Materials Literature
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Abstract A series of poly(fluoroalkoxyphosphazenes) containing a mixture of 2,2,3,3,4,4,5,5‐octafluoropentoxy and 2,2,2‐trifluoroethoxy substituents was synthesized. The series included polymers with 25–94% incorporation of the trifluoroethoxy substituent, as well as single‐substituent polymers with 100% octafluoropen…
(5Z)-4-bromo-5-(bromomethylene)-3-butyl-2(5H)-furanone (furanone) from the red marine alga Delisea pulchra was found previously to inhibit the growth, swarming and biofilm formation of Gram-positive bacteria (Ren et al., 2002, Lett Appl Microbiol 34: 293-299). In the present study, the Gram-positive sulphate-reducing…
Abstract A new type of biodegradable starch‐based composites was prepared by injection‐molding using glycerol and water as plasticizers. Chitin flakes, obtained from shells of Penaeus schmitti , were used as reinforcing phase. The effect of chitin content on the structural and tensile properties of the composite sampl…
The corresponding author's email address was printed incorrectly at the bottom of p. 6 when this article was published. Dr. A. P. Kharitonov's correct email address is: khariton@binep.ac.ru We regret the error.
The misorientation dependence of the energy of grain boundaries in hcp metals is predicted by application of the disclination-structural unit model and continuum solutions for interfacial disclination dipoles in elastically anisotropic and inhomogeneous bicrystals. For symmetrical tilt boundaries in cobalt and titaniu…
Resonant x-ray diffraction in noncentrosymmetric crystals is studied by considering E1-E2 processes in the fast-collision approximation. The scattering amplitude is expressed in terms of polar and magnetoelectric operators of the valence states, which are involved in the resonance. Near-edge Bragg peaks from ferroelec…
Silane adhesion promoters are commonly used to improve the adhesion, durability, and corrosion resistance of polymer-oxide interfaces. The current study investigates a model interface consisting of the natural oxide of(100) Si and an epoxy cured from diglycidyl ether ofbisphenol A (DGEBA) and triethylenetetraamine (TE…
The synthetic vanadinites (Pb(x)Ca(10-x))(VO4)6(F(1-2y)O(y) (y))2, 0.57 < x < 9 and 0.10 < y < 0.47, adopt the P6(3)/m apatite structure with 9.7835 (3) < or = a < or = 10.0531 (1) A and 7.0318 (2) < or = c < or = 7.3033 (1) A. The calcium endmember is monoclinic, space group P2(1)/m, with a = 9.7370 (3), b = 9.7358 (…
The molecular dynamics of oligomeric poly(propylene glycol) (PPG) liquids (MW=1000, 2000, and 4000 g/mol) confined in a two-dimensional layer-structured Na-vermiculite clay has been studied by broadband dielectric spectroscopy. The alpha-relaxation and the normal mode relaxation processes were studied for all samples…
A temperature-independent proportional relation was discovered between magnetoresistance and magnetoentropy in metallic ferromagnets, ${\mathrm{La}}_{0.6}{\mathrm{Sr}}_{0.4}{\mathrm{CoO}}_{3},$ ${\mathrm{SrRuO}}_{3},$ and ${\mathrm{CoPt}}_{3}$ up to 90 kOe above, at, and just below Curie temperature. This concludes th…
The structure of La(1/3)NbO3 is that of a perovskite with La3+ cations ordered into alternate layers of perovskite A-sites. This is the description of a tetragonal structure and yet the room-temperature structure shows an orthorhombic distortion. The structure of La(2/3)TiO3 shows similar features. It has been recogni…
The structural properties of liquid GeO2 are investigated by means of molecular dynamics simulation using a pairwise potential. The simulations were performed in the microcanonical ensemble on systems with up to 576 particles prepared at 21 different densities, corresponding to pressures from -2 to 30 GPa, and tempera…
A model of the underwater discharge with initiating wire is presented. The model reveals the nature of similarity parameters which have been phenomenologically introduced in earlier experimental research in order to predict behavior of different discharges. It is shown that these parameters naturally appear as a resul…
We numerically investigate a colloidal particle driven through a colloidal crystal as a function of temperature. When the charge of the driven particle is larger or comparable to that of the colloids comprising the crystal, a local melting can occur, characterized by defect generation in the lattice surrounding the dr…
A new pentadentate N-isobutyrylsalicylhydrazidate ligand (H(3)ibushz, C(11)H(14)N(2)O(3)) and a self-assembly synthesis of the first 24-azametallacrown-8, [Fe(8)(C(11)H(11)N(2)O(3))(8)(CH(3)OH)(8)].0.5CH(2)Cl(2).7.5CH(3)OH.3.5H(2)O, have been reported. Eight Fe(III) ions and eight deprotonated ibushz(3)(-) ligands con…
Stacking-fault tetrahedra (SFT) are typical vacancy clusters in fcc metals. SFT have been, however, considered to be unstable in aluminum because of its high stacking-fault energy, until the recent finding of SFT in thin aluminum foils subjected to a tensile fracture. This study confirmed that SFT form in aluminum fol…
Abstract The influence of surface chemistry and boron doping density on the redox chemistry of Fe(CN) $\rm{ {_{6}^{3-/4-}}}$ at CVD polycrystalline diamond electrodes is considered. It is demonstrated that for this couple both the doping density and the surface chemistry are important in determining the rate of charge…
Finite difference schemes, named Compact Finite Difference Schemes with Spectral-like Resolution, have been used for a less crude approximation of the analytical hardness definition as the second-order derivative of the energy with respect to the electron number. The improved computational schemes, at different levels…
In the present work, quantification of the overall gas−liquid mass-transfer coefficient ( K L a ) in the sonochemical reactors (two different types viz. ultrasonic horn and ultrasonic bath) has been done using the dynamic method. The effect of operating parameters such as the power density into the system, gas flow ra…
A recent survey of the Cambridge Structural Database, CSD [Allen (2002). Acta Cryst. B58, 380-388], shows that the percentage of incorrect assignments of the space group Cc has remained at about 10% since the last survey in 1997.