Abstract: Novel 2-(aminoalky)-6,7-dihydroindolo[1,7-ab] 1,7-ab][1]benzazepines and acid-addition salts thereof having antibacterial activity, and intermediate and process for the preparation thereof are disclosed.

Abstract: Novel 9-aroyl-1,2,3,4-tetrahydrocarbazoles bearing a carboxy substituent at position 3 or 4 and corresponding esters having antiinflammatory activity, the preparation thereof and novel intermediates therefor are described.

Abstract: Novel 3-Z-9-benzoyl-1,2,3,4-tetrahydrocarbazoles, wherein Z is CONR.sub.5 R.sub.6, CONHOH, CN, or COCH.sub.2 X, where X is chloro or bromo, having antimicrobial and/or anti-inflammatory activity are disclosed. Compounds wherein Z is CONR.sub.5 R.sub.6 and CONHOH are prepared from the corresponding 3-carboxylic acids by conversion to the corresponding acid chlorides and subsequent reaction with the appropriate amines and hydroxylamine respectively; compounds where Z is CN are prepared by the dehydration of the corresponding compounds where Z is CONH.sub.2 ; and the compounds where Z is COCH.sub.2 X are prepared by reacting hydrogen chloride or bromide with the corresponding compounds where Z is COCHN.sub.2 which in turn is prepared from the corresponding 3-carboxylic acid chloride by reaction with diazomethane.

Abstract: Novel 4-R.sub.1 R.sub.2 NCH.sub.2 -9-benzyl-6-R.sub.3 -7-R.sub.4 -1,2,3,4-tetrahydrocarbazoles having antibacterial activity are disclosed. The compounds are prepared by the chemical reduction of the corresponding 4-R.sub.1 R.sub.2 NCO-9-benzyl-6-R.sub.3 -7-R.sub.4 -1,2,3,4-tetrahydrocarbazoles.

Abstract: A feed mixture of liquid and solids is delivered into a central nave at the lower portion of a basket mounted for rotation about a vertical axis. The nave is rigidly connected to the outer portion of the basket by spoke-like tubes in which the feed mixture is accelerated while flowing from the nave into a channel extending around the rotation axis and opening upwardly into the separating chamber in the basket's outer portion. To further reduce turbulence, the channel is closed at the top in the regions where the spoke-like tubes communicate with the channel. A discharge shoe in the basket is movable relative thereto to plow accumulated solids from the outer part of the separating chamber, so that the plowed solids fall through bottom openings of the basket between the spoke-like tubes.