Materials Literature
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Abstract The surface free energy of Ca-montmorillonite has been determined from measurement of the contact angle of water on an oriented deposit immersed in n -alkanes; the oriented deposits were equilibrated at different relative humidities. These experiments provided the polar, γ S P , and dispersive, γ S D , compon…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTMemory of spin polarization in triplet-doublet systemsTakashi Imamura, Osamu Onitsuka, and Kinichi ObiCite this: J. Phys. Chem. 1986, 90, 26, 6741–6744Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1 December 1986https://…
The liquid crystalline compounds having an optically active 1-methyl-alkoxy-phenyl group were synthesized. They show some abnormality, i.e., firstly rather high value of spontaneous polarization for the structural feature lacking a strongly polar group, in the vicinity of the chiral center, and secondly the sense of t…
Abstract A study to investigate the role of nitrogen in improving the pitting corrosion resistance of types 316 and 304 stainless steel weld metals has been attempted. Weld metals were prepared by autogenous TIG welding process with argon‐nitrogen mixture as the shielding gas. Delta‐ferrite measurements, made with Mag…
Heme d1 is the noncovalently associated heme prosthetic group of the bacterial nitrite reductase known as cytochrome cd1. Additional evidence has been obtained in support of a dioxoisobacteriochlorin, or 1,3-porphyrindione, skeleton for this heme. The new data include the natural abundance 13C NMR spectrum of the free…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeterolytic and homolytic oxygen-oxygen bond cleavage reactions of acylperoxomanganese(III) porphyrinsJohn T. Groves and Yoshihito WatanabeCite this: Inorg. Chem. 1986, 25, 27, 4808–4810Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Pu…
Abstract The acidic aqueous solution of imogolite is proposed to be an ideal lyotropic system. No temperature dependence was marked on the two phase boundary concentrations (A and B points) of imogolite solutions as predicted by the theories of Flory and Onsager. A satisfactory quantitative agreement was observed with…
An elasticity solution is utilized to analyze an orthotropic fiber in an isotropic matrix under uniform thermal load. The analysis reveals that stress distributions in the fiber are singular in the radial coordinate when the radial fiber stiffness (Crr) is greater than the hoop stiffness (Cθθ). Conversely, if Crr <…
The effect of the nature of the oil phase of w/o/w emulsions stabilized by interfacial complexation between span 80 (sorbitan mono-oleate) and albumin has been studied. The long-term stability of the systems has been assessed by photomicrography and by measuring the quantity of an internal marker (NaCl) remaining entr…
High-resolution heat-capacity, tilt-angle, and polarization measurements have been carried out in the vicinity of the smectic-A (SmA) --chiral-smectic-C (Sm${C}^{\mathrm{*}}$) phase transition of p-(n-decyloxybenzylidene)-p-amino-(2-methylbutyl)cinnamate (DOBAMBC). Heat-capacity studies were done on two different samp…
A mechanical model for the lateral compression of woven fabrics is derived from Van Wyk's compression law for fiber assemblies. The pressure ( P) and thickness (v) relationship is P = a/( v - v')3. The parameter v' refers to the core of the fabric, which is incompressible over the pressure range 2-5000 gf/cm 2 . The p…
The energy and atomic structure of {1121}, {1122) and {1012} twin boundaries in the hexagonal-close-packed (h.c.p.) metals have been investigated using computer simulation. Three distinctly different interatomic potential functions have been used in either equilibrium or non-equilibrium form. It is predicted that only…
Albumin-(gadolinium-diethylenetriaminepentaacetic acid), albumin-(Gd-DTPA), a macromolecular MR contrast agent designed for intravascular distribution, was compared with gadolinium-diethylenetriaminepentaacetic acid (Gd-DTPA), an extracellular fluid agent, for imaging characteristics in normal rats at 2.0 T. Albumin-(…
"An Introduction to Nuclear Reactor Theory." Nuclear Technology, 75(3), p. 378
A computer-aided measurement system has enabled novel interpretation of partial discharge (PD) signals. We take into consideration voltage phase-angle at which each PD pulse takes place, and consequently need simultaneous measurement of the pulse height q and the phase angle ϕ. According to the analysis of PD pulse si…
A combination of two-atom and three-atom interactions has been selected to represent the structural chemistry of sulfur. This model potential exhibits divalency (bond saturation) and leads to the known preference for Sn molecules to form puckered ring structures. Using this representation of the interactions, molecula…
The problem of deriving an optimal set of thermodynamic properties of minerals from a diverse experimental data base is reviewed and a preferred methodology proposed. Mathematical pro-gramming(MAP) methods extend the linear programming (LIP) approach first presented by Gordon (1973), and make it possible to account fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical procedure for preparing surface-enhanced Raman scattering active silver filmsFan. Ni and Therese M. CottonCite this: Anal. Chem. 1986, 58, 14, 3159–3163Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1 Decembe…
Abstract In the presence of oxygen and visible light, various synthetic water‐soluble porphyrins cleave pBR 322 plasmid supercoiled DNA (form I) producing relaxed (form II) and linear (form III) DNA corresponding to single‐strand and double‐strand breaks respectively. Large variations are observed in the efficiency of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganoiron electron-reservoir complexesDidier AstrucCite this: Acc. Chem. Res. 1986, 19, 12, 377–383Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1 December 1986https://pubs.acs.org/doi/10.1021/ar00132a001https://doi…