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The amino-terminal propeptide, consisting of 77 amino acid residues, is known to be required as an intramolecular chaperone to guide the folding of mature subtilisin E, a serine protease, into active mature enzyme. Many mutations within the pro-sequence have been shown to abolish the production of active subtilisin E…
Low-frequency Raman- and neutron-scattering spectra are compared for the three glass formers polybutadiene, polystyrene, and ${\mathrm{SiO}}_{2}$ at different temperatures. One finds similar neutron and Raman spectra in the frequency range where the quasielastic (relaxational) contribution dominates, but a marked quas…
Through three different studies, using BaTiO3 samples, as a powder while heating over the Curie temperature, and as a ceramic while applying an electric field, it is shown how X-ray diffraction (XRD) is able to give information about the evolution of the ferroelectric domain microstructure. Firstly, the relative inten…
To apply the surface barrier to reduce hydrogen permeation, the influence of the surface barrier on both the permeation and retention has been investigated considering physical and chemical stability of the barrier in fusion environment. Since energetic hydrogen from the plasma not only impinges directly into subsurfa…
Abstract The morphology and dynamic mechanical properties of blends of poly(ether imide) (PEI) and nylon 66 over the full composition range have been invesigated. Torque changes during mixing were also measured. Lowertorque values than those calculated by the log‐additivity rule were ontained, resulting from the slip…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemical Generation of Bicyclo[4.2.2]decapentaene from [4.2.2]Propellatetraene. Experimental and Theoretical Study of the .pi.-Bond-Shift Isomers of Bicyclo[4.2.2]decapentaene, [4]Paracyclophane-1,3-diene, and 1,6-Ethenocycloocta-1,3,5,7-tetraeneTakashi Tsuji, Shinya Ni…
Abstract The effect of pigments of different chemical compositions on the crystellization process of PP was studied by means of differential scanning calorimetry in isothermal mode. The Avrami equation was applied to obtain the crystallization parameters of polypropylene with different pigments. Lipatov's equations we…
Ce‐TZP and Y‐TZP ceramics were heat‐treated for various times and temperatures in order to vary the microstructure. Flaw tolerance was investigated using the indentation–strength test. Reliability was quantified using conventional two‐parameter Weibull statistics. Some Ce‐TZP specimens were indented at slightly elevat…
We analytically show the exponential convergence of the sinc method applied to fourth-order ordinary differential equations (ODEs). Linear numerical examples are included to confirm our analytical results. The solution obtained with the sinc method is compared with the one obtained with a second- and a sixth-order fin…
The Combined Electrolysis Catalytic Exchange (CECE) process, utilizing AECL’s wetproofed catalyst, is ideally suited for extracting tritium from water because of its high isotopic separation factor and near-ambient operating conditions. Several CECE options are compared with the more conventional DW-VPCE arrangements…
Fresnel reflection amplitude coefficients (fractional amplitudes) at the surface of an isotropic, intrinsically nonmagnetic chiral medium are derived on the basis of the Drude–Condon model of optical activity. The eigenvalue–eigenvector solution is obtained with use of Berreman’s 4 × 4 matrix method. Self-consistent r…
Pentaerythritol [2,2-bis(hydroxymethyl)-1,3-propanediol], C(CH 2 OH) 4 , tetragonal, I4, Z = 2, a = 6.0752 (8), c = 8.733(2)A at T=291K and 0.1 MPa, has been studied at high pressures by X-ray diffraction. The pressure dependence of the unit-cell dimensions has been measured to 1.15 GPa, and the crystal structure has…
The structure of the orientational wetting layer of semiflexible polymers in the vicinity of a hard-wall surface is investigated based on an inhomogeneous free energy functional. A mean-field approximation is used for the system of semiflexible polymers obeying the Saito-Takahashi-Yunoki description and interacting vi…
Based on the experimental observation of cubic-to-tetragonal transition of low-carbon martensite, we perform a long-wavelength approximation for the stress-induced elastic interaction in the theory of microscopic elasticity. Taking into account the elastic anisotropy and the tetragonal character of the octahedral inte…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of Nanosize Latexes by Reverse Micelle PolymerizationA. Hammouda, Th. Gulik, and M. P. PileniCite this: Langmuir 1995, 11, 10, 3656–3659Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published inissue 1 October 1995https://pub…
Polymer reference interaction site model (PRISM) theory with the Percus–Yevick closure approximation has been applied to investigate the intermolecular correlations, effective chi-parameters, and spinodal phase separation of athermal binary polymer blends. These model mixtures are composed of structurally asymmetric s…
Abstract The esterification of the hydroxyl group of starch with DuPont Surlyn was considered as pretreatment method of starch before blending with polyolefins. In treating starch with Surlyn, two different raction conditions were taken to optimize reaction conditions. First, the esterification reaction was carried ou…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and Thermodynamic Properties of Charged Silica DispersionsJeanne Chang, Pierre Lesieur, Michel Delsanti, Luc Belloni, Cecile Bonnet-Gonnet, and Bernard CabaneCite this: J. Phys. Chem. 1995, 99, 43, 15993–16001Publication Date (Print):October 1, 1995Publication His…
Raman spectra of the oxidized and neutral forms of polypyrrole show a relative intensity shift from the high wave number region to the low wave number region as the source wavelength is increased from 514.5 to 1064 nm. Variations in band positions are also observed with changes in excitation source; particularly, two…
Abstract This paper reviews the numerical, self‐consistent field theory of block copolymers and blends in which they are a major component, and the relationship of this approach to analytic theories of the weak and strong segregation limits. The major topics of interest are microphase separation and, in blends, its in…