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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction of pyrophosphate moieties with .alpha.-helixes in dinucleotide-binding proteinsRik K. Wierenga, Marc C. H. De Maeyer, and Wim G. J. HolCite this: Biochemistry 1985, 24, 6, 1346–1357Publication Date (Print):March 12, 1985Publication History Published online1 May 2…
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We have studied the aggregation of silica microspheres confined to two dimensions at an airwater interface. Under microscopic observation, both monomers and clusters are seen to aggregate by a diffusion-limited process. The clusters' fractal dimension is 1.20\ifmmode\pm\else\textpm\fi{}0.15, smaller than values obtain…
On the basis of our work An anionic group theory of electro-optical and nonlinear optical effects of the crystals, we first proposed the possibility of searching for new-type SHG crystals among the inorganic materials possessing planar ring groups. Since then, a new-type ultraviolet StIG crystal—β-BaB2O4 has been deve…
Se de-terminó un tamaño
De julio a diciembre de 1982 se tomaron muestras mensuales en Bahia Falsa, San Quintn, con el fin de determinar la composicin florfstica de las diatomeas epfitas de Z
An exact analytic solution for the random-phase-approximation dielectric response including the surface correction is derived for a semi-infinite layered electron gas with different dielectric media on either side of the surface. The Raman intensity is calculated. The bulk plasmon line shape agrees with experiment; co…
(1985). Constitution of Ni–Cr–Ru system. Materials Science and Technology: Vol. 1, No. 3, pp. 249-254.
The hystereis of the field induced cholesteric (-) nematic transition of chiral compounds with nematics of positive dielectric anisotropy has been examined. The results show that the initial orientation of the sample is important and indicate that in those applications where a strong contrast is not essential, an init…
The effects produced by the insertion of sodium in the trisulfides of titanium, niobium, and tantalum were investigated by electrochemical techniques. Cyclic voltammetry measurements were carried out in these materials using high‐temperature sodium cells which utilize the solid electrolyte β''‐alumina. The data demons…
Abstract Schultenite, PbHAsO 4 , known only from Tsumeb, Namibia, has been identified from a second occurrence: near North Bend, King County, Washington, USA. It occurs as euhedral crystals in a quartz-arsenopyrite-galena vein. It has a measured density of 6.07(3) g/cm 3 and a calculated density of 6.079(4) g/cm 3 . T…
High resolution specific heat measurements have been performed in the temperature range 60-190K. Two very weak anomalies were found around 80K and 140K. Thermal conductivity measurements have also been performed and there was no detectable anomaly. The results are discussed in view of actual proposed interpretations.
Loads and imperfections are introduced as control parameters in the potential energy, in Chapter 3. Limit points, asymmetric and symmetric bifurcation points are discussed, leading to an introduction, of expressions for the seven "elementary" catastrophes which much of the book centers on.Four of these expressions rel…
Abstract The anionic polymerization of a bridged bicyclic lactam, 2‐azabicyclo[2,2,1]heptan‐3‐one (ABHO), was carried out in bulk and in solution under various reaction conditions. In general bulk polymerization of ABHO was superior to solution polymerization in conversion and degree of polymerization. The resulting p…
Abstract At low temperatures TbPO 4 undergoes two successive phase transitions. Antiferromagnetic ordering along the tetragonal c ‐axis at T N1 = 2.28 K is followed below T N2 = 2.13 K by a structure of lower symmetry where the moments are tilted off the c ‐axis by about 20°. The B‐T phase diagram ( B along c ) is det…
The physical properties of cotton and polyester/cotton blend yams sized with several two-component size formulations were evaluated. The sizing systems included starch/polyvinyl alcohol, starch/polyester, and polyvinyl alcohol/polyester. The yams were evaluated by means of tensile tests and by measurements of rupture…
The minimal conditions under which a surface mode of the Bleustein–Gulyaev type can be made to propagate in a ferromagnetic substrate are established within the framework of a fully nonlinear, rotationally invariant, and thermodynamically admissible continuum theory of deformable ferromagnets. It is sufficient that th…
A ternary metal-nucleotide complex, Na2[Cu(5’-IMP)2(im)o,8(H20)l,2(H20)2h]as~ 1be2e.n4 pHr2ep0a,r ed and its structure analyzed by X-ray diffraction (5’-IMP = inosine 5’-monophos hate; im = imidazole). The complex crystallizes in space group C222, with a = 8.733 (4) A, b = 23.213 (5) A, c = 21.489 (6) 1, and Z = 4. Th…
The question of coexistence of cubic-to-tetragonal structural transition and both paramagnetic-to-ferromagnetic and -antiferromagnetic transitions in a twofold-degenerate band is studied under the Hartree-Fock approximation of the Hubbard Hamiltonian. The phase diagrams for both the transitions have been worked out at…
Abstract Copolymers from styrene and a mixture of p ‐ and m ‐chloromethylstyrene were reacted with sodium cyclopentadienide in THF and precipitated in methanol at temperatures lower than −20°C to obtain soluble cyclopentadienylated polymers. Due to extensive gelation, the content of cyclopentadienyl groups could not b…