225results about How to "No risk of contamination" patented technology

A method of making a lithographic printing plate comprising the steps of: a) providing a lithographic printing plate precursor comprising (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a photopolymerizable coating on said support, b) image-wise exposing said coating in a plate setter, c) developing the precursor, thereby removing the non-exposed areas of the coating from the support, whereby the developing step is carried out off-press in a gumming unit by treating the coating of the precursor with a gum solution.

A vial for storing multiple doses of a substance to be dispensed into one or more syringes or other delivery devices. The vial has a body, a variable-volume storage chamber within the body for storing multiple doses of the substance therein, and a one-way valve connectable in fluid communication with a syringe or other delivery device. The one-way valve is moveable relative to the body between first and second positions (i) one of which permits the valve to open so that substance from the variable-volume storage chamber can flow therethrough and into the syringe or other delivery device connected in fluid communication therewith, and (ii) one of which prevents the valve from opening.

The invention relates to a device for sampling tissue from an animal, comprising sampling means provided with at least one cutting element (35) for cutting and collecting a sample of tissue from the animal, and means (31) for storing the sample, into which the cutting element is inserted once the sample has been collected. According to the invention, the storage means (31) have at least two openings, a first opening (32) for receiving the cutting element and the sample, and a second opening (33) cooperating with the detachable closing means (34).

A disinfecting device for a handheld instrument is provided. The disinfecting device includes a receptacle having a cavity for supporting a portion of the handheld instrument, a germicide comprising an amount effective to disinfect the handheld instrument, and a germicidal carrier such that a portion of the handheld instrument contacts the germicide when the portion of the handheld instrument is supported in the receptacle. A disinfecting device for a fingertip is also provided. The disinfecting device includes a germicide effective to disinfect the fingertip, a support base having a cavity within the support base for containing the germicide, and a germicidal carrier for retaining germicide such that at least a portion of the fingertip contacts the germicide upon touching the germicidal carrier.

A liquid medicament dispenser includes a housing and a pump carried by the housing, a reservoir applied to the housing and containing a pre-filled sterile liquid medicament, a sterile tubing set routed through the pump, a sterile administration line carried outside of the housing and coupled aseptically to the sterile tubing set in fluid communication, and an aseptic connector coupled to the reservoir and the sterile tubing set and changeable from a storage state to a use state. In the storage state, the aseptic connector prevents the liquid medicament in the reservoir from moving to the sterile tubing set. In the use state of the aseptic connector, the aseptic connector defines a sterile passageway for the flow of the liquid medicament from the reservoir to the sterile tubing set.

The invention relates to a method for storing integrity of nucleic acids (DNA and RNA) in a sputum sample in the field of biology. The invention provides phlegm paper, which can be used for conveniently storing nucleic acids in the sputum sample at room temperature; nucleic acid protecting liquid is infiltrated on the phlegm paper, and can be used for inactivating nuclease in the sputum sample; DNA and RNA in the sputum are effectively prevented from being degraded, so as to store and transport the sputum sample. At room temperature (25-35 DEG C), the nucleic acids in the sputum sample can be stably kept for 7-14 days. Meanwhile, the invention also provides a corresponding nucleic acid extraction method.

The invention relates to a printing apparatus for printing bottles or similar containers, having several printing positions on a transport element, which can be driven in rotation, by which the printing positions and/or the containers are moved on a closed path of movement between at least one container take-up and at least one container drop, having rotating print heads for applying at least one print image, preferably multi-color, onto a region to be printed on the external container surface of the containers, in the event of relative movement of the external container surface and at least one print head, wherein at least one enclosure is present, into which each of the containers, which are provided at a print position, is housed during the printing process with at least the region to be printed thereof.

The invention discloses a method for separating and culturing primary chicken hepatocytes. According to the method, EGTA (Ethylene Glycol Tetraacetic Acid) with low hepatotoxicity is added into a perfusate A to loosen the junction between hepatocytes, so that the dispersion degree of the to-be-separated hepatocytes is increased; double resistance is added into the perfusate A, a perfusate B and D-Hanks flushing fluid, so that the pollution is further prevented; and circulating perfusion digestion is adopted during digestion perfusion, so that the perfusion cost is greatly reduced. A serum-free cultural method of the chicken hepatocytes is established; compared with a traditional serum cultural method, the method disclosed by the invention has the same effect on the aspects of cell quantity, activity, function and the like, so that the problems caused by the existence of serum are solved and a foundation is laid for the substance metabolism study and biological product preparation on the basis of the chicken hepatocyte culture.

The invention discloses a method for preparing a precursor of a positive material of a nickel manganese cobalt multi-element lithium ion battery. The method comprises the following steps of: firstly, dissolving nickel, cobalt and manganese with deionized water, and preparing a multi-element metal salt solution with the total metal ionic molar concentration between 0.8 and 2.5mol/L, wherein the molar ratio of nickel to cobalt to manganese elements in the multi-element metal salt solution is (0-1):(0-1):(0-1); secondly, preparing alkali solution with concentration between 2 and 4mol/L; thirdly, reacting the salt solution with the alkali solution, wherein the temperature is controlled to be between 40 and 70 DEG C and the stirring speed is controlled to be between 100 and 600 revolutions/min, and the adding speed of salt and alkali solutions is controlled, so that the pH value of the reaction system is controlled to be between 8 and 11; and continuously stirring for 30 minutes to 2 hours after the reaction is completed, standing for 2 to 4 hours, filtering to obtain solid matters, and washing with deionized water until the content of Na<+> is lower than 0.03 percent, and drying to obtain the required precursor of the positive material of the nickel manganese cobalt multi-element lithium ion battery. According to the invention, an ammonia complexing agent is not used, and the method has the advantages of no ammonia or nitrogen pollution risk, good product sphericity, uniform granules, narrow granularity distribution and the like.

The invention relates to a full-closed multi-index nucleic acid detection device. The device comprises a reagent cavity shell, an upper cover, a communicating vessel and a piston cylinder; a reagent cavity is formed in the reagent cavity shell, an upper cover is arranged on the reagent cavity shell, a sample adding hole is formed in the upper cover, the piston cylinder is arranged in the reagent cavity shell, a communicating hole is formed in a base plate of the piston cylinder, the communicating vessel is arranged below the piston cylinder, a communicating groove and a detection hole are formed in the communicating vessel, and an inner cavity of the piston cylinder can selectively communicate with a reagent cavity bottom hole by rotating the communicating hole; the reagent cavity comprises a sample pretreatment cavity, a lysis solution cavity, a magnetic bead cavity, a washing solution cavity and an eluate cavity, all the cavities are sealed cavities and can communicate with the innercavity of the piston cylinder through the communication hole and the communication groove, and the sample pretreatment cavity corresponds to the sample adding hole in position; and the detection holeonly communicates with the inner cavity of the piston cylinder and the reagent cavity through the communication hole. The device realizes full-sealing detection in the nucleic acid detection process,is convenient to operate and can realize simultaneous detection of multiple indexes of a single sample.

The invention relates to a new process for controlling side wall inclination angle during manufacturing of array type high-voltage LED chips. The new process includes forming large-angle inclination on a side wall of a silicon dioxide mask by means of wet etching, then copying the large-angle inclination to an LED epitaxial layer, and accordingly forming an inclination side wall structure of micro-units of high-voltage LED chips.

The invention belongs to the technical field of graphene preparation, and in particular relates to a graphene material based on a solid state mechanochemical reactor and a preparation method of the graphene material. According to the technical scheme of the invention, a three-dimensional strong shearing structure of the solid state mechanochemical reactor is utilized, a grinding aid is introduced in the graphite grinding process, the grinding aid and the graphite can be subjected to intense mutual friction caused by three-dimensional shearing force initialized by the three-dimensional shearing structure, then graphite can be peeled, and thus single-layer or small-layer graphene can be prepared. The preparation method comprises the following steps of: respectively drying graphite and the grinding aid, adding into a mixing machine, uniformly mixing, transferring into the solid state mechanochemical reactor for grinding, removing the grinding aid and impurity ions, and drying at 60-90 DEG C, thereby obtaining the high-performance graphene material of which the layer number is smaller than 8 and substrate defects are slightly caused. The novel preparation method of the graphene material provided by the invention has the characteristics of simplicity, high efficiency, cleanliness and low cost, the prepared graphene material has small substrate defects, and surface functionalization of graphene can be achieved at one step.

A device for treating a dental tissue comprising (a) an ozone generator for generating an ozone containing gas, (b) a first pump in fluid flow communication with the ozone generator for generating a flow of ozone containing gas, (c) an applicator for multiple teeth having a surface suitable for forming with the hard and soft dental tissue of multiple teeth to be treated (d) a treatment chamber having an inlet orifice in fluid flow communication with the ozone generator and the first pump and having an outlet orifice, and (e) a second pump in fluid flow communication with the outlet orifice of the applicator for removing gas from the treatment chamber. The second pump has a second throughput and the first pump has a first throughput whereby the ratio of the second throughput to the first throughput is at least 1.5:1.

The present invention relates to an apparatus for performing heat treatment of a bodily cavity in a mammal. The apparatus comprises a catheter intended for insertion into said bodily cavity, an inflatable balloon surrounding a distal end of said catheter in a liquid tight manner which balloon is adapted in use of said apparatus to be inflated and dilated in said bodily cavity, control means operatively connected to said balloon by at least one oscillation lumen and being provided with an oscillation assembly adapted to drive a heat transmitting fluid within said apparatus, and heating means adapted to heat said heat transmitting fluid. Said control means are adapted to control pressure and temperature of said heat transmitting fluid. The heating means have a heat emitting portion and a heat receiving portion which is use of the apparatus are positioned in thermal contact with each other, and which are separable from each other.

The invention provides an electroslag remelting device and an electroslag remelting method for refining metal scraps. The electroslag remelting device at least comprises a water-cooled crystallizer, an electrode, a bottom water tank, a power control cabinet and cables, wherein the water-cooled crystallizer is placed on the bottom water tank; a vibrating feeder for adding the metal scraps is arranged at the top of the water-cooled crystallizer; the electrode is a water-cooled electrode; the water-cooled electrode is mounted on a lifting cross arm; one end of the lifting cross arm is connected with an upright column, and can rise and fall along the upright column; the water-cooled electrode is inserted into the water-cooled crystallizer in a centering manner; the lifting cross arm and the bottom water tank are connected with the power control cabinet through the cables respectively. The electroslag remelting device is simple in structure and convenient to use, can effectively refine themetal scraps, does not bring refractory pollution, and does not cause an increase in the carbon content.

The invention relates to a deep scrap iron catalytic ozonation wastewater treatment method. The deep scrap iron catalytic ozonation wastewater treatment method is characterized in that (1) a passivation layer is formed on surface of scrap iron through chemical modification, wherein main components of the passivation layer are Fe(II) and Fe(III) oxides, so that a heterocatalysis oxidation mechanism to O3 is formed; (2) a certain amount of ion-state Fe<2+> and Fe<3+> are formed by virtue of scrap iron not subjected to surface modification during oxidation of O3, so that an in-phase catalysis oxidation mechanism to O3 is formed; and (3) a certain amount of iron ions are also produced when the surface modified iron ions are used as a catalyst. The surface modified iron ions can be taken as a coagulate flocculating agent, and a coagulant aid is added to form a coagulating sedimentation or contact filtration mechanism, so that the iron ions are removed, and organic matters in the water can be further removed. During catalytic ozonation of the prepared catalyst, COD removal rate of secondary biochemical treated effluent of general industrial wastewater is 50-80%, and the new national discharge standard requirement can be completely met, so that application value is not influenced.

A fast recovery diode includes an n-doped base layer having a cathode side and an anode side opposite the cathode side. A p-doped anode layer is arranged on the anode side. The anode layer has a doping profile and includes at least two sublayers. A first one of the sublayers has a first maximum doping concentration, which is between 2*10¹⁶ cm⁻³ and 2*10¹⁷ cm⁻³ and which is higher than the maximum doping concentration of any other sublayer. A last one of the sublayers has a last sublayer depth, which is larger than any other sublayer depth. The last sublayer depth is between 90 to 120 μm. The doping profile of the anode layer declines such that a doping concentration in a range of 5*10¹⁴ cm⁻³ and 1*10¹⁵ cm⁻³ is reached between a first depth, which is at least 20 μm, and a second depth, which is at maximum 50 μm. Such a profile of the doping concentration is achieved by using aluminium diffused layers as the at least two sublayers.

The invention relates to a passive valve for multi-valve devices for sealing a container or a line. According to one aspect of the invention, the passive valve is free of bearing supports which protrude in a positive sense out of the passive valve. The invention also relates to a multi-valve device for contamination-free connection of two containers or two lines with partial valves that can be rotated about a single axis. According to this aspect of the invention, at least three partial valves, which are arranged essentially parallel to one another and can be put under tension so they can be sealed with respect to their surroundings, can be rotated about the single shared axis.