Das Verhalten von Propoxy- und Butoxygruppen bei der Zeisel-Reaktion

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Preparation and TG—DTA analysis of manganese silicon nitride

Manganese silicon nitride was prepared quantitatively as a precipitated phase by treating a Mn; Si-alloy (Mn: 1.84 w/o, Si: 1.12 w/o) in a mixture of 2% NH₃ and H₂ at 700°C. Nitriding was carried out in situ in a thermobalance and the nitrogen uptake was recorded as a function of time. The nitride phase was isolated and investigated by means of the combined TG-DTG-DTA technique both in an atmosphere of nitrogen at 25–1600°C and in a mixture of Ar+O₂ (p_O2 = 0.20 atm) at 25–1000°C. In the nitrogen atmosphere MnSiN₂ appears to be stable up to 1000°C. Oxidising the nitride in the Ar/O₂ mixture caused three distinct exothermic processes to occur at characteristic temperatures. The final oxidation products as identified by diffractometry and IR-spectroscopy are manganese oxide silicate (braunite) and silicon dioxide.     

Thermoanalytical study of water-based aluminium rolling fluids combined with direct observation

During cold-rolling of aluminium sheets the auxiliary lubricant fluids used decompose giving rise to discolouring of the sheet surface. In the present study a combined TGA-DTG-DTA analysis has been used in combination with direct observation of the colour change of carboxylate-based fluids in oxidizing and inert atmosphere to determine the temperature region of decomposition and/or polymerization. Significant effects have been observed depending not only on the type of atmosphere but also on the type of the cationic part of the organic component in these fluids.     

Die Untersuchung der Spektren einiger aliphatischer und aromatischer Isocyanate im nahen IR

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Eine Schnellmethode zur Bestimmung der Wasserstoffverteilung Har/Hal in gemischt aromatisch-aliphatischen Kohlenwasserstoffen

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IR-Analyse

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Die Differentialthermoanalyse von linearem Poly?thylen und Hochdruckpoly?thylen-Mischungen

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Schnelles und praktikables Verfahren zur Elimination der labilen Form bei der Messung des glykosylierten H?moglobins (Hb A1)

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Rapid and convenient method for the elimination of labile glycosylated hemoglobin (Hb A₁)