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farine de quartz

silica dust

chimie / industries charbonnière et minière - iate.europa.eu

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Additive effects of exposure to silica dust and smoking on pulmonary epithelial permeability: a radioaerosol study with technetium-99m labelled dtpa....clearance from lung to blood of the radioaerosol solute technetium-99m labelled diethylenetriamine pentaacetate (99mTc-DTPA) has been reported in smokers and in workers exposed to silica dust....

général - core.ac.uk - PDF: www.pubmedcentral.nih.gov

Long-term exposure to silica dust and risk of total and cause-specific mortality in chinese workers: a cohort studyBackground: Human exposure to silica dust is very common in both working and living environments....

PDF: ftp:

Long-term exposure to silica dust and risk of total and cause-specific mortality in chinese workers: a cohort study.BACKGROUND: Human exposure to silica dust is very common in both working and living environments....

PDF: doaj.org

Chronic obstructive pulmonary disease due to occupational exposure to silica dust: a review of epidemiological and pathological evidenceOccupational exposure is an important risk factor for chronic obstructive pulmonary disease (COPD), and silica dust is one of the most important occupational respiratory toxins....

PDF: www.pubmedcentral.nih.gov

Relation between exposure to respirable silica dust and silicosis in a tungsten mine in china.To estimate the quantitative relation between exposure to respirable silica dust and risk of an attack of silicosis, 1151 workers exposed to silica dust and employed from 1958 to 1987 in a tungsten mine in China were investigated....

PDF: www.pubmedcentral.nih.gov

particulate silica

chimie - iate.europa.eu

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All-acrylic film-forming colloidal polymer/silica nanocomposite particles prepared by aqueous emulsion polymerization... The nanocomposite morphology comprises a copolymer core and a particulate silica shell, as determined by aqueous electrophoresis, X-ray photoelectron spectroscopy, and electron microscopy....

général - core.ac.uk - PDF: core.ac.uk

The decline and fate of an iron-induced subarctic phytoplankton bloom... Increased particulate silica export via sinking diatoms was recorded in sediment traps at depths between 50 and 125 m from day 21, yet increased POC export was not evident until day 24....

PDF: www.scopus.com

A hydrofluoric acid-free method to dissolve and quantify silica nanoparticles in aqueous and solid matrices... An often-insurmountable obstacle for SiO2-NP fate and hazard research is the challenging analytics of solid particulate silica species, which involves toxic and corrosive hydrofluoric acid (HF)....

PDF: doc.rero.ch

Global spatial distribution of natural riverine silica inputs to the coastal zone... We approximate fluxes of particulate silica in various forms (PSi) from fluxes of suspended matter, calculated from existing models....

PDF: www.loc.gov

One-step coating of fluoro-containing silica nanoparticles for universal generation of surface superhydrophobicityStable superhydrophobic surfaces with water contact angles over 170 degrees and sliding angles below 7 degrees were produced by simply coating a particulate silica sol solution of co-hydrolysed TEOS/fluorinated alkyl silane with NH3.H2O...

PDF: hdl.handle.net

particulata silica

industries charbonnière et minière - iate.europa.eu

silica flour

chimie - iate.europa.eu

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Bilateral spontaneous pneumothorax in chronic silicosis: a case report... People working in occupations like sandblasting, surface drilling, tunneling, silica flour milling, ceramic making, and so forth are predisposed to develop silicosis....

général - core.ac.uk - PDF: doaj.org

Experimental investigation, correlation, and dimensional analysis of near-wellbore formation treatment by gel particles and particle-gel system... Thus, the conditions leading to plugging of the high permeability zones during the treatment and conditioning of high permeability porous formations by suspended gel particles and silica flour particle-gel systems were studied and useful empirical correlations, dimensionless correlations, and charts were developed which can be used for effective and successful...

PDF: shareok.org

Silicosis in jade workers.... The source was found to be the silica flour that was added in a polishing process....

PDF: www.pubmedcentral.nih.gov

Solute response to changing nutrient loads in soil and walled ceramic cup samplers under continuous extraction... The 20-cm walled percolation sampler extracted soil water under continuous tension via a ceramic cup collector embedded in a silica flour layer, whose upper surface interfaced with field soil....

PDF: eprints.nwisrl.ars.usda.gov

Effect of elevated temperature on mechanical properties and microstructure of silica flour concreteAbstract — An experimental investigation was conducted to evaluate the influence of elevated temperatures on the mechanical properties, phase composition and microstructure of silica flour concrete....

PDF: citeseerx.ist.psu.edu

SiO2

chimie - iate.europa.eu

farine de quartz

quartz flour

chimie - iate.europa.eu

L'invention concerne un mortier aqueux à base de ciment alumineux, de wollastonite, de silicate de calcium en poudre et de farine de quartz adaptée au coulage d'objets réfractaires.

The invention relates to an aqueous mortar on the basis of aluminous cement, wollastonite, calcium silicate in powder form and quartz flour which is suitable for casting refractory objects.

bâtiment et travaux publics - wipo.int

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Development and mix design of hpc and uhpfrc... Mix design is focused first on the influence of various additives such as fly ash, silica fume and quartz flour and then to different dosage of steel fibers

général - core.ac.uk - PDF: www.scientific.net

On the early-age behavior of zero-slump concrete... For this purpose, the early-age behavior of two different fines (quartz flour and fly ash) is investigated by means of the intensive compaction test (IC-test)....

PDF: www.loc.gov

The influence of the fines on the early-age behavior of zero-slump concrete... For this purpose, the early-age behavior of two different fines (quartz flour and fly ash) is investigated by means of the intensive compaction test (IC-test)....

PDF: www.loc.gov

Influence of quartz flour on technological properties of self-completed concrete mixturesSubject: technological properties of self-compensating concrete mixtures with a fine-grained microfiller, represented by quartz flour....

PDF: vestnikmgsu.ru

Publications scientifiques

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Synthesis and characterization of sio2 nanoparticles and their efficacy in chemical mechanical polishing steel substrate... A nanopowder of SiO2 was prepared by the sol-gel method and was compounded into polishing slurry for the CMP of steel substrate....

politique et structures industrielles - core.ac.uk - PDF: doaj.org

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Biosynthesis of zno/sio2 nanocatalyst with palash leavesâ powder for treatment of petroleum refinery effluentThis work aims the synthesis and characterization of ZnO/SiO2 nanocatalyst from plant waste material by green route and application of this ZnO/SiO2 nanocatalyst for the treatment of petroleum refinery effluent....

chimie - core.ac.uk - PDF: doaj.org

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Biosynthesis of zno/sio2 nanocatalyst with palash leaves' powder for treatment of petroleum refinery effluentThis work aims the synthesis and characterization of ZnO/SiO2 nanocatalyst from plant waste material by green route and application of this ZnO/SiO2 nanocatalyst for the treatment of petroleum refinery effluent....

chimie - core.ac.uk - PDF: earchive.tpu.ru

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In vitro cytotoxicity of sio2 or zno nanoparticles with different sizes and surface charges on u373mg human glioblastoma cells...Biochemistry and Molecular Biology, Korea University Medical School and College, Seoul, South Korea *These authors contributed equally to this work Abstract: Silicon dioxide (SiO2) and zinc oxide (ZnO) nanoparticles are widely used in various applications, raising issues regarding the possible adverse effects of these metal oxide nanoparticles on human...

métallurgie et sidérurgie / chimie - core.ac.uk - PDF: doaj.org

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Phase equilibrium study of zno-'feo'-sio2 system at fixed po2 10-8 atm... Phase equilibria have been investigated in the system ZnO-Fe2O3-SiO2 in air and system ZnO-'FeO'-SiO2 in equilibrium with metallic iron....

chimie / métallurgie et sidérurgie - core.ac.uk - PDF: www.swinburne.edu.au