk of lung cancer at various quartz burdens, including mean Mcrit (0.39 mg/g lung). "
07/01/2013 - "A significant overall risk of lung cancer was determined, but using external and internal comparison groups could not confirm any dose response at our cumulative quartz dose levels."
07/01/2013 - "Dose responses for lung cancer were determined for duration of employment and cumulative quartz exposure for latency periods >20 years. "

10/01/2014 - "Further studies were performed to examine strain differences of the effects of chronic inflammation caused by quartz i.t. "
07/01/2009 - "In the first study, fine-sized quartz particle exposures in rats (500 nm) produced similar effects (inflammation, cytotoxicity, cell proliferation, and/or histopathology) compared to smaller 12-nm nanoscale quartz particles. "
01/01/2001 - "From a toxicokinetic/dynamic model fit to lung burden and pulmonary response data from a subchronic inhalation study in rats, we estimated the minimum critical quartz lung burden (Mcrit) associated with reduced pulmonary clearance and increased neutrophilic inflammation. "
10/01/2014 - "The present experiments indicated that chronic inflammation due to quartz instillation exerted promoting effects on lung carcinogenesis in F344, SD and Wistar-Hannover rats. "
03/01/2012 - "These findings identify ABA and LANCL2 as key mediators in quartz-induced inflammation, providing possible new targets for antisilicotic therapy."