Materials Literature
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The paper presents a new driving mechanism made of SMA (Shape Memory Alloy), with which the robot is designed with advantages of light weight, compact structure, less joints, easily machined, etc. The robot is driven by energy which transformed by compression spring using SMA actuator when heating or cooling, and whic…
A microstrip patch antenna (MPA) has been fabricated using a conducting polymer (CP), polypyrrole (PPy) as radiating patch on a transparent 3 mm thick PlexiglasTMsubstrate. The bulk DC conductivity of the PPy patch is 2000 S/m and its thickness 120 μm. The MPA was designed for operating at 2 GHz. A similar antenna wit…
We describe a general-purpose thermoelectric temperature controller with 1 mK stability, 10 mK reproducibility, and 100 mK absolute accuracy near room temperature. The controller design is relatively simple and could be readily modified for use in different experimental circumstances. We also describe a time-domain nu…
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The effect of the partial substitution of Fe by Co and Mn on the structural and magnetic properties of Fe-Pd alloys has been investigated by means of calorimetric, magnetic and neutron diffraction measurements. The addition of Mn increases both the reversible and irreversible MT temperatures whereas the addition of Co…
The phase transformation of magnetite to h-Fe3O4 was investigated at high pressure and temperature by in situ resistivity measurements in a multi-anvil press. Experiments at pressures≤9 GPa show similar resistivity paths during heating and cooling, indicating the stability of magnetite. During heating at 10 and 12 GPa…
O objetivo deste trabalho foi avaliar a aplicação de quitosana no controle da podridão-amarga da maçã em pós-colheita e seus efeitos sobre Colletotrichum acutatum e a atividade da peroxidase nos frutos. Frutos previamente infectados com o patógeno foram imersos em suspensões de quitosana com diferentes concentrações e…
Carbamazepine was used as a well characterised model compound to assess three polymorph screening methodologies. It has been shown that parallel crystallisation followed by in situ analysis by XRPD is an excellent way of generating and analysing new solid forms of a substance in situ. Further methodologies utilising a…
An X-ray fluorescence technique has been developed for determination of the macroscopic composition of As-S-Se, As-S, and As-Se chalcogenide glasses. Reference samples for calibration have been prepared by direct elemental synthesis. The calibration error has been estimated.
Abstract The effects of Y 2 O 3 and Er 2 O 3 on the sintering behaviors, thermal properties and microstructure of AlN ceramics were investigated. The experimental results show that the sintering temperature can be decreased; the relative density and thermal behavior can be improved by adding rare earth oxide in AlN ce…
UNLABELLED: Chitosan is a D-glucosamine polysaccharide derived from chitin that displays an antimicrobial activity against bacteria and fungi. OBJECTIVE: to evaluate the antifungal effect of high molecular weight chitosan (HMWC) in clinical strains of Candida spp. METHODOLOGY: the susceptibility of forty strains of Ca…
Extremely thin diamond-like carbon (DLC) films are deposited by the filtered cathodic vacuum arc (FCVA) and plasma chemical vapour deposition (p-CVD) methods. The target thicknesses of the extremely thin protective DLC films deposited on a Si (100) surface by FCVA and p-CVD are 0·1, 0·4, 0·8, 1·0, 2·0, 5·0 and 100·0 n…
This paper treats approximate solutions for a self-folding problem of carbon nanotubes. It has been observed in the molecular dynamics calculations (Buehler, Kong, Gao, and Huang, 2006, “Self-Folding and Unfolding of Carbon Nanotubes,” ASME J. Eng. Mater. Technol., 128, pp. 3–10) that a carbon nanotube with a large as…
This paper reports on the results of investigations of the crack growth kinetics in glasses under different test conditions (in media containing moisture and under vacuum with the complete removal of water from the glass surface) in the test temperature range from room temperature to 430°C. The specific features of th…
Fiber optic reflectometry (FOR) and scanning electron microscopy (SEM) were used to study the regularities of the etching of a single-mode optical silica fiber with a germanium silicate core in subcritical and supercritical water. It was demonstrated that the rate of etching of the germanium silicate core, being highe…
RESUMEN. Catálogo de las algas verdes cocales de las aguas continentales de Andalucía. En España los estudios realizados de los ecosistemas acuáticos continentales han tenido sobre todo un enfoque ecológico. En la mayoría de los trabajos limnológicos las algas se han considerado como productores primarios en su conjun…
Abstract : This thesis investigates the use of porous materials in a multi-layered armor concept. The prototype layered structure consists of an initial high-strength material to slow down the projectile and cause significant plastic deformation, followed by an orthotropic wave-spreading layer to spread shock waves la…
In this work gasochromic effect in TiO2 thin films doped with palladium and tantalum (without catalyst film) have been described.The results have shown that in nanocrystalline TiO2:(Ta, Pd), with anatase structure, the film colorization effect in alcohol presence was observed.Both colorization and also bleaching effec…
Effects of mean powder size and size distribution on the microstructure and magnetic properties of anisotropic NdFeB sintered magnets were investigated. The hydrogen-decrepi- tated NdFeB alloy was jet milled and the jet-milled powder was subsequently divided by a classifier in order to eliminate coarse and fine partic…
Abstract Manganese dioxide (MnO2) particle was synthesized and introduced into epoxy resin to be microwave absorber. The spectroscopic characterization of the formation processes of MnO2 was studied by using X‐ray diffraction (XRD) and scanning electron microscopy (SEM). Microwave absorbing properties with different v…