Materials Literature
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A corrosion rate model is developed for carbon steel in water containing CO{sub 2} at different temperatures, pH`s, CO{sub 2} fugacities and wall shear stresses. The model is based on loop experiments at temperatures from 20--160 C. The data are taken from a database containing more than 2,400 data points at various t…
The development of lamellar morphology in poly(oxymethylene) (POM) and its miscible blends was studied by synchrotron time-resolved small-angle X-ray scattering (SAXS), during primary and secondary crystallization at temperatures near 150°C. The blends contained two different diluents: poly(vinyl 4-hydroxy styrene) [c…
A one‐dimensional mathematical model of a spirally wound lithium/thionyl chloride primary battery is developed and used for parameter estimation and design studies. The model formulation is based on the fundamental conservation laws using porous electrode theory and concentrated solution theory. The model is used to e…
In this paper, polyisobutylene succinic anhydride adduct (PIB-SA) was modified by esterification with polyethylene glycol (PEG 600, 1000 and 2000) to obtain mono- and diterminal polyoxyalkynated PIB-SA. The monoterminal products were reacted with pentamethylene-hexamine (PMHA). The structures were confirmed by FT–IR a…
The dependence of temperature and strain rate on the mechanical properties of pineapple leaf fiber (PALF) reinforced polyethylene (LDPE) composites has been investigated. The effects of fiber loading, fiber orientation, and fiber treatment on the test properties were studied. The tensile strength of the composite was…
Abstract A simple two‐step process was developed to extract and purify medium chain‐length polyhydroxyalkanoates (MCL‐PHA) from bacterial cells ( Pseudomonas resinovorans ) grown on lard and tallow. The process consists of supercritical fluid extraction (SFE) of the lyophilized cells with carbon dioxide to remove lipi…
Hydrogen-induced cracking (HIC) and stress-oriented hydrogen-induced cracking (SOHIC) tests were conducted on a conventional type A516-70 (UNS K02700) pressure vessel steel exposed to hydrogen sulfide (H2S)-containing diglycolamine (DGA) gas-sweetening environments. Base-line HIC and SOHIC tests were conducted in NACE…
Abstract The title complex Eu(III)(TTA) 3 (phen) (where TTA = thenoyltrifluoroacetone monoanion; phen = 1,10‐phenanthroline) has been synthesized in mixed solvents of acetone and ethanol (1:1 volume ratio) and its crystal structure has been determined by X‐ray diffraction. The complex crystals are triclinic, space gro…
Abstract The universal capabilities of high resolution spot profile analysis low energy electron diffraction for in situ studies of surface morphology and surface defects will be discussed and demonstrated. The position of the diffraction spots is used to determine lateral lattice constants, step heights and the strai…
The photoinitiated polymerization of 2-chloro-1,4-phenylene bis[4-[6-(acryloyloxy)hexyloxy]benzoate] (1M) was studied. The monomer 1M exhibited a broad nematic phase between 24.9 and 113.7 °C on a DSC cooling scan. It was oriented in its nematic phase at a substrate coated with polyimide and unidirectionally rubbed wi…
Previous investigations have suggested that the phototactic behaviour of diatoms, as observed by the accumulation of diatoms in low/moderate intensity light spots and avoidance of high intensity light, is primarily due to a change in cell direction at light/dark boundaries. In order to better determine the nature of t…
Stereoregular poly(ester amide)s (PEAT n ) containing equal amounts of ester and amide groups have been obtained by polycondensation in solution from di- O -methyl- l -tartaric acid and aliphatic amino alcohols H 2 N(CH 2 ) n - 1 CH 2 OH. Suitable synthetic routes were designed to prepare either syndioregic ( s -PEAT…
We have shown that the domain V of bacterial 23 S rRNA could fold denatured proteins to their active state. This segment of 23 S rRNA could further be split into two parts. One part containing mainly the central loop of domain V could bind denatured human carbonic anhydrase I stably. This association could be reversed…
Preparation of a nonchromate, self-healing protective film on an Fe surface was attempted. A protective film of 1,2-bis(triethoxysilyl)ethane ([C2H5O]3 Si[CH2]2 Si[OC2H5]3) polymer containing a fine powder of ammonium heptamolybdate tetrahydrate ([NH4]6Mo7O24·4H2O) was prepared on a surface of Fe electrode passivated…
The structural transformations of flavylium ion in aqueous solutions caused by pH jumps and photoexcitation have been investigated. At pH < 1, the stable form is the colored cationic species (AH+). By increasing pH, the concentration of AH+ decreases and, at pH = 5, this form is no longer present. The species obtained…
High performance phase change optical recording disk has been developed by using an oxygen-doped Ge–Sb–Te recording layer. The 5×105 overwrite cycles were achieved with this 6 at. % oxygen-doped phase change optical recording disk. The transmission electron microscope observation shows that the crystal grain size was…
GaAs when exposed to a 7 V anodic bias in aqueous HCl, forms pitted structures from which visible photoluminescence has been observed. Previous work in our laboratory identified the source of the luminescence to be arsenic oxide microcrystals, formed during the electrochemical oxidation, which evolve in composition an…
The dipole moments, dipole polarizabilities, and the first and second hyperpolarizabilities of the Group IIb sulfides have been calculated by using different high-level-correlated methods and including both the relativistic and vibrational contributions. The electron correlation effects have been studied at the levels…
The bulk chemical composition, mineral chemistry and clay mineralogy of soils developed on granodiorite parent materials were investigated in Yosemite National Park in the Sierra Nevada, CA. The soils studied were developed on glacial moraines estimated to be ∼20 Ka (Tioga), ∼130 Ka (Tahoe) and ∼300 Ka (pre-Tahoe) in…
We report on a light-induced phenomenon in dye-doped liquid crystals (LCs) with the distinctive features of molecular transport and assembly at micron scales. Under single-beam laser irradiation, the dye molecules phase separate from the LC host and assemble onto the cell substrate. Although the intensity of incident…