Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunicationThe Role of Surface Area in the NO−Carbon ReactionJ. M. Calo, E. M. Suuberg, I. Aarna, A. Linares-Solano, C. Salinas-Martínez de Lecea, and M. J. Illán-GomézView Author Information Division of Engineering, Brown University, Providence, Rhode Island 02912 Deparamento de Quí…
Abstract The effects of morphology on mechanism of plastic deformation are investigated for binary blends of isotactic polypropylene and rubbery ethylene‐1‐hexene copolymers. In this work, plastic deformation developed during elongation is investigated by measuring light transmittance, electron microscopy, and ultraso…
Acid-soluble collagens were prepared from connective tissues in the abalone Haliotis discus foot and adductor muscles with limited proteolysis using pepsin. Collagen preparation solubilized with 1% pepsin contained two types of alpha-chains which were different in their N-terminal amino acid sequences. Accordingly, tw…
Formation of a regeneration blastema following limb amputation is believed to occur through a process of dedifferentiation. It has been suggested, however, that the cells contributed to the blastema by the stump muscle are satellite-like cells, rather than cells originated by dedifferentiation. We have previously show…
The twist transition of the radial configuration between two concentric spheres with rigid perpendicular anchoring at the surfaces is examined. We perform a stability analysis and derive a sufficient condition for the twist transition to take place. We show that even a small sphere inside a large one can stabilize the…
Electron spin resonance, magnetic circular dichroism, and optical absorption spectra of a paramagnetic ${\mathrm{Rh}}^{2+}$ complex are investigated in ${\mathrm{Rh}}^{3+}$ doped solution-grown NaCl single crystals. x irradiation of the crystals at 77 K followed by a warm-up to room temperature results in the formatio…
Abstract Partly as a result of the high solution viscosity of bacterial cellulose, carboxymethylcellulose (CMC) derived from this material exhibits shear‐thinning and thixotropic properties. With suitable sample treatment, the CMC solution shows gel‐like rheology suggesting the presence of a three‐dimensional network.…
Methods employing continuum approximation in describing the deformation of layered materials possess a clear advantage over explicit models. However, the conventional implicit models based on the theory of anisotropic continua suffers from certain difficulties associated with interface slip and internal instabilities.…
Abstract The melting and crystallization behavior of Vectra tm B950, a random liquid crystalline copoly(ester amide), was studied by differential scanning calorimetry (DSC). Nonisothermal experiments showed the existence of some interesting and peculiar transition behavior, which may depend on the crystallization cond…
Two strong peaks were observed in the electron energy loss spectra of polycrystalline AMoO3 (A=Sr and Ba) perovskites with metallic conductivities. One, observed at 1.7 eV, was attributed to plasmon loss originating from conduction electrons. This explains the reddish color observed. The other, located at ∼5 eV, was a…
Organic matter in Urbic Anthrosols often contains chemically and biologically inert organic carbon. This material, called black carbon (BC), originates from municipal wastes, coal‐mine deposits and/or fly ash. This black carbon needs to be differentiated from the other soil organic substances because of its very diffe…
It has been demonstrated that the “polycondensation” of poly(tetrahydrofuran)-diols with dibutlytin dimethoxide in bulk yields tin-containing poly(THF) macrocycles and not linear polycondensates. These macrocycles were characterized by 1H and 119Sn NMR spectroscopy, by elemental analyses, viscosity measurements and ma…
Article Surface Tension and Surface Segregation of Liquid Cobalt-Iron and Cobalt-Copper Alloys was published on May 1, 1999 in the journal International Journal of Materials Research (volume 90, issue 5).
Biopolímeros como polissacarídeos e proteínas, têm despertado interesse recentemente, como matérias primas para embalagens comestíveis e/ou biodegradáveis. Os materiais a serem desenvolvidos devem possuir boas propriedades mecânicas e aparência, para proteger e apresentar o produto embalado. Este trabalho teve como ob…
Mechanization of glass manufacture had just begun in 1898 but was accelerating. Notable advances were soon to be made in all branches of the industry, many of them in the United States, and have continued to the present day. M. J. Owens occupies a unique position as the inventor of the first successful fully automatic…
The crystallization kinetics of a glass based on one type of mica, NaMg 3 AlSi 3 O 10 F 2 , with the addition of a nucleating agent, TiO 2 , has been studied using differential thermal analysis (DTA) under both isothermal and nonisothermal conditions. Two distinct crystallization exotherms in the DTA curve are observe…
Epitaxial growth of PbSe/BaF2/CaF2 heterostructures was carried out by molecular beam epitaxy (MBE) on Si(111) wafers. Successful transfer of 3-μm-thick PbSe epilayers was accomplished by bonding the MBE-grown samples face down to polished copper plates followed by the removal of the silicon substrate by dissolving th…
A detailed comparison of the structures of aspartate aminotransferase, alanine race-mase, the beta subunit of tryptophan synthase, D-amino acid aminotransferase and glycogen phosphorylase has revealed more extensive structural similarities among pyridoxal phosphate (PLP)-binding domains in these enzymes than was obser…
The thermal behaviour of CdS nanoparticles and especially of their surfaces has been investigated by high resolution photoelectron spectroscopy. Different annealing characteristics were observed for particles of different sizes. From the changes of surface core-level shifts in the S 2p and Cd 3d5/2 spectra we derive t…
At 1050 ?C boron combines with sodium forming a boride of formerly unknown composition and crystal structure. The investigation of the homogeneous, monophasic, and crystalline powder was performed using X-ray (23 ?C) and neutron (–271.5 ?C) diffraction methods. The structure solution led to an unusual arrangement of b…