Materials Literature
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Pyridoxal kinase catalyzes the transfer of a phosphate group from ATP to the 5' alcohol of pyridoxine, pyridoxamine, and pyridoxal. In this work, kinetic studies were conducted to examine monovalent cation dependence of human pyridoxal kinase kinetic parameters. The results show that hPLK affinity for ATP and PL is in…
A new strategy for preparing porphyrins that bear up to four different meso-substituents (ABCD-porphyrins) relies on two key reactions. One key reaction entails a directed synthesis of a 1-protected 19-acylbilane by acid-catalyzed condensation at high concentration (0.5 M) of a 1-acyldipyrromethane and a 9-protected d…
We use density functional theory to examine the properties of VO x ( x = 1−4) isolated clusters supported on rutile TiO 2 (110) and CeO 2 (111) surfaces. We calculate the structure of the clusters, the charge on the atoms in the clusters, the vanadium 2p core-level energies, the energy of the reactions VO x (s) + 1 /…
This work reported a novel epoxy system that can perform a self-repairing operation against cracks at elevated temperature. For this purpose, a two-component healing agent consisting of microencapsulated epoxy and imidazole was pre-embedded into epoxy matrix. The microencapsulated epoxy was self-synthesized in advance…
Abstract One of the most oft-confronted challenges in materials science, when using scanning electron microscopy, is the limitation of the size of the sample being examined, as well as the analysis application planned. Normally, only small samples in the order of ten to a hundred millimetres in diameter may be investi…
Very few studies have focused on the optimisation of the nanocrystalline pulsed plasma electrolytic carbonitriding process parameters. A design of experiment technique, the Taguchi method, has been used to optimise the nanocrystalline pulsed plasma electrolytic carbonitriding. The experimental design consisted of four…
Systematic study on magnetic and electrical transport properties has been performed on the Cr-doped Pr0.5Ca0.5Mn1−xCrxO3 (x=0, 0.03, 0.05, 0.07, 0.10) system. The results show that Cr-doping leads to melting of the charge ordering and induces phase separation. For the sample x=0.10, reentrant spin glass behavior is ob…
On the basis of literature review the methods of purification of the products of polyurethane (PUR) waste glycolysis, with the aim to reuse them in PUR syntheses, were presented. These methods are: extraction, distillation, and removing of amine groups, detrimental in the further process of PUR preparation, by use of…
A method has been introduced to realize multi-states storage in phase change memory (PCM) by using stacked phase change films with different amorphous resistivity. The amorphous resistivity of each phase change layer was selected to make the stacked films crystallize successively with the increase of current, and so o…
Natural and synthetic layered iron hydroxysulfides: tochilinite and valleriite, have been investigated by Mössbauer spectroscopy. Tochilinite, magnetite, troilite, and pyrite phases were found in the products of tochilinite synthesis under different conditions. The relative contents of the phases found are determined…
Copolymer additives can be useful to enhance the compatibility and interfacial adhesion between polar wood materials and nonpolar polyolefin. This improved interaction among materials can lead to improved performance attributes, especially for those properties influenced by the interphase region. Although considerable…
The purpose of this study was to determine the most defensible taxonomic level (species or variety) of the diatom Cymbella janischii and whether it qualifies as a Northwest endemic. C. janischii and C. mexicana belong to a guild of stalked colonial benthic diatoms that have been responsible for aquatic habitat degrada…
This paper presents an original semi-analytical method (SAM) for computing the 2D current distribution in conductors and superconductors of arbitrary shape, discretized in triangular elements. The method is a generalization of the one introduced by Brandt in 1996, and relies on new and compact analytical relationships…
Abstract Usual rubber products are a composite from rubber and nano-filler ( e.g. silica, carbon black, etc. ), and it is believed that the good dispersion of the nano-filler is the most important issue determining the performance of rubber vulcanizates. So far, transmission electron microscopy (TEM) has been the most…
Eu3+→Eu2+ conversion caused by thermal treatments and exposures to ionizing radiations was studied using photoluminescence in bulk and nano powders of CaF2:Eu. It was found that there is no radiation-induced Eu3+→Eu2+ conversion in the nano powders. Thermal Eu3+→Eu2+ conversion, on the other hand, takes place at much…
In the present paper, the authors report on the electrochromic properties of electron beam evaporated tungsten oxide (WO 3 ) thin films at different electrolytes. The authors observe the better electrochromic performance for the as deposited room temperature prepared films than the higher substrate temperature prepare…
An air-ingress accident in a VHTR is anticipated to cause severe changes of graphite density and mechanical strength by oxidation process resulting in many side effects. However, the quantitative estimation has not been performed yet. In this study, the focus has been on the prediction of graphite density change and m…
Phenyl salicylate (salol) crystals were grown from mixtures of varying composition. The analysis of growth rates revealed changes in growth rate similar to observations made by other authors. Considering relative growth rates to characterize crystal morphology, the latter was also found to depend upon impurity concent…
Novel estrogen-conjugated pyridine-containing Gd(III) and Eu(III) contrast agents (EPTA-Gd/Eu) were designed and effectively synthesized. Convenient to administration and MRI experiments, both EPTA-Gd and EPTA-Eu are soluble in water. The EPTA-Gd selectively binds with a micromolar affinity to the estrogen receptor an…
The induction period, t ind, in the process of heterogeneous nucleation of CaCO 3 in aqueous CaCl 2 −Na 2 CO 3 solution was investigated. The t ind was measured by applying the conductivity method. Diatomaceous earth and zirconium oxide were used as foreign particles to induce heterogeneous nucleation. The experimenta…