255results about How to "Increase ionic strength" patented technology

An electrochemical immunosensor system with reduced interference, comprising: a first immunosensor that generates an electrochemical signal based on the formation of a sandwich between an immobilized antibody, a target analyte and a labeled antibody, wherein a portion of the signal arises from non-specific binding of the labeled antibody in the region of the first immunosensor, and a second immunosensor that acts as an immuno-reference sensor and generates a signal that is the same as or predictably related to the degree of non-specific binding which occurs in the region of the first immunosensor, and has an immunocomplex between an immobilized antibody and an endogenous or exogenous protein that is in the sample and that is not the target analyte.

The invention provides compositions containing polypeptides, including therapeutic polypeptides such as interleukin-11, that are suitable for oral administration.

The invention relates to a buffer solution for suspending animal or human cells and for dissolving biologically active molecules in order to introduce said biologically active molecules into the cells using an electric current and to a method for introducing biologically active molecules into animal or human cells using an electric current and a buffer solution. The inventive buffer solution has a buffering capacity of at least 20 mmol*I⁻¹*pH⁻¹ and an ionic strength of at least 200 mmol*I⁻¹ during a change to the pH value from pH 7 to pH 8 and at a temperature of 25° C. The use of a buffer solution of this type in the corresponding method allows biologically active molecules to be introduced into animal and human cells with a high degree of transfection efficiency and at the same time a low cell mortality. Different cell types, in particular dormant and actively dividing cells of low activity, can be successfully transfected in said buffer solution.

The present invention provides a treatment for enhancing the ability of the body to heal wounds. A topical cream is described which improves blood flow by the transdermal delivery of the nitric oxide precursor L-Arginine either alone or with an adjunct, theophylline. The delivery of the active agents is accomplished by use of a vehicle which contains a hostile biophysical environment which is also hostile to hydrogen bond formation.

Media and devices, such as anion exchangers including such media, wherein the media is a membrane having a surface coated with a polymer such as a polyallylamine. The resulting membrane offers stronger binding of protein impurities and superior removal of host cell proteins from biological samples than conventional ligands based on quaternary ammonium salts, including trimethylammonium ligands. Also described is a chromatography scheme and method for purifying monoclonal antibodies, wherein the anion exchange sorber is placed downstream of an affinity column (such as Protein A or Protein G affinity column) and optionally one or more polishing devices such as cationic exchange columns. Little or no dilution of the cation exchanger pool (or affinity column exchange pool where no cation exchanger is used) is necessary to lower the conductivity of the sample. The sorber functions well to strongly bind host cell proteins and other impurities in biological samples even at high conductivities and pH.

The method is for controlling a sodium and sulphur balance of a pulp mill while separating lignin from black liquor. Lignin is precipitated by using an acid followed by filtration. The lignin filter cake thus obtained is re-suspended in acidic liquid and dewatered to form a second cake. The filtrate obtained after dewatering of the second cake is returned for washing and suspension of the first cake. Sodium sulphate-rich ESP (electrostatic precipitator) dust produced in the recovery boiler is used in the washing of the precipitated lignin cake.

The invention provides ultrafine spheroidized rare earth polishing powder and a process for making the same. The process comprises the following steps that: one of or the mixture of ammonia water, ammonium bicarbonate and ammonium carbonate is used as precipitant; ammonium salt and fluoride ions are added into precipitated slurry to adjust the ionic strength in mother liquid, so as to increase the surface electrical property of solid particles in the slurry; after high temperature aging, the ultrafine rare earth polishing powder with good dispersity and high spheroidization degree can be obtained by filtering the slurry, drying, burning, ball-milling and sieving filter cakes. The average particle size of the obtained polishing powder is between 0.02 mu m and 2.0 mu m, wherein the specific surface area BET is more than 0 and less than 10 m<2>/g, and the powder is in a well-dispersed spherical shape. The powder is used for polishing optical glass, crystal, display screens, etc., strong in cutting force, few in scratch and long in service time.

A novel method for selectively removing leaked protein A from antibody purified by means of protein A affnitiy chromatography is disclosed.

Silicone emulsion comprising: at least about 0.025% and less than about 10% of silicone oil; an active amount to emulsify said silicone oil and reduce surface tension of said composition of a surfactant system; and a an effective amount of a buffering system to maintain a pH of said composition to be at least about 6 for a period of at least about 3 months, are useful for controlling wrinkles in fabrics.

Antimicrobial granules comprising granular materials coated with antimicrobial metal agents for use in various surface coating and grouting materials are provided. The antimicrobial granules have utility in imparting durable, safe, inexpensive and powerful antimicrobial properties to materials into which they are incorporated, such as epoxy coating and grouts for surgical theaters, public washrooms, and food processing plants. The granules further are capable of imparting a timed-release dosage of antimicrobial agents so that the effectiveness of the coating is palpable for extended periods.

The present application concerns concentrated protein formulations with reduced viscosity, which are particularly suitable for subcutaneous administration. The application further concerns a method for reducing the viscosity of concentrated protein formulations.

The present invention includes processes to create wormholes in carbonate reservoirs by contacting a formation with a solution comprising glutamic acid N,N-diacetic acid (GLDA) and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention also includes processes to remove wellbore damage in a carbonate reservoir by contacting a damaged zone of the carbonate reservoir with a solution comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention further includes solutions comprising a salt and further comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof.

Methods and systems for use of switchable water, which is capable of reversibly switching between an initial ionic strength and an increased ionic strength, is described. The disclosed methods and systems can be used, for example, in distillation-free removal of water from solvents, solutes, or solutions, desalination, clay settling, viscosity switching, etc. Switching from lower to higher ionic strength is readily achieved using low energy methods such as bubbling with C0₂, CS₂ or COS or treatment with Bronsted acids. Switching from higher to lower ionic strength is readily achieved using low energy methods such as bubbling with air, inert gas, heating, agitating, introducing a vacuum or partial vacuum, or any combination or thereof.

The invention provides a method for treating hydrochloric acid leachate of ferrotitanium materials. The method comprises the following steps of: dividing and burning leached mother liquid which is obtained by leaching the ferrotitanium materials by using hydrochloric acid leaching liquid; recovering hydrogen chloride obtained by burning for regeneration and cyclic utilization of the leaching liquid. By the method provided by the invention, the leachate is divided according to material balance of the leach elements (mainly comprising iron) of the hydrochloric acid leachate; and one part of theleachate after division is burned and the other part of the leachate is directly or indirectly absorbed by the hydrochloric acid to return to the leaching procedure, so that completely closed circuitcirculation is formed. By the method provided by the invention, the defect of overlarge energy consumption in the burning procedure after the ferrotitanium materials are leached by the conventional hydrochloric acid can be overcome and the burning quantity of the leached mother liquid can be reduced by 40 to 55 percent, so that the energy consumption of the whole process can be reduced by 35 to 45 percent. The method has a good industrial application prospect.

The invention relates to compositions and methods for gene expression analysis. In some embodiments, the invention provides compositions and methods for amplifying targets in a degraded nucleic acid sample. In some embodiments, the invention provides methods for determining the quality of nucleic acids (e.g., the degree of degradation) in a nucleic acid sample. The invention also provides methods for producing a gene expression profile from a degraded RNA sample.

A method of isolating target nucleic acid molecules from a solution comprising a mixture of different size nucleic acid molecules, in the presence or absence of other biomolecules, by selectively facilitating the adsorption of a particular species of nucleic acid molecule to the functional group-coated surface of magnetically responsive paramagnetic microparticles is disclosed. Separation is accomplished by manipulating the ionic strength and polyalkylene glycol concentration of the solution to selectively precipitate, and reversibly adsorb, the target species of nucleic acid molecule, characterized by a particular molecular size, to paramagnetic microparticles, the surfaces of which act as a bioaffinity adsorbent for the nucleic acids. The target nucleic acid is isolated from the starting mixture based on molecular size and through the removal of magnetic beads to which the target nucleic acid molecules have been adsorbed. The disclosed method provides a simple, robust and readily automatable means of nucleic acid isolation and purification which produces high quality nucleic acid molecules suitable for: capillary electrophoresis, nucleotide sequencing, reverse transcription cloning the transfection, transduction or microinjection of mammalian cells, gene therapy protocols, the in vitro synthesis of RNA probes, cDNA library construction and PCR amplification.