NMR experiments are reported for the copper chalcogenide spinel CuV : S 4 , which has incommensurate lattice distortions at low temperatures in spite of the cubic symmetry at high temperature. A broad spin-echo spectrum of 51 V has been observed below 90 K at 17 MHz. but it shows a remarkable frequency dependence where it becomes sharper with decreasing frequency. Possible coexistence of charge and spin density waves is suggested at low temperatures in this material.
Ein neues Verfahren zur Entschwefelung von Öl (Tokoshi‐MDS‐Verfahren), das einen MoO3‐CoO‐Al2O3‐Katalysator verwendet und bei Temperaturen von 370‐400°C und unter einem Druck von 100‐200 atm durchgeführt wird, wird in einer Versuchsanlage erprobt.
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