Materials Literature
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Method of synthesis has been developed for a series of 3,6-di- tert -butyl-9 H -carbazole derivatives and their photochemical properties have been investigated. The dependence of the Steglich esterification reaction on the nature of the catalyst was studied. The synthesized compounds show fluorescent emission in the r…
In Brief This cutting-edge review of mesenchymal stromal cell therapy focuses on current methods of cell isolation, the paracrine pathways action and recent results of clinical trials that define critical parameters contributing to their successful use, including tissue source and donor age.
The entrapment of functionalized graphene, as filler, in polymeric conductive layers, such as polypyrrole (PPy), improves their engineering features. The objective was the association of graphene-PPy composite with nanosphere lithography generating hybrid polystyrene-graphene-PPy patterned platforms, seeking a further…
In this experimental study, Cu-5 wt% Gr- X wt% SiC ( X = 0, 5, 10, and 15) metal matrix hybrid composites were successfully fabricated using solid-state mixing (powder metallurgy) technique through the conventional atmospheric sintering process. The effect of hard reinforcement SiC content on the microstructure, densi…
In order to achieve high conductivity and transmittance of transparent conducting oxide (TCO), we attempted to fabricate Mg doped TiO2 (MgxTi1-xO2) thin films and characterized them for their structural and optical properties. The MgxTi1-xO2thin films have been deposited on glass substrate by doctor's blade technique.…
There are few studies that characterize the non-pigmented hair compared to pigmented hair. Furthermore, it is important to evaluate how the natural process of aging hair influences quality of life in women. For this purpose, a questionnaire was applied to evaluate the impact of greying hair and the appearance alterati…
Composite insulators are more vulnerable to ice flashover because of the short spacing. This paper was concerned with icicle growth under energized condition. Firstly, icing experiments were carried out to record the icicle length which was classified into three different stages, and show the effect of environmental p…
ResumoO objetivo deste trabalho foi avaliar a substituição, em diferentes níveis (5, 10 e 15%), da farinha de trigo por farelo de arroz desengordurado, sobre as características: capacidade de absorção de água, perda de massa ao fornear, volume específico, perfil texturométrico e cor da casca e do miolo dos pães. Os re…
This paper follows the line of contributions from earlier conferences and informs about more results of experimental program focused on the resistance of plain and fibre reinforced concrete elements against adjacent and contact blast. Concurrently, a detailed analysis of element response is carried out using ultra hig…
Modern transformers are composed of many kinds of insulation materials to form integral insulation system. To ensure a safe service, transformer oil should have excellent compatibility with insulation materials. In this work, the compatibility experiment between hydrogenated transformer oil and typical construction ma…
The back contact issues of Cu2ZnSnS4 (CZTS) solar cells are rarely studied. The conventional back contact layers used for CZTS are molybdenum (Mo) and moly-disulfide (MoS2). In this paper, the band offset at the Mo/MoS2 interface is reported. The Mo/MoS2 interface was formed by annealing Mo foil in a sulfur rich ambie…
We have developed a novel approach for grafting coordination polymers, structured as nanoparticles bearing surface reactive carboxylic groups, to amino-functionalized surfaces through a simple carbodiimide-mediated coupling reaction. As a proof-of-concept to validate our approach, and on the quest for novel hybrid int…
One of the technological problems in alloying molten steels with nitrogen is the precipitation of nitrogen into the gas phase upon the solidification of steels and the formation of nitrogen bubbles and porosity in steel ingots with the result that potentials of nitrogen as an alloying element are used incompletely. Th…
A fast pyrolysis probe/linear quadrupole ion trap mass spectrometer combination was used to study the primary fast pyrolysis products (those that first leave the hot pyrolysis surface) of cellulose, cellobiose, cellotriose, cellotetraose, cellopentaose, and cellohexaose, as well as of cellobiosan, cellotriosan, and ce…
Electro-thermal models are commonly used in simulations and designing MEMS devices, also in case of microbolometers. These models allow to estimate sensors performance before fabrication that consequently impacts on fabrication cost. Coupling of electric and thermal domains and building appropriate model for carrying…
A structural heterogeneity of the melt-spun Fe85.2Si2B8P4Cu0.8 alloy has been studied by spherical aberration (Cs) corrected high-resolution transmission electron microscopy. Hollow-cone illumination imaging revealed that the density of coherent scattering regions in the as-quenched Fe85.2Si2B8P4Cu0.8 alloy is much hi…
This paper provides a solution for reduction of inverter power rating in active power filter by installing passive power filter. As a result hybrid power filter is obtained. However, possible reduction of inverter power rating strongly depends on hybrid power filter topology. Therefore, three power filter devices are…
Abstract The present study reports on the leaching of natural pigment from Mucuna pruriens for dyeing of chrome tanned leather samples. The experiments were performed at temperature (30-70°C), time (30-90 min), feed to solvent ratio (1:3-1:7) and particle size (0.25-0.75 mm) using ethanol as solvent. The influence of…
Abstract — Transformer is a soul of both transmission and distribution systems. It performs low voltage to high voltage conversion in transmission lines and similarly high voltage to low voltage conversion in distribution lines. The operation of transformer is decided by the cooling provided to the system. The efficie…
Abstract The new topology of three-winding welding transformer is proposed. Each secondary winding is connected in parallel through the separate bridge rectifier to the welding arc. The main feature of the proposed device is parallel working of two secondary windings with different rated voltage. The advantage is nonl…