Materials Literature
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Through-tool coolant was applied to the drilling of an aluminum/SiC MMC. Titanium nitride coated, solid carbide drills were used to investigate the effect of the coolant application method on the performance of the drilling operation. Holes were produced dry, with conventional coolant and with through-the tool coolant…
In order to investigate the electronic characteristics of ferroelectric thin films that behave as semiconductors, we derive an equation to calculate the band bending in ferroelectrics, to replace the Poisson equation. We find that the space-charge density term, , in the Poisson equation should be replaced by - P r , w…
Antimicrobial additives can be successfully incorporated into food packaging films or film coatings. However, several factors affect their effectiveness for inhibition of spoilage or pathogenic microorganisms. Nisin was coated onto low density polyethylene film using a cellulose based coating. It inhibited growth of S…
This article examines the separation of lysozyme from chicken egg white by ultrafiltration with 25 kDa and 50 kDa MWCO polysulfone membranes. The effects of pH, system hydrodynamics, feed concentration, and transmembrane pressure on permeate flux, lysozyme transmission, purification factor, and productivity have been…
Poly(propylene imine) dendrimers have been functionalized with π-conjugated oligo( p -phenylene vinylene)s (OPV's) through an amide linkage and are fully characterized. In solution the dendrimers behave as globular entities without specific interactions between the OPV units. The OPV dendrimers have an amphiphilic nat…
The calculations are performed for a broad range of the properties of Ca and Sr in the fcc and bcc phases. A detailed information on the magnitude and character of temperature dependence of anharmonic effects in the lattice dynamics over the entire Brillouin zone (frequency shifts and phonon damping, Gruneisen paramet…
For the single-wall carbon nanotubes conducting in the simplest tight binding model, the complete set of line group symmetry based quantum numbers for the bands crossing at Fermi level are given. Besides linear (k), helical (k'} and angular momenta, emerging from roto-translational symmetries, the parities of U axis a…
The full geometrical symmetry groups (the line groups) of the monolayered, 2Hb and 3R polytypes of the inorganic MoS2 and WS2 micro- and nanotubes of arbitrary chirality are found. This is used to find the coordinates of the representative atoms sufficient to determine completely geometrical structure of tubes. Then s…
Using the activation-relaxation technique (ART), we study the nature of relaxation events in a binary Lennard-Jones system above and below the glass transition temperature (T_g). ART generates trajectories with almost identical efficiency at all temperature, thus avoiding the exponential slowing down below T_g and pro…
The lanthanide and Th4+ complexes with calix[4]arene ligands substituted either on the narrow or at the wide rim by four coordinating groups behave totally differently as shown by an NMR investigation of the dia- and paramagnetic complexes. Solutions of complexes were prepared by reacting anhydrous metal perchlorate s…
Methane activation in the absence of molecular oxygen over metallo-catalysts has been recognized as a potential catalytic process. In the present study, the density-functional theory (DFT) is employed to theoretically explore the mechanism of the nonoxidative dehydrogenation of methane on acid-promoted metal (Mo or W)…
The relative proportions of genetically distinct collagen types in connective tissues vary with tissue type and change during disease progression, development, wound healing, aging. This study aims to 1) characterize the spectro- temporal fluorescence emission of fiber different types of collagen and 2) assess the abi…
This paper describes the preparation of an aqueous dispersion of electrostatically stabilized gold nanocrystals. It also describes the characterization of these nanocrystals by NMR, SAXS, SLS, and TEM prior to and following their modification by chemisorption of 3-mecaptopropanoic acid. Using the insights gained, thes…
This paper describes the formation and characterization of nanosize needle-shaped In(OH) 3 particles. The In(OH) 3 nanopowder was prepared via the sonication of an aqueous solution of InCl 3 at room temperature and at 0 °C. At these temperatures, nonsonicated hydrolysis does not occur. The role of the ultrasound radia…
This paper discusses the influence of electron scavengers (such as oxygen) on the emission properties of colloidal suspensions of nanocrystalline ZnO particles. Emission measurements are performed on deaerated suspensions of ZnO particles in alcohols (2-propanol and ethanol) and other organic solvents (DMF and propyle…
UDP-galactose 4-epimerase catalyzes the interconversion of UDP-glucose and UDP-galactose during normal galactose metabolism. In humans, deficiencies in this enzyme lead to the complex disorder referred to as epimerase-deficiency galactosemia. Here, we describe the high-resolution X-ray crystallographic structures of h…
Multiscale phenomena which include several processes occuring simultaneously at different length scales and exchanging energy with each other, are widespread in magnetism. These phenomena often govern the magnetization reversal dynamics, and their correct modeling is important. In the present paper, we propose an appr…
Monte Carlo statistical mechanical computer simulations of the electric-field poling of second-order nonlinear optical chromophores, characterized by large dipole moments, polarizabilities, and hyperpolarizabilities, are presented. Such theoretical analysis is critical to defining the structure/function relationships…
Porous silica-pillared H + -magadiites were prepared by intragallery amine-catalyzed hydrolysis of TEOS [tetraethylorthosilicate, Si(OC 2 H 5 ) 4 ]. Mixtures of the H + -magadiite, dodecylamine, and TEOS at molar ratios of 1:2:15−30 and 1:2−10:20 resulted in swollen and viscous gel once at room temperature, allowing i…
A study of the physical, mechanical and corrosion resistant properties of all the most common commercially available plastics and elastomers. It offers examples of typical applications and describes methods of joining. The physical, mechanical and corrosion resistant properties of 32 thermoplastics, 20 thermosets, and…