In the present work, ternary composites were synthesized from commercial titanias (Evonik Aeroxide P25, Aldrich anatase—AA and rutile—AR) two noble metals (gold platinum). This research focuses on composition of photocatalysts, especially metals. The ratio between varies 0.25 to 0.75% in each composite for metal. Transmission electron microscopy (TEM), X-ray diffraction (XRD) diffuse reflectanc...

Compact layers containing embedded semiconductor particles consolidated using pulsed electric current sintering exhibit intense, broadband near-infrared reflectance. The composites from nano- or micro-silica powder have a different porous microstructure which causes scattering at the air-matrix interface and larger reflectance primarily in visible region. 3 mm thick composite compacts reflect u...

A new, rapid methodology for trace analysis using solid-phase extraction is described. The two-step methodology is based on the concentration of an analyte onto a membrane disk and on the determination by diffuse reflectance spectroscopy of the amount of analyte extracted on the disk surface. This method, which is adaptable to a wide range of analytes, has been used for monitoring ppm levels of...

Single crystals of molybdenum-incorporated tris(thiourea)zinc(II) sulfate (MoZTS) are grown by the slow evaporation solution growth technique. Crystal composition as determined by single-crystal X-ray diffraction analysis reveals that it belongs to the orthorhombic system with space group Pca21 and cell parameters a = 11.153 (2), b = 7.7691 (14), c = 15.408 (3) Å, V = 1335.14 (4) Å(3) and Z = 4...

The physical nature and quantitative characteristics of the photoplethysmographic (PPG) signal under conditions external compression studied tissue area are theoretically investigated. Dependences constant variable components PPG on applied pressure revealed, which have maxima at certain values. model formation process takes into account optical mechanical properties biological tissues. is base...

Abstract. This research firstly aims to fabricate and characterize doped TiO2 nanoparticles (NPs) by iron Sulphur dopants, then the determination of photocatalytic activity NPs. Titanium tetraisopropoxide (TTIP), trichloride hexahydrate, thiouria, glacial acetic are utilized as precursors in hydrothermal method without using a template or surfactant. The synthesized NPs investigated X-ray diffr...

Wet-in-wet flow effect is a famous phenomenon in Chinese ink paintings. In this paper, we propose a new two-stage algorithm to synthesize this renowned effect. Given a reference image, in the first stage, we render the reference image using a new color ink diffusion synthesis algorithm. This physically-based algorithm explores a new and more sensitive Kubelka-Munk (SK-M) equation. As a result, ...

The species of genus Achillea, particularly those belonging to the Achillea millefolium group have received a lot of attention so far, due to their use in traditional medicine. Among the numerous chemical compounds isolated from the A. millefolium species, the sesquiterpene lactones are usually one of the major constituents (Seaman, 1982). Continuing our chemotaxonomic examination of Bulgarian ...

This paper presents the measurement of object reflectance from color images. We exploit the Gaussian scalespace paradigm to define a framework for the robust measurement of object reflectance from color images. Illumination and geometrical invariant properties are derived from a physical reflectance model based on the Kubelka-Munk theory. Imaging conditions are assumed to be white illumination ...