4 results for “Reaction Department”
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Medical study · Medical research · 2001
Spontaneous polymerisation on amphibole asbestos: relevance to asbestos removal
…solution of eugenol, a substance that can form a lignin-like polymer (a solid resembling a natural component of wood). After the reaction, the fibres appeared to be completely included in the polymer. In electron microscope…
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Medical study · Medical research · 2003
Ascorbic acid modifies the surface of asbestos: possible implications in the molecular mechanisms of toxicity
…consequence of the erosion of the outmost layers while hydration of silica tetrahedra yields new silanol groups. The activity in the Fenton-like reaction (OH from H(2)O(2)) decreases following surface iron depauperation. Conversely…
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Medical study · Medical research · 2001
Free radical generation in the toxicity of inhaled mineral particles: the role of iron speciation at the surface of asbestos and silica
…1.3 to 29 nmol/mg. It also increased one radical reaction, breaking a carbon-hydrogen bond, about 3-fold, while heating in air fully stopped that reaction. The other reaction, hydroxyl radical release from hydrogen…
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Medical study · Medical research · 2003
Long and short fiber amosite asbestos alters at a different extent the redox metabolism in human lung epithelial cells
…cells A549, long amosite fibers, more effectively than the short ones, initiate free radical reactions, inhibit the glucose 6-phosphate dehydrogenase activity and the pentose phosphate pathway, decrease the intracellular level of reduced glutathione, and increase…