245 results about "Plasma sterilization" patented technology

A surgical instrument for treating body tissues through narrow body passages employs an elongated cantilevered beam having a proximal end supported in a rigid block and a narrower distal end extendable through the narrow passages. One or more piezoelectric actuators are fixed to the beam surface and energized from an AC source through electrodes interspersed with the piezoelectric actuators to produce oscillatory motion of the beam distal end in multiple modes of movement with sensing electronics to monitor and control the distal mechanical movement. The oscillatory beam is assisted with cold plasma sterilization of the target tissue surface to be treated at the distal end.

There is provided a process for sterilizing a dielectric contaminated object having at least one hollow part. The process comprises (a) producing a plasma by submitting a gas or a mixture of gases to an electromagnetic field; (b) treating the exterior of the object by means of an after-glow of the plasma; and (c) treating the at least one hollow part of the object by means of a discharge of the plasma, the discharge being produced inside the at least one hollow part. Step (c) is carried out before or after step (b). This process is particularly useful for sterilizing various medical or dental instruments. There is also provided a device for carrying such a process.

A sterilization indicator for testing the effectiveness of a sterilization procedure comprises a source of an enzyme, a sterilant-resistant chemical associated with the enzyme, and a substrate that reacts with the enzyme to form a detectable enzyme-modified product that provides an indication of the failure of the sterilization procedure. The sterilant-resistant chemical may be a polyglycerol alkyl ester, polyglycerol alkyl ether, an ethoxylated polyhydric alcohol ester, or a polyhydric alcohol ether. The indicator may be used to test the effectiveness of a hydrogen peroxide plasma sterilization procedure and may be provided with a non-challenge test pack or a lumen-challenge test pack.

The invention discloses a three dimensional biology printing device and a three dimensional biology printing method. The three dimensional biology printing device comprises a printing platform, a spray head, a spray head electric controller, two CCD (charge coupled device) optical systems with light sources, a plasma sterilization mechanism, a motion control system, a pneumatic control mechanism, a humidity regulator, a temperature control unit, a liquid storage tank, an open container which can contain a nutrient solution, an installation frame and a housing, wherein the installation frame is arranged in the housing and higher than the middle of the housing, the spray head is arranged on the installation frame, the optical systems are respectively arranged above the spray head and on a portion of the installation frame, on the left side of the spray head, the open container is arranged in the housing, the printing platform is arranged in the open container, a nozzle of the spray head faces downwards, and corresponds to the printing platform, the pneumatic control mechanism is installed on the exterior of the housing, and all the other units except the pneumatic control mechanism are located in the housing. The invention further provides the method using the three dimensional biology printing device to print a model. The three dimensional biology printing device does not need to be placed in a clean work room for use, is low in cost, can control a device environment, and is suitable for various biological materials and cells.

The invention discloses a combined electronic air purification device. The combined electronic air purification device comprises an anode plate and a cathode plate, wherein the anode plate is connected with a positive high-voltage power supply; the cathode plate is connected with a negative high-voltage power supply; dust collection and ventilation holes are distributed in the anode plate; the cathode plate is provided with electric discharge pins which are arranged at the parts corresponding to the dust collection and ventilation holes in the anode plate and extend into the dust collection and ventilation holes, so that the electric discharge pins on the cathode plate discharge negative electricity, and dust and ions in air around the electric discharge pins are provided with negative charge, and are adsorbed on the anode plate. The method integrates the characteristics of high-voltage static electricity sterilization and dust collection, plasma sterilization and dust collection and multi-point negative ion emission, prevents the problems that the static electricity generated in the high-voltage static electricity method is harmful to the health of people, and dust particles are difficult to collect in plasma purification, achieves the effect of emitting negation ions by a plurality of electric discharge pins, and can be used for purifying air with high efficiency.

The invention relates to a method for removing fine particulate matters in the air under the condition of home environment, belonging to the field of purifying treatment. A positive and negative high-voltage pulse charged area, an electrostatic coagulation area under the alternating electric field, a dust particle collection area, a plasma sterilization area and a negative ion area are sequentially arranged in an air channel; in the positive and negative high-voltage pulse charged area, the air to be purified is divided into two parts which are respectively introduced into particle charged areas, and the particle charged areas respectively have the positive and negative charges and are arranged in parallel, so that the positive and negative charges are respectively carried by the particles in the two parts of air, and charge particles can be formed; under the action of alternating current (AC) high-voltage or pulse AC high-voltage field, the positive and negative charge particles have motion collision with one another, and larger particles are coagulated; when passing through the dust particle collection area, the larger-particle dust is collected onto a grounding dust collection plate, so that the fine particulate matters in the air can be purified. After the method is used, in the home environment, the collection efficiency of the fine particulate matters with the particle sizes of less than 10mu m reaches more than 90%.

The present invention relates to a chemical indicator that is used to determine whether instruments and other products to be sterilized have experienced a sterilization treatment process or to confirm whether sterilization has been efficiently performed, by the color tone change of the indicator when sterilizing medical instruments and other products and the like by a hydrogen peroxide low temperature plasma sterilizing method. The present invention provides an indicator for plasma sterilization, wherein an ink comprising a colorless chromogenic pigment, a coloring assistant, a binder (a binding agent) and a solvent for dissolving these, is applied to or printed on a base material, and wherein a color tone change of the indicator occurs by a hydrogen peroxide low temperature sterilization method.

An apparatus with a narrow slit chamber generates plasma having non-equilibrium characteristics and a brush-like shape at a temperature near room temperature and at a pressure of about one atmosphere. Plasma gas enters the narrow slit chamber. An external power source provides power to electrodes near the exit that excite the plasma gas and produce a plasma jet having a brush-like shape that exits the chamber. The apparatus operates with low power consumption, and the temperature of the plasma is low. Glow-to-arc transitions are prevented using a ballast resistor and appropriate plasma gases with the narrow slit chamber design. The brush-like shaped plasma extends beyond the exit of the chamber, and possesses the reactive features of low-pressure or non-equilibrium plasmas. The plasma brush apparatus can be used for plasma treatment, plasma cleaning, plasma deposition, plasma sterilization, and plasma decontamination of chemical and biological warfare agents.

The invention discloses a dry-wet plasma sterilization device and method. The device is characterized by comprising a plasma generation module, a sterilization chamber, an activation water chamber and an air conditioner. The device works in the manner of generating plasmas for sterilization under low temperature and normal pressure, and under a dry-wet condition, activated particles generated by the plasmas are different, and the endurance of bacteria is different, so that sterilization effects better than those achieved by the independent use of a dry method or a wet method are achieved. Wet sterilization refers to atomizing and spraying the activated particles in the plasma activation water chamber into the sterilization chamber and condensing the activated particles on the surface and in a sterilized object to realize set sterilization without any dead angle. Dry sterilization refers to generating high-concentration activated particles directly acting on the object in the sterilization chamber for sterilization by virtue of the plasma generation module and removing surface residues left by sterilization treatment by virtue of dry hot airflow. Dry sterilization and wet sterilization are alternately carried out, and sterilization condition selectivity, low temperature, high efficiency and no residues are achieved.

The present invention relates to a sterilization indicator using a chemical indicator that is useful for hydrogen peroxide plasma sterilization treatment and a sterilization packaging material for storing an article to be sterilized by plasma sterilization treatment that has an indicator area formed from the sterilization indicator provided thereon. The plasma-sterilization indicator according to the invention, which includes one or more compounds (A) selected from the group consisting of adsorption indicators and metal chelate-titration indicators, and an organic metal compound (B) and is irreversible in discoloration and higher in discoloration speed, allows definite judgment of whether or not an article in a sterilization packaging material was previously subjected to plasma sterilization treatment and thus is useful as a plasma-sterilization indicator. It becomes possible to increase or control the discoloration speed and obtain a superior display performance by adding additionally a polyvalent alcohol (C) to the plasma-sterilization indicator. The sterilization packaging material according to the invention is a sterilization packaging material for storing an article to be sterilized by plasma sterilization treatment, part of which is made of a gas permeable paper or nonwoven fabric and which uses the plasma-sterilization indicator according to the invention for the indicator area, and allows definite judgment of whether or not an article therein was previously subjected to plasma sterilization treatment without affecting the sterilization performance.

A hydrogen peroxide filling system for the plasma sterilizer is composed of supporting frame, liquid storage tank, evaporator with nozzle, delivering pipeline between said liquid storage tank, and the high-precision metering pump with step motor, which is installed to said delivering pipeline.

The invention relates to a cold sterilization and fresh-keeping technology and method with high-voltage electric field low-temperature plasma for low-salt pickled vegetables and belongs to the field of food sterilization and fresh keeping. According to the technical scheme, the cold sterilization and fresh-keeping technology and method with the high-voltage electric field low-temperature plasma for low-salt pickled vegetables comprises the following steps: putting pickled and fermented low-salt pickled vegetables into a packaging bag (box), adjusting the concentration of a pickling and fermentation broth NaCl of the pickled vegetables to 2.5-4.0%, adjusting the total acidity to 0.4-0.6%, putting the pickling and fermentation broth into the packaging bag (box) according to a ratio of the pickled vegetables to the pickling and fermentation broth being 1:1(w/v), introducing a gas, and performing packaging; and under conditions that the temperature is 15-20 DEG C and the relative humidityis 50-70%RH, placing the packaging bag (box) between two electrodes of a high-voltage electric field low-temperature plasma sterilization device, and performing repeated treatment for 2-5 times in a short time-interval-multi-time sterilization mode, so as to complete the sterilization process, wherein t he voltage intensity is 55-65kV/cm, the frequency is 70-120Hz, the current is 0.3-0.8mA, the action time of a single time of an electric field is 20-60 seconds, and the interval time is 20-60 seconds. By adopting the method, the short time-interval-multi-time sterilization mode of the low-temperature plasma is adopted for the low-salt pickled vegetables, on premise that sensitive quality of the pickled vegetables is ensured, a function of killing flatulence reduction fungi can be achieved,the sterilization effect is remarkably improved, the shelf fresh keeping period can be remarkably prolonged, and large-scale automatic production requirements of local special pickled vegetables can be met.

Sterilization and cleaning of an escalator hand rail are performed. A sterilization and cleaning device including a hand rail; a plasma source for irradiating the hand rails with ions or radicals or UV light; an enclosure for housing the plasma source; a power source for generating plasma; a fan for generating relatively negative pressure in the enclosure; filter units for removing removed bacteria, viruses, and organic matters such as hand marks; and filter plates located backward and forward of a moving direction of the hand rail in the enclosure along the hand rail is provided.

The invention discloses a medical solid waste on-site handling method. In the method, a closed container which also serves as a high-temperature and high-pressure kettle and a plasma reactor is adopted, and the container is connected with a plasma generator, a vacuumizing device, a vapor generator and an exhaust and purification system. The closed container is used for performing plasma sterilization and high-temperature vapor sterilization. The two means are combined, the two sterilization means act on the medical solid waste in turn, the comprehensive effect of the sequential coordinated actions of the two sterilization means instead of the effect of a single action is achieved, and the final effect is complete due to the complementation of the two means. And the method is particularly applicable to medical solid waste.

The invention discloses a papermaking wastewater treatment method. The method comprises the steps of filtration, gas washing, pH adjustment, flocculating precipitation, decoloring, advanced oxidation and plasma disinfection. The method disclosed in the invention has substantially higher pollutant removal ability than the prior art; and ultraviolet light is introduced into a three dimensional electrode/electro-Fenton reaction system, and an anode plate with an ultraviolet photocatalysis performance and a particle electrode are adopted to substitute traditional electrodes, so the photoelectro-synergistic catalysis reaction of the three dimensional electrode/electro-Fenton reaction system is carried out by using ultraviolet light, the energy consumption of the three dimensional electrode/electro-Fenton reaction system is reduced, a synergistic catalytic oxidation effect is generated, and organic pollutions are efficiently and rapidly degraded. Fire coal flue gas waste is used to purify the papermaking wastewater, the acidic gas SO2 in the flue gas is used to neutralize in order to remove alkaline substances in the wastewater, and flue dust particles in the flue gas are used to remove short fibers and other suspension in the wastewater in order to realize treatment of wastes by using other wastes. Organic matters and other pollutants contained in water are effectively removed through a plasma discharge technology.

The invention discloses a high-voltage electric field low-temperature plasma cold sterilization method for packaged betel nuts. A betel nut product is put into a packaging bag (box) and the packagingbag (box) is filled with gas for sealed packaging, and the packaging bag (box) is placed between two electrodes of a high-voltage electric field plasma sterilization device under the condition of roomtemperature and relative humidity of 50 to 95% RH, and adopts a short-time-interval-multiple sterilization method under the conditions that the processing voltage intensity is 15 to 30 kv/cm, the single electric field action time is 20 to 40 seconds and the interval time is 30 to 90 seconds, and the treatment is repeated for 3 to 5 times. The packaged betel nuts use the high-voltage electric field plasma short-time-interval-multiple sterilization method to significantly improve the sterilization effect under the condition of ensuring the sensory quality of betel nuts, and the short-time-interval-multiple sterilization method can meet the large-scale automatic production requirements of packaged betel nut products.

Exemplary methods of treating tissue that has been harvested for transplant are disclosed herein. An exemplary method of preparing corneal tissue for transplant includes obtaining corneal tissue that has been harvested for transplanting and exposing the corneal tissue to a plasma-activated fluid for a period of time.

The invention relates to a low-cost sterilization and disinfection purification device and method for air in a livestock shed, which can be used for rapidly and effectively purifying, sterilizing and disinfecting air pollutants in a large-scale livestock shed. The sterilization and disinfection purification device comprises a negative-pressure fan, a positive-pressure fan, an air purification and disinfection system, a dryer and a plasma sterilization device which are controlled by a PLC (Programmable Logic Controller), wherein the inlet end of the negative-pressure fan is communicated with an air outlet of the livestock shed while the outlet end of the negative-pressure fan is communicated with the air purification and disinfection system; the outlet end of the air purification and disinfection system is communicated with the dryer; the outlet end of the dryer is communicated with a plasma sterilizing chamber; and the inlet end of the positive-pressure fan is communicated with the plasma sterilizing chamber while the outlet end of the positive-pressure fan is communicated with an air inlet of the livestock shed. When the device is used for purifying air, the negative-pressure fan is used for extracting polluted air out of the livestock shed, then the polluted air is sequentially introduced into the air purification and disinfection system, the dryer and the plasma sterilization device for sterilization and disinfection, then the treated air is introduced into the livestock shed via the positive-pressure fan; and therefore, the polluted air in the livestock shed is sequentially and circularly treated.

An apparatus which determines activeness/inactiveness of bacteria in real time by measuring a specific light emission spectrum upon performing sterilization using plasma to highly efficiently sterilize is provided. As solving means, plasma is irradiated on a processing target from a plasma source connected to an alternate-current power supply and light emission of the processing target caused by the irradiation of plasma is detected by a light emission intensity detector unit. Particularly, by detecting wavelength intensity of hydrogen or hydroxyl group, activeness/inactiveness of bacteria can be determined at an early stage. Thus, an appropriate output of a power supply for sterilization can be controlled.

The invention discloses a cleanser for nursing. The cleanser comprises a bottom plate. A storage box, an air blowing device, a controller, a liquid storage box and a liquid pump are arranged on the upper surface of the bottom plate. An ultraviolet lamp is arranged in the storage box. An air inlet of the air blowing device is provided with a filter screen, and an air outlet of the air blowing device is connected with the air outlet end through a guide pipe. A plasma sterilization device, a first heating device and a support are arranged in the air blowing device. The plasma sterilization device is located on the left side of the first heating device, and the support is located on the right side of the first heating device. A draught fan is arranged on the side face of the support. A temperature sensor, a second heating device and a liquid level sensor are arranged in the liquid storage box. The liquid pump is used for pressurization, so that flushing is thorough; the temperature sensor and the second heating device are arranged in the liquid storage box, so that cleaning liquid is constant in temperature; and by means of the air blowing device, sterile and warm air dries a cleaning portion, the comfort of a patient is improved, and the work efficiency and treatment quality of medical staff for treating wounds are improved.

The present invention relates to a method for treating plastic bottles comprising an operation for cold plasma sterilization with non-germicidal gasses and/or an operation for the cold plasma deposition of a diffusion barrier layer, said method being characterized in that said cold plasma delivers adjustable nonthermal energy to the entire inside surface of the bottle, said cold plasma being generated either through a distributed propagation of microwaves having a maximum intensity in the vicinity of said surface or by a hollow cathode system adapted to the bottle and supplied with pulsed DC and/or RF voltage. The invention also relates to the devices for implementing the method.

The invention relates to a cold sterilization method based on gold nanoparticles in cooperation with high voltage field plasma and belongs to the nanomaterial sterilization technology field. Concretely, polyvinylpyrrolidone (PVP) is employed to modify gold nanoparticles, PVP functional gold nanoparticles are prepared, gold-PVP and bacteria are mixed and cultured, then the mixture is placed between two electrodes of a high voltage field plasma generation device, and by utilization of surface plasma resonance direct influences of a high voltage field on the gold nanoparticles in the bacteria, sterilization effects are generated in cooperation. When the provided method is compared with methods of sterilization of simple gold nanoparticles and high voltage filed plasma sterilization, air regulation seal package is not needed, the sterilization time is short, the used voltage is low, good sterilization effects can be achieved only by utilization of a small amount of gold nanoparticles, the temperature does not change obviously during the treatment process, and the provided method has potential application values at the fresh food fresh-keeping package aspect.

The invention discloses an ionized hydrogen peroxide comprehensive plasma sterilization technology (normal temperature and pressure dissociation technology), and relates to the technical field of sterilization. Equipment used in the ionized hydrogen peroxide comprehensive plasma sterilization technology mainly comprises a machine and a control system, wherein the machine mainly comprises a sterilizing agent conveying system, a carrier gas conveying treatment system and a plasma generation module. The ionized hydrogen peroxide comprehensive plasma sterilization technology is used for solving the problems of long formaldehyde fumigation time and harm of residues to human bodies and meanwhile solving the problems that a gasified hydrogen peroxide sterilizer (high-temperature dissociation technology) needs to perform turbulence on sterilization environments, and otherwise, the problems of slow gas diffusion, sterilization dead angles and high requirements on environment temperature and humidity exist (the requirements on environments, facilities and the level of operators are high). The equipment for realizing biological purification through the ionized hydrogen peroxide comprehensive plasma sterilization technology has the advantages of small size, low energy consumption, low requirements on space, small corrosivity, relatively fast sterilization speed and good sterilization effect.