Materials Literature
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Composites of polypropylene filled with untreated and treated calcium carbonate (CaCO3) have been prepared. The surface modification of calcium carbonate was done by using titanate coupling agent. The effect of this treatment on the interfacial adhesion and the dispersion of filler particles in the polymeric matrix wa…
Bulk and low molecular weight (LMW) (<1 kDa) water-extractable carbon were collected from fresh and microbially degraded wheat straw (Triticum aestivum L.) and crimson clover (Trifolium incarnatum L.) residues to monitor early-stage humification over an 8-wk incubation. Copper complexation parameters were determined f…
Abstract The phenomenon of storage hardening in solid natural rubber (NR) is presumed to occur by means of reactions between some non-rubber components and abnormal groups in rubber molecule. The main non-rubber constituents in NR are composed of proteins and lipids. The storage hardening behavior of NR purified by en…
Base metal technology, mainly using Ni electrodes in multilayer ceramic capacitors (MLCCs), is now well established. This technology requires a so‐called reoxidation treatment after sintering the MLCCs in a reducing atmosphere to guarantee a sufficient electrical reliability. Large numbers of electrodes, and productio…
Abstract In this paper, the thermal conductivity and thermal diffusivity of nine polymers were measured by using the transient short‐hot‐wire method. The corresponding specific heat was measured with a commercial Differential Scanning Calorimeter (DSC). The effects of temperature on the thermal conductivity, thermal d…
BACKGROUND AND AIM OF THE STUDY: Rejection is thought to contribute to the degeneration of valved homografts. A novel cryopreserved decellularized homograft valve (SynerGraft; CryoLife, Inc.) offers the unique opportunity to gain new insight into the immunology of homograft implantation and its significance for valve…
The aim of this paper is to present an innovative one-dimensional photonic bandgap structure on plastic substrate, for electromagnetic field shielding applications in the radio frequency range. A complete study is performed, from material characterization and design, to fabrication and experimental test of a prototype…
A green-colored clay mineral occurring on the walls of amygdaloidal cavities and along fractures in the Deccan flood basalts at Killari, Maharashtra, India has been identified as iron-rich saponite, with chemical composition (Na 0.60 K 0.04 Ca 0.47 )(Mg 2.05 Fe 2+ 3.95 )(Si 6.45 Al 1.55 )O 20 (OH) 4 . The XRD data of…
A soluble photoreactive polyimide (PSPI) bearing the coumarin (COU) chromophore in the side group, 6F-HAB-COU PSPI, was successfully synthesized with a high molecular weight. Good quality films of this PSPI were obtained using a conventional solution spin-casting and drying process. 6F-HAB-COU PSPI was determined to b…
The particle size distribution polydispersities of a number of macro- and mini-emulsion latexes are reported. In cases where the macro-emulsion and mini-emulsions were produced under very nearly identical conditions, the mini-emulsion will have a polydispersity equal to, or only very slightly greater than, the equival…
Abstract In an ultrasonic processor, the input electrical energy undergoes many transformations before getting converted into the cavitation energy, which is dissipated in the medium to bring out the physical/chemical change. An investigation of the influence of free and dissolved gas content of the system on the effi…
Abstract Block copolymers were synthesized by ring‐opening polymerization of L ‐lactide or D ‐lactide in the presence of mono‐ or dihydroxyl poly(ethylene glycol), using zinc metal as catalyst. The resulting copolymers were characterized by various techniques, namely 1 H NMR spectroscopy, differential scanning calorim…
In this, the last of a series of three papers, we discuss a method of forming iron phosphate ceramics by a reduction process. We report the formation of iron oxide ceramics by reducing hematite with iron in a phosphoric acid solution. The reaction results in a rapid‐setting ceramic (at room temperature) with a compres…
Abstract: Impact tensile properties of three different wrought magnesium alloys (AZ31B‐F, AZ61A‐F and ZK60A‐T5) are evaluated using the split Hopkinson bar. Reliable tensile stress–strain data up to fracture in the extrusion direction at strain rates of nearly 1000 s −1 are presented and compared with those at quasi‐s…
Phase transitions in Ti-6Al-4V were studied by means of high temperature X-ray diffraction using a resistance heated furnace in high vacuum and Cu Kα radiation. The α and β phases could be observed conveniently using the (10.0), (00.2) and (10.1) peaks of the α structure and the (110) peak of the β. The phase composit…
Four species of biraphid pennate diatoms (Craticula cuspidata (Kützing) D.G. Mann, Stauroneis phoenicenteron (Nitzsch) Ehrenberg, Nitzschia linearis (Agardh) W. Smith, and Pinnularia viridis (Nitzsch) Ehrenberg) were studied to determine the effect of temperature changes on their motility and adhesion to the substratu…
PURPOSE: To evaluate the imaging potential of ferumoxytol, a new superparamagnetic iron oxide colloidal blood pool contrast agent. MATERIALS AND METHODS: Magnetic resonance (MR) imaging at 1.5 Tesla was performed before and after intravenous injection of ferumoxytol using escalating doses of 0.4, 0.8, 1.2 and 1.6 mg F…
Precise and accurate knowledge of the optical properties of amorphous silica is important because of the increasing application of SiO 2 in optical and electrooptical devices, including photolithography masks for semiconductor fabrication, recently as a potential 157 nm mask substrate. The optical properties in the va…
We have previously reported that L-proline has cryoprotective activity in Saccharomyces cerevisiae. A freeze-tolerant mutant with L-proline accumulation was recently shown to carry an allele of the PRO1 gene encoding gamma-glutamyl kinase, which resulted in a single amino acid substitution (Asp154Asn). Interestingly,…
This is the second of three papers on a dissolution model that describes the formation of chemically bonded phosphate ceramics. In this paper, we discuss the kinetics of formation of aluminum phosphate ceramics between 100° and 150°C. Using basic thermodynamic formulations, we calculated the temperatures of maximum so…