نتایج جستجو برای: micro silica
تعداد نتایج: 151315 فیلتر نتایج به سال:
An external-cavity diode laser is reported with ultralow noise, high power coupled to a fiber, and fast tunability. These characteristics enable the generation of an optical frequency comb in a silica micro-resonator with a single-soliton state. Neither an optical modulator nor an amplifier was used in the experiment. This demonstration greatly simplifies the soliton generation setup and repres...
The most common building material utilized worldwide is concrete. Concrete with higher compressive strength becoming more and in demand as the trend toward using it widely for high rise buildings. Experimental study of glass fiber (GF) reinforced concrete incorporating micro silica was investigated this study. prepared by M40 mix. GF 12 mm length aspect ratio 857 used. Four volume fractions 0%,...
Background and Objective: Since the preparation of antibacterial materials in dentistry is very noticeable, therefore, we tried to evaluate this effect on Streptococcus mutans by addition of silica nanoparticles to LCGI (light curing glass ionomer). Materials and Methods: In this in vitro study, we had five LCGI experimental groups that contained 0, 0.2, 0.5, 1, and 2% (w/w) of silica nanopa...
With the increase in use of nanomaterials, there is growing concern regarding their potential health risks. However, few studies have assessed the role of the different physical characteristics of nanomaterials in allergic responses. Here, we examined whether intranasally administered silica particles of various sizes have the capacity to promote allergic immune responses in mice. We used nanos...
Synthetic lamellar silica and hybrid lamellar silicas have been prepared by liquid crystal templating, template extraction and silanization. The samples have been characterized by thermogravimetric analysis (TGA), carbon analysis, spectroscopy, X-Ray diffraction (XRD) and nitrogen adsorption. The XRD analyses have shown that the lamellar periodic stacking is preserved for all samples. The quant...
Diatoms are single-celled algae which possess characteristic rigid cell walls (frustules) composed of amorphous silica. Frustule formation occurs within a specialised organelle termed thc silica deposition vesicle (SOY). During diatom morphogenesis, silica particles arc transported to the SOY by silica transport vesicles, Once released within the SOY, the particles are then thought to diffuse u...
background: silicosis is considered an oxidative stress related disease that can lead to the development of lung cancer. in this study, our purpose was to analysis of volatile organic compounds (vocs) in the exhaled breath of workers exposed to silica containing dust and compare peak area of these compounds with silicosis patients and healthy volunteers (smokers and nonsmokers) groups. methods ...
Products for thin layer chromatography Ready-to-use layers for TLC Summary of MN ready-to-use layers for TLC 263 – 265 TLC ready-to-use layers with standard silica 266 – 269 TLC ready-to-use layers with concentrating zone 269 HPTLC ready-to-use layers with nano silica 269 – 271 Nano plates with extremely thin silica layer 271 TLC and HPTLC plates with modified silica layers 272 – 277 HPTLC read...
Nanoscale Ga particles down to 5 nm were fabricated by an explosion via an in situ electron-beam irradiation on microscale silica-covered Ga balls in a transmission electron microscope. The explosion is confirmed to be a Coulomb explosion because it occurs on the surface rather than in the whole body of the insulating silica-covered Ga micro-balls, and on the pure Ga nano-balls on the edge of c...
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