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It is well known from experiments in acoustic cavitation that two bubbles pulsating in a liquid may attract or repel each other depending on whether they oscillate in or out of phase, respectively. The forces responsible for this phenomenon are called ‘Bjerknes’ forces. When attractive forces are present the two bubbl…
Nanometer‐sized semiconductor particles are currently being intensively investigated in many fields of physics and chemistry—especially since the discovery of visible luminescence in porous silicon. This is one of the first papers to concentrate on the synthesis of IV – IV nanoparticles. A purely wet‐chemical room‐tem…
Precise first-principles spin-polarized total-energy and band-structure calculations have been performed for the zinc-blende Mn chalcogenides with the use of the local-spin-density (LSD) approach. We find that the LSD is capable of identifying the correct magnetic-ground-state structure, but it overestimates the order…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSFG study of two-dimensional orientation of surface methyl groups on cadmium arachidate Langmuir-Blodgett filmsNaotoshi Akamatsu, Kazunari Domen, and Chiaki HiroseCite this: J. Phys. Chem. 1993, 97, 39, 10070–10075Publication Date (Print):September 1, 1993Publication History…
We studied the effect of counterion type on the ac impedance and linear sweep voltammetry response of a film consisting of Os(bpy)<sub>2</sub> (bpy indicates 2,2′-bipyridal) coordinatively bound in PVP (poly(4-vinylpyridine)). Four acids were used at 0.1 M in the aqueous bathing electrolytes: hydrochloric, perchloric,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible light-stimulated activation and deactivation of .alpha.-chymotrypsin by its immobilization in photoisomerizable copolymersItamar Willner, Shai Rubin, Ronith Shatzmiller, and Tsaffrir ZorCite this: J. Am. Chem. Soc. 1993, 115, 19, 8690–8694Publication Date (Print):…
Review of Maxwell equations and units classical principles of magnetism introduction to magnetism free magnetic energy phenomenological theory electrical properties of magnetic films Kramers-Kronig relations electromagnetic wave propagation in magnetic films magnetic surface boundary conditions matrix representation o…
The motion of two gas bubbles in response to an oscillatory disturbance in the ambient pressure is studied. It is shown that the relative motion of bubbles of unequal size depends on the frequency of the disturbance. If this frequency is between the two natural frequencies for volume oscillations of the individual bub…
Abstract λ(BEDT-TSF)2GaCl4 has revealed to be a new organic superconductor, where BEDT-TSF is bis(ethylenedithio)tetraselena-fulvalene. The onset temperature of the superconducting transition was about 9.5 K and the mid-point transition temperature (Tc) was 8 K. The crystal belongs to triclinic system. BEDT-TSF molecu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn ab initio MO study of the thermal decomposition of chlorinated monosilanes, SiH4-nCln (n = 0-4)Ming Der Su and H. Bernard SchlegelCite this: J. Phys. Chem. 1993, 97, 39, 9981–9985Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Publi…
Abstract In this paper, the Monte Carlo method for numerically simulating the kinetics and chain‐length distribution in radical polymerization is described. Because the Monte Carlo method is not subject to the assumption of steady‐state, it is particularly suitable for studying the kinetic behaviour before the steady‐…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMono(cyclopentadienyl)titanium complexes as initiators for the living ring-opening polymerization of .epsilon.-caprolactoneJun Okuda and Ilya L. RushkinCite this: Macromolecules 1993, 26, 20, 5530–5532Publication Date (Print):September 1, 1993Publication History Published on…
Monomethoxypolyethylene glycol (mPEG) of average molecular weight 5000 was transformed in a series of synthetic steps to a new activated form of PEG, a stable thiol-protected intermediary, for reaction with cysteine residues in proteins under mild conditions to produce PEG--protein conjugates as possible candidates fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTopology and maximum content of isolated species (Al, Ga, Fe, B, Si, ...) in a zeolitic framework. An approach to acid catalysisD. BarthomeufCite this: J. Phys. Chem. 1993, 97, 39, 10092–10096Publication Date (Print):September 1, 1993Publication History Published online1 May…
The catalytic subunit of cAMP-dependent protein kinase expressed in Escherichia coli is a phosphoprotein. By in vivo labeling with [32Pi]orthophosphate, the sites of phosphorylation were identified as Ser-10, Ser-139, Thr-197, and Ser-338. Two of these sites, Thr-197 and Ser-338, are found in the mammalian enzyme (Sho…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsothermal thickening and thinning processes in low-molecular-weight poly(ethylene oxide) fractions crystallized from the melt. 4. End-group dependenceStephen Z. D. Cheng, Scott S. Wu, Jianhua Chen, Qizhou Zhuo, Roderic P. Quirk, Ernst D. von Meerwall, Benjamin S. Hsiao, Ant…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRemoval of nitrogen monoxide on copper ion-exchanged zeolites by pressure swing adsorptionWen Xiang Zhang, Hidenori Yahiro, Noritaka Mizuno, Jun Izumi, and Masakazu IwamotoCite this: Langmuir 1993, 9, 9, 2337–2343Publication Date (Print):September 1, 1993Publication History…
Abstract Dispersion of clay affects soil physical properties and can result in clay transport with surface runoff or with percolating water moving through soil macropores. The water‐dispersihle fine clay (<0.2 µm) is probably the most mobile fraction with percolating water. This study was conducted to characterize…
A new type of passivity in carbon (C) steels that occurs in the correct range of carbon dioxide (CO2) bicarbonate (HCO3–), sodium chloride (NaCl), and potential was discovered. C steels normally become passive at about -0.65 VSCE in sodium bicarbonate (NaHCO3) solutions. In sodium chloride (NaCl) solutions, pitting oc…
Six samples of congruently melting lithium niobate (∼Li0.95Nb1.01O3) have been examined by powder x-ray diffraction for the occurrence of niobium antisite defects (niobium on lithium sites). Contrary to current thinking, we have found no evidence for the occurrence of high concentrations of such defects, which also re…