Materials Literature
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Abstract A new linear chain complex of oxo‐centered trinuclear manganese clusters, [{Mn III 2 Mn II O(O 2 CCHCl 2 ) 6 (H 2 O)}{Mn(O 2 CCHCl 2 ) 2 (H 2 O) 4 }] n ( 1 ), has been synthesized by treatment of a mixture of Mn(OAc) 2 ·4H 2 O and dichloroacetic acid in dichloromethane with KMnO 4 . In this complex chains are…
This paper is a case study examining the cause, effect, and solution of an actual "noncharacteristic" even harmonic problem in an electrochemical plant. While issues concerning "characteristic" harmonics are well documented in the literature, limited information is available describing how noncharacteristic harmonic c…
Several poly(alkoxyphosphazenes) and poly(fluoroalkoxyphosphazenes) were synthesized and allowed to react with various organic nucleophiles. Reactions were carried out at room temperature (25 °C) and at 67 °C in tetrahydrofuran (THF) and were monitored by 31 P NMR spectroscopy. The possible use of single-substituent p…
Abstract A straightforward experimental set‐up derived from the Biometer Flask previously utilized for experiments of pesticides biodegradation, has been adopted for testing the ultimate biodegradability of natural, synthetic and semi‐synthetic polymeric materials on solid substrates such as soil and mature compost. T…
Abstract A 5,7‐dioctadecylquinoxalinophenazine zwitterion 1 has been investigated to determine its thermal phase behavior. A combination of differential scanning calorimetry (DSC), variable temperature low‐ and high‐angle X‐ray diffraction (XRD), and deuterium solid‐state NMR spectroscopy were used to characterize the…
Se0.9In0.1 samples were prepared from their highly pure constituents, by ice-water quenching from the melts. Structural characterization using XRD and DTA has revealed a stable phase consisting of some crystalline clusters embedded in a glassy matrix with a single glass transition (Tg) at a temperature 320 K, an onset…
A renewed interest in thorium-based fuels has arisen lately based on the need for proliferation resistance, longer fuel cycles, higher burnup, and improved waste form characteristics. Recent studies have been directed toward homogeneously mixed, heterogeneously mixed, and seed-and-blanket thorium-uranium oxide fuel cy…
Nanocrystalline aluminum nitride powders obtained from gas condensation and in situ nitridation in a forced‐flow reactor have been sintered successfully without pressure or additives. The resulting densified pellets showed good thermal conductivity and low oxygen content. A comparison of the improvement in densificati…
PURPOSE: To determine whether combined intravenous liposomal doxorubicin and radio-frequency (RF) ablation decreases tumor growth and increases endpoint survival over those with RF or liposomal doxorubicin alone in an animal tumor model. MATERIALS AND METHODS: Subcutaneous R3230 mammary adenocarcinoma (1.1-1.4 cm) was…
Thin films of polypropylene have been irradiated with different doses of gamma radiation from a 60Co source. IR, UV-VIS spectra of this polymer before and after irradiation have been recorded and from the spectral data some modifications in the properties have been investigated. The spectra indicated that polypropylen…
Composites consisting of icosahedral (i) phase and ductile α-Mg can be fabricated by controlling the alloy composition. With increasing Mg content, the primary solidification phase changed from the i phase to the α-Mg phase and single eutectic structure can be obtained at a composition of Mg72Zn23.5Y3.5. The i phase s…
Mechanical properties of silicon carbide composites reinforced with highly crystalline fibers and fabricated by the chemical vapor infiltration method were evaluated. Materials used were SiC/SiC composites reinforced with unidirectional Hi-Nicalon Type-S fibers and unidirectional Tyranno SA fibers with various fiber/m…
Abstract An all‐solid actuator, consisting of a polyaniline (PANI) film and a solid polymer electrolyte (SPE) of poly(ethylene oxide) derivative (STO288), clearly showed a reversible displacement in an atmosphere when a voltage was applied between the PANI film and the SPE layer. The displacement and the response rate…
At neutral-grounded substations, ferroresonance may happen upon switching a circuit breaker or disconnector, due to the saturated magnetizing characteristics of the bus PT. In this paper, a systematical method is presented to analyze and suppress the phenomenon. The scheme for suppressing the ferroresonance is to inse…
A procedure for the preparation of high-quality single crystals from concentrated glyme mixtures is presented. Anhydrous single crystals of LiNO(3) and LiClO(4) were prepared in this manner, and the single-crystal structure of LiClO(4) (orthorhombic, Pnma, a = 8.6447(12) A, b = 6.8512(10) A, c = 4.8254(7) A, Z = 4) wa…
Liquid-crystal phases are typical examples of soft and complex materials that exhibit an abundance of different phenomena. In this paper we present some of our results contributing to the understanding of the physics of defects in nematic liquid crystals. The examples presented exhibit many features that are also of i…
This paper is a review of the present status of research activities on the divertor and the first wall for fusion power plants in Japan. There are several key issues as follows; 1) plasma facing materials, 2) fabrication techniques, 3) thermal hydraulics, and 4) component design. It can be said that solid surface plas…
We have fabricated a light-emitting diode on a Si(100) p+ substrate operating at room temperature close to 1.6 μm. The growth of the structure was performed by molecular beam epitaxy. The active zone of the p–i–n diode consists of 20 layers of Ge/Si self-assembled quantum dots. The growth parameters of the active zone…
Abstract Two series of segmented polyurethanes were prepared with systematic variation in soft and hard segment length. The soft segment was constituted by polycaprolactone (PCL) blocks of molecular masses 530 or 2000 and the hard segment (HS) by urethane blocks, in a concentration that varied from 12% to 44% in weigh…
Thin‐walled (wall thickness, 100–2000 μm) mono‐ and bilayered ceramic tubes in the system Si–O–C–(N) were obtained by centrifugal casting of a polysiloxane/filler suspension. Si and SiC powders were dispersed in polyorganosiloxane/triethoxysilane solutions. After centrifugal casting in a Teflon tube with a rotational…