Die Torsionsuntergruppe einer Abelschen Gruppe

Ohne Zusammenfassung Friedrich Levi, dem alten Freunde, dem Berg- und Forschungskameraden, zum 70. Geburtstag am 6. Februar 1958     

Nichtlineare Störung der isolierten Eigenwerte selbstadjungierter Operatoren

Ohne ZusammenfassungIch erlaube mir, an dieser Stelle Herrn Prof. Dr. E. Heinz für sein Interesse und viele wertvolle Hinweise zu danken.     

Die Automorphismengruppe des Körpers aller algebraischen Funktionen in einer Veränderlichen über einem algebraisch abgeschlossenen Körper

Ohne ZusammenfassungRuth Moufang zum 10. Januar 1970 in dankbarer Erinnerung an viele Jahre freundschaftlicher Zusammenarbeit gewidmetWährend der Niederschrift dieser Arbeit genoß der Verfasser die Gastfreundschaft des Forschungsinstituts für Mathematik an der ETH Zürich, des Mathematischen Forschungsinstituts Oberwolfach und des Department of Mathematics, Pennsylvania State University. Er ist diesen Instituten für die freundschaftlich gewährte Hilfe dankbarst verpflichtet.     

Die Zusammenhangskomponenten der Lösungen analytischer Plateauprobleme

Ohne Zusammenfassung     

On a thermodynamic limitation of the water-gas potentiometry using solid electrolyte cells

Possibilities of the water-gas potentiometry using oxide ion-conducting solid electrolytes may be restricted by side reactions in the gas being analyzed. Changes in electrode potentials caused by simultaneous interfering equilibria in the water gas were investigated over a temperature range 1200 to 400°C for different initial gas compositions. Formation reactions of carbon and methane proved to be the side reactions which can be responsible for potential changes. Limits for the use of the analytical method are shown by graphs with deviations from the ideal values.77th report on oxide ion-conducting solid electrolytes and their possibilities of application; 76. see cfi/Ber. DKG (in press)     

Characterization and quantification of anthocyanins in selected artichoke (Cynara scolymus L.) cultivars by HPLC–DAD–ESI–MS n

The anthocyanin pattern of artichoke heads (Cynara scolymus L.) has been investigated by high-performance liquid chromatography–electrospray ionization mass spectrometry. For this purpose a suitable extraction and liquid chromatographic method was developed. Besides the main anthocyanins—cyanidin 3,5-diglucoside, cyanidin 3-glucoside, cyanidin 3,5-malonyldiglucoside, cyanidin 3-(3′′-malonyl)glucoside, and cyanidin 3-(6′′-malonyl)glucoside—several minor compounds were identified. Among these, two peonidin derivatives and one delphinidin derivative were characterized on the basis of their fragmentation patterns. To the best of our knowledge this is the first report on anthocyanins in artichoke heads consisting of aglycones other than those of cyanidin. Quantification of individual compounds was performed by external calibration. Cyanidin 3-(6′′-malonyl)glucoside was found to be the major anthocyanin in all the samples analyzed. Total anthocyanin content ranged from 8.4 to 1,705.4 mg kg⁻¹ dry mass.      

Biocatalytic deuterium- and hydrogen-transfer using over-expressed ADH-'A': enhanced stereoselectivity and 2H-labeled chiral alcohols

Employing the over-expressed highly organic solvent tolerant alcohol dehydrogenase ADH-'A' from Rhodococcus ruber DSM 44541, versatile building blocks, which were not accessible by the wild type catalyst, were obtained in > 99% e.e.; furthermore, employing d8-2-propanol as deuterium source, stereoselective biocatalytic deuterium transfer was made feasible to furnish enantiopure deuterium labeled sec-alcohols on a preparative scale employing a single enzyme.