Materials Literature
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In hexaferrites of the composition SrFe/sub 12/O/sub 19/ (SrM), Sr was substituted by R = La, Sm, and Nd. The precursors were weighed according to different Sm/sup 3+//Sr/sup 2+/ ratios (n = Sm/sup 3+//Sr/sup 2+/), where n was varied between 1/16 and 1/2. The samples were produced by hydrothermal synthesis. The effect…
An attempt is made to identify the acoustical characteristics of textile materials using precision woven monofilament fabrics as model textiles. The experiments try to eliminate the effect of entrapped air pockets in the fabric on an ultrasound wave field. The results of the experiment reveal that the power consumptio…
The objective of this work is to describe the dynamic thermal behaviour of thermoelectric generators and refrigerators. In practical situations, these devices work under transient operating conditions due to the time change in the imposed current, voltage, and hot or cold temperatures. Results for transient temperatur…
A review of coordination compounds of several metals (Co2+, Ru2+, Zn2+, Al3+, Y3+, Ln3+ = La, Gd, Yb, Lu) with tetra-crown-substituted phthalocyanine H2R4Pc (R4Pc2− = [4,5,4′,5′,4′′,5′′,4′′′,5′′′-tetrakis(1,4,7,10,13-pentaoxotridecamethylen)phthalocyaninate-ion]) has been presented. The syntheses of compounds with a g…
T he bac teri a- resi st propcrti es of vario us natura l medicinal products. like e lovc o il. neem o il , tul si oi l and karanj a oil, havc been studi ed. Among th ese prod uc ts, the c love and neem o il s s how good a nti -bactcri a l property ; c love o il shows cxccll ent anti-bac terial property o n COllon fab…
Abstract The corrosion process of carbon steel in soil has been investigated, in particular the influence of the soil of an urban environment. A field test was carried out with test panels buried in trenches. Localized and uniform corrosion rates were evaluated after 1 and 3 years. Soil samples from points adjacent to…
This paper presents the influence of the large motor starting and the large rolling mill operation on the isolated integrated steel cogeneration facility by executing the transient stability analysis. The system configuration of the steel facility is introduced first. Furthermore, the proper mathematical models and th…
Abstract In industrial textile pre-treatment and finishing processes, mass transfer and mass transport are often rate-limiting. As a result, these processes require a relatively long residence time, large amounts of water and chemicals, and are also energy-consuming. In most of these processes, diffusion and convectio…
Stress is one of the principal external factors affecting the magnetization of materials. A new and improved equation for modeling the magnetomechanical effect has been developed based on an extension of the previous law of approach equation to include terms that are analogous to those in the Rayleigh law. Accordingly…
Abstract Intramolecularly hydrogen bonded hemiindigo compounds 2–4 were prepared and their photochemical behavior was investigated. Z-2 did not undergo isomerization, while 3 underwent isomerization mutually between the Z-isomer and E-isomer in solution to exhibit a color change between greenish yellow and reddish ora…
Abstract The melt flow behavior of thermoplastic elastomers from nylon and nitrile rubber (NBR) was studied as a function of blend ratio, dynamic crosslinking, compatibilization and temperature. The morphology of the extrudates, i.e., the size, shape and distribution of the domains, was analyzed. Uncompatibilized and…
The average effective thermal conductivity K eff is measured for forty-eight multilayered needle-punched nonwoven samples. Samples are produced using glass and ceramic fibers layered in several different constructions and punched with needles with varying numbers of barbs. The thermal conductivities are determined at…
Abstract— Splash‐form tektites are generally acknowledged to have the form of bodies of revolution. However, no detailed fluid dynamical investigation of their form and stability has yet been undertaken. Here, we review the dynamics and stability of spinning, translating fluid drops with a view to making inferences co…
The citrate synthase of Escherichia coli is an example of a Type II citrate synthase, a hexamer that is subject to allosteric inhibition by NADH. In previous crystallographic work, we defined the NADH binding sites, identifying nine amino acids whose side chains were proposed to make hydrogen bonds with the NADH molec…
Abstract Chlorinated poly(vinyl chloride) (CPVC) shows reductions in flammability and smoke production over PVC. The thermal decomposition of pure CPVC (without stabilizer or lubricant) was studied by dynamic thermogravimetric analysis (TGA) at heating rates from 5 to 100°C/min in atmospheres of nitrogen, air, and oxy…
Abstract In an extensive study the role of the alloying elements in commercial alloys for corrosion resistance was studied in air without and with 0.1 and 2 vol.% Cl 2 , respectively. In the first part of this paper [1] the thermodynamic fundamentals were discussed on the basis of the new concept of the quasi‐stabilit…
A finite element simulation of stress evolution in thin metal film during electromigration is reported in this paper. The electromigration process is modeled by a coupled diffusion- mechanical partial differential equations (PDEs). The PDEs are implemented with a plane strain formulation and numerically solved with th…
Two variations of the liquid extrusion technique for pore structure analysis have been analyzed and results obtained using nonwoven materials have been discussed. Strengths and limitations of the techniques have been evaluated. The techniques can measure all the important pore characteristics of nonwovens without usin…
The influence of σphase on mechanical properties in type ER309L stainless steel has been investigated by small punch test. The SA508 cl.3 reactor pressure vessel steel plates were overlay-cladded with the type ER309L welding consumable with different heat input rates. The microstructure of the clad was composed of fcc…
Abstract An impinging‐jet crystallizer was investigated in this work to assess its operational sensitivity and reproducibility for the production of small, monodisperse crystals using calcium oxalate, a model system capable of forming multiple hydrates. The impinging‐jet mixer provides rapid mixing of the reactant sol…