Materials Literature
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Abstract Macrocyclic Gd III complexes attached to dendrimers represent a new class of potential MRI contrast agents. They have an extended lifetime in the blood pool, which is indispensable for their application in magnetic resonance angiography, and high relaxivities, which reduce the dose required to produce quality…
The profile function of the Bragg reflection is composed of the contributions of the apparent size and shape of the crystallites, of the strain and of the instrument function. The contribution of the strain is obtained from the displacement distribution of the unit cells. The apparent shape and size of the crystallite…
The Vanadium/Lithium system has been the recent focus of ANL's Blanket Technology Program, and for the last several years, ANL's Liquid Metal Blanket activities have been carried out in direct support of the ITER (International Thermonuclear Experimental Reactor) breeding blanket task area. A key feasibility issue for…
Abstract The terminal microstructure of the hydrogenated α,ω ‐diisopropenyloligo(propylene) prepared by thermal degradation of isotactic poly(propylene) at 370°C was determined by means of 13 C NMR spectroscopy, and therefrom the stereoisomerization reaction of the reacting polymer segment is discussed in relation to…
Dynamic mechanical spectrometry was used to investigate the network formation processes during the high-temperature isothermal post-cure of virgin and hydrolytic degraded AFR700B resin. Upon exposure to hydrolytic conditions, a significant degradation in physical and mechanical properties of newly developed high-tempe…
This paper reports the results obtained in a study of the crystal structure of two villamaninite samples from Villamanín (León, Spain), labeled (1) and (2). Villamaninite, (Cu,Ni,Co,Fe)(S,Se) 2 , is a pyrite-type disulfide. Different long-period elements, including Au, in ionic substitution are also observed. Previous…
Experimental solubilities are reported at 25.0 °C for benzil dissolved in twenty three different organic nonelectrolyte solvents containing ester–, ether–, chloro–, hydroxy– and methyl–functional groups. Results of these measurements combined with our previously published benzil solubility data in benzene, toluene, di…
Two types of water detritiation systems have been designed for fusion reactors of ITER scale. One of the systems is a combination of WD (Water Distillation) and VPCE(vapor phase catalytic exchange) columns. The other is a combination of a WD column and a CECE(combined electrolysis catalytic exchange) column. Three wat…
Thin solid films of titanyl phthalocyanine (TiOPc) and vanadyl phthalocyanine (VOPc) have been vacuum evaporated onto glass substrates held at various temperatures in the range from -30 to 240°C. FT-Raman spectra have been collected using an Nd:YAG laser emitting at 1064.1 nm, a Michelson interferometer and an InGaAs…
Abstract Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy has been used to determine the nature of acid sites present in Na + -, Ni 2+ - and Al 3+ -exchanged montmorillonite using the diagnostic base, pyridine. The pyridine additions were performed in situ at 25°C in the presence of liqu…
Nezilovite, ideally PbZn 2 (Mn (super 4+) ,Ti (super 4+) ) 2 Fe 8 O 19 , is a newly recognized member of the magnetoplumbite group from Nezilovo, FYR Macedonia. It forms black, magnetic crystals up to 1 mm with a tabular, hexagonal outline. Electron-microprobe analyses yielded PbO 19.01, CaO 0.03, Sb 2 O 5 0.25, ZnO 1…
In situ, high-temperature Raman spectroscopy of Na,O.9SiO, glasses and melts with and without 2 mol% P,05 has been conducted to 1491 K (near the liquidus temperature). In the temperature range from 298 to ~ 1000 K (below the glass-transition temperature range), orthophosphate (PO~-) complexes appear to be the dominant…
Sediments recovered during Ocean Drilling Program Leg 151 at Site 907 from the Iceland Plateau have good recovery and a pristine paleomagnetic record. Well-preserved diatoms are present throughout the middle Miocene to upper Pliocene interval and in the Holocene of Site 907. The stratigraphic occurrence of diatom spec…
The motion of bubbles in a Hele–Shaw cell driven by a surrounding fluid or by gravity has been studied. Assuming that the surrounding fluid wets the solid wall and that the bubble surface is rigid due to the surfactant influence, the translational velocity of an elliptic bubble is estimated. The result indicates that…
Some aspects of the crystal chemistry of the bismuth-containing layered ferroelectrics of the Am−1Bi2BmO3m+3 type are discussed: conditions for the existence of the compounds, behavior of compounds of Am−1Bi2BmO3m+3 + nA′B′O3 series, two ways of the solid solution formation, peculiarities of the ferroelectric state, i…
Dissociative adsorption of methyl iodide at 300 K on Si(100) was followed by multiple-internal reflection Fourier transform infrared spectroscopy. The absorption spectrum shows only two peaks in the CH stretching region (2890 and 2955 cm−1) which are assigned to the symmetric and antisymmetric CH stretching modes of…
The suitability off a Y2O3:Eu3+ scintillator for use in radiation detectors and medical image receptors was studied. Y2O3:Eu3+ was used in the form of laboratory prepared screens of different coating thicknesses. The x-ray luminescence efficiency of the screens was measured for tube voltages between 50-200 kVp and in…
Abstract Flax‐nonwoven reinforced polypropylene has become a competitor to textile glass fabric reinforced polypropylene because of its economic and ecological advantages. Suitable application forms are needle‐punched 100% flax or hybrid fabrics of flax/polypropylene manufactured of rough and fine decorticated flax. T…
Abstract The extensive initial loss of efficiency of antioxidant [4,4′‐thiobis(3‐methyl‐6‐tertbutylphenol)], during hydrostatic pressure testing of medium density polyethylene pipes at 95 and 105°C has been studied. Samples from the pressure‐tested pipes were subsequently investigated by scanning electron microscopy a…
We have studied the influence of halide and halate ions on the enhancement factors of surface-enhanced Raman scattering (SERS) in the near-infrared (NIR) wavelength region. It was found that not only an electromagnetic enhancement mechanism but also a chemical enhancement mechanism contributes to the total surface enh…