Materials Literature
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The treatment of shavings, trimmings and splits of leather waste from tanneries has a potential to generate value-added products. In this study enzymatic treatment of leather waste was performed. This method utilizes alkaline protease produced by Bacillus subtilis in our laboratory by submerged fermentation. Optimum c…
Multiferroic Bi1-xGdxFeO3(x=0, 0.05, 0.1, 0.15, 0.2) ceramics were prepared by conventional solid state reaction method. X-ray diffraction was carried out to characterize the crystal structure and to detect any possible impurities existing in these ceramics. Frequency dependence of dielectric properties of Bi1-xGdxFeO…
Transformers are generally energized by random closing of the circuit breaker contacts, with the system voltage being applied on the transformer windings at random instants. This kind of switching normally introduces initial asymmetrical magnetic flux in the windings, driving the transformer into saturation. As a resu…
Two commercially available refractory ceramic materials primary used as substrates for fast firing of porcelain stoneware were investigated. The first one, commercially known as CONC, contains cordierite and mullite in the ratio 50:50. The REFO refractory composite material with coarser microstructure compared to CONC…
The International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM) was founded with the aim to promote scientific cooperation in the area of construction materials and structures worldwide. This mission is achieved through collaboration of leading experts in construction prac…
The processes of phase formation in the La 2 O 3 -Ho 2 O 3 -SrO-Al 2 O 3 system are investigated in the temperature range 1200–1500°C. The structural characteristics of the compounds described in the studied system are presented. It is established that the formation of (La 1− x Ho x ) 2 SrAl 2 O 7 solid solutions proc…
N -Trimellitylimido-S-valine was reacted with thionyl chloride, and N-trimellitylimidoS-valine diacid chloride was obtained in quantitative yield. The reaction of this diacid chloride with p-amino benzoic acid was performed in dry tetrahydrofuran, and bis(p-aminobenzoic acid)-N-trimellitilylimido-S-valine (6) was obta…
The synthesis of Ce O 2 ∕ Zr O 2 core-shell nanocrystals (NCs), which are Ce O 2 NCs overcoated by a thin Zr O 2 layer, has been studied together with Ce O 2 and Zr O 2 NCs using a hot surfactant colloidal route. Colloidal solutions in oleylamine of the Ce O 2 NCs with a 2.0 – 2.5 nm diameter and Zr O 2 NCs with a 2.5…
This paper realizes the hazards of chromium contamination and pollution caused by the use of Chrome Composite Leather-Clad (CCLC) rollers commonly used in cotton roller ginning industries and attempts to eliminate the chromium contamination and pollution during the complete process. Most of the cotton ginning operatio…
Two genes for acetoacetyl-CoA reductase (phbB) and poly-3-hydroxybutyrate (PHB) synthase (phbC), from Ralstonia eutropha were transformed into rice and Tamarix to change their fiber characteristics by producing PHB in these plants. Expression of the genes was detected by RT-PCR. The enzyme activity of phbB was confirm…
Alkali–silica reaction (ASR) continues to be a detriment to the long-term performance of concrete. Certain initial conditions related to material alkalinity, aggregate reactivity, humidity, and temperature conditions are known to initiate ASR. A key factor in the prediction of ASR in concrete over time is the reactivi…
This paper describes a new way of applying the Woodward-Lawson method in order to avoid its limitations concerning pattern performance. The proposed method obtains the Woodward-Lawson beam coefficients by sampling a previously synthesized optimal pattern using the Orchard-Elliott method, what provides the advantages o…
In this experimental study, we investigated the effects of nozzle pressure, delivery speed and elastane content on the mechanical properties of core-spun yarns produced using the Murata vortex spinning system. Our findings show that the nozzle pressure, delivery speed, elastane content as expressed by the linear densi…
Polyimide/carbon nanotube (CNT) composite films for potential use in more efficient flexible copper clad laminated (FCCL) films for flexible printed circuit boards (FPCB) were prepared by mixing a polyisoimide (PII) solution and a CNT suspension in NMP followed by casting, evaporation, and thermal imidization. The CNT…
Cyclisation of N-terminal glutamine and/or glutamate to yield pyroglutamate is an essential posttranslational event affecting a plethora of bioactive peptides and proteins. It is directly linked with pathologies ranging from neurodegenerative diseases to inflammation and several types of cancers. The reaction is catal…
The effects of a Ti buffer layer on structural and electrochemical properties of arrayed nitrogen-containing carbon nanotubes ( NTs) directly grown on Si substrates have been investigated. Cyclic voltammograms using as redox couple were measured to study the electrochemical activities of NTs. The highest peak current…
Abstract Liquid crystal devices as a medium for holograms storage have been investigated. Long term memory effects in LC cells have been observed. Experiments proved that certain combination of insulating alignment layers has a major influence on the long term memory effect. Optimal liquid crystal cell construction al…
The water vapor oxidation behavior below 1000°C for porous silicon carbide ceramics with and without additive alumina was investigated. The relationship between the microstructure of porous SiC and vapor oxidation was examined. The varied microstructures, such as pore size and particle size were found to affect the wa…
In this study, a mechanically polished Ni-Ti alloy was subjected to isothermal oxidation (TO) in N2-20vol.%O2 at temperatures ranging from 300 to 800°C. TO-treated surfaces were then characterized by field emission type scanning electron microscopy (FE-SEM), energy dispersive X-ray spectrometer (EDX), X-ray electron s…
We have fabricated carbon nanotube field-emission displays (CNT-FEDs) panel with a 2 in. diagonal size using a screen printing method and in-situ vacuum sealing technology. The field emission properties of the CNT-FED panel with square-type CNT emitters were characterized and compared with those of the panel with line…