Emission spectra produced from thermal energy charge transfer reactions of Ar+ ions with CS and PN radicals

CS⁺(B²Σ⁺-A²Π_i) and PN⁺(B²Σ⁺-X²Σ⁺) emissions were observed for υ′ = 0 and 1 from argon afterglow reactions of CS and PN radicals. The rotational constant (B₀) of the CS⁺(B) state was estimated to be 0.696±0.002 cm^?1 from the difference between band head and band origin. The dependence of each emission intensity on the voltage applied to the ion-collector grids and on the argon pressure indicated that Ar⁺ was a plausible candidate. Vibrational populations of the CS⁺(B) and PN⁺(B) states obtained from the emission spectra shifted to lower vibrational levels in comparison with those expected from the energy resonance and Franck-Condon factors for ionization. This is explainable as the distortion of target radicals by approach of reactant ions.     

Emission Mössbauer spectroscopic studies on mixed-valence states of57Fe atoms produced in57Co-labeled trinuclear cobalt-iron carboxylates

Mixed-valence states of⁵⁷Fe-atoms produced after EC-decay of⁵⁷Co in oxo-centered trinuclear cobalt-iron carboxylates have been studied by means of emission Mössbauer spectroscopy. The emission Mössbauer spectra show nearly the same temperature dependence of the mixed-valence state as found in the absorption Mössbauer spectra of the corresponding trinuclear iron carboxylates. The results indicate that most of the decayed atoms keep their position at the sites of original⁵⁷Co atoms.     

Concurrent on-line sampling of melatonin in pineal microdialysates from conscious rat and its analysis by high-performance liquid chromatography with electrochemical detection

Dynamic changes of melatonin in microdialysates from the pineal gland of a freely moving rat were repeatedly determined by using on-line high-performance liquid chromatography with electrochemical detection. The detection limit for melatonin, ca. 5 pg, was well below that achieved with other systems. We observed a drastic increase of extracellular pineal melatonin during the transitional phase from the light period to the dark period. This application of microdialysis is a useful tool in the study of the physiological role of the mammalian pineal body.     

Sulfoacylated macro-porous polystyrene-divinylbenzene low-capacity cation exchanger selective for amino acids.

A low-capacity cation-exchange column was newly developed for the separation of amino acids. A highly cross-linked macro-porous polystyrene-divinylbenzene co-polymer was functionalized by a sulfoacylation reaction. The exchange capacity was controllable at the acylation step. The capacity between 55 and 60 micromol/column was adequate for the practical separations in acceptable retention times. The 5-microm base polymers having average pore diameters smaller than 3 nm gave satisfactory results, and those having 1.5-nm pore was most favorable. Several isocratic elution conditions at different pH values adjusted by phosphate buffer of mM order with or without acetonitrile could provide good separations for individual classes of amino acids, i.e., acidic, neutral, hydrophobic, and basic groups. The results provided fundamental data for constructing gradient elution systems required for the simultaneous separation of protein amino acids.     

A new strategy to sulfur heterocycles: Reactions of an allene episulfide with electrophiles

A variety of sulfur-containing five- and six-membered cyclic compounds was obtained by the acid-catalyzed and thermal reactions of an allene episulfide with various electrophiles.     

Die Schnell-kinematographische Analyse der flüssig-flüssigen Dispersion durch Hochdruck-Düsenspritzung des Petroleums in flüssigen Medien

Zusammenfassung 1. Die Schnellkinoaufnahme der Hochdruck-Düsenspritzung von Petroleum in flüssigen Medien wurde durchgeführt. 2. Es wurde gefunden, da\ die Flüssigkeits dispersion in flüssigen Medien durch Düsenspritzung ziemlich anders verlÄuft als Vernebelung im Gasmedium. 3. Bei der Flüssigkeitsdispersion durch Düsenspritzung in flüssigen Medien findet die hydrodynamische Kavitation statt, die vielleicht zur Dispersion au\er der Reibung zwischen ausgespritzter Flüssigkeit und Mediumflüssigkeiten eine Rolle spielt. 4. Es wurde gefunden, da\ der Spritzdruck (¯P ₀) und die Mittelgeschwindigkeit (¯v_D ²) einander proportional sind.Die Kosten dieser Untersuchung sind zum Teil von der pharmazeutischen Fabrik Shionogi Co., A.G., unterstützt worden, wofür wir dem PrÄsident HerrnKÔtaro Shiono, sowie dem Direktor des Forschungsinstitutes, Herrn Dr.Ken-ichi Takeda zum verbindlichsten Dank verpflichtet sind.     

Über Koaleszenzerscheinungen grober Tropfensysteme

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