65 results for “Reaction Department”, page 1 of 4
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Medical study · Medical research · 2014
Reaction mechanism for the aqueous-phase mineral carbonation of heat-activated serpentine at low temperatures and pressures in flue gas conditions
…microscopy (SEM) analysis. Investigation of the serpentinite carbonation reaction mechanisms under conditions close to a direct flue gas treatment showed that increased dissolution rates could be achieved relative to prior work, with an average Mg dissolution…
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Medical study · Medical research · 1983
Reaction of mineral dusts with primary lung fibroblast cultures
This laboratory study, which also reviewed the authors' earlier work, tested nine mineral dusts on rabbit lung fibroblast cultures (collagen-making cells). Single doses of 10 to 1000 µg per culture were added on day 3. DNA and cell-layer collagen…
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Medical study · Medical research · 1984
Fiber localization and its relationship to lung reaction in rats after chronic inhalation of chrysotile asbestos
…with histologic changes indicating marked epithelial injury. Increased amounts of fibers are also localized in the lung interstitium with continued exposure to asbestos and are associated with a progressive interstitial fibrotic reaction. Following cessation of exposure…
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Medical study · Medical research · 2006
Mineral-fluid interaction in the lungs: insights from reaction-path modeling
…from previous work described in the literature. Modeling of reaction paths in both closed and open systems confirms previous suggestions that chrysotile dissolves faster than tremolite in lung fluid, which offers an explanation for the apparent…
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Medical study · Medical research · 2010
Exposure to chrysotile asbestos causes carbonylation of glucose 6-phosphate dehydrogenase through a reaction with lipid peroxidation products in human lung epithelial cells
In this laboratory study, the authors exposed A549 cells, a human lung carcinoma cell line described as lung epithelial type II cells, to UICC chrysotile B asbestos for 5 hours. One comparison also used crocidolite. No people or animals were…
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Medical study · Medical research · 2018
The Self-sustained High temperature Synthesis (SHS) technology as novel approach in the management of asbestos waste
…experimented in chrysotile breakdown. By means of two reactions such as Mg3Si2O5(OH)4 + Fe2O3 + 3 Mg and 2Mg3Si2O5(OH)4 + Fe3O4 + 4 Mg the chrysotile was completely converted into forsterite-rich olivine. Different mixtures of…
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Medical study · Medical research · 1988
Progressive lung cell reactions and extracellular matrix production after a brief exposure to asbestos
…this would be the most likely site of a significant cellular or fibrotic reaction. The characteristics and progression of tissue reactions occurring at first alveolar duct bifurcations after a single brief asbestos exposure was defined using…
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Medical study · Medical research · 1988
Formation of 8-hydroxydeoxyguanosine by asbestos and man made mineral fibres
…were compared with chrysotile fibres for their capacity to hydroxylate 2-deoxyguanosine to 8-hydroxydeoxyguanosine, a reaction that is mediated by formation of hydroxyl radicals. All three fibres produced 8-hydroxydeoxyguanosine in the absence of H2O2…
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Medical study · Medical research · 2004
Chestnut bur-shaped aggregates of chrysotile particles enable inoculation of Escherichia coli cells with plasmid DNA
…and chrysotile particles was exposed to agar using stirring apparatus, which allowed a constant vertical reaction force to be applied to the surface of the gel. Fluorescence microscopy was then used to illustrate the adsorption of…
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Medical study · Medical research · 2019
Oxidative effects of lungs in Wistar rats caused by long-term exposure to four kinds of China representative chrysotile
…or 12 months. The lungs showed inflammation at 3 months, a fibrotic reaction at 6 months and severe fibrosis at 12 months. Markers of cell damage in lung washing fluid rose in exposed groups. In the…
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Medical study · Medical research · 2019
Physiological adaptations to serpentinization in the Samail Ophiolite, Oman
…Water pH ranged from 7.6 to 11.3; the authors used pH as a rough guide to how far a rock-water reaction called serpentinization had progressed. They measured water chemistry and sequenced microbial DNA…
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Medical study · Medical research · 2015
Direct gas-solid carbonation of serpentinite residues in the absence and presence of water vapor: a feasibility study for carbon dioxide sequestration
…mineral extraction and separate CO2 capture steps. The present is a laboratory scale study to assess the possibility of CO2 fixation in serpentinite mining residues via direct gas-solid reaction. The degree of carbonation is measured…
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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 · 1996
Distinctive profile of alveolar macrophage-derived cytokine release induced by fibrogenic and nonfibrogenic mineral dusts
…BAL) for BAL cell populations and cytokine production in conjunction with histopathological assessment of lung tissue. Chrysotile B and short 4T30 chrysotile fibers induced chronic inflammatory reactions characterized by alveolar macrophage (AM) accumulation that resulted, respectively…
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Medical study · Medical research · 2004
Re: Controlled use of asbestos
…which were not published, reported fibrotic lesions or lung damage; in 1966 the Coalinga sample produced the most severe reaction. The authors stated that UCC consultants misrepresented Pinkerton's data. Their review of King City mine…
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Medical study · Medical research · 2008
Detection of chrysotile asbestos by using a chrysotile-binding protein
…m' elsewhere. In rockwool mixed with chrysotile, the bound protein was released from the washed sample and then reacted: a one-minute color reaction detected 1% chrysotile, and a 30-minute incubation detected 0.1%. The…
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Medical study · Medical research · 2000
Phospholipase A2-mediated superoxide production of murine peritoneal macrophages induced by chrysotile stimulation
…induced O(2) production, and (2) two different kinds of PLA(2) work upstream and downstream of PKC, but (3) G-protein, 5-LO and COX metabolites, and PAF have no modulatory role in the reaction.
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Medical study · Medical research · 1983
Small-airway lesions in patients exposed to nonasbestos mineral dusts
…which they call mineral dust airways disease, is a nonspecific reaction of the small airways to inorganic particulates. The presence of such changes casts considerable doubt on the theory that small-airway abnormalities in asbestos workers…
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Medical study · Medical research · 2013
Sources of organic nitrogen at the serpentinite-hosted Lost City hydrothermal field
The reaction of ultramafic rocks with water during serpentinization at moderate temperatures results in alkaline fluids with high concentrations of reduced chemical compounds such as hydrogen and methane. Such environments provide unique habitats for microbial communities…
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Medical study · Medical research · 2008
Magnesium hydroxide extracted from a magnesium-rich mineral for CO2 sequestration in a gas-solid system
Magnesium hydroxide extracted from magnesium-bearing minerals is considered a promising agent for binding CO2 as a carbonate mineral in a gas-solid reaction. An efficient extraction route consisting of hydrothermal treatment on serpentine in HCl…