Materials Literature
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This paper is an attempt to highlight the problems faced by industrial rheologists. The problems are far more complex than subjects of usual academic pursuit. Because of the lack of scientific methods in both theory and instruments, the industrial rheologist often resort to empirical approach such as a use of the proc…
Immobilization and solidification of polluting waste, introduced into the industrial sector more than 20 years ago, and throughout last 10 years is being the object of a growing interest for engineers and environment scientists, has become a remarkable standardized process for treatment and management of toxic and haz…
In the field of methodologies for color studying, a research of it has been done on colored mortars by applying uv-vis spectrophotometry, instrumental technique which can be used for solid materials works, and previously applied to building materials study. Results obtained show that the mentioned technique permits to…
A rapid two-step extraction method for high quality fungal chitosan from Absidia glauca was developed. Fungal mycelia are autoclaved in a 1M caustic soda solution at 121C for 15 min. The alkali-insoluble-materials obtained are then further autoclaved for 15 min in a 2% aqueous acetic acid solution. There was a relativ…
Silicon-based dielectrics (SiO 2 , Si 3 N 4 , SiO x N y etc.) have been widely used as the key dielectrics in the manufacturing of silicon integrated circuits (ICs) and virtually all other semiconductor devices. Dielectrics having a value of dielectric constant k × 8.854 F/cm more than that of silicon nitride (k >…
Longitudinal wave propagation is controlled using shape memory inserts placed periodically along rods. The inserts act as sources of impedance mismatch with tunable characteristics. Such characteristics are attributed to the unique behavior of the shape memory alloy whereby the elastic modulus of the inserts can be va…
This study aims ultimately to quantify the force needed to penetrate human tissue. The results will reduce the subjectivity of expert opinion in stabbing incidents. They will also aid clinicians in assessing the severity of injury and help prevent the unnecessary deaths which can occur when this is not fully appreciat…
A comparative investigation of catalytic activity of different polyazines in NADH electrooxidation is reported. The structure of azine monomers taken for electropolymerization was varied systematically changing both the second heteroatom and the substituents of aromatic rings. It was found that the monomer structure a…
Sorbitan monostearate, a hydrophobic nonionic surfactant, gels a number of organic solvents such as hexadecane, isopropyl myristate, and a range of vegetable oils. Gelation is achieved by dissolving/dispersing the organogelator in hot solvent to produce an organic solution/dispersion, which, on cooling sets to the gel…
We prepared epitaxial ferromagnetic manganite films on bicrystal substrates by pulsed laser ablation. Their low- and high-field magnetoresistance (MR) was measured as a function of magnetic field, temperature and current. At low temperatures hysteretic changes in resistivity up to 70% due to switching of magnetic doma…
(accepted for publication in Macromolecules) The distance-resolved effective interaction between two star polymers in a good solvent is calculated by Molecular Dynamics computer simulations. The results are compared with a pair potential proposed recently by Likos et al. [Phys. Rev. Lett. 1998, 80, 4450] which is expo…
The crystallographic (charge-ordered) and magnetic superstructures of ${\mathrm{La}}_{0.333}{\mathrm{Ca}}_{0.667}{\mathrm{MnO}}_{3}$ were studied by high-resolution synchrotron x-ray and neutron powder diffraction. In the antiferromagnetic structure, which was refined using a noncollinear model, the a lattice paramete…
The magnetoresistance (MR) in polycrystalline colossal magnetoresistive compounds follows a behavior different from single crystals below the ferromagnetic transition temperature. This difference is usually attributed to spin-polarized tunneling at the grain boundaries of the polycrystalline sample. Here we derive a t…
Five single crystals of Y(3)Al(5-x)Ga(x)O(12) (0 </= x </= 5) garnet solid solutions with the compositions x = 0.0, 1.0, 2.0, 3.0 and 4.0 were synthesized using a flux method. The compositional dependence of the lattice constants of the garnet solid solutions shows a large deviation from Vegard's law. Investigation of…
Nanostructured transition metal clusters and colloids have various potential applications, their properties depending on the particle size, which ranges from 1 to 10 nm. Here is described a new way to prepare transition metal colloids size-selectively by simply varying the redox properties of a particular class of red…
The oxidation of BN composite interphases was examined with a series of model materials. Oxidation was examined in both low‐water‐vapor (∼20 ppm H 2 O/O 2 ) environments at 900°C and high‐water‐vapor (1% and 10% H 2 O/O 2 ) environments at 700° and 800°C. The low‐water‐vapor case was explored with layered BN/SiC mater…
The stability of Gd‐doped and La‐doped in water‐containing atmospheres was examined. Samples containing up to 20 mol % Gd and 30 mol % La were synthesized by calcining the requisite mixtures of precursors. Three types of tests were performed: ( i ) thermal treatment in an atmosphere containing water vapor between 150…
The oxidation state of alumina- and titania-supported Ru catalysts has been investigated as a function of reduction temperature, as well as by following the interaction with a methane−oxygen mixture at 773 and 973 K, employing XPS and FTIR techniques. It is found that the chemical behavior of Ru depends strongly on th…
Material Cultures: Why Some Things Matter. Daniel Miller. ed. Chicago: University of Chicago Press, 1998. 244 pp.