Thermodynamic Assessment of the Cu-Pt System

A CALPHAD assessment of the Cu-Pt system has been carried out. Two and four sublattice models were applied to describe the Gibbs free energies of ordered phases where the contribution of SRO is taken explicitly into account through the reciprocal parameters. The disordered fcc A1 and liquid phases were treated as substitutional solutions. A consistent set of parameters for the phases in the Cu-Pt system as obtained, and those parameters can satisfactorily reproduce the experimental phase equilibria and thermodynamic properties, such as enthalpies, activity of Cu, and long-range order parameters

Phase Behavior of Aqueous Na-K-Mg-Ca-CI-NO3 Mixtures: Isopiestic Measurements and Thermodynamic Modeling

A comprehensive model has been established for calculating thermodynamic properties of multicomponent aqueous systems containing the Na{sup +}, K{sup +}, Mg{sup 2+}, Ca{sup 2+}, Cl{sup -}, and NO{sub 3}{sup -} ions. The thermodynamic framework is based on a previously developed model for mixed-solvent electrolyte solutions. The framework has been designed to reproduce the properties of salt solutions at temperatures ranging from the freezing point to 300 C and concentrations ranging from infinite dilution to the fused salt limit. The model has been parameterized using a combination of an extensive literature database and new isopiestic measurements for thirteen salt mixtures at 140 C. The measurements have been performed using Oak Ridge National Laboratory's (ORNL) previously designed gravimetric isopiestic apparatus, which makes it possible to detect solid phase precipitation. Water activities are reported for mixtures with a fixed ratio of salts as a function of the total apparent salt mole fraction. The isopiestic measurements reported here simultaneously reflect two fundamental properties of the system, i.e., the activity of water as a function of solution concentration and the occurrence of solid-liquid transitions. The thermodynamic model accurately reproduces the new isopiestic data as well as literature data for binary, ternary and higher-order subsystems. Because of its high accuracy in calculating vapor-liquid and solid-liquid equilibria, the model is suitable for studying deliquescence behavior of multicomponent salt systems

Contribution à la faune des Carabiques du Caucase. V. Note sur les espèces réunies sous le nom de Carabus protensus Schaum [Col. Carabidae]

Kurnakov V. N. Contribution à la faune des Carabiques du Caucase. V. Note sur les espèces réunies sous le nom de Carabus protensus Schaum [Col. Carabidae]. In: Bulletin de la Société entomologique de France, volume 75 (5-6), Mai-juin 1970. pp. 156-160

Contribution à la faune des Carabiques du Caucase. V. Note sur les espèces réunies sous le nom de Carabus protensus Schaum [Col. Carabidae]

Kurnakov V. N. Contribution à la faune des Carabiques du Caucase. V. Note sur les espèces réunies sous le nom de Carabus protensus Schaum [Col. Carabidae]. In: Bulletin de la Société entomologique de France, volume 75 (5-6), Mai-juin 1970. pp. 156-160

SIGNIFICANCE OF DOPPLER-GRAPHIC RESEARCHES FOR DIAGNOSTICS OF PROSTATE CANCER

An analysis of the Doppler-graphic results was made in transrectal ultrasound in 98 patients. Prostate cancer was detected in 44 cases. Priority zones for bioptic injection were determined. There were high probabilities of adenocarcinoma detection. The index of systolic speed of blood flow is significant for diagnostics