نتایج جستجو برای: suit etching depth
تعداد نتایج: 179050 فیلتر نتایج به سال:
Periodontitis affected root surfaces are hypermineralized and contaminated with cytotoxic and other biologically active substances.The instrumented surface will inervitably be coverd by a smear layer following root planing with or without flap.Smear layer is resistant to saline rinsing, but may be removed with agents such as acids (e.g.citric acid), tetracyclines, EDTA, and laser.Low pH aqueous...
Background and Aim: The aim of this study was to investigate the shear bond strengthof composite to Emax porcelain using different methods of ceramic surface preparation (in vitro). Material and Methods: In this laboratory study, 36 porcelain disks were made and divided into four equal groups. The first group was prepared by sandblasting with 50 micron alumina particles, in the second group rec...
Abstract A haptic device provides users with physical feedback to enhance their experience in virtual reality (VR). We developed a multimodal suit, called as Pneumatic and Acoustic (PA) which exhibits high-resolution feedback, applies high pressure realistic vibration user. The PA suit artificially simulates the sensation of brief strong collisions such impact an explosion, ball, or fist. pneum...
An alternative fabrication method is presented for production of masters for single- or multi-layer polymeric microfluidic devices in a standard laboratory environment, precluding the need for a cleanroom. This toner transfer masking (TTM) method utilizes an office laser printer to generate a toner pattern which is thermally transferred to a metal master to serve as a mask for etching. With mas...
Nano-textured porous metal materials present unique surface properties due to their enhanced surface energy with potential applications in sensing, molecular separation and catalysis. In this paper, commercial alloy foils, including brass (Cu85Zn15 and Cu70Zn30) and white gold (Au50Ag50) foils have been chemically de-alloyed to form nano-porous thin films. The impact of the initial alloy micro-...
GaAs etch characteristics like etch rate, etch profile sidewall angle, etch surface morphology and selectivity are studied as a function of Inductively Coupled Plasma (ICP) power and Cl2/BCl3 flow rate ratio in ICP at low pressure (<15mTorr) and low RF bias power (<100W) regime to achieve moderate GaAs etch rate with an-isotropic profiles and smooth surface morphology. The low pressure regime e...
Cracks appeared in GaN epitaxial layers which were grown by a novel method combining metal organic vapor-phase epitaxy (MOCVD) and hydride vapor-phase epitaxy (HVPE) in one chamber. The origin of cracks in a 22-μm thick GaN film was fully investigated by high-resolution X-ray diffraction (XRD), micro-Raman spectra, and scanning electron microscopy (SEM). Many cracks under the surface were first...
The study of diamond surfaces is traditionally undertaken in geology and materials science. As a sample material, two natural crystals type Ia were selected, their luminescence nitrogen state was characterized. In order to etch the surface catalytic hydrogenation performed using Fe particles as an etchant. Micromorphology investigated by scanning electron laser confocal microscopy. It demonstra...
Aqueous NaOH with ethanol (strong) etchant is widely used. It shortens etching time effectively compared to normal conditions (6.25N at 70 °C). Two equations have been proposed calculate the molarity and volume. Another two empirical were introduced for estimating bulk etch rates of PADC etched in strong etchant. Up now, there no such available literature that can predict V b volumes. The funda...
The purpose of this study was to compare the effect of a self-etching primer and a non-rinse conditioner with the effect of a conventional adhesive system on the penetration depth in dentin of human teeth, using scanning electronic microscopy (SEM). Fifteen human third molar teeth were sectioned into 2 pieces. All pieces were flattened with grade 600 to 1200 silicon carbide paper and divided in...
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