Materials Literature
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Mortars with lime-tufa-gipsum binder where studied when submitted to different types of curing. The mortars were prepared with a binder/sand ratio of 1/3 and a/c= 0,7, and they were demoulded after 24 hours. In the tested specimens, variations in values of bending strength, compressive strength and volumetric weight w…
Grain boundary mobility of CeO 2 containing 0.1% and 1.0% trivalent dopant cations (Sc, Yb, Y, Gd, and La, in order of increasing ionic radius) has been measured. At the lower dopant concentration (intrinsic regime), mobility is controlled by grain boundary diffusion of host cations, whereas at the higher dopant conce…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAsymmetric Drainage in Foam FilmsJean-Luc Joye, George J. Hirasaki, and Clarence A. MillerCite this: Langmuir 1994, 10, 9, 3174–3179Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Published inissue 1 September 1994https://pubs.acs.org/…
We report here the identification and characterization of pgm, a gene in Escherichia coli that encodes the enzyme phosphoglucomutase, specifically required for the catalysis of the interconversion of glucose 1-phosphate and glucose 6-phosphate. The predicted amino acid sequence of the pgm gene is highly conserved in E…
Technical Briefs On the Modeling of Fracture of Brittle Solids Y. V. Petrov, Y. V. Petrov IPTRAN, Academy of Sciences of Russia, 12 Linia, 13, St. Petersburg, 199178, Russia Search for other works by this author on: This Site PubMed Google Scholar N. F. Morozov N. F. Morozov Department of Elasticity, St. Petersburg St…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTParaelectric-Ferroelectric Transition in the Lamellar Thiophosphate CuInP2S6A. Simon, J. Ravez, V. Maisonneuve, C. Payen, and V. B. CajipeCite this: Chem. Mater. 1994, 6, 9, 1575–1580Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Publ…
Abstract Degreasing with solvents, chemical etching, polishing, oxygen and argon plasma treatment and heating and drying produce stainless‐steel surfaces with different amounts of organic contamination and ‘bonded water’. The hydroxide/oxide layer of the passive film formed on stainless‐steel foils is also affected by…
A new group of stable icosahedral phases (i-phases) in the Zn-Mg-RE system were found to have an ideal composition close to Zn50 Mg42RE8 (RE ≡ Y, Gd, Tb, Dy, Ho or Er). The new i-phases exhibit a highly ordered and nearly perfect face-centred icosahedral lattice as revealed by electron and X-ray diffraction and high-r…
Construction of High Temperature Engineering Test Reactor (HTTR) is now underway to establish and upgrade basic technologies for HTGRs and to conduct innovative basic research at high temperatures. The HTTR is a graphite-moderated and helium gas-cooled reactor with 30 MW in thermal output and outlet coolant temperatur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Tailoring Approach for Simulation of Electrostatic PropertiesShridhar R. Gadre, Rajendra N. Shirsat, and Ajay C. LimayeCite this: J. Phys. Chem. 1994, 98, 37, 9165–9169Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Published…
On the basis of a Ginzburg-Landau model for ferroelectric perovskites, we calculate an effective free energy for a polarization field by eliminating elastic fields which are coherently induced by inhomogeneous configurations of polarizations. We obtain elastic long-range interaction between polarization fields on an a…
We extend the rigorous eigenmode theory of binary surface-relief gratings to accommodate three-dimensional-modulation profiles, to formulate a synthesis problem for doubly periodic resonance-domain diffractive elements, and to demonstrate some of the problem’s symmetry properties. Several solutions for multiple beam s…
Lead‐rich intermediate phases, in particular Pt 5–7 Pb and PbO, are found to form on Pt(111) atop Ti–buffered Si substrates prior to formation of Pb(Zr 1− x Ti x )O 3 (PZT) thin films. Pt 5–7 Pb is a [111] textured transient intermetallic phase that nucleates PZT[111] texture. PbO is a [001] textured layer compound th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel Polyoxoanion- and Bu4N+-Stabilized, Isolable, and Redissolvable, 20-30-.ANG. Ir300-900 Nanoclusters: The Kinetically Controlled Synthesis, Characterization, and Mechanism of Formation of Organic Solvent-Soluble, Reproducible Size, and Reproducible Catalytic Activity Me…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic Production of Dimethylformamide from Supercritical Carbon DioxidePhilip G. Jessop, Yi Hsiao, Takao Ikariya, and Ryoji NoyoriCite this: J. Am. Chem. Soc. 1994, 116, 19, 8851–8852Publication Date (Print):September 1, 1994Publication History Published online1 May 2002…
Using generalized stacking-fault (gsf) energies obtained from first-principles density-functional calculations, a zero-temperature model for dislocations in silicon is constructed within the framework of a Peierls-Nabarro (PN) model. Core widths, core energies, PN pinning energies, and stresses are calculated for vari…
The behaviour of the total momentum of a system immersed in the Berendsen thermostat is analyzed. It has been found that under certain conditions the kinetic energy of the system can be transformed from internal degrees of freedom to the external ones, and conversely. A concrete example of such a transformation is pre…
The lattice dynamical properties have been studied by Raman spectroscopy in bismuth layer-structure oxides Bi 4 Ti 3 O 12 , and ABi 4 Ti 4 O 15 (A=Ba, Ca, Pb, Sr). The rigid-layer modes were observed in all compounds in the range 57–62.5 cm -1 . The lowest mode of Bi 4 Ti 3 O 12 shows marked softening, and the square…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTensile Properties of Crystalline Polymers: Linear PolyethyleneM. A. Kennedy, A. J. Peacock, and L. MandelkernCite this: Macromolecules 1994, 27, 19, 5297–5310Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Published inissue 1 Septembe…
Technical Briefs Crack-Tip Singular Fields in Nonhomogeneous Materials Zhi-He Jin, Zhi-He Jin Department of Mechanical Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizouka 432, Japan Search for other works by this author on: This Site PubMed Google Scholar Naotake Noda Naotake Noda Department of Mechani…