Materials Literature
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Since the factors that influence microstructure formation are extensive (e.g., alloy composition, heat treatment condition, etc.), quite a lot of experimental trial-and-error is often necessary when searching for the best combination of desired microstructure and material properties, even when the basic mechanism of m…
In recent years the need to standardize measurement protocols for quantifying the degree of ultraviolet radiation (UVR) protection provided by clothing has led to the introduction of a number of standards around the world. To date, these standards have specified spectral measurements of UVR transmission by clothing an…
Partial electronic and hole conductivity in Co doped LaGaO3 based perovskite oxide was investigated with the ion-blocking method. Typical S-shaped polarization curves were observed on La0.8Sr0.2Ga0.8Mg0.2−XCoXO3 (0 < X < 0.1). The oxygen partial pressure (PO2) dependence of the electronic and hole conductivity is esti…
Kinetic studies of Se75Te25–xSnx (x = 2, 4, 6, and 10) chalcogenide glasses are made using differential scanning calorimetry (DSC). Glasses heated with different heating rates in DSC show the glass transition and crystallization region for all the concentration of Sn. It is interesting to note that x = 4 and 6 in Se75…
Preparation of a Carbon Fiber-Nickel-Type Material and Investigation of the Electrocatalytic Activity for the Hydrogen Evolution Reaction , Daftsis, E., Pagalos, N., Jannakoudakis, A., Jannakoudakis, P., Theodoridou, E., Rashkov, R., Loukaytsheva, M., Atanassov, N.
The pyrolysis kinetics of styrene-butadiene rubber (SBR) was studied by the kinetic model which accounts for the thermal degradation of polymer at any time. The kinetic analysis was performed by a conventional nonisothermal thermogravimetric (TG) technique at several heating rates between 10 and 50 K/min in a nitrogen…
It is well known that rock is generally treated as a heterogeneous material and the heterogeneity of rock causes sizes distribution of fragmented rocks in blasting. This paper discusses experimental and numerical rock fragment size distribution. To evaluate fines in bench blasting, two test experiments were conducted…
The new ternary nitrides MYSi4N7 (M = Sr, Ba) have been investigated using first-principles techniques and experimental methods. The crystal structure data predicted are in good agreement with our measurements on prepared powder samples. Calculations also show that the electronic structure is strongly dependent on the…
The synthesis of p-tert-butylcalix[4]arene containing polymerizable groups at the lower rim is reported. A calixarene monomer with one methacryloyloxy group at the phenolic rim was copolymerized with methyl methacrylate, yielding linear polymers with pendant calixarene groups in the cone conformation. Chemical modific…
A general two-step procedure for the synthesis of metallotripyrrinates TrpyMOAc f with M = Co(II) , Cu(II) , Zn(II) and Pd(II) , and OAc f = trifluoroacetate, is described, starting from well-known monopyrrolic precursors and simple transition metal acetates. X-ray structural investigations were undertaken on four dif…
PURPOSE AND METHODS: Using two Japanese herbal medicines, Shakuyaku-kanzo-to (SK) and Toki-shakuyaku-san (TS), we have evaluated a novel strong antidysmenorrhea therapy. SK/TS cyclic therapy, in which the herbs are administered alternately within the menstrual cycle. RESULTS: All of the 17 dysmenorrhea patients includ…
In an effort to improve the reliability and versatility of spacecraft charging models designed to assist spacecraft designers in accommodating and mitigating the harmful effects of charging on spacecraft, the NASA Space Environments and Effects (SEE) Program has funded development of facilities at Utah State Universit…
Abstract CuCN was investigated by chemical analysis, IR spectroscopy and powder X-ray diffraction. A high-temperature phase of CuCN was identified and structurally characterized by Rietveld refinement. HT-CuCN is isotypic to AgCN (R3m (No. 166), Z = 3, a = 597.109(8), c = 484.33(5) pm, Cu (3a), C/N (6c), z = 0.3915(10…
The anti-tack action of polyvinylpyrrolidone (PVP) on hydroxypropylmethylcellulose (HPMC) solution was elucidated using a probe test method. The influence of PVP of varying molecular weights at various PVP concentrations and solution temperatures on the tackiness of HPMC solution was studied. The viscosity, surface te…
Supercritical carbon dioxide (scCO2) was employed to facilitate the efficient impregnation and in situ polymerisation of a range of methacrylate monomers within an ultrahigh molecular weight polyethylene matrix. Four alkyl functionalised methacrylate polymers have been investigated, namely PMMA, PEMA, PPMA and PBMA. T…
A new approach to analysis of the switching current allows to extract distribution function of the threshold field from the current data recorded during conventional hysteresis loop measurements. Quasi-static switching (domain kinetics in slow-increasing field) in spatially inhomogeneous ferroelectric was investigated…
STUDY DESIGN: A series of four case reports are presented. OBJECTIVE The case reports document completion of lumbar discography with gadolinium contrast followed by successful computed tomography scanning of intradiscal gadolinium. SUMMARY OF BACKGROUND DATA: Lumbar discography using gadolinium in cases of iodinated c…
From the viewpoint of the porous Si (PS) application as an antireflection coating (ARC) in crystalline Si solar cells, a comparative study has been made on the morphological, kinetic, and optical properties of both chemically and electrochemically etched PS. These results are correlated and interpreted in terms of a s…
A simple method of preparing luminescent cadmium sulfide nanoparticles passivated with the biological molecule adenosine triphosphate (ATP) is reported. The biological molecule ATP is used as a materials chemistry synthon rather than a biological entity and its interaction with a semiconductor quantum dot surface is i…
Non-toxic foul-release provides an environmentally friendly and sustainable technical solution to control micro- and/or macrofouling on ships' hulls. Silicone-based coatings have been used for foul-release at high or moderate ship speeds (> 15 knots). To remove the fouling from slower ships (< 15 knots), the macrofoul…