Materials Literature
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Reciprocating sliding friction experiments in humid air and in dry nitrogen and unidirectional sliding friction experiments in ultrahigh vacuum were conducted with a natural diamond pin in contact with microwave-plasma-deposited diamond films. Diamond films with a surface roughness (R rms) ranging from 15 to 160 nm we…
Work by previous investigators has shown that BaTiO 3 films can be synthesized from solution over temperature ranges from 80°C to greater than 200°C. In the present work, electrically insulating crystalline films of BaTiO 3 have been electrochemically deposited on titanium substrates at temperatures as low as 55°C. Au…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and ion selectivity of conformers derived from hexahomotrioxacalix[3]areneKoji Araki, Norifumi Hashimoto, Hideyuki Otsuka, and Seiji ShinkaiCite this: J. Org. Chem. 1993, 58, 22, 5958–5963Publication Date (Print):October 1, 1993Publication History Published online1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThird-order nonlinear optical properties of polymorphs of oxotitanium phthalocyanineHari Singh Nalwa, Toshiro Saito, Atsushi Kakuta, and Takao IwayanagiCite this: J. Phys. Chem. 1993, 97, 41, 10515–10517Publication Date (Print):October 1, 1993Publication History Published on…
A comprehensive thermodynamic model has been developed to determine the reaction conditions favoring hydro‐thermal synthesis of lead titanate (PbTiO 3 ). The model combines standard‐state thermodynamic data for solid and aqueous species and an excess Gibbs energy model to account for the nonideality of the solution. T…
As a result of their different symmetry, the four structural isomers of the title compound (the C4h isomer 1 is depicted on the right) could be characterized by 1H NMR spectroscopy. With these complexes the complete chromatographic separation of the four structural isomers of tetrasubstituted metal phthalocyanines was…
Light-induced charge separation, rapid intrarotaxane electron transfer over a short distance, migration of the two rotaxane components relative to each other, and a slow intrarotaxane electron transfer over a longer distance are the steps that enable molecular shuttle motion (see scheme on the right). Ferrocene, bipyr…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
A perovskitelike compound ${\mathrm{LaTiO}}_{3}$ shows insulating or barely metallic behavior depending on a slight (\ensuremath{\le}0.04) deviation of the Ti valence (+3) arising from nonstoichiometry of La and/or oxygen. In order to investigate electronic properties of the specimens in the very vicinity of the Mott…
The head-to-head self assembly of two [CoAgL2]3+ units in the solid state results in a tetranuclear complex (shown on the right), which is not held together by AgAg interactions, but by stacking interactions between pyridine rings. This and the preceeding communication show that supramolecular complex chemistry is bo…
We have studied the dielectric behavior in the antiferroelectric SmCA* phase of 4-(1-methyl-heptyloxycarbonyl)phenyl 4'-octyloxybiphenyl-4-carboxylate (MHPOBC). Two dielectric relaxations were recognized without a dc field in SmCA*. The lower-frequency relaxation is attributed to the rotation around the short axis of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterference of spinodal waves in thin polymer filmsGeorg Krausch, Chi An Dai, Edward J. Kramer, John F. Marko, and Frank S. BatesCite this: Macromolecules 1993, 26, 21, 5566–5571Publication Date (Print):October 1, 1993Publication History Published online1 May 2002Published…
The simulator solves for the temperature distribution within the semiconductor devices, packages, and heat sinks (thermal network) as well as the currents and voltages within the electrical network. The thermal network is coupled to the electrical network through the electrothermal models for the semiconductor devices…
Tirapazamine (SR 4233), a benzotriazine di-N-oxide, a potent and selective killer of hypoxic cells, is currently in Phase I clinical trials with the expectation that it will be combined with radiation therapy. However, because of the likelihood that hypoxic tumor cells may also be resistant to some commonly used chemo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron correlation in tetrapyrroles: ab initio calculations on porphyrin and the tautomers of chlorinJan Almlof, Thomas H. Fischer, Paul G. Gassman, Abhik Ghosh, and Marco HaeserCite this: J. Phys. Chem. 1993, 97, 42, 10964–10970Publication Date (Print):October 1, 1993Publ…
Mitogen-activated protein-kinase (MAP) kinase-activated protein kinases 1 and 2 (MAPKAP kinase-1, MAPKAP kinase-2), were found to phosphorylate bacterially expressed human tyrosine hydroxylase in vitro at comparable rates to other proteins thought to be physiological substrates of these protein kinases. The phosphoryl…
In the framework of the European project aimed at the sequencing of the Bacillus subtilis genome the DNA region located between gerB (314°) and sacXV (333°) was assigned to the Institut Pasteur. In this paper we describe the cloning and sequencing of a segment of 97 kb of contiguous DNA. Ninety-two open reading frames…
Use of thermoplastic olefin elastomers (TPO) is expected to enjoy a 12% annual growth worldwide through 1996. The majority of growth is in au tomotive applications such as bumper fascia, claddings, exterior panels, airbag covers and instrument panels, etc. This healthy forecast is fueled by the overall cost/performanc…
We have examined the spatio-temporal distribution of collagen type VI (Col VI) during neural crest development in vivo and its ability to promote neural crest cell attachment and migration in vitro. An affinity purified antiserum and chain-specific monoclonal antibodies against chicken Col VI were employed to immunolo…
4 GPa pressure, 600 °C, and a reaction time of 5 minutes—under these conditions LiSi can be prepared from the elements. Like the homologous silicides MSi (M NaCs), which have been known for a long time, LiSi also belongs to the Zintl phases. The Si− ions form a three-dimensional network in a structure comprising pu…