Optical microscopic,X-ray diffraction,and electrical resistance studies of CuCl at high pressure

Electrical resistance and X-ray diffraction measurements and also optical observations under a polarizing microscope were made on CuCl to pressures in excess of 12.5 GPa at room temperature using a diamond anvil cell. Resistance measurements were also performed in a piston-cylinder apparatus to pressures of approximately 5.5 GPa at room temperature. Three samples of CuCl prepared by different methods were examined. No anomalous pressure dependence in electrical resistance was found in the pressure range studied, and no dramatic changes in optical transmission were observed up to pressures of approximately 10.0 GPa. Optical observations and X-ray diffraction measurements indicate the existence of four phases in the pressure range studied, including a nonconducting black opaque phase which grows with time when CuCl is left for several days at the highest pressures.     

Rotational spectra of DCCCN in some excited vibrational states

We have observed and analyzed the millimeter-wave spectrum of deuterated cyanoacetylene (DCCCN) in 12 excited vibrational states. The Hamiltonian of K. M. T. Yamada, F. W. Birss, and M. R. Aliev (J. Mol. Spectrosc. 112, 347–356 (1985)) has allowed the determination of accurate rotational and l-type doubling constants for the following isolated states: (v₄, v₅, v₆, v₇) = (1001), (0001), (0002), (0003), (0010), (0100), (0101), (0011), and 0012). The anharmonic resonance between the (1000), (0020), and (0004) states has been observed and analyzed, yielding the unperturbed rotational constants and the Fermi interaction constant.     

Les réactifs de l'analyse minérale moderne dans la chimie de l'azote organique

Résumé L'auteur introduit les réactifs de l'analyse minérale moderne dans la chimie de l'azote organique par substitution des cations organiques aux cations minéraux. L'exemple proposé applique un réactif de Cu á l'isolement de l'éphédrine; la limite de sensibilité de cet isolement á froid passe ainsi de 5000g á 20g/ml sans que les pertes dépassent 2%.Seconde originalité de ce travail: l'emploi, pour le contrôle de cet isolement, d'une réaction d'addition á intensité compensée: dans le milieu oú apparaît le composé d'additionA (B) n, n augmente systématiquement par diminution de [A].

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Summary The reagents employed in modern inorganic analysis have been now introduced into the chemistry of organic nitrogen compounds by substitution of organic cations for the inorganic cations. For example a reagent for copper is applied for the isolation of ephedrine. The sensitivity limit of this isolation in the cold exceeds 5000g at a concentration of 20g/ml and the loss does not exceed 2%.

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Zusammenfassung Reagenzien der modernen anorganischen Analyse lassen sich für organische Stickstoffbasen heranziehen, die als Kationen an die Stelle anorganischer Kationen treten. So eignet sich zum Beispiel ein Reagens für Kupfer zur Abscheidung von Ephedrin; die Nachweisempfindlichkeit wird so in der Kälte von 5000 auf 20g/ml verbessert, ohne daß der Verlust 2% übersteigt. Eine weitere Eigentümlichkeit dieses Nachweisverfahrens ist darin zu sehen, daß mit zunehmender Bildung des AdditionsproduktesA(B) n der Wertn durch Minderung der Konzentration vonA erhöht wird.

     

Une propriété inconnue du réactif de Mayer

Zusammenfassung Auf Grund eines Vergleiches von Alkaloidreagenzien wird eine bisher unbekannte Eigenschaft des Mayerschen Reagens dargelegt. Die Alkaloide lassen sich damit nach vier Kategorien unterscheiden. Die qualitative und quantitative Anwendung wird beschrieben. Abgesehen von seiner Verwendung als allgemeines Alkaloidreagens ist diese Selektivität des Mayerschen Reagens bisher noch unausgenützt.

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Summary This paper reveals an unknown property of the Mayer reagent, drawn from a comparison of various alkaloid reagents. The Mayer reagent divided the alkaloids into four categories. This property permitted refined qualitative and quantitative applications in this study. As a general alkaloid reagent, Mayer's reagent thus combines with this generality a selectivity that has not been utilized heretofore.

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Résumé Cette publication expose une propriété inconnue du réactif deMayer, déduite d'une comparaison entre réactifs des alcaloides.A l'expérience, elle répartit les alcaloïdes en quatre catégories. Cette propriété permet des applications qualitatives et quantitatives esquissées dans ce travail.Réactif général des alcaloïdes, le réactif deMayer combine ainsi à cette généralité une sélectivité restée inexploitée à ce jour.

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Dédié à Monsieur le professeurA. A. Benedetti-Pichler à l'occasion do son 70ème anniversaire.     

New99mTc-diiodine substituted IDA derivative (DIIODIDA) for hepatobiliary imaging

A new diiodine substituted IDA derivative, 2,4-diiodine-6-methyl IDA (DIIODIDA) was synthesized and labeled with^99mTc. It was established that^99mTc-DIIODIDA had high radiochemical purity. Biodistribution and influence of bilirubin on^99mTc-DIIODIDA biokinetics has been studied in rats and compared to the corresponding results for^99mTc-SOLCOIODIDA. Related to^99mTc-SOLCOIODIDA,^99mTc-DIIODIDA has much better biliary exretion (55.18 versus 43.63%). No change of^99mTc-DIIODIDA biokinetics, under influence of bilirubin was noticed. Biliary excretion of^99mTc-SOLCOIODIDA has been reduced for about 60%. The protein binding of^99mTc-DIIODIDA and^99mTc-SOLCOIODIDA were also determined, using in vitro method of precipitation. These results showed that^99mTc-DIIODIDA hepatobiliary imaging agent is superior to the presently used^99mTc-monoiodine IDA derivatives.     

Composite Pt/(SnO2/C) and PtSnNi/C Catalysts for Oxygen Reduction and Alcohol Electrooxidation Reactions

Russian Journal of Electrochemistry - The electrodeposition of tin and tin-nickel on a highly dispersed carbon material is used to obtain composite supports. These composite supports were used in...