Materials Literature
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ABSTRACT Corn is one of the most important food and industrial crops in the United States. Zein constitutes about half of the endosperm proteins in corn. Potential applications of zein include use in fibers, adhesives, inks, cosmetics, textiles, and chewing gum. Recently, attempts have been made to utilize zein for fo…
A multi-frequency (X, Q, and W band) electron paramagnetic resonance (EPR) study of Cr-doped PbTiO3 micro- and nanopowder samples was performed. Three Cr3+ centres were identified in tetragonal phase samples with different axial Zero Field Splitting (ZFS) parameters, C1, C2, and C3. The centre C1 is similar to that ob…
0.2 Sr 0.8 Fe 0.55 Ti 0.
Nickel oxide (NiO) thin films have been deposited by reactive rf sputter deposition under O 2 ∕ Ar flow ratios of 1 ∕ 3 and 3 ∕ 1 . Negative electric bias was applied on the substrates during film deposition. The current-voltage characteristics measured on the copper substrate holder showed that the ions in the O 2 ∕…
In this contribution we will discuss the preparation of nanocrystalline lithium niobate using a variety of methods, including both ball-milling and sol-gel methods. For samples prepared by the different routes we report (i) 7Li NMR spectroscopy results and Nb K-edge EXAFS spectra. We will show that the preparative rou…
Fast fracture properties of chemically vapor-infiltrated silicon carbide matrix composites with Hi-NicalonTM Type-S near-stoichiometric silicon carbide fiber reinforcements and thin pyrolytic carbon interphase were studied. The primary emphasis was on preliminary assessment of the applicability of a very thin pyrolyti…
A well-exfoliated morphology is usually observed for polar polymer/clay nanocomposites via dynamic melt processing techniques, whereas only an intercalated or a partially intercalated/partially exfoliated morphology is often obtained for nonpolar polymer/clay nanocomposites, even though some polar compatibilzer is use…
An experimental study of the non-Fourier behavior in porous media due to short time thermal perturbation is presented. The governing energy equation is formulated based on the two-equation model and the non-Fourier heat conduction model. This formulation leads to the emergence of three thermal lag times. These paramet…
Poly(amide)-6/clay nanocomposites are investigated by means of modulated temperature differential scanning calorimetry. The importance of polymer–filler interaction is explored by comparing nanocomposites based on untreated and organically modified clay. During quasi-isothermal crystallization experiments, an excess c…
One of the most important problems in a thermoelectric refrigerator is the need for considerable heat dissipation from the hot side of Peltier pellets, because the heat flow per unit area on this side is very high (∼40 kW/2). In this work, a study and an improvement of the fins to dissipate heat from the hot side have…
Phymatotrichum root rot, caused by the fungus Phymatotrichum omnivorum, is a serious and destructive diseasethat significantly reduces cotton yield and lowers lint quality. Cultural practices are commonly recommended for the controlof cotton root rot, and fungicides and fumigants that may suppress the disease have als…
A series of zeolite-type silicates containing framework lanthanides and termed Ln-AV-9 have been synthesized. Fundamentally different from conventional zeolites, these materials have the composition (Na4K2)(Ln2Si16O38)·10H2O (Ln = Nd, Sm, Eu, Tb, Gd, Dy). 29Si and 23Na MAS NMR spectra of Sm-AV-9 indicate the presence…
The effects of carbon and nitrogen on the creep strength and microstructure of precipitation-strengthened 15Cr ferritic steel have been investigated. The creep rupture lives of 15Cr ferritic steel with the addition of 0.07mass%N and with a combination of 0.05mass%C and 0.03mass%N were extended longer than that of the…
Article Chemical Degradation of Cellulose in Paper over 500 Years was published on September 1, 2005 in the journal Restaurator. International Journal for the Preservation of Library and Archival Material (volume 26, issue 3).
The characteristics of a new-type of ozone-generating electrode with a catalyst layer fabricated by thermal decomposition were investigated. The catalyst layer consisted of insulating tantalum oxide and metallic platinum. Ozone generation was observed when the concentration of Ta of the catalyst layer was 70% and abov…
EBSP (electron backscattering pattern) analysis was performed on microstructure of three β titanium alloy specimens after cold working to study peculiar plastic behavior of the multifunctional alloy, Gum Metal. The specimens employed were Ti-36%Nb-2%Ta-3%Zr-0.3%O (mass%) alloy (Gum Metal) and two reference alloys havi…
Evidence of a relationship between activation energies and enthalpy changes of various dissociation reactions on transition metals has been reported recently. A reconsideration of density functional theory results for dissociation energies of oxygen and NO on different rhodium surfaces (low-index and stepped) and thei…
A liquid crystal (LC) anamorphic lens is realized using an LC cell with a transparent electrode and a divided electrode with a hole in the center. By applying appropriate potentials on the divided electrode, the LC cell behaves like an optical lens with astigmatic properties. An incident plane lightwave experiences a…
Alkyl monolayer modified porous silicon functional surfaces are employed for selective binding of proteins from complex mixtures (through washing of the deposited mixture spot using appropriate buffer) and MALDI-MS is used to detect the components retained on the surface.
Abstract Density functional calculations at the B3LYP/6‐31G* level were performed for perylene tetracarboxylic dianhydride (PTCDA) and its potential derivatives modified by replacing the two anhydride ether groups with B‐, N‐, S‐, and Se‐containing groups, as well as for perylene monomer and dimer structures. The pred…