8 results for “Reaction Department”
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Medical study · Medical research · 2008
The transformation sequence of cement-asbestos slates up to 1200 degrees C and safe recycling of the reaction product in stoneware tile mixtures
…this paper reports the description of the reaction path taking place during the firing of cement-asbestos slates up to the complete transformation temperature, 1200 degrees C. The reaction sequence was investigated using different experimental techniques…
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Medical study · Medical research · 2019
Iron from a geochemical viewpoint. Understanding toxicity/pathogenicity mechanisms in iron-bearing minerals with a special attention to mineral fibers
…and the experimental methods used for their study. Special attention is devoted to the Fenton-like chain reaction involving Fe2+ in the formation of highly reactive hydroxyl radicals. The final part of this review deals with…
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Medical study · Medical research · 2010
New detoxification processes for asbestos fibers in the environment
…Val Malenco fibers into non-fibrous debris. Chrysotile's crystal and spectral signatures disappeared, and magnesium oxalate was the only crystalline reaction product detected, apart from reactor steel debris. Treated Balangero fibers still showed serpentine features…
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Medical study · Medical research · 2009
The thermal transformation of Man Made Vitreous Fibers (MMVF) and safe recycling as secondary raw materials (SRM)
…wt.% of the melts of Rock and Glass wool gave promising results in terms of viscous sintering reactions and resistance to staining with the only weak characteristic being the color properties of the fired bodies which…
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Medical study · Medical research · 2008
In situ ESEM study of the thermal decomposition of chrysotile asbestos in view of safe recycling of the transformation product
…in cement-asbestos. It was found that the reaction kinetics of thermal transformation of chrysotile was highly slowed down in the presence of water vapor in the experimental chamber with respect to He. This was explained…
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Medical study · Medical research · 2005
Potential toxicity of nonregulated asbestiform minerals: balangeroite from the western Alps. Part 3: Depletion of antioxidant defenses
…crocidolite incubation. This effect was not related to any increased content of oxidized glutathione, or to any enhanced efflux of glutathione, suggesting that balangeroite fibers, like crocidolite, might favor the reaction of GSH with other molecules.
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Medical study · Medical research · 2012
Surface reactivity and cell responses to chrysotile asbestos nanofibers
…Alps. Electron microscopy, X-ray diffraction, and fluorescence spectroscopy revealed that the procedure does not affect mineralogical and chemical composition. Surface reactions related to oxidative stress, free radical generation, bioavailability of iron, and antioxidant depletion, revealed…
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Medical study · Medical research · 2013
Crystal chemistry of the high temperature product of transformation of cement-asbestos
…for 15 min. After firing, they underwent a series of solid state reactions leading to global structural changes of the matrix. Effects of annealing time and temperature on the crystallization kinetics were thoroughly investigated. Both factors…