Materials Literature
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Eight-coordinate hydroxypyridinone/terephthalamide GdIII complexes display high relaxivities due to their two inner sphere water molecules. This relaxivity can be further increased by functionalizing the terephthalamide moiety with an amine. A significant hydrogen bonding interaction between the amine and another wate…
Abstract A controlled drug release has been obtained from hybrid organic–inorganic mesoporous silica carriers under in vitro conditions. The control of drug release rate can be ascribed to the incorporation of different hydrophobic functional groups.
Using the general coupled-mode formulation, it is shown that the interaction between a regular transmission line and a negative-refractive-index (NRI) line leads to complex coupled modes. Specifically the coupling between a regular microstrip (MS) and a NRI line is analyzed and the theory reveals conditions giving ris…
Previous studies have shown good adsorption of volatile organic compounds (VOC) present in air onto activated carbon fiber cloths (ACFCs). In a chemical plant, a treatment process was carried out to control a gaseous emission (flow close to 100 m3 h−1) loaded with methylene chloride at concentrations ranging between 3…
An advanced bottom electrode contact (BEC) was successfully developed for reliable high-density 256 Mb phase-change random access memory (PRAM) using a ring-type contact scheme. This advanced ring-type BEC was prepared by depositing very thin TiN films inside a contact hole, after which core dielectrics were uniformly…
The orientation of cellular alignment in smooth muscle tissue engineering is directly related to optimal movement of engineered tissue when it is transplanted in vivo. Cyclic mechanical strain has been applied to modulate the alignment, proliferation, and differentiation of smooth muscle cells. This study was conducte…
Modification of titanium via surface-initiated atom transfer radical polymerization (ATRP) was carried out. The surface of the titanium foil was activated initially by a silane coupling agent containing the ATRP initiator, benzyl chloride. Well-defined polymer brushes of poly(ethylene glycol) methacrylate (PEGMA), (2-…
In natural and man-made environments, microbial communities thrive as biofilms on living (e.g. tissue) and inanimate (e.g. plastic, metal, wood, mineral) surfaces. Biofilms are found in a wide range of aqueous habitats, including physiological fluids. Numerous types of microorganisms are able to colonize catheters, im…
Cr 2 Al C is a recently developed layered ternary carbide. In this work, the atomic scale microstructure is reported. The layer stacking sequence of Cr and Al atoms has been clearly resolved. The atomic scale characterizations were realized by means of high resolution transmission electron microscopy and Z-contrast sc…
The effect of the diameter of an insulator covered with ice on its flashover voltage was investigated. The insulator diameter was simulated and varied by controlling the width of a layer of ice artificially accreted on a short string of 5 IEEE standard units. The 50% withstand voltage (V/sub 50/) was experimentally de…
Nanocrystalline Ni‐1.7%Co alloy exhibited high ultimate tensile strength of about 1600 MPa and enhanced ductility of 8‐9.6% over a wide strain rate range of 1.04 × 10 –6 –1.04 s –1 revealed by tensile tests at room temperature. The typical tradeoff characteristic between yield stress and elongation to failure would ma…
Two new vanadates, Ba(2.5)(VO2)3(SeO3)4.H2O and La(VO2)3(TeO6).3H2O, have been synthesized by hydrothermal methods using BaCO3, Ba(OH)2.H2O, La(NO3)3.6H2O, V2O5, TeO2, and H2SeO3 as reagents. The structures were determined by single-crystal X-ray diffraction. Ba(2.5)(VO2)3(SeO3)4.H2O exhibits a two-dimensional layered…
Electrical properties of plasma-enhanced chemical vapor deposited carbon nanofibers (CNFs) are characterized with measurements over a broad temperature range (4-300 K). Temperature-dependent measurements of CNF via resistivity reveal a behavior resembling the mixture of graphite a-axis and c-axis transport mechanisms.…
Metal–ferroelectric–insulator–semiconductor (MFIS) field-effect transistors with$hboxPb(hboxZr_0.53, hboxTi_0.47)hboxO_3$ferroelectric layer and dysprosium oxide$hboxDy_2hboxO_3$insulator layer were fabricated. The out-diffusion of atoms between$hboxDy_2hboxO_3$and silicon was examined by secondary ion mass spectromet…
The objective of this study was to assess the in vitro release kinetics and the in vivo angiogenic effect of human vascular endothelial growth factor (VEGF)-activated poly(DL-lactide-co-glycolide) (PLGA) sponge. The highly porous sponges (each 3 x 4 x 4 mm(3)) were activated by soaking in a VEGF solution (2.5 or 5.0 m…
A phenylethynyl-terminated imide oligomer having pendent phenylethynyl groups (20 mol%) was synthesized using a novel pendent diamine, 2,4-diamino-1-(1-fluoro-4-phenylethynylphenoxy) benzene. The imide oligomer exhibited excellent solubility in NMP and solutions up to 40% solids were obtainable. A detailed cure study…
This Note presents a time-integration strategy for computing the evolution of structures embedding shape-memory alloys in a thermomechanical setting. A variational formulation is associated with the scheme proposed, which allows one to study the existence and unicity of solutions depending on the material model consid…
Side-chain Interactions Governing the Pairing of Half-cystine Residues in Ribonuclease (Haber, E., and Anfinsen, C. B. (1962) J. Biol. Chem. 237, 1839–1844) Christian Boehmer Anfinsen, Jr. (1916–1995) was born in Monessen, Pennsylvania, a small town just south of Pittsburgh. In 1933, he enrolled at Swarthmore College…
Design of ship plates against underwater explosion is a mandatory requirement of warship construction. While non-contact underwater explosions of small intensity induce dynamic stresses that die with time, moderate intensity causes permanent or inelastic deformation, and severe intensity leads to rupture. The intensit…
Abstract Well ordered kaolinite was isostatically and uniaxially pressurized up to 13,200 kg/cm 2 for 10 min in dry conditions and the effects of pressure on kaolinite order were determined by analyzing the shapes of two-dimensional diffraction bands on X-ray powder diffraction patterns. Increased pressure decreased t…