摘要:
In a process of preparing sinter magnesia from magnesium oxide in a sintering kiln evolving flue gases during sintering, the flue gases are washed before their removal from the kiln to the atmosphere with a portion of the magnesium chloride slurry formed during the preparation of the magnesium oxide and the magnesium chloride slurry used for washing the flue gases is recycled to the slurry wherefrom the magnesium sol for making the magnesium oxide is derived.
摘要:
Compounds of the formula ##STR1## in which R.sup.1 denotes hydrogen or a saturated or singly or multiply unsaturated alkyl radical having up to 50 carbon atoms,X represents --CH.sub.2 --, --O-- or --NH--,R.sup.2 denotes hydrogen or a saturated or singly or multiply unsaturated alkyl radical having up to 50 carbon atoms,R.sup.3, R.sup.4 and R.sup.5, independently of one another, denotes hydrogen or acyl--CO--R.sup.6, R.sup.6 being an alkyl radical having up to 10 carbon atoms,R.sup.7 denotes hydrogen, C.sub.1 -C.sub.7 -alkyl-, hydroxymethyl, 1-hydroxyethyl, mercaptomethyl, 2-(methylthio)-ethyl, 3-aminopropyl, 3-ureidopropyl, 3-guanidyl-propyl, 4-aminobutyl, carboxymethyl, carbamylmethyl, 2-carboxyethyl, 2-carbamoylethyl, benzyl, 4-hydroxybenzyl, 3-indolylmethyl or 4-imidazolylmethyl, andR.sup.8 represents hydrogen or methyl, andR.sup.9 represents hydrogen, acetyl, benzoyl, trichloroacetyl, trifluoroacetyl, methoxycarbonyl, t-butyloxycarbonyl or benzyloxycarbonyl andR.sup.7 and R.sup.8 together can denote --CH.sub.2 --CH.sub.2 --CH.sub.2, and pharmaceutically acceptable salts thereof stimulate the immune system and can be used in conjuction with antibiotics and vaccines. New intermediates are also shown.
摘要:
Compounds of the formula ##STR1## in which X is hydrogen or the radical --CH.sub.2 OR.sup.5,three of R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each independently is hydrogen or ##STR2## and the fourth is ##STR3## Z each independently is oxygen, sulphur, NH or CH.sub.2, and R.sup.1, R.sup.6 and R.sup.7 each independently is an optionally substituted hydrocarbon radical having up to 50 carbon atoms,stimulate the immune system's response and antibody production.
摘要:
A steering column assembly for arranging in the area of a steering column in a motor vehicle, comprises a locating device, a centrally arranged support board, and at least one steering column switch. The locating device comprises a receptacle for the support board and at least one laterally-aligned receptacle for the steering column switch. The support board establishes electrical connection between the connections of the steering column switch and the vehicle's control devices allocated to the steering column switch. The control devices allocated to the steering column switch are at least in part arranged on the support board. The ease of servicing such a known steering column assembly is decisively improved in that the receptacle for the support board is radially aligned and the support board can be connected to the locating device from a radial direction.
摘要:
A horizontal multiple-strand continuous casting plant and a method of operating the plant. The casting plant includes a distributor with several molds and a corresponding strand drawing unit which conveys the individual strands out of the molds by means of pulling movements and return pushing movements, wherein the strands can be individually clamped within the strand drawing unit. The strand drawing unit includes two clamping devices which alternatingly carry out the pulling movements and the return pushing movements. In the event of an interruption in one of the molds, the method includes connecting in a frictionally engaging manner the strand located in the affected mold to one of the two clamping devices of the strand drawing unit by actuating the corresponding clamping device only during at least one return pushing movement, and disconnecting from this strand the second clamping unit during the pulling movement thereof. The distributor of the casting plant has discharge openings arranged in a side wall of the distributor. The number of discharge openings corresponds to the number of strands being produced. A mold is provided for each of the discharge openings. The molds are combined into a mold block and are arranged in recesses of a housing of the mold block. The axes of the recesses of the housing are in alignment with the axes of the discharge openings of the distributor. Each strand drawing unit has a lower clamping plate in common for all strands and an upper clamping plate for each of the strands, wherein each clamping plate is controllable by a clamping cylinder and is fastened to this clamping cylinder. The lower and upper clamping plates including the clamping cylinders are mounted in a drawing frame. A drive means is mounted on the drawing frame for moving the drawing frame in axial direction of the strand. The upper clamping plates or the clamping cylinders are arranged on the drawing frame in such a way that the axes of the clamping cylinders intersect the axes of the discharge openings.
摘要:
A continuous casting plant for the horizontal casting of steel in several strands includes a casting ladle with two discharge openings provided in the bottom of the casting ladle. Each discharge opening is provided with a closure device. Each discharge opening has at least one tundish channel provided with at least one outlet opening. A mold fixedly attachable to the tundish channel is arranged in axial alignment with each outlet opening. Each tundish channel is mounted with the corresponding mold or molds on a tundish car. The tundish cars are movable underneath the casting ladle horizontally and transversely of the casting direction on a track formed by rails between a preparation position and a casting position. Between the preparation position and the casting position, the rails have rail sections which are displaceable from the rail travel direction. The length of the rail sections is such that the rail sections can receive one of the tundish cars.
摘要:
A method of combating rheumatic diseases which comprises administering to a patient afflicted therewith an amount effective to combat such disease of a compound of the formula ##STR1## in which Z is a glycosyl radical bonded via the anomeric carbon atom,R.sub.1 is hydrogen or an optionally substituted hydrocarbon radical with up to 30 C atoms, which hydrocarbon radical is optionally interrupted by O, N or S, andR.sub.2 is hydrogen or an alkyl or aralkyl radical with up to 30 C atoms, which is optionally interrupted by O, N or S or substituted by an oxygen-containing group or halogen,with the proviso that COR.sub.1 is not an acyl group with 1-5 C atoms if R.sub.2 is alkyl with 10-20 C atoms.
摘要:
The invention includes, as novel compounds, aminoglycoside antibiotics of the 4,6-di-O-(aminoglycosyl)-1,3-diaminocyclitols which are 3-N"-substituted. Also included in the invention are compositions containing said novel compounds and methods for the use of said compounds and compositions.
摘要:
A method for multicolor printing of stock in web or plate form and having a smooth, nonabsorbent surface, includes printing on the stock by the indirect flexographic printing process; assigning each color to be printed to a respective printing unit which includes an inking unit, a cylinder for a flexographic printing form, a transfer cylinder and a counterpressure cylinder; always drying the ink on the stock before passing the stock to the next printing unit; and removing ink located in indentations and on sides, respectively, of the printing surfaces of the flexographic printing form; and a printing press for printing in accordance with the method.
摘要:
The apparatus includes a pouring ladle with a sealable bottom opening and a distributing channel arranged beneath the ladle for the purpose of storing molten metal. The distributing channel is provided with at least two bottom openings that are openable and closable in a controlled manner. A separate tub-shaped basin is arranged beneath each bottom opening of the distributing channel and at least one mold is detachably connected to a bottom portion of each of the tub-shaped basins.