Materials Literature
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The Clostridium cellulovorans cellulosome is comprised of a large, nonenzymatic scaffolding protein called the cellulose binding protein A (CbpA) and a number of endoglucanases/xylanases. The CbpA contains several functional domains, including a signal peptide, a cellulose binding domain (CBD), a hydrophilic domain (H…
The discovery of a new magnetic field induced phase transition between the space-modulated spin structure (SMSS) and the homogeneous antiferromagnetic state (HAFS) is reported. This phase transition is accompanied by large magnetoelectric (ME) anomalies. It is well known that BiFeO, shows the ferroelectric ordering (T…
Sulfonated polyaniline (SPAN) was synthesized by sulfonation of polyaniline (PANI) base with fuming sulfuric acid. Thin films were cast from polymer solutions in basic media. The polymer films were characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymer-like lecithin reverse micelles. 1. A light scattering studyP. Schurtenberger and Carolina CavacoCite this: Langmuir 1994, 10, 1, 100–108Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1 January 1994https://doi.o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyrotaxanes based on polyurethane backbones and crown ether cyclics. 1. SynthesisY. X. Shen, D. Xie, and H. W. GibsonCite this: J. Am. Chem. Soc. 1994, 116, 2, 537–548Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1…
This paper presents the magneto-structural study on orthoferrite TmFeO3 and Sm substituted TmFeO3 across spin reorientation transition (SRT) temperature. A strong change in magnetic anisotropy due to the substitution of the Sm3+was observed, which is reflected as a change in spin reorientation transition (SRT) tempera…
Large 1H chemical shifts are suggestive of protonic superacidity of sulfated zirconia catalysts, this property being related to the structure of surface sulfate species.
Nitrogen adsorption isotherms have been measured on a series of aluminosilicate and titanosilicate MCM-41 Molecular sieves, whose mean pore radius varied from ca. 0.9 to ca. 2 nm. By means of comparison plots the nature of the adsorption on these materials was found to depend strongly on their pore size. With pores of…
The adsorption of low-molecular-weight polyacrylic acid (Mr= 2000) on zirconia has been studied as a function of pH. In this study, an atomic force microscope (AFM) was used to monitor directly the changes in polymer conformation at the solid/water interface. Force–distance profiles were obtained at AFM scan rates equ…
Evidence is presented on the harmful impact of a diatom (Thalassiosira rotula) on the reproductive biology of the copepod Calanus helgolan&cus. When adult females were fed the &atom, both total egg production and hatching success were significantly lower than with the dinoflagellate Prorocentrum minimum. Embryonic dev…
The synthesis and characterisation of the dodecanuclear nickel complex, [Ni12(O2CMe)12(chp)12(H2O)6(THF)6](where chp = the anion of 6-chloro-2-pyridone) is described; structure determination shows formation of a metallocycle, while magnetic studies indicate ferromagnetic coupling between the nickel(II) ions within the…
The formation of photostimulated luminescence (PSL) centers in BaFBr:Eu 2+ single-crystal phosphors is studied in the 5–9 eV vacuum ultraviolet region. The centers are efficiently formed by the Eu 2+ photoionization absorption at 6.6 eV. The PSL excitation spectrum after the photoionization excitation is almost the sa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase behavior of blends of linear and branched polyethylenes in the molten and solid states by small-angle neutron scatteringR. G. Alamo, J. D. Londono, L. Mandelkern, F. C. Stehling, and G. D. WignallCite this: Macromolecules 1994, 27, 2, 411–417Publication Date (Print):Ja…
Viscosity and yield stress measurements of A1 2 O 3 slurries containing high concentrations of electrolyte are reported. Contrary to what is expected from DLVO theory, the particles in coagulated slurries produced in this way are held together by weaker forces than particles in slurries brought to the isoelectric poin…
The self-assembly of the complementary components AP2 and AU2, through hydrogen bonding via uracil and 2,6-diacylaminopyridine groups, yields polymeric supramolecular rigid rods (AP2, AU2)n that present a lyotropic mesophase.
A Crystalline mesoporous member of the MCM-41 family has been synthesised with a Si : Al ratio as low as 8.5 : 1, without observing octahedral aluminium.
The use of surfactants as templates allows the synthesis of mesostructured transition-metal oxides by a cooperative, interface controlled condensation process.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolystyrene-poly(methacrylic acid) block copolymer micellesAnwei Qin, Minmin Tian, C. Ramireddy, Stephen E. Webber, Petr Munk, and Zdenek TuzarCite this: Macromolecules 1994, 27, 1, 120–126Publication Date (Print):January 1, 1994Publication History Published online1 May 2002…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPlatinum complex [(en)Pt(uracilate)]44+: a metal analog of calix[4]arene. Similarities and differences with classical calix[4]arenesHolger Rauter, Edda C. Hillgeris, Andrea Erxleben, and Bernhard LippertCite this: J. Am. Chem. Soc. 1994, 116, 2, 616–624Publication Date (Prin…
Synroc is an advanced titanate ceramic comprising an assemblage of phases chosen for their compatibility, geological/geochemical stability and collective ability to immobilise the various elements and radionuclides present in high-level nuclear wastes. A major technical advantage of the Synroc strategy is that it poss…