Materials Literature
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This article reports the first perbromination of β-pyrrole and meso-phenyl groups of the 5,10,15,20-tetrakis(3',5'-dimethoxyphenyl)porphinato copper(II) to generate highly brominated porphyrin, 2,3,7,8,12,13,17,18-octabromo-5,10,15,20-tetrakis(2',6'-dibromo-3',5'-dimethoxyphenyl)-porphinato copper(II), CuT (3',5'- DMP…
Stearoyl-CoA desaturase (SCD) is an integral membrane protein of the endoplasmic reticulum that is rapidly and selectively degraded when isolated liver microsomes are incubated at 37 degrees C. We previously reported the purification of a 90-kDa microsomal protein with SCD protease activity and characterized the inhib…
A novel azobenzene compound bearing a short poly(ethylene glycol) methyl ether side chain, N-methyl-N-{4-[(E)-(4-nitrophenyl)diazenyl]phenyl}-N-(3,6,9,12,15,18,21,24-octaoxapentacos-1-yl)amine (RED-PEGM-8) was synthesized and characterized. RED-PEGM-8 exhibits a thermal behavior similar to that of Disperse Red-1; howe…
Reducing the high gas permeability of plastic packaging is of serious concern for a variety of applications in food packaging and microelectronics arena. In the development of high altitude scientific balloons, the potential for unmanned mission success is critically related to the improvement in helium barrier capabi…
Radioiodine entering the containment from the postaccident primary circuit in vapor or gaseous form, as observed in the Phebus FPT0 and FPT1 tests, has a direct impact on the source term evaluation. State-of-the-art fission-product transport codes based on the assumption of thermochemical equilibrium failed to predict…
A new cycle model of a two-stage combined semiconductor thermoelectric device that is used as a heat pump is established. The influence of Joule heating due to the electric current and heat leak due to the temperature difference between the hot and the cold junctions on the performance of the system is investigated. T…
Abstract Commercially available butter, regular‐fat margarine, and a fat‐reduced margarine (38% fat w/w) were stored between 10 and 35°C for up to 4 d to elaborate on the relationship between droplet size and solid fat content (SFC) that exists in these spreads. At 10°C, the mean volume‐weighted droplet size for butte…
The effect of texture and β grain size on the superelasticity (SE) in Cu-Al-Mn-based alloys was investigated by tensile testing. The SE strain increases with increasing relative grain size d/t (d: grain size and t: specimen thickness), which is explained as being due to a relaxation of the grain constraint in the poly…
In this study, the evolution of the flow stress for grain sizes ranging from about 11 to 1 µm under shear deformation was examined using two-dimensional discrete dislocation dynamics. The grain boundaries were assumed to be both the only sources for nucleation of the dislocations and also the only obstacles to the dis…
Abstract Elastomers are soft materials that can be reinforced by dispersing into them nanosized solid particles. Common examples of the latter are silica or carbon black aggregates. However, the mechanism of reinforcement is still not yet fully understood. Our work consists in investigating by small‐angle X‐ray scatte…
To clarify the essential features of Brill transition of aliphatic nylons, structural changes have been investigated by X-ray diffraction and infrared spectroscopic methods for the compounds CH 3 (CH 2 ) 10 NHCO(CH 2 ) 9 CH 3 (designated as N11 ) and CH 3 (CH 2 ) 9 NHCO(CH 2 ) 8 CH 3 ( N10 ) which were assumed to be t…
The conductivity of tin‐doped indium oxide (ITO), a transparent conductor, is critically dependent on the amount of tin doping and oxygen partial pressure during preparation and annealing. Frank and Köstlin ( Appl. Phys. A , 27, 197–206 (1982)) have rationalized the observed carrier concentration dependence by postula…
Comparative modeling methods are commonly used to construct models of homologous proteins or oligomers. However, comparative modeling may be inapplicable when the number of subunits in a modeled oligomer is different than in the modeling template. Thus, a dimer cannot be a template for a tetramer because a new monomer…
Abstract High molecular weight poly(phenylene thioether) ( 3 ) was successfully obtained by the polycondensation of 4,4′‐thiobisbenzenethiol ( 1 ) and dibromomethane ( 2 ) with a variety of feed ratios in the presence of 1,8‐diazabicyclo[5,4,0]undec‐7‐ene (DBU) in 1‐methyl‐2‐pyrrolidinone (NMP) at 75°C. The resulting…
Abstract Natural soils change by long-term pedogenetic mechanisms, but tillage effects can also strongly affect the evolution of soils, mainly their physicochemical properties. The present paper describes the impact of fertilizers and amendments on soil mineralogy in experimental plots, without plant interaction. The…
The photocatalytic function of three-dimensional porphyrin monolayer-protected gold clusters (MPCs) with different chain lengths has been examined in photocatalytic reduction of hexyl viologen (HV 2+ ) by 1-benzyl-1,4-dihydronicotinamide (BNAH) in comparison with that of the reference porphyrin compound without metal…
We report the synthesis of fixed-size ZnS nanoclusters approximately 24 A in diameter with varying manganese concentrations. Various samples of Zn1-x MnxS, with x = 0, 0.02, 0.055, 0.09, and 0.13, have been prepared and characterized using X-ray diffraction, energy-dispersive analysis of X-rays, UV absorption, fluores…
Using ultraviolet and x-ray photoelectron spectroscopies, we investigate four types of the (100) surface of homoepitaxial diamond films, either doped with boron or undoped. We measure the position of the valence band maximum at the surface, the electronic affinity and the density of states. In p-type doped films, cond…
Enthalpies of drop solution in molten 2PbO‐B 2 O 3 at 1078 K were measured for glasses along the 2YAlO 3 ‐3SiO 2 and return ½Y 3 Al 5 O 12 ‐3SiO 2 joins. The onset glass transition temperature increases slightly with increasing silica content and Y/Al. Enthalpies of mixing were calculated on the basis of amorphous end…
Water treeing is one of the factors leading to failure of medium voltage XLPE cables in long-term service. Increased moisture content inside oil-paper insulated cable is not desirable. To identify water tree degraded XLPE cables or oil-paper cables with high moisture content, diagnostic tests based on dielectric respo…