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Showing 1 to 20 of 99 for “"Teflon"”.
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Teflon pyrolysis in terrestrial and reduced gravity environments
Includes bibliographical references (pages 52-53).
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Initiation and ignition of nano-aluminum in Teflon
The combustion of nano-aluminum in Teflon was studied using time-resolved laser spectroscopy. This reactive material has a stored energy of ~21 kJ cm-3, nearly twice the energy content of the best molecular explosives. Experiments investigated the fundamental combustion processes of initiation and …
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Hypersonic nonequilibrium flow over an ablating teflon surface
A complex chemical system of teflon/air mixture over an axisymmetric decoy at hypersonic reentry flight conditions has been analyzed by using the nonequilibrium viscous shock-layer method. The equilibrium catalytic wall boundary condition was used to obtain the species concentration at the wall. …
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Attachment of bacteria to teflon and buna-n-rubber gasket materials
Surface analysis of buna-N-rubber and teflon was performed. Scanning electron microscopy was used to analyze the topography of both materials and x-ray microanalysis identified the elemental chemical composition of the polymers. Teflon was primarily a smooth surface with random irregular spots, …
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Transposition of Offending Vessel Using Fibrin glue-coated Teflon Sling in Microvascular Decompression to Treat Glossopharyngeal Neuralgia
… success rate of this surgery. Fibrin glue-coated Teflon sling can contribute to good outcome of the MVD operation by aiding in successful transposition of the offending vessels that may be too tortuous to be affectively decompressed by conventional techniques.
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Characterizing the chemistry of yellow-poplar surfaces exposed to different surface energy environments using DCA, DSC, and XPS
… yellow-poplar upon exposure to aluminum, teflon, and heat/air surface treatments have been described using dynamic contact angle (DCA) and X-ray photoelectron spectroscopy (XPS) analysis. Results show that the surface molecular orientation of yellow-poplar can be controlled by increasing …
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Dielectric Characterization: A 3D EM Simulation Approach
… S-parameters can be readily calculated. A Teflon sample, for which the dielectric properties are well-known, is used for all measurements and calculations. After presenting a detailed derivation to obtain the theoretical S-parameters, the Teflon sample is measured and compared to the …
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Rheological measures of the fracture toughness of hydrogels
… conditions. The hydrogels were created using a Teflon spacer sandwiched between acrylic plates to induce the notch in the sample. Tests were performed with the hydrogel removed from the spacer with mineral oil and also with the hydrogel remaining in the Teflon spacer with mineral oil to reduce …
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Development and analysis of aluminum-PTFE reactive composite material
… use as a fuel. In this study a fluoropolymer; Teflon's inclusion in micron sized -325 mesh aluminum is suggested as a replacement to aluminum. Aluminum Teflon based energetic material see great potential for use in pyrotechnics, propellants and even explosives. A composite with composition …
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Dielectric measurement based microstrip transmission line
… is sticked on the test substrate which are FR4, Teflon and Roger 5880. During the measurement, the microstrip line is connected to vector network analyser through SMA connectors. It is found that this technique introduce error of 10.83%, 7.53% and 21.32% for FR4, Teflon and Roger 5880 …
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A kinematic coupling based 6 degrees of freedom dynamometer
… was not good enough. Finally, we tried using Teflon. Teflon is stuck to a steel plate that touches the contact points, leaving Teflon free of high stresses and allowing it to reduce friction between the contacts. The outcome was acceptable. In this case, hysteresis will be reasonably low, …
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Aderência in vitro de bactérias bucais a diferentes tipos de piercings linguais
… made of surgical steel, titanium, bioplast and teflon. It used 160 piercings to count the Colony Forming Units (CFU) and 32 piercings for analysis in Scanning Electron Microscope (SEM). Of these, 96 (24 of each type) were individually incubated in 5 mL BHI (Brain Heart Infusion) broth and 50 μL …
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Vitrificação de embriões Mus domesticus domesticus contidos em volumes diferentes de 9,0 m de etileno glicol.
… dois procedimentos de estocagem dos fios de teflon, denominados caixa de aço inoxidável e globete/raque. No experimento I, os 881 embriões coletados foram distribuídos em 4 tratamentos: tratamento 1 (T1= controle): 307 embriões foram cultivados in vitro em meio PBSm, acrescido de 0,4% de BSA; …
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Ion Beam Mixing of Metal/Fluoropolymer Interfaces
… 50 keV nitrogen implanted thin metal layers on Teflon PTFE (polytetrafluoroethylene). RBS analysis shows that thin layers copper and chromium approximately 300-400 Å thick become distributed though the implant layer of the Teflon. When the implant fluence increases the metal is distributed over …
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Chromosomal localization of a proinsulin transgene inserted with a transposon-based vector into Japanese quail, Coturnix coturnix
… gene detection in birds, development of Teflon-coated coverslip slides to facilitate laser microdissection of 0.5 ƒÝm samples, and chromosomal identification of proinsulin transgene insertions by laser microdissection and nucleotide sequence from G2 Japanese quail. The 28S rDNA was found …
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A review of matrix systems
… on making restorations last longer by using Teflon Tape.
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Sacrificial bearing components for quasi-isolated response of bridges subject to high-magnitude, low-probability seismic hazard
… elastomer and a stainless steel-on-Teflon sliding surface. The elastomeric bearings are further restrained in the transverse bridge direction with stiffened, L-shaped retainer brackets. Full-size bearing specimens were subjected to compression loads of up to 100 kips, cyclic …
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Propellant Surface Temperature and Plume Characteristics of Micro-Pulsed Plasma Thrusters
… ablation is the surface temperature of the solid Teflon(TM) propellant. All downstream plasma and neutral properties are dependent on this parameter. Infrared photovoltaic detectors using a p-n junction are used to measure the surface temperature of the Teflon propellant in real time. The detector …
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