Materials Literature
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Syntheses have been done at 2.5 GPa and 750 °C to examine the effects of varying the water content and composition of the solid starting mixture on the formation of glaucophane [Na 2 Mg 3 Al 2 Si 8 O 22 (OH) 2 ]. Amphiboles of apparently ideal glaucophane composition, confirmed by electron microprobe analyses, were ob…
The use of cellulosic fibers, such as cotton, kenaf, ramie, jute, flax, and bagasse, in the manufacturing of nonwoven composites for a variety of automotive parts, such as headliners, wall panels, and trunk liners, can significantly enhance their ‘end of life’ biodegradability and also improve their thermal insulation…
The dynamics of a viscous drop moving along a substrate under the influence of shear flow in a parallel-walled channel is investigated. A front tracking numerical method is used to simulate a drop with moving contact lines. A Navier slip boundary condition is applied to relax the contact line singularity. Steady state…
Prediction and optimization of polymer properties is a complex and highly nonlinear problem with no easy method to predict polymer properties directly and accurately. The problem is especially complicated with high molecular weight polymers such as engineering plastics which have the greatest use in industry. The effe…
Clean (i.e., carbonate- and hydroxyl-free) and hydroxylated MgO surfaces of various morphologies were used to study the correlation between thermodynamic Brønsted basicity (evaluated by the deprotonation of methanol and propyne followed by FTIR) and basic reactivity (evaluated by the conversion of 2-methyl-but-3-yn-2-…
Abstract Facile synthesis of ruthenium nanoparticles supported on the carbon nanofibers (CNFs) is accomplished by thermal decomposition of Ru3(CO)12; ruthenium species on the platelet-type CNF are dispersed homogeneously and selectively on the edge of the graphite layers with narrow size distributions and behaves as a…
It is well known that proteins are abundant in food and are vital to nutrition and biochemical function. What is not well known is that proteins derived from agricultural sources are used in everyday products such as glue and textiles. Research continues to find new uses for proteins in a wide variety of applications,…
This work studies the evolution of 1018 carbon steel surfaces during 3-15 day immersion in alkaline sour medium 0.1 M (NH4)2S and 10 ppm CN(-) as (NaCN). During this period of time, surfaces were jointly characterized by electrochemical techniques in situ (electrochemical impedance spectroscopy, EIS) and spectroscopic…
In this paper, the results of evaluating the activity of imidazoline-based corrosion inhibitors by means of electrochemical impedance spectroscopy (EIS) and other traditional electrochemical methods are reported. Tests were carried out on AISI 1040 (UNS G10400) mild steel specimens immersed in solution simulating the…
Abstract Mesoporous silica KIT‐6 has novel three‐dimensional gyroidal channel structure, space group of Ia‐3d , and ordered tunable pores up to 10 nm. In this paper, such mesostructured silica was employed as hard template to prepare semicrystalline gyroidal mesoporous MnO 2 . The structure was investigated by XRD, TE…
Single-crystal polarized Raman spectra (80 to 4000 cm -1 at 4 ≤ T ≤ 700 K) and powder IR spectra (1500 to 4000 cm -1 at 50 < T < 300 K) were measured for two microporous zeolites natrolite, Na 16 [Al 16 Si 24 O 80 ]·16H 2 O, and scolecite, Ca 8 [Al 16 Si 24 O 80 ]·24H 2 O to determine the behavior of H 2 O molec…
Abstract Xylans were selectively removed from paper-grade pulps by nitren extraction to produce dissolving pulps. Extraction parameters were optimised for a birch kraft pulp regarding time, temperature, liquor/pulp ratio, and total nitren charge. Furthermore, the applicability of the method was investigated for two ot…
The hydriding properties of magnesium have been studied at temperatures from 670 to 720 K and pressures from 19 to 55 MPa. The results suggest that the hydrogen pressure and hydrogen absorption/desorption cycles influence the nucleation process in the Mg-H 2 system. Using mechanical activation of MgH 2 + graphite and…
Protein structure validation is an important step in computational modeling and structure determination. Stereochemical assessment of protein structures examine internal parameters such as bond lengths and Ramachandran (varphi,psi) angles. Gross structure prediction methods such as inverse folding procedure and struct…
The synthesis and structure of organo-inorganic nanocomposites prepared by intercalation of monomers or polymers into the interlayer galleries of layered matrices are analyzed. General features and the mechanism of the intercalation process, as well as materials used for this purpose, mostly often naturally occurring…
The oxidation of CO with oxygen over (0.25–6.4)% CuO/CeO 2 catalysts in excess H 2 is studied. CO conversion increases and the temperature range of the reaction decreases by 100 K as the CuO content is raised. The maximal CO conversion, 98.5%, is achieved on 6.4% CuO/CeO 2 at 150°C. At T > 150°C, the CO conversion dec…
We report the synthesis of a variety of polylysine-b-polyleucine-b-polylysine, KmLnKo triblock copolypeptides and compare their gel forming properties to diblock copolypeptides. The architecture of the KmLnKo triblock copolypeptides forces the hydrophobic α-helical oligoleucine segments to pack perpendicular to extend…
This article focuses on the characterization of Terfenol-D material properties under magnetic bias, mechanical preloads, AC drive fields, frequencies of operation, and mechanical loads typical of many dynamic transducer applications. These are test conditions unlike those in most Terfenol-D characterization studies. T…
Abstract Novel photochromic bis‐styryl dihydroindolizines (DHIs) 5a‐β bearing different cycloalkanone ring sizes were prepared in 11–42% yield via nucleophilic addition of bis‐styryl cycloalkanones 2a–k to substituted spirocyclopropenes 1a–g . The absorption maxima (λ max ) of the colored betaines 4a‐β (formed after U…
Electron backscatter diffraction was used to examine the recrystallization behaviour of warm, clock-rolled uranium. A new uranium preparation method was developed, resulting in acceptable specimen surface finishes nearly every time, even for as-rolled specimens. Recrystallized fractions were differentiated from unrecr…