Materials Literature
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Measurement of the transport properties of single-crystal ${\mathrm{La}}_{0.86}{\mathrm{Sr}}_{0.14}{\mathrm{MnO}}_{3}$ as a function of temperature under different hydrostatic pressures $P<~18\mathrm{kbars}$ has revealed a discontinuous change in the ferromagnetic Curie temperature ${T}_{c}$ at $P\ensuremath{\appro…
Precise resonant experiments on ${\mathrm{Fe}}_{8}$ magnetic clusters have been conducted down to 1.2 K at various tranverse magnetic fields, using a cylindrical resonator cavity with 40 different frequencies between 37 and 110 GHz. All the observed resonances for both single crystal and oriented powder have been fitt…
High-energetic particle irradiation of carbon structures containing a graphite-diamond interface can lead to low-pressure diamond growth. A theoretical model predicting irradiation-induced diamond growth has been presented in a previous paper [Zaiser and Banhart, Phys. Rev. Lett. 79, 3680 (1997)]. In the present study…
Previous papers have reported on various silane based pretreatments which can replace the phosphate and chromate based systems currently used for corrosion protection of metals in applications where such metals are used in the unpainted or powder painted state. The present paper reports for the first time on the perfo…
Chiral nematic materials with reversibly controlled helical pitch are synthesized here and their photo-optical properties are investigated. Selective light reflection in the green region is observed and patterns such as that shown in the Figure can be recorded. High fatigue resistance is also demonstrated for these ma…
Gene therapy has yet to achieve reproducible clinical efficacy, due to inadequate gene delivery, inadequate gene expression, or dose-limiting toxicity. We have developed a gene therapy technology for tissue repair and regeneration that employs a structural matrix for DNA delivery. The matrix holds the DNA vector at th…
Abstract The value of a Cryo SEM system, attached to a conventional SEM, has already been demonstrated in the biological, pharmaceutical, oil, paint, plastics and food industry. Specimens are first rapidly frozen to below -160°C, transferred under vacuum to a cryo preparation chamber, fractured and examined at low KV…
Abstract Electron energy-loss spectrometry and energy-filtered imaging allow the possibility of detecting, quantifying and mapping of boron. Boron spatial distribution in biological tissue is of particular interest for boron neutron capture therapy (BNCT) for cancer. We have studied the limits of boron quantification…
Abstract The decomposition of dichloromethane (CH2Cl2) in model air gases (concentration, around 100 ppm) by electron beam (EB) and γ-ray irradiation was studied using batch-type glass reactors of 500 ml volume. The addition effect of water on the decomposition was also investigated. In dry air, one-pass EB irradiatio…
Article Analytical Determination of Water Effects on the Anodic Dissolution of Aluminum in Nonaqueous Electrolytes was published on August 1, 2000 in the journal Reviews in Analytical Chemistry (volume 19, issue 3-4).
We propose an indirect approach to the generation of a two-dimensional quasiperiodic (QP) pattern in convection and similar nonlinear dissipative systems where a direct generation of stable uniform QP planforms is not possible. An eightfold QP pattern can be created as a broad transient layer between two domains fille…
ADVERTISEMENT RETURN TO ISSUEPREVNoteSynthesis of Poly(3-hydroxybutyrate) by Ralstonia eutropha in the Presence of 13C-Labeled Ethylene GlycolDevang T. Shah, Pierre A. Berger, Minhtien Tran, Jawed Asrar, Leigh A. Madden, and Alistair J. AndersonView Author Information Monsanto Co., 800 N. Lindbergh Blvd., St. Louis, M…
We investigate the elastic behavior of highly swollen hexagonal phases. These systems consist of oil cylinders of radius R up to 17 nm, coated with a surfactant monolayer and closely packed on a triangular lattice in water. We perform creep tests experiments: upon application of a small stress, polycrystalline samples…
The ordering in the assembly of biaxial molecules which interact pairwise via the dispersion force is investigated statistical-mechanically, where four kinds of liquid crystalline phase and phase transitions between some pairs of those phases are discussed in comparison with the existing theoretical results from the m…
The barocaloric effect reflects a new cooling principle at low temperatures without the need of liquefied gases nor magnetic fields as used in other cooling techniques. A pressure induced structural and/or magnetic phase transition is used to obtain a significant change in the system's entropy which leads to its cooli…
Symmetric, peripherally substituted dihydroxysilicon tetrapyrazinoporphyrazines 5 and 6 were synthesized by reacting the diiminoisoindolines 1 and 2 with SiCl 4 in pyridine as solvent at considerably low temperature followed by hydrolysis of the intermediate dichlorosilicon tetrapyrazinoporphyrazines 3 and 4. In addit…
Duplex stainless steel ([DSS] UNS S31260) was investigated with the ferrite-austenite microstructure to determine the formation, growth, and redox behavior of passive films in borate buffer solution (pH = 9.3). The mechanism of growth and thickness of passive films were investigated by electrochemical impedance spectr…
The maximum densities of holes generated by cation vacancies, as well as thermoelectric parameters of (Pb 1− x Sn x ) 1− y Te y solid solutions with tin content x in the range from 0.4 to 0.6, were investigated. It is shown that each vacancy produces four holes in the valence band and that only for small x can the con…
A general model of smoothing-induced distortions of an X-ray diffraction (XRD) peak is derived from theoretical analyses by convoluting a Savitzky–Golay (S.–G.) polynomial filter with the Gaussian, Lorentzian and pseudo-Voigt curves. This is based on the assumption that an XRD peak consists of five basic parameters an…
Dissipative Particle Dynamics (DPD) is employed to model the dynamics and rheology of polymer solutions, and suspensions of spherical particles with adsorbed polymers. Static and dynamic scaling relationships for the variation of radius of gyration and relaxation time with polymer chain length are reviewed, demonstrat…