Materials Literature
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A new homologous series of 4-halogeno-N-(4-alkoxysalicylidene) anilines was synthesized. The phase transitions of these homologues were determined using a differential scanning calorimeter and an ordinary polarizing microscope. It is shown that the homologues exhibit liquid crystalline phases as the terminal alkoxyl c…
The resonant frequency of electrochemical quartz crystal microbalance (EQCM) electrodes (carbon, nickel, and aluminum) decreases gradually with time in 1 M LiClO 4 /ethylene carbonate ( EC ) + dimethyl carbonate (DMC) after the immediate frequency shift due to the presence of liquid column on the quartz crystals. It i…
In late summer 1995, intertidal flats situated in the freshwater tidal and brackish reaches of the Schelde estuary were sampled to study the microphytobenthos in the upper estuarine reaches. Diatoms dominated the microphytobenthos community at all sites while coccoid green algae, flagellates or cyanobacteria never con…
Low molecular weight surface-active substances such as fatty acids and alcohols have a detrimental effect on head retention. They weaken the foam films by adsorbing on the bubble surface or on the major foam-generating proteins. This study quantitatively demonstrated that the detrimental effect and the defoaming mecha…
In the use of stainless steels at seawater environment, pitting or crevice corrosion of stainless steels become a problem. It was reported that the potential of stainless steel in natural seawater environment rises more noble than in artificial seawater. On the other hand, it is well known that alloying chromium, moly…
This review article on delayed fracture of bolts covers the following topics: general features of delayed fracture, case histories of in-service failures of high-strength bolts, existing demands for higher-strength bolts and their background, increasing needs for standardization of delayed fracture susceptibility eval…
In this work, we describe the synthesis of two new copper(II) compounds, (Pr-Rad)2 [Cu(opba)].H2O (1) and (Bu-Rad)2[Cu(opba)].2H2O (2) where opba stands for ortho-phenylenebis(oxamato) and RRad+ are nitronyl nitroxide radical cations. From 1 and 2, two new molecule-based magnets [Pr-Rad]2[Mn2{Cu(opba)}3 ].3.3DMSO.5H2O…
The field emission properties of a polycrystalline diamond film with hydrogenated and hydrogen free surfaces have been investigated by monitoring both the emission current–voltage curve and emission site density. A very low turn-on field of electron emission was found to be 0.5 V/μm for the hydrogenated surface and 4…
Unsized AS-4 carbon fibers were subjected to RF plasma etching and/or plasma polymerization coating in order to enhance their adhesion to vinyl ester resin. Ar, N2 and O2 were utilized for plasma etching, and acetylene, butadiene and acrylonitrile were used for plasma polymerization coating. Etching and coating condit…
The molecular conformations and packing of [(tBuCO2)3M2(mu-X)M2(O2CtBu)3], where M = Mo and W, and X = oxalate and perfluoroterephthalate, determined in the solid-state from powder X-ray diffraction analysis, reveal one-dimensional coordination polymers involving pivalate-oxygen to metal interactions (X = perfluoroter…
The effect of the cathode-to-anode area ratio on the normalized power density for solid oxide fuel cells was investigated. A geometrically symmetric cell having a screen printed cathode produced a power density of 0.45 W / cm 2 at 800 ° C . However, using a cathode with a geometric area significantly less than that of…
Graphite crystals were formed from a mixture of poly (vinyl pyrrolidone) (PVP) or polyacrylamide (PAA) pow-der and magnetite powder at 1150-1200°C. The graphite was identified by X ray diffraction and transmission elec-tron microscopy. The carbon yield from PAA at 1200°C was about four times of that from PVP, but PAA…
A simplified method to evaluate the premixing molten core mass is proposed, based on the molten jet breakup length and settling/cooling dynamics of the particles generated from the jet surface. The present method was applied to KROTOS experiments at JRC Ispra with alumina and corium melts, as well as to a prototypic g…
A novel dissolution method was developed, suitable for powder mixtures, based on the USP basket apparatus. The baskets were modified such that the powder mixtures were retained within the baskets and not dispersed, a potential difficulty that may arise when using conventional USP basket and paddle apparatus. The advan…
The reaction of anhydrous CuCl2 with HCl and 2-amino-5-iodopyridine in 1-propanol resulted in two polymorphs of (5-IAP)2[CuCl4] [5-IAP = 2-amino-5-iodopyridinium], one as red rods (1) and one as orange prisms (2). The two polymorphs have been characterized by single crystal x-ray diffraction and variable temperature m…
Hemicellulosic succinates with a degree of substitution ranging from 0.28 to 1.67 were prepared by modification with succinic anhydride using pyridine as catalyst and N, N-dimethylformamide/lithium chloride system as solvent. Variations in reactant molar ratio from 1:1 to 6:1 and reaction time from 1 to 12 h resulted…
The objective of this study was to investigate the effects of types of motion and loading conditions on the wear of Pressurized Water Reactor (PWR) fuel rod cladding made of Zircaloy-4 in contact with a grid support cell. Fretting-wear tests, for various combinations of motion and preload, were conducted at 310°C and…
We have investigated the spin-crossover behavior for one-dimensional complexes [Fe(trz) 3 (RSO 3 ) 2 (trz= triazole) and two-dimensional mixed-valence complexes (C n H 2n+1 ) 4 N[Fe II Fe III (dto) 3 ](dto=C 2 O 2 S 2 ). For the case of [Fe(4-NH 2 trz) 3 ](RSO 3 ) 2 , we have controlled Tc and the thermal hysteresis w…
SUMMARIES The effect of the deacidification spray CSC Book Saver ® on a mechanical pulp paper and a pure cellulose paper was tested and the consumption of the magnesium based alkaline reserve over time was simulated by exposing the papers to nitrogen dioxide. Scanning electron microscopy and energy dispersive X-ray an…
The transformation and crystallization behaviors of the polymorphs (A and C) and solvated crystals (BH (BPT·0.5H2O) and D (BPT·MeOH)) of the thiazole-derivative pharmaceutical (BPT) were investigated. The solubility of metastable form was measured with the vigorous stirring using a magnetic stirrer. It was found that…