Abstract: Elemental sulfur is recovered from ammonium salts of sulfuric oxyacids (e.g. ammonium sulfate, ammonium hydrogen sulfite, and ammonium sulfite) by passing the salt (e.g. in aqueous solution) and a hydrogenous reducing agent (e.g. sewer gas or coal gas) through a reaction chamber maintained at 800.degree. to 1300.degree. C. so as to yield a product gas containing molecular nitrogen, steam, and vaporous sulfur, and then cooling the product gas to 125.degree. to 325.degree. C. so as to condense at least a portion of the sulfur, which is then recovered.

Abstract: A hand guided, motor driven, utility tractor having a single drive wheel which is rotatably mounted on a frame approximately 1/2 to 2/3 of the length of the frame away from its front end and which is driven by an engine mounted on the frame forward of the drive wheel. A beam is adjustably mounted on the frame to the rear of the drive wheel for attaching plows, discs or a variety of other devices for planting, tilling, smoothing or otherwise modifying land in the path of the drive wheel. A stabilizer wheel, preferably with a cutter portion adapted to penetrate the soil, is adjustably mounted on the frame forward of the drive wheel and disposed forward and below the engine. A hand control lever is mounted on a handle structure extending upwardly and rearwardly from the frame and simultaneously raises, or lowers, the tool attachment beam and the stabilizer wheel.

Abstract: Apparatus comprising a combustion engine having a combustion zone for burning acetylene with an oxygen-containing gas to produce mechanical power and exhaust gases including H.sub.2 O and oxides of carbon, fuel input means, exhaust output means and power output means; a first structure defining a reaction zone containing a compound selected from the group consisting of sodium peroxide, potassium peroxide, lithium peroxide, sodium superoxide, potassium superoxide and lithium superoxide for reacting H.sub.2 O with the compound to produce oxygen and for reacting oxides of carbon with by-products of the reaction of the H.sub.2 O with the compound; a first conduit connecting the exhaust output means to the first structure for supplying exhaust gases, including H.sub.2 O and oxides of carbon, thereto; a second conduit connecting the first structure to the fuel input means for supplying oxygen thereto; a second structure defining a reaction zone containing calcium carbide for reacting H.sub.

Abstract: Semi-permeable membranes are made from polyamides, especially N-alkoxyalkyl polyamides, and water-soluble polyvinyl alcohols. The membranes are preferably formed as fibers. The membranes can be made from compositions containing the polymer components and a di(lower alkyl) sulfoxide, e.g. dimethyl sulfoxide. The membranes may contain complex-forming metal components. The membranes are useful for separating chemicals from their mixtures by techniques using an aqueous liquid barrier and complex-forming metals, e.g. for the separation of aliphatically-unsaturated hydrocarbons such as ethylene from close-boiling hydrocarbons.

Abstract: A valve assembly comprising a housing constructed of a material which will expand when heated, a plurality of closure elements inside the housing that can be rotated between valve open and valve closed positions, each element being mounted on its own shaft that is journaled in the housing and that has an external end portion extending through the housing with the shafts being parallel to one another and lying in the same plane at equidistant intervals, a plurality of cranks of equal length extending radially from the end portion of each shaft for rotating the shaft, and drive arm means linking the plurality of cranks so that rotation of one of the cranks causes all of the cranks, shafts, and elements to rotate in unison is improved by the drive arm means being temperature-compensating three-link mechanisms connecting each of the cranks and comprising (a) a first floating link pivotally attached at its first end to the non-shaft end of one of the cranks, (b) a second floating link of the same length as the fir

Abstract: Metal, e.g. sodium sulfate, is separated from metal, e.g. sodium sulfite, in a solution, for instance a solution used in a system involving contact of sulfur dioxide-containing gases with the sodium sulfite solution as an absorbing solution to recover sulfur dioxide wherein the absorbing solution is regenerated after contact with the gas and recycled for further use. A portion of the absorbing solution is purged to avoid the unduly large build-up of sodium sulfate in it. The purge stream is contacted with sulfur dioxide to reduce the amount of sodium sulfite therein to relatively soluble sodium bisulfite, and the relatively insoluble sodium sulfate is recovered therefrom as undissolved solids. The liquid separated from the sodium sulfate, which is rich in sodium bisulfite, is returned to the absorbing solution. In a preferred aspect, the purge stream is withdrawn from the absorbing solution subsequent to contact with the sulfur dioxide-containing gases and before regeneration.

Abstract: A business machine for communicating with remote and/or local data devices. A multiplexer selects the device to communicate with the business machine and sequences the operation of the machine through its several steps under control of a central processing unit. Those data devices with which the business machine communicates on a party line are coupled to the multiplexer through a communications controller which detects Attention signal, requests access to the memory, and in response to acknowledgement of access, transfers characters between the data device and the memory. The controller receives a block check character but generates a modified block check character which simplifies the utilization of that check. A video display can be provided with the business machine.

Abstract: This invention relates to 2-amino-4-[2-(1-lower alkyl-5-nitro-2-imidazolyl)vinyl]-pyrimidines and their use in the treatment of protozoal diseases and bacterial infections.

Abstract: A ski binding permitting rapid and easy attachment of skis to ski boots while also permitting sure, reliable disengagement of the skis from the ski boots upon application of a pre-set amount of twisting force, thereby minimizing the risk of injury to the skier in the event the skier falls. A first assembly is attached to each ski and includes a housing having a cam positioned therein and rotatable between a hook-retaining position and a hook-releasing position, a first bias device for inhibiting rotation of the cam from the hook-retaining position to the hook releasing position, and a second bias device for retaining a hook within the cam. A second assembly is provided to attach to the skier's boots, and the first and second assemblies are releasably coupled together by a hook. In one embodiment, the second assembly includes a housing attached to the ski boot and having a slot for receipt of the hook, a movable pin to retain the hook in the housing, and a lever for controlling movement of the pin.

Abstract: A method for inhibiting pregnancy in female mammals which comprises administering an effective amount of a compound having the formulae: ##SPC1##The compound is administered for at least one full estrus cycle to insure prevention of pregnancy and thereafter as long as it is desired.

Abstract: A process, and the composition used therein, for estrogenic therapy which comprises administering daily to the patient from about 0.2 to 2000 milligrams of a compound having the formula: ##EQU1## wherein R is selected from the group consisting of hydrogen, lower alkyl and a lower saturated acyclic acyl; Z is selected from the group consisting of >CH.sub.2, >CHOH and >C=O; and A is selected from the group consisting of --CH.sub.2 --CH.sub.2 -- and --CH=CH--.

Abstract: In a process for preparing methacrolein by oxidation of isobutane, unreacted isobutane is absorbed from a gaseous mixture by absorption in a liquid absorbent and recovered by stripping the absorbent with nitrogen or a mixture of nitrogen and oxygen. The recovered isobutane in admixture with the stripping gas is then recycled to the oxidation reaction.

Abstract: The high-melting diastereoisomer of zearalanol or derivative thereof is prepared by heating its corresponding low-melting diastereoisomer under dehydrogenating conditions in the presence of a Raney nickel catalyst and under an oxygen-free atmosphere, and then subjecting the solution to reducing conditions under a hydrogen atmosphere at elevated pressure.

Abstract: Compounds of the formula: ##SPC1##Wherein --A-- is either --CH.sub.2 --CH.sub.2 -- or --CH=CH--, >Z is either >CH.sub.2, >C=O or >CH--OH, Y is --H or --OR' wherein R' can be hydrogen, alkyl, alkanoyl, aryl, or aryl alkyl, and Gly is a glycosyl group, which exhibit anabolic and estrogenic activity, are provided, as well as processes for their preparation and compositions containing them which are useful as ruminant growth promoters.

Abstract: A method of lowering blood cholesterol using 3,4,5-trimethoxybenzoyl-5-amino caproate sodium and related compounds is disclosed.

Abstract: This invention provides a new synthesis for zearalanone and for related compounds having more or fewer carbon atoms in the non-aromatic ring than does zearalanone, which related compounds and zearalanone are represented by the formula ##SPC1##Wherein X is an integer having a value from 2 to 6 inclusive and Y is an integer having a value from 2 to 8 inclusive. It also provides for new methods of making compounds useful in the synthesis of zearalanone and related compounds.The new compounds useful as intermediates are 2,7-octadienoic acid; methyl 2,7-octadienoate; sodium ethyl 6-(4-pentenyl)-.beta.-dihydroresorcylate; ethyl 6-(4-pentenyl)-.beta.-dihydroresorcylate; sodium methyl 6-(4-pentenyl)-.beta.-dihydroresorcylate; methyl 6-(4-pentenyl)-.beta.-dihydroresorcylate; methyl 3-bromo-6-(4-pentenyl)-.beta.-dihydroresorcylate; methyl 6-(4-pentenyl)-.beta.-resorcylate; ethyl 6-(4-pentenyl)-.beta.-resorcylate; ethyl 6-(4-pentenyl)-.beta.-resorcylate dibenzyl ether; and 4-penten-2-yl 6-(4-pentenyl)-.beta.

Abstract: A business machine for communicating with remote and/or local data devices. A multiplexer selects the device to communicate with the business machine and sequences the operation of the machine through its several steps under control of a central processing unit. Those data devices with which the business machine communicates on a party line are coupled to the multiplexer through a communications controller which detects Attention signals, requests access to the memory, and in response to acknowledgement of access, transfers characters between the data device and the memory. The controller receives a block check character but generates a modified block check character which simplifies the utilization of that check. A video display can be provided with the business machine.

Abstract: Zearalene type compounds are prepared by treating zearalenone type compounds in a solvent selected from the group consisting of acetic anhydride, propionic anhydride, dioxane, ethyl acetate, ethyl ether, and tetrahydrofurane, under reducing conditions in the presence of reducing amounts of zinc and hydrogen halide.

Abstract: Thick film resistive elements are prepared from an intimate admixture comprising silica, lead oxide and ruthenium dioxide or iridium dioxide which is heated to a temperature sufficient to provide a lead-containing glass having dispersed therein lead ruthenate or lead iridate. The lead-containing glass is comminuted and a resistor paste is formed which can be subsequently coated and fired on to a desired substrate to form the thick film resistive component. The method of this invention may facilitate the production of thick film resistors exhibiting a low temperature coefficient of resistivity, relative freedom from noise and drift, and high moisture resistance.

Abstract: Novel separation film membranes are made with cross-linked hydrophilic polyvinyl alcohol and nylon, and the films contain complex-forming metal components which are active in the presence of water. The polyvinyl alcohol is cross-linked by reaction with a polycarboxylic acid. The invention includes the membranes, their method of manufacture, and the method of using them to separate one or more components of a gaseous mixture.