Buscar
Mostrando ítems 71-80 de 158
Thin polymer films prepared by plasma immersion ion implantation and deposition
(Elsevier B.V., 2005-02-14)
This work describes an investigation of the properties of polymer films prepared by plasma immersion ion implantation and deposition. Films were synthesized from low pressure benzene glow discharges, biasing the samples ...
Manganese(III) porphyrins: Catalytic activity and intermediate studies in homogeneous systems
(Elsevier B.V., 1997-03-07)
We studied how solvent, stirring method, PhIO/MnP molar ratio, presence of water and axial ligand affect the catalytic activities of Mn(TPP)Cl, Mn(MNPP)Cl, Mn(TDCPP)Cl and Mn(TFPP)Cl in the oxidation of cyclohexane by PhIO. ...
Controlled fluorination of a-C:F:H films by PECVD of ethylene-hexafluorobenzene mixtures
(Elsevier B.V. Sa, 2008-12-25)
Highly fluorinated plasma polymers are chemically inert,acid resistant and have low friction coefficients, thereby being useful in chemical laboratories and for tribological applications. Here we report the plasma ...
Dermal type i collagen assessment by digital image analysis
(2015-01-01)
Type I collagen is the main dermal component, and its evaluation is relevant to quantitative studies in dermatopathology. However, visual gradation (0 to 4+) has low precision and high subjectivity levels. This study aimed ...
Band Structure Engineering by Alloying for Photonics
(2018-09-04)
Surface plasmon polaritons (SPPs) enable the deep subwavelength confinement of an electromagnetic field, which can be used in optical devices ranging from sensors to nanoscale lasers. However, the limited number of metals ...
Using wavelet sub-band and fuzzy 2-partition entropy to segment chronic lymphocytic leukemia images
(2018-03-01)
Histological images analysis is an important procedure to diagnose different types of cancer. One of them is the chronic lymphocytic leukemia (CLL), which can be identified by applying image segmentation techniques. This ...
Slat Noise from an MD30P30N Airfoil at Extreme Angles of Attack
(Amer Inst Aeronautics Astronautics, 2018-03-01)
This study investigates the slat noise of a two-dimensional scaled, unswept, and untapered MD30P30N high-lift model. The experimental data refer to aeroacoustic and aerodynamic measurements in a closed-section wind tunnel ...
Effect of Bubble Seal on Slat Noise
(Amer Inst Aeronautics Astronautics, 2019-04-01)
This paper reports a study of the sound emitted by a slat of a two-dimensional three-element MD30P30N airfoil, on which a two-dimensional excrescence was installed to represent a sealing device. Experiments were conducted ...
Nanostructured ZnS:Cu phosphor: Correlation between photoluminescence properties and local structure
(2019-02-01)
Zinc sulfide (ZnS) is a II–VI inorganic semiconductor material and has received remarkable attention because of fundamental physical properties, versatility, nontoxicity, chemical stability and has been widely applied to ...
Improvements in closed-section wind-tunnel beamforming experiments of acoustic sources distributed along a line
(2019-12-15)
Phased-array microphone techniques are widely used tools for the measurement and analysis of aeroacoustic noise sources. Nevertheless, beamforming results of sources distributed along a line, such as airfoil trailing-edge ...