Materials Literature
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Dilute magnetic semiconductors and wide gap oxide semiconductors are appealing materials for magnetooptical devices. From a combinatorial screening approach looking at the solid solubility of transition metals in titanium dioxides and of their magnetic properties, we report on the observation of transparent ferromagne…
A theoretical model is proposed that describes the dependence of foam stability on the surfactant concentration in a foam-forming solution. The model is based on the parameters reflecting a fractal structure and percolation properties of the foam. It is established that a time corresponding to the onset of the liquid…
Transparent and crack-free Bi2Ti2O7 thin films with strong (111) orientation were successfully prepared on n-Si(100) by chemical solution deposition (CSD) using bismuth nitrate and titanium butoxide as starting materials. The growth procedure of the Bi2Ti2O7 thin films is discussed in this paper. The surface morpholog…
The results of EPR investigation of improper ferroelastic crystals MgGeF6·6H2O: Mn2+ allow to conclude that at Ti1=403 K these crystals undergo transition to structurally incommensurate phase. The order parameter of this transition is probably the angle of Mg[H2O]6 2+ octahedra rotation around crystal C3 axis, which d…
Shock waves in quasicrystals of the AlCuLi type and in approximant crystals of the C15 Laves phase have been studied by MD simulations. Three regimes are found: at low shock wave intensity the system reacts elastically, at high intensities it is turned amorphous. In the intermediate region we find a continuous transit…
An analogy between the formalism of a probabilistic approach to localized corrosion of stainless steels and the formalism of the classical approach to general corrosion of metals is highlighted. This formal analogy is justified experimentally through the study of the roughness evolution of stainless steels, iron, and…
Abstraα πle texture of Korean puffed rice snack(Yukwa) is influenced by dough viscoelasticity, cell size and disσibution in dough which are 와fected by mixing process.Mixing energy input was measured by using an am야remeter and powermeter.ηle effect of steeping time(l, 3, 6 days) and mixing time(5, 10, 15, 20 min.) on m…
The phase transitions of two ternary fluorides have been reinvestigated by thermal and X-ray diffraction analyses. Four phase transitions have been detected at T 1 = 483 ± 5 K, T 2 = 548 ± 5 K, T 3 = 765 ± 5 K and T 4 = 867 ± 5 K for Li3AlF6. Only two transformations occurred at T 1 = 550 ± 5 K and T 2 = 660 ± 10 K fo…
Measurements of the nonlinear refractive index n 2 of a high-porosity freestanding porous silicon sample are reported at different laser wavelengths by means of the z-scan technique. The results show a negative below-gap nonlinear refractive index, so that thermal contributions to the observed effects can be reasonabl…
Ferroelastic domain boundary can be regarded as a type of twin domain boundary. A twin deformation is induced in a conducting organic crystal (TMTSF)2X when the shear stress is applied. TMTSF denotes tetramethyle-tetraselenafulvalene and × does an anion such as CIO4 + and PF6 +. The boundary can move easily along one…
A system of equations describing the process of plastic deformation in a crystal is used to investigate self-sustained traveling structures theoretically. The equations for the velocity and density of dislocations are shown to describe two types of instability which are associated with anomalous damping of dislocation…
Fructose-1,6-bisphosphate aldolase (E.C. 4.1.2) catalyses the reversible cleavage of fructose-1,6-bisphosphate to dihydroxyacetone phosphate and glyceraldehyde-3-phosphate in the glycolytic pathway of prokaryote and eukaryote organisms. The enzyme was obtained from the extreme thermophile Thermus aquaticus and, in con…
Laminates consisting of natural rubber (NR) sandwiched between cloth fabric and polyester film were pulled apart at various rates and temperatures in a T-peel geometry. Peel energies for joints containing uncrosslinked or lightly-crosslinked NR did not obey simple time-temperature superposition. This behavior is attri…
B 11 and B10 magic-angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy was conducted to characterize cubic boron nitride films prepared by plasma chemical vapor deposition. Similarities and differences between cubic boron nitride films and polycrystals synthesized at high pressure and high temperature wer…
In this study, the intergrain magnetoresistance (IMR) of La 0.7 Sr 0.3 MnO 3 (LSMO) thin films at 77 K and the IMR's deposition temperature ( T d ) dependence were examined. All LSMO films were grown on the polycrystalline MgO substrate (40–60 µm grain size) by the Ar–F excimer laser ablation (pulsed laser deposition)…
A study has been carried out to investigate the past and present techniques, processes and procedures that enable creation of seamless fashion towards innovative ends. Among the fifteen techniques investigated, knitting and moulding are by far two of the most developed toward seamless clothing production. This paper g…
Pb(Zr,Ti)O3 (PZT) and Pb(Zr,Ti,Nb)O3 (PNZT) thin films were grown on platinized silicon substrates by r.f. magnetron sputtering followed by a post-annealing treatment. The Niobium, Nb, concentration varied from 1 to 7 at.% by increment of 1 at.%. The effects of the Nb introduction on the PZT electrical properties, i.e…
A new species of Triceratiaceae is described for estuarine environments of Southern Brazil. The valve of Triceratium moreirae sp. nov. is triangular with elevations bearing ocellus and a rimoportula in their basis. The valvar surface has robust pseudoloculi, circular to polygonal, each one confining a group of areolae…
CysB is a positive regulator of transcription of genes involved in cysteine biosynthesis in Gram-negative bacteria and belongs to the large family of LysR-type transcriptional regulators. The full-length protein from Klebsiella aerogenes has been crystallized from solutions containing PEG 8000 in the presence and in t…
In our previous study, seam pucker simulation baased on mechancial calculation was proposed. Here, the simulation system is extended to consider collision between fabrics and seam pucker simulation of two strips of fabric is carried out. We adopt non‐linear bending rigidity observed in actual fabric tests and obtained…