Materials Literature
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With its excellent color and tone reproduction, thermal dye transfer printing produces continuous-tone color images that rival silver halide photography. However, conventional thermal dye transfer images fade easily when subjected to light or heat. To solve this problem, we have studied a chelate compound system and h…
Although eddy current losses in flitch plates of large power transformers may form a small part of total transformer losses, they are important because they can appear concentrated in a small area and cause hazardous hot-spots. An analytical method to calculate flitch plate eddy loss is a very useful practical guide t…
Some N-containing or S-containing organic substances and some acetylenic alcohols were tested as inhibitors of the corrosive attack suffered by Fe-based metallic glasses in deaerated 0.1 N sulfuric acid (H2SO4) solution at 25°C. It was verified that the specific action these compounds exerted on the corrosion process…
Off-stoichiometric NiZn ferrite was obtained by hydrothermal process and compacted in torus form under different pressures. Two samples A1 and A2 - cobalt doped (0.5 %) were sintered at 1573 K in air atmosphere during 3 h. The magnetic properties were studied by vibrating sample magnetometry, Mössbauer spectroscopy an…
Abstract The properties of recycled PVC bottle material separated from the post‐consumer waste stream were investigated. In the first part of this study, attention was focused on the mechanical properties. In order to examine the effects of recycling, the properties of the recycled material were compared with those of…
Thin films of vanadium oxide were prepared by means of r.f. reactive sputtering. Their physical properties were studied as a function of the oxygen content in the sputtering atmosphere. Atomic force microscopy (AFM) and X-ray photoelectron spectromicroscopy (XPSM) investigations have been used for the study of the mor…
Pyridine-catalyzed reactions of methyldichlorosilane with bis(trimethylsilyl)carbodiimide afford a dichlorosilane-derived anhydrous sol–gel material. Both trimethylchlorosilane formation and Si–H disproportionation act as crosslinking mechanisms. The dried gels form amorphous or crystalline materials, depending on th…
LaGaO3 is reported to undergo a low-temperature phase transition from Pnma to R3c at 418 K. The phases involved in the low-temperature phase transition of LaGaO3 were determined using Raman spectroscopy from 77 to 773 K. There is a total of 17 bands observed in the room temperature (294 K) Raman spectrum, namely, 55(A…
Basic regularities of silicon nitride based materials microstructure formation and development in interrelation with processing conditions, type of sintering additives, and starting powders properties are discussed. Models of abnormal or exaggerated grain growth are critically reassessed. Results of several model expe…
The existence of a global gene regulatory system in the hyperthermophilic archaeon Sulfolobus solfataricus is described. The system is responsive to carbon source quality and acts at the level of transcription to coordinate synthesis of three physically unlinked glycosyl hydrolases implicated in carbohydrate utilizati…
Observations and analysis of hypersensitive P03→3F2 transition of Pr3+ ion are reported in a series of fluoride (fluoroindate, fluoroaluminate, and fluorozirconate) glasses. The data in fluoride families are also compared with the data on the selected tellurite and sulfide glasses. The structure of dopant sites in flu…
One of the important considerations in the selection of a polymer blend for a practical application is how it resists crack growth and/or failure from a material flaw, under static or fatigue conditions. The blending of two or more rubbers is a useful technique to improve certain properties not inherent in a single ru…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTKinetic Stabilization of Biopolymers in Single-Crystal Hosts: Green Fluorescent Protein in α-Lactose MonohydrateMiki Kurimoto, Paramjeet Subramony, Richard W. Gurney, Scott Lovell, Jean Chmielewski, and Bart KahrView Author Information Department of Chemistry, Box 3517…
A method for the synthesis of boron nitride (BN) fullerene-like nanoparticles (FNPs) and (BN) x C y nanotubes in large quantities using carbon nanotubes as templates is presented. Boron oxide vapor was reacted with nitrogen gas in the presence of carbon nanotubes (CNTs) at 1573 K in a boron nitride crucible to form BN…
Stress corrosion cracking (SCC) on the external surface of pipelines contributes to the major failure of pipelines. The great majority of SCC is intergranular and occurs in a carbonate-bicarbonate environment. Metallurgical factors affecting SCC are still vague and therefore have been studied. Uniform microstructures,…
Abstract The effects of nucleating agent, temperature of crystallization, and degree of machine direction (MD) orientation on the mechanical, optical, and thermal properties of biaxially oriented polypropylene (BOPP) films were investigated. Addition of nucleating agent improved only the initial tear resistance in the…
The technique of real-time electronic speckle pattern interferometry (ESPI) is proposed to study the diffusion process of surfactants and proteins in gels. The diffusion coefficient is simply and directly determined from the interferograms. The experiments were carried out on a series of surfactants as well as on a my…
Five silsesquioxanes (RSiO3/2)2n with R = siloxy and n = 4, 5 have been investigated by X-ray crystallography, MALDI-TOF mass spectrometry, and differential scanning calorimetry (DSC).
A comparative crystallographic analysis of the conformation of porphyrin diacids with various substituent types reveals considerable differences in the degree of nonplanarity and distortion modes. Diacids of 5,10,15,20-tetraarylporphyrins generally exhibit typical saddledistorted macrocycles with displacements of the…
The thermal stability of the powder or film forms of Eudragits L, S, and L30D and carbopol polymers was qualitatively investigated by microscopic reflectance Fourier transform infrared spectroscopy equipped with differential scanning calorimetry (FT-IR/DSC microscopic system). DSC and thermogravimetric analysis (TGA)…