F r a n z D a l l a c k e r * , G e r m a n u s R e i c h r a t h u n d G e r a r d S c h n a c k e r s Institut für Organische Chemie der Technischen Hochschule Aachen, Prof.-Pirlet-Straße 1, D-5100 Aachen Z. Naturforsch. 34b, 624-632 (1979); eingegangen am 13. November 1978 5,6-Dimethyl-l,3-benzodioxole-4,7-quinone, 6,7-Dimethyl-l,4-benzodioxan-5,8-quinone, 7,8 -Dimethyl 3,4 -dihy dro 2 H -1,...

hydrogen was produced by steam reforming of dimethyl ether (dme) using a physical mixture of commercial hzsm-5 zeolite (for dme hydrolyzing) and cu/zno/al2o3 (for methanol steam reforming) as a catalyst in a fixed bed reactor. the experiments were performed at atmospheric pressure and in a temperature range from 270 to 310 °c. the effects of feed temperature and gas hourly space velocity (ghsv)...

Through the main chemical reaction of metal ions and S2−, a new type sulfide precipitant was first prepared used to realize selective separation recovery copper arsenic from leaching solution soot. It is proven by experimental results that could efficient arsenic. Indeed, slag with Cu grade about 47% trisulfide As operation 98% be obtained. The energy calculation analysis SEM images illustrate ...

Echinacoside (ECH) is one of the major active phenylethanoid glycosides (PEGs) in famous traditional Chinese medicine, Herba Cistanches. Although it has various bioactivities, such as antioxidation, neuroprotection, and hepatoprotection, knowledge about its metabolic fate is scant. In the present study, eight phase II metabolites, 3,4 -O-dimethyl-ECH-3 -O-beta-d-glucuronide (M1); 4,4 -O-dimethy...