5589 results about "Chemical agent" patented technology

A permanent non-resorbable implant allows surgical replacement of cartilage in articulating joints, using a hydrogel material (such as a synthetic polyacrylonitrile polymer) reinforced by a flexible fibrous matrix. Articulating hydrogel surface(s) are chemically treated to provide a negative electrical charge that emulates the negative charge of natural cartilage, and also can be treated with halogenating, cross-linking, or other chemical agents for greater strength. For meniscal-type implants, the reinforcing matrix can extend out from the peripheral rim of the hydrogel, to allow secure anchoring to soft tissue such as a joint capsule. For bone-anchored implants, a porous anchoring layer enables tissue ingrowth, and a non-planer perforated layer can provide a supportive interface between the hard anchoring material and the softer hydrogel material.

An apparatus and method for ultraviolet irradiation of air for the purpose of removing contaminants from that air is disclosed. A U-shaped ultraviolet bulb enshrouded within a quartz tube provides enhanced contaminant destruction characteristics. By combining a plurality of those bulbs in a chamber that is of polished aluminum, and further combining aluminum filters therewith, added irradiation enhancement is achieved. Further provided are baffles or baffling proximate the ultraviolet bulbs that cause the air to go turbulent thus drawing the air closer to the ultraviolet bulb and further enhancing the contaminant destruction characteristics. Moreover disclosed is treatment of substrates with a chemical agent that facilitates the arrest of contaminants from the air onto the substrate for further irradiation of the contaminants from the bulbs. This further irradiation breaks down the arrested contaminants thus providing the substrate with a self-cleansing effect.

A method and apparatus for treating gland dysfunction caused by gland obstruction in order to restore the natural flow of secretion from the gland comprises the application of a combination of energy, suction, vibration, heat, aspiration, chemical agents and pharmacological agents to loosen and thereafter remove the obstructive material'.

Disclosed is a novel polymeric composite including a nanoparticle filler and method for the production thereof. More particularly, the present invention provides a novel halloysite nanoparticle filler which has the generally cylindrical or tubular (e.g. rolled scroll-like shape), in which the mean outer diameter of the filler particle is typically less than about 500 nm. The filler is effectively employed in a polymer composite in which the advantages of the tubular nanoparticle filler are provided (e.g., reinforcement, flame retardant, chemical agent elution, etc.) with improved or equivalent mechanical performance of the composite (e.g., strength and ductility).

A system for delivering a chemical agent in the form of a spray or foam, which in a preferred embodiment involves the use of an aerosol dispenser to deliver a formulation containing both an anionic surface active agent such as sodium lauryl sulfate as a foaming agent and a chemical agent such as either hydrogen peroxide as a disinfecting chemical agent or natural sea water.

An integrated system for decontaminating an aircraft, its passengers, and items transported in the aircraft in the event of a known or suspected contamination of the aircraft by a pathogenic biological or chemical agent includes several mobile decontamination systems. A first decontamination vehicle (32) sprays a chemical decontaminant solution over an exterior of the aircraft. A mobile passenger recovery and treatment assembly (36) recovers passengers from the aircraft and decontaminates them with a human decontaminant solution. The assembly prevents escape of pathogenic agents into the surrounding environment. Luggage and other items are removed from the aircraft to a separate vehicle for decontamination or disposal. The aircraft interior (100) is then decontaminated with a gaseous decontaminant, such as hydrogen peroxide vapor delivered by a mobile generator (142).

A sensor and method for detecting biological and chemical agents comprising metal interdigitized electrodes coated with hybrid polymer-based conducting film and an instrument for applying electrical voltage to the electrodes and registering the change in voltage. The hybrid film also comprises indicator biomolecules encapsulated within the film or attached to it. When these indicator biomolecules come in a contact with a biological and chemical agent, morphological changes occur in the film and electrical current flowing through the electrodes is modulated. The change in current indicates the presence of a biological and chemical agent and is registered.

Fibrous sheet materials, such as are useful as facial tissue, bath tissue and paper towels, for example, are provided with chemical agents, such as certain salts, which create a temperature change in the sheet when exposed to a particular stimulant, such as water, for example. These materials can provide a soothing feel to the user, either in the form of cooling or heating, depending upon the particular chemistry involved.

The invention discloses an exploitation method for a wax precipitation oil reservoir. The method comprises the step of adding a chemical agent and thermal fluid into an oil layer to make crude oil in the oil layer smoothly seep into an oil well and then rise to the ground surface. The method has the advantages of effectively solving the problem of wax precipitation of the crude oil in the oil layer and exploiting the wax precipitation oil reservoir, greatly reducing the exploitation cost of the wax precipitation oil reservoir, prolonging the production period and increasing the yield of the oil well and enhancing the final recovery efficiency of the oil reservoir, along with easy implementation, safety and reliability and obvious economic benefit.

A method for using a double resonance effect within a grating-coupled waveguide (GCW) sensor, as generated from a light beam with a given span of wavelengths or angles, is provided. The method can be used for label-independent detection of biological and chemical agents, to interrogate biological-binding events or chemical reactions within a sensing region at increased sensitivity, and with decreased sensitivity to environmental perturbations. Also described is an optical interrogation system incorporating the method.

The present invention provides methods for preparing tissue for incorporation into xenografts and bioprosthetic devices. The methods of the invention make use of supercritical fluids to remove infectious materials and chemical agents from tissues, as well as to permeate a tissue with a chemical agent (e.g. tanning, cross-linking, and bioactive agents).

A method and apparatus for treating gland dysfunction caused by gland obstruction in order to restore the natural flow of secretion from the gland comprises the application of a combination of energy, suction, vibration, heat, aspiration, chemical agents and pharmacological agents to loosen and thereafter remove the obstructive material.

A method and apparatus for treating gland dysfunction caused by gland obstruction in order to restore the natural flow of secretion from the gland comprises the application of a combination of energy, suction, vibration, heat, aspiration, chemical agents and pharmacological agents to loosen and thereafter remove the obstructive material.

A contact lens is provided that is capable of being worn by a user. The lens includes a contact lens body having an eye-engaging surface placeable against a surface of an eye and an outer surface. Microphobic features are provided in the lens for eliminating microbes from the eye-engaging surface. Preferably, these microphobic features are chosen from a group consisting of electrical charge inducing agents, magnetic field inducing agents, chemical agents and textural features. In another embodiment of the present invention, a contact lens is provided that can include a reservoir portion capable of holding a performance enhancement agent for enhancing the performance of the lens. The performance enhancement agent can include such thins as sealant solutions, protective agents, therapeutic agents, anti-microbial agents, medications and reduced size transparent portions. In other embodiments, a wide variety of designs, materials and substances are disclosed for use with contact lenses.

Various embodiments include a method of producing chemically pure and stably dispersed metal and metal-alloy nanoparticle colloids with ultrafast pulsed laser ablation. A method comprises irradiating a metal or metal alloy target submerged in a liquid with ultrashort laser pulses at a high repetition rate, cooling a portion of the liquid that includes an irradiated region, and collecting nanoparticles produced with the laser irradiation and liquid cooling. The method may be implemented with a high repetition rate ultrafast pulsed laser source, an optical system for focusing and moving the pulsed laser beams, a metal or metal alloy target submerged in a liquid, and a liquid circulating system to cool the laser focal volume and collect the nanoparticle products. By controlling various laser parameters, and with optional liquid flow movement, the method provides stable colloids of dispersed metal and metal-alloy nanoparticles. In various embodiments additional stabilizing chemical agents are not required.

Materials are delivered into oil well reservoirs. Highly sensitive, mechanical, biological and chemical agents can be delivered to subterranean formations with rigid, impermeable capsules. A variety of treatments may be delivered to a subterranean formation.

The invention discloses an exploitation method of a thick oil type oil deposit, which comprises the following steps of: adding a chemical agent and hot fluid into an oil layer, enabling crude oil in the oil layer to be successfully seeped to an oil well and then enabling the crude oil to be raised to the ground from the inside of the oil well. The invention has the following advantages that: the invention can effectively solve the problem of phase precipitation of the asphaltene of the crude oil in the oil layer, can effectively exploit the thick oil type oil deposit, lowers the exploitation cost of the thick oil type oil deposit greatly, prolongs the production period of the oil well, increases the yield of the oil well, enhances the final recovery ratio of the oil deposit and has easy execution, high safety and reliability and obvious economic benefit.

A surgical device to stanch the flow of blood is disclosed. The surgical device can place an implantable adhesive over or around varices or other bleeders. The surgical device has a vacuum system for capturing tissue and an adhesive system to apply adhesive to the captured tissue. A vacuum chamber is used to contact tissue and contains a chamber therein for the reception of tissue. An adhesive applicator is provided within the vacuum chamber and moves longitudinally therein to apply adhesive to tissue. The surgical device can apply an adhesive patch to tissue or inject adhesive into tissue. Alternately, an adhesive actuator and a chemical agent can be dispensed to tissue within the vacuum chamber.

The invention provides methods of focusing an instrument for the acquisition of optical data from a tissue sample. Methods of the invention allow rapid focusing in the context of a diagnostic procedure in which rapid data acquisition is desirable. For example, inventive methods allow a user to focus an optical instrument quickly enough to obtain data within an optimal window of time following application of a chemical agent to the tissue. In one embodiment, a user focuses an optical instrument by aligning laser spots projected onto a tissue sample within rings that are superimposed at predetermined locations within the user's visual field. Preferred methods of the invention further comprise automatic validation to detect whether the spots are sufficiently well-aligned.

The present invention is a prosthetic for replacement of at least a part of the nucleus of a intravertebral disc. The prosthetic device is composed of at least two essentially parallel soft layers of an elastically deformable hydrogel and at least one rigid layer, the rigid layer having less compressibility than the soft layers, being adjacent to the soft layers, parallel to them, and firmly attached to them. In some embodiments, the soft layers have the same thickness and composition. Typically, the prosthesis has more than one rigid layer and these rigid layers have the same thickness and composition. The number of soft layers is usually one more than the number of rigid layers, with, e.g., at least three soft layers. The invention also includes a method of prosthesis production, which involves prefabricating soft and rigid layers; stacking at least two prefabricated soft and at least one prefabricated rigid layer in a parallel fashion into their final form, and, permitting the layers to firmly connect to one another by mutual interaction. In this method, at least one type of the layers is prefabricated in the dehydrated state, which is done by dehydrating stretched foil in an apparatus preventing its contraction and thereby decreasing its area. There is at least partial dehydration of the prosthesis under pressure applied in a direction tangent to the planes of the layers. In preferred embodiments, while in the state of almost full dehydration, is sterilized using ionizing radiation or a gaseous chemical agent, after which it is partially rehydrated within the sterile wrapper using water vapor.