198results about How to "Constant concentration" patented technology

The invention relates to an immunoassays, binding assays, solid phase substrates (12) and other devices with an antigen or antibody or ligand or receptor (11) embedded into a solid phase substrate (12). The antigen or antibody is mixed with a molten thermoplastic and formed into the solid phase substrate (12).

An apparatus for the delivery of hypoxic air to a user comprising a biofeedback means where at least one physiologically measurable parameter of the user is substantially constantly measured by a monitoring means and the measured data transmitted to a control means, where the control means comprises: i) means for comparing the measured data of the at least one physiological parameter with a pre-set target value for the parameter; and ii) adjustment means to vary the oxygen concentration in the hypoxic air delivered to the user in response to the transmitted data.

A method for manufacturing a negative electrode for a non-aqueous electrolyte secondary battery is provided. A negative electrode precursor of the non-aqueous electrolyte secondary battery is allowed to absorb lithium ions, the negative electrode precursor includes a current collector and an active material layer formed on the current collector. The precursor is provided with an exposed portion of the current collector. In this method, a negative electrode active material layer is allowed to absorb lithium ions by electrolysis in the non-aqueous electrolyte solution. At this time, by measuring a potential of a portion immersed in the non-aqueous electrolyte solution, the exposed portion is detected and an electric current of the electrolysis is controlled. Thereby, the deposition of lithium metal on the exposed portion is suppressed.

Described herein are methods and compositions for preparing an adsorbent composition for sustained silver ion release is provided. The method comprises impregnating silver nanoparticles on an organic-templated-nanometal oxyhydroxide. Particle size of the silver nanoparticles is less than about 50 nm. The adsorbent composition is antimicrobial in water. In an aspect, the organic- templated-nanometal oxyhydroxide is organic-templated-boehmite nanoarchitecture (OTBN). The resultant adsorbent composition is used as a water filter in a water purification device.

The invention provides a method and a device for coaxial combined machining with tubular electrode discharging and laser irradiation, and belongs to the field of non-traditional machining and combined machining. Micro-etching machining is performed on the surface of an insulating high-hardness brittle material by virtue of a coaxial action of cone-shaped tube electrode discharging and laser irradiation, recessive material defects and stress concentration generated by pulsed laser acting on the surface of a workpiece can attract spark discharge to always act on the current area, and meanwhile, the spark discharge changes the surface shape and physico-chemical property of the current area, then nonlinear absorption of the current area on laser energy is improved, a local field enhancement effect is generated, and pulsed laser focused irradiation can accelerate an electrochemical reaction to promote generation of a stable discharge gas film layer on the surface of a hollow tool electrode; and the interactive cooperation of two types of energy achieves fixed-area micro-etching of the insulating high-hardness brittle material, the machining efficiency is significantly improved, and the machining quality is improved.

A buried grid solar cell is manufactured by a process for metallising one or more metal contacts of a buried grid solar cell having a body of doped semiconductor material, wherein the electrical contact(s) is/are provided by conducting material being arranged in a pattern of one or more grooves into the semiconductor material by an electrolytic metal deposition process comprising a conventional electrolytic bath containing a special combination of per se known additives.

Apparatus and method for testing one or more sterilization indicators (e.g., biological indicators or chemical indicators) or other articles by contacting them under controlled sterilization conditions with a flowing antimicrobial gas containing hydrogen peroxide vapor are disclosed. This invention also provides apparatus and method for testing sterilization processes that use a flowing antimicrobial gas containing hydrogen peroxide vapor under controlled sterilization conditions, or for testing materials for such processes under controlled sterilization conditions, or for testing both such processes and such materials under controlled sterilization conditions. There can be an essentially square-wave contact of the sterilization indicators or other articles with the antimicrobial gas (i.e., short rise time to reach full concentration of the antimicrobial gas in contact with the sterilization indicators or other articles and short fall time to remove all of the antimicrobial gas from contact with the sterilization indicators or other articles). A preferred way of generating a substantially constant flow of antimicrobial gas of substantially constant hydrogen peroxide concentration may be used to generate the antimicrobial gas. A preferred way of determining the hydrogen peroxide concentration in the antimicrobial gas may be used.

The testing equipment for testing antiblocking and hydraulic performance of irrigator of microirrigation system includes supporting frame, supporting pipe, capillary or drip-irrigation tube communicated with supporting pipe, water pipe communicated with supporting pipe and water-sand circulation supply device communicated with water inlet of water pipe. The water-sand circulation supply device includes mixing tank communicated with water pipe, oblique water-collecting channel positioned under the capillary or drip-irrigation tube and the water outlet of the oblique water-collecting channel iscommunicated with mixing tank. Said invention is a comprehensive testing platform capable of testing hydraulic performance of irrigator and its antiblocking performance.

The invention discloses a preparation method of room-temperature ball-milling solid phase chemical reaction of rare earth mixing with nano stannic oxide, relates to a preparation technology of the rare earth mixing with the nano stannic oxide, which can be applied for antistatic coating, plastics, fibre and other fields. Inorganic salts containing stannum and rare earth are taken as reactants, oxalic acid, ammonium carbonate, ammonium bicarbonate, sodium oxalate or sodium carbonate is taken as a ligand, the processing steps are sequentially dosing, mixing and preparing precursors of the room-temperature ball-milling solid phase chemical reaction, and the targeted product can be obtained after impurity removing, drying and thermal decomposition. The preparation method is characterized in that the reaction process does not use water, the stannum ion can be prevented from hydrolysis, uniform mixing can be realized, a solid phase reaction system is broken by utilizing the shearing force and the impact force generated during the ball milling process, the specific surface area of the reactant is increased, the reaction rate is increased, micro-fine and uniform precursors can be prepared, then the processes of cleaning, drying and controlling the thermolysis temperature and time are carried out, and thereby the rare earth mixing with nano stannic oxide powder, the particle size distribution of which is 30 to 80nm and has controllable morphology, can be obtained.

When a separation membrane (3) is washed with a chemical solution that is a sodium hypochlorite solution, which has a high concentration, diluted with membrane treated water stored in a chemical solution tank (6), an ammonic nitrogen concentration in membrane-treated water is monitored with a monitoring device (9), and a control device (8) controls a chemical solution dosing pump (7) using the concentration measured by the device (9) to adjust a dilution rate. Thereby, even when water quality of membrane-treated water varies, a sodium hypochlorite concentration in backwashing water can be retained constant, and fluctuation in the chemical washing effect can be prevented.

A multiwipe package having enhanced wipe storage stability is disclosed. The wipe package contains a stack of wipes in a barrier packaging film, wherein the headspace in the package between the stack of wipes and the packaging film is minimized.

The present invention relates to a dimensionally stable oxygen-evolving anode for use in an electrolytic cell for the production of aluminium. The anode comprises of a container made from an alloy comprising aluminium and at least one metal more noble than aluminium; a fluid bath in the bottom of the container having the ability to dissolve aluminium, said fluid having a density that is higher than the density of molten aluminium at the operating temperature of the cell, a pool of molten aluminium floating on top of the fluid bath in the bottom of the container; a refractory layer arranged on the inner sidewalls of the container at least in the area of the pool of molten aluminium, said refractory layer protecting the molten aluminium from contacting the inner sidewalls of the container.

A composition for treating waters, e.g. ballast water or injection water for oil recovery, to kill in-situ aquatic invasive species comprises at least one biocide capable of killing both animal and plant micro-organisms. The at least one biocide preferably comprises Brilliant Green, Gentian Violet, and/or erythrosine, and a wetting agent or detergent-like compound such as CTAB or CTAC. The invention also relates to a system for treating ballast water in situ comprising means for injecting a composition for treating ballast water; means for measuring the flow rate or amount of ballast water to be treated; means for controlling the dosing of the composition; and means for storing or receiving the composition. The invention also relates to a method of detecting viable aquatic organisms in ballast water in situ comprising detecting metabolism in viable micro-organisms in ballast water and, therefore, measuring the efficacy of any treatment.

The invention discloses a high interface adhesion strength nanofiber composite filament bundle and a preparation method and application thereof. The preparation method comprises the following steps: 1, preparing a spinning solution with polymer, additives and solvent, wherein the polymer comprises one or more ingredients out of cellulose diacetate, cellulose triacetate, hydroxyethyl cellulose, polyving akohol and polyving akohol, and the additives comprise one or more ingredients out of ethanediol, glycerol, pentaerythritol, diacetin, glycerol triacetate, glycerol trioleate, glycerol palmitate and glyceryl stearate; 2, taking a cigarette-used filament bundle as base materials, conducting electrostatic spinning on the spinning solution which is obtained in step 1, and obtaining the high interface adhesion strength nanofiber composite filament bundle. By means of the high interface adhesion strength nanofiber composite filament bundle, the phenol release amount and NNK release amount in mainstream smoke of a cigarette can be effectively reduced, the phenol release amount is reduced by 16-30%, and the NNK release amount is reduced by 12-36%.

A nano rare-earth oxide is prepared from the inorganic salt of rare-earth element (Ce, La, Pr, Nd, or Tb) and ligand (oxalic acid, sodium oxalate, dicarbonate, 8-hydroxyquinoline, complexon, etc) through proportioning, mixing, and ball grinding while solid-phase chemical reaction to obtain precursor, removing impurities, drying, and medium-temp thermal decomposition. Its advantages are simple process, low cost, saving energy, high purity (more than 99%) and narrow size distribution (10-30 nm).

In a sludge thickener water/wastewater treatment system, sludge solids are recirculated with a mixer positioned in the influent column or offset from the center column and within the stilling well, in order to produce essentially constant sludge solids concentration in the sludge withdrawn from the thickener. This solves the problem of thickeners producing inconsistent underflow solids concentration and often exhibiting problems with binding of rake arms due to sometimes very high sludge concentrations. Also, dewatering steps that follow thickening typically require a relatively constant solids concentration for efficient operation.