Abstract: A patch test material for the detection of metal allergies which contains a dental metal, noble or base, with which an allergic reaction aid such as a biological high molecular weight compound, e.g., a protein is present.

Abstract: The present invention provides a new biocatalytic reactor to utilize succfully insoluble biocatalysts to carry out enzymatic reactions. It is especially adequate for the processing of enzymatic reactions using gel-like structure insoluble biocatalysts by eliminating the problems of high pressure drops, microbial contamination and mechanical disintegration which arise when conventional packed columns or agitated tanks are used.It is also adequate to utilize rigid insoluble biocatalysts to process enzymatic reactions with viscous or particulate substrates.

Abstract: A device for monitoring the release of a substance from a substrate, e.g., the release of ions through membranes, are disclosed.

Abstract: A high flow sodium chlorate oxygen generator assembly (10) of a relatively small diameter. The generator assembly includes a chlorate candle (12) mounted within a containment vessel (14, 16, 18), the chlorate candle being provided with a deep conical recess (54) which is thinly coated with a rapidly combustible material (56). Ignition of the rapidly combustible material is achieved by extending a hollow ceramic tube (58) from a primer (38) located at one end of the containment vessel, the hollow tube directing the flame from the primer, when ignited, towards the center of the deepest part of the conical depression. The above construction provides a high surface area for burning, and also intensifies the heat flux within the chlorate candle thereby substantially increasing the rate of oxygen output over known chlorate candles of comparable diameters.

Abstract: A modular tissue superfusion chamber includes a receptacle support having a recess therein for receiving one of a plurality of modular bath containers which hold tissue samples being tested for electrophysiological responses to compounds. The receptacle support has a Peltier heater therein and is mounted on a magnetic base with a plurality of pillars.

Abstract: A blood test strip includes a support member having an upper surface and lower surface. A separating member is disposed on the upper surface of the support member, and includes an upstream end and a downstream end. A recipient member is disposed on the upper surface of the support member in a side by side relation to the separating member. The recipient member includes an upstream end disposed in an adjacent, non-interwoven relation to the downstream end of the separating member to define an incision therebetween.

Abstract: Organic acids are prepared by fermentation and then separated from the fermentation broth by means of an electrodialysis.The present process does not require an addition of an alkali. The organic acids are recovered as free acids with high purity and at high yields.

Abstract: System and method for converting and recycling liquid borne organic waste materials from a processing plant. The waste material is passed through a compost bed containing a fecal material which treats the organic waste biologically, removes liquid from the waste by adsorption and absorption, and filters out colloidal particles. Any waste material which remains after passing through the compost bed is passed through a charcoal filter bed, then recycled through the compost and charcoal. Warm air is passed through the charcoal and the compost to provide aeration for the composting process and removes the adsorbed and absorbed water from these beds. The air is then passed through another charcoal filter bed, following which it is condensed. The condensate is discharged from the system.

Abstract: A method and device for mineralization of carbonaceous materials, for determining trace concentration of chemical elements in foods, fodder, plant, and animal tissues and other materials. The method can also be used for determining the structure of the mineral skeleton of carbonaceous materials or for preparing ash of carbonaceous materials for various technological uses. The method includes heating a specimen to a temperature ranging from 300.degree. to 400.degree. C. for 6 to 20 hours at atmospheric pressure in a stream of oxygen, at a rate of 0.03 to 0.15 ml.s.sup.-1.g.sup.-1 of the specimen. A gas with a higher oxydative strength than that of oxygen is added to the stream of oxygen, said gas being selected from the group consisting of ozone, nitrogen oxides, chlorine and mixtures thereof such as an ozone-nitrogen oxides mixture, chloroxides of nitrogen, in an amount of 1 to 6 volume percent.

Abstract: A mixing apparatus having a mixing chamber which has inlet ports of resin components to be mixed and an outlet port of a mixture thus obtained, comprising a flow varying member which moves across the mixing chamber to selectively occupy a retracted position in which it is retracted from the mixing chamber and a forward position in which the flow varying member interrupts the flow of the resin components to change the directions thereof, an immovable key member which defines a restriction passage together with the flow varying member which occupies the forward position, and a chamber block which is opposed to the flow varying member to laterally move in order to selectively occupy a forward position in which it defines a part of the mixing chamber and a retracted position in which the chamber block defines a flow varying chamber together with the key member and the flow varying member which occupies the forward position.

Abstract: The present invention entails a process for treating wastewater utilizing a return activated sludge process. Primary sludge is separated from the wastewater stream and conveyed into a fermentation tank and held a sufficient time to permit hydrolysis of suspended solids so as to produce soluble substrates. The soluble substrates are mixed with the return activated sludge and held for a selected time period to form conditioned return activated sludge. Thereafter, the conditioned return activated sludge is mixed in an initial aerobic treatment zone with pretreated wastewater. Thereafter, the mixed conditioned return activated sludge and pretreated wastewater is conveyed through a series of treatment zones, which may include at least one anoxic treatment zone, where phosphorus and other pollutants are removed from the wastewater.

Abstract: A method of preparing an integral multilayer analytical element such as for analysis of calcium comprising a water-impermeable light-transmissive support, a reagent layer containing a water-soluble indicator capable of reacting with an analyte to produce an optically detectable change, and a porous spreading layer containing a spreading action controller and/or an acid capable of decomposing the calcium compounds in a sample, superposed in this order, wherein the spreading action controller and/or the acid is dissolved in an organic solvent which does not dissolve the above water-soluble indicator, this solution is incorporated into the porous spreading layer, and this superposed material is dried. In the method of the present invention, the migration of the water-soluble indicator in the reagent layer at the time of incorporating the spreading action controller or the acid into the spreading layer is inhibited by using a particular organic solvent.

Abstract: Effluent process gases, particularly those employed in the production and processing of solid state electronic components, are cracked to form products having a condensed phase, which may be separated from the flowing process gas. A plasma trap comprises a high frequency coil for producing a plasma therein. The walls of the trap may be cooled and the trap may employ a removable wall on which the cracked product collects. Particular gases that may be treated are arsine, phosphine, disilane, silane, germane, organometallics and gases containing beryllium and boron.

Abstract: In the device for evaluating test strips having individual test sections, which consist of a terminal, a work platform with holder for the test strips and a sensing head, a position mark 5 is arranged for each test section 9 on the side of the holder 13. On the work platform 15, the sensing head 14 is arranged so as to be capable of of traversing the test sections 9 and the position marks 5. The sensing head 14 is provided with light sources 6, which are directed towards the test sections 9, of different wavelength and with a light receiver and with at least one position detector 10 which is directed towards the position marks.

Abstract: Apparatus for regenerating zeolite-type catalyst used in fixed bed hydrocarbon conversion processes, such as the conversion of olefins to gasoline and diesel fuel. Regeneration is achieved using a portion of a flue gas stream to regenerate catalyst and preheat feedstock. Economies in equipment and operation are realized by employing a once-through configuration for the regenerator gas stream.

Abstract: An apparatus for detecting oil and other lighter-than-water contaminants in an effluent stream in a sewage system. The apparatus includes a disposable detector which floats in the effluent stream and detects oil and other contaminants having a specific gravity lighter than the water by absorbing the oil and such contaminants in an oleophilic material, permitting the oil and other contaminants to rise and collect in a collection tube. The acidity or pH of the effluent being monitored is determined by routing a portion of the effluent stream through the lower side of the detector across a litmus paper. The detector is held in the sewage system by a securing system which indicates whether the detector has been tampered with since it was installed.

Abstract: In order to obtain a higher measuring accuracy and better selectivity in the optical quantitative analysis of sulphur dioxide in gaseous or liquid media, it is proposed that the medium to be analyzed be brought into contact with a fluorescent indicator which emits fluorescent light upon excitation and which is from the group of triphenylmethane dyes, and that the extent to which fluorescence is quenched by the SO.sub.2 quencher be used as a measurable variable for quantitative determination of the content of sulphur dioxide in the medium.

Abstract: A multistage process for reducing NO.sub.x in flue gas from fluid catalytic cracking catalyst regeneration. flue gas is preferably removed after each stage. A portion of NO.sub.x formed in an upstream portion of first and second regeneration stages is converted to N.sub.2, prior to discharge from the first and second stages, respectively, by operating downstream ends of the respective first and second stages at oxygen-lean conditions. The present invention also may provide staged regeneration, to reduce NO.sub.x in flue gas, by passing spent catalyst through a transport reactor in plug type flow and sequentially contacting the catalyst with a plurality of oxygen-containing streams.

Abstract: A sensor for determining the partial pressure of carbon dioxide in a liquid, which comprises a carbon dioxide - permeable, liquid and ion-impermeable membrane enveloping an aqueous medium containing an absorber, a fluorescer and a source of bicarbonate ions, which medium exhibits variations in pH as a function of the partial pressure of dissolved carbon dioxide, the ratio of absorber to fluorescer and the characteristics of the absorption spectrum of the absorber and the excitation and emission spectra of the fluorescer being such that the partial pressure of carbon dioxide in the liquid may be determined from the pH of the aqueous medium as measured by the intensity of the fluorescent emission of the fluorescer.

Abstract: Organic acids are prepared from their salts electrodialytically. At the same time, another acid is converted electrodialytically into the corresponding salt. Both electrodialytic conversions take place in the same electrodialysis unit. If the salt of the organic acid has been fermentatively prepared as, for example, malate from fumarate, it is possible both to prepare malic acid by electrodialysis and also to prepare fumarate from fumaric acid for the fermentation. Through coupling substrate and product streams in the electrodialysis, a closed circuit is formed.