Zur Kenntnis der Triterpene. 159. Mitteilung. Über Abbaureaktionen an der Carboxyl-Gruppe der Elemadienolsäure
作者:R. T. Arnold、E. Koller、O. Jeger
DOI:10.1002/hlca.19510340219
日期:——
Die Carboxyl-Gruppe der zweifach ungesättigten, tetracyclischen Oxy-triterpensäure Elemadienolsäure ist sehr wahrscheinlich sekundär gebunden und liegt in der Gruppierung —CH2CHCOOH vor.
作者:V. Ya. Degoda、B. R. Kiyak、V. S. Manzhara、V. E. Rodionov、A. I. Proskura
DOI:10.1007/bf02758061
日期:2000.5
The photoluminescence (PL), roentgenoluminescence (RL), and optical absorption of ZnSe were measured near the fundamental edge in the temperature range from 80 to 400 K. Because of the much smaller absorption coefficient for x-rays as compared to visible light, the contribution to RL from emitting centers located deeper in the sample is higher. The quality of ZnSe can be assessed by correlating its near-edge PL and RL spectra. The temperature dependences of the peak positions of the blue PL and RL bands indicate that these emissions are due to the same center. The blue RL band is redshifted by 18 meV in comparison with Pt,, and its intensity is lower than that of the longer wavelength bands. The different positions of the PL and RL bands are interpreted in terms of thermal spike formation under x-ray excitation and reabsorption of the emitted light.
Über die Elemisäure aus Manila-Elemiharz
作者:Hans Lieb、Miloš Mladenović
DOI:10.1007/bf01518489
日期:1933.2
Weitere Untersuchungen über die α-Elemol- und Elemonsäure
作者:Hans Lieb、MiloŠ Mladenović
DOI:10.1007/bf01552778
日期:1932.12
Polyterpene und Polyterpenoide LXIX. Zur Kenntnis der Harzsäuren des Manila-Elemi
作者:L. Ruzieka、E. Eichenberger、M. Furter、M. W. Goldberg、R. L. Wakeman