Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImproved Resolution and Very High Sensitivity in MALDI TOF of Matrix Surfaces Made by Fast EvaporationOle. Vorm, Peter. Roepstorff, and Matthias. MannCite this: Anal. Chem. 1994, 66, 19, 3281–3287Publication Date (Print):October 1, 1994Publication History Published online1 M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnzymes and Other Proteins Entrapped in Sol-Gel MaterialsDavid Avnir, Sergei Braun, Ovadia Lev, and Michael OttolenghiCite this: Chem. Mater. 1994, 6, 10, 1605–1614Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published inissue 1 Octob…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Characterization of Layered Silicate-Epoxy NanocompositesPhillip B. Messersmith and Emmanuel P. GiannelisCite this: Chem. Mater. 1994, 6, 10, 1719–1725Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published inissue 1 Octo…
Owing to the steric bulk of the tert-butyl groups, the reactivity of the novel porphyrin 1, which has a nonplanar macrocyclic framework, deviates distinctly from that of any other known porphyrin. For example, prolonged treatment of 1 in HClO4/MeOH leads to formation of 5,15-dihydroporphyrin (“porphodi-methene”) 2.
The triplet lifetimes of the ethynyl-bridged binuclear RuII complexes 1 (m = 0, 1; n = 1, 2) are significantly longer than that of the parent mononuclear complex, despite much lower triplet energies. This effect, which arises from electron delocalization over an extended π* orbital, decreases upon removal of the secon…
Brizziite is a new sodium antimonate mineral from the Cetine mine, Tuscany, Italy. It occurs as dense aggregates of platy {001} hexagonal crystals. Associated minerals are stibiconite and mopungite. The crystals, which are polysynthetically twinned, are colourless and transparent, with pearly lustre. Electron micropro…
The white mica crystallinity index has been analyzed as a function of the following parameters: 1) the domain size, 2) lattice distortion, and 3) the presence of other phyllosilicates overlapping the 10 A XRD peak, particularly I/S mixed-layer. (2) is determined by the variance method suggested by Wilson (1963) and su…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
The structures of the major folding intermediate, the transition state for folding, and the folded state of barnase have been previously characterized. We now add a further step toward a complete picture of the folding of barnase by reporting the backbone 15N, 13C, and 1H NMR assignments for barnase unfolded at pH 1.8…
We have cloned a mouse cDNA that is a member of the Krox gene family and encodes a protein we have named c-Krox. The c-Krox protein contains three zinc fingers of the Cys2His2 type. c-Krox binds specifically to a guanine-rich cis-acting element present twice in the promoter element of the mouse alpha 1(I) collagen gen…
Abstract Di(2‐ethylhexyl), di(2‐octyl), dihexyl, and dibutyl furan‐2,5‐dicarboxylate were synthesized from furfural and characterized for their plasticizing abilities toward PVC by dynamic mechanical thermal analysis (DMTA) with di(2‐ethylhexyl) phthalate (DOP) as the standard of reference. DMTA gave values for the de…
Abstract Aluminum hydroxide was used as a reactive filler to elastomers prepared from poly(oxypropylene)glycol (PPG), 2,4‐tolylene diisocyanate (TDI), and 1,4‐butane diol (BD). Mechanical properties, dynamic mechanical properties, and thermal properties were measured. Morphologies were observed by use of X‐ray diffrac…
Abstract The crystallization and melting behaviors of poly(aryletheretherketone) (PEEK) films were investigated, using differential scanning calorimetry and metallurgy concepts. The shape of the time–temperature–transformation (TTT) diagram, established for PEEK, results from both nucleation and growth phenomena. The…
We use molecular beam epitaxy to grow MgO of high structural quality with buried tracer layers for diffusion measurement. The diffusion observed on both sublattices is in good accord with predictions for the existing impurity content; on the anion sublattice the rates slightly exceed the theory for bound Schottky pair…
We report on the optical conductivity of the structurally ordered icosahedral quasicrystal ${\mathrm{Al}}_{70}$${\mathrm{Pd}}_{20}$${\mathrm{Re}}_{10}$ and the crystal ${\mathrm{Al}}_{2}$Ru obtained from the reflectance measured over a wide frequency range. Our results show that both the crystal and the quasicrystal a…
The projected atomic structure of the $\ensuremath{\alpha}\ensuremath{-}{\mathrm{Al}}_{2}{\mathrm{O}}_{3}(0001)(\sqrt{31}\ifmmode\times\else\texttimes\fi{}\sqrt{31})R\ifmmode\pm\else\textpm\fi{}9\ifmmode^\circ\else\textdegree\fi{}$ reconstruction has been analyzed by means of the grazing incidence x-ray diffraction te…
Raman scattering has been used to measure phonon linewidths and frequencies of a number of high quality diamond crystals. It was found that the defect induced broadening produced a Lorentzian line shape. The smallest Lorentzian linewidth of 1.68 cm−1 at 300 K caused by anharmonicity and defects was obtained for the hi…
The magnetic susceptibility of the tungsten intermediary oxides WO 3-x (0.05<or=x<or=0.28) with the crystal shear and pentagonal column structures was measured using the Faraday method. A feeble temperature-independent paramagnetic component chi (e) of the total susceptibility was present in each case. Using the Pauli…