115results about How to "Eliminate the risk of contamination" patented technology

A medical valve connector comprising a tubular body having an inlet fitting of the male luer or luer-lock type with an inner tubular element displaceable axially from a retracted position for closing a passage of flow towards an outlet fitting to an advanced position for opening said passage of flow. A tubular body made of elastic material, set between the inlet and outlet fittings, tends to keep the inner tubular element in the retracted position. Also the outlet fitting can rotate and axially translate between a retracted position and an advanced position.

A radiation sensing method and device that is used to measure physical properties of materials over a wide dynamic range. The sensor (20) comprises multiple radiation sources and multiple detectors at multiple separation distances. The detected signals from the different sources are separated and then combined mathematically in a manner such that the combination is self-compensated for both component drift and changes in radiation coupling efficiency between the source or detector and the material of interest. In a preferred embodiment, the biomass in a liquid cell culture (54) is measured with high accuracy over a wide dynamic range using optical wavelength radiation. The measurement can be made with the sensor external to the liquid culture container in a manner that is compensated for the thickness of the container window (50).

It is a problem to provide a microchip for analysis which is miniaturized, is disposable for ease to use, and does not have a risk of contamination in flow channels. On a substrate 2, a first flow channel having a buffer solution supply channel 6 and a reaction bath section 3, a second flow channel having a sample solution supply channel 5 and a waste solution channel 7, and a connecting channel 9 connecting both the flow channels upstream of the reaction bath section 3 are provided. The waste solution channel 7 and the reaction bath section 3 are connected to a waste solution tank 8 and a pump 11. After a ligand is modified in the reaction bath section 3, a sample solution is allowed to flow in the sample solution supply channel 5 and the waste solution channel 7, and a buffer solution is allowed to flow in the buffer solution supply channel 6, the connecting channel 9 and the waste solution channel 7, subsequently to flow in the buffer solution supply channel 6 and the reaction bath section 3. Then, a temperature adjusting section 13 and the pump 11 are set such that a desired temperature of a fluid and a flow rate are obtained. Subsequently, the sample solution is supplied to the sample solution supply channel 5, the connecting channel 9, and the reaction bath section 3, a binding reaction is brought between the ligand and an analyte in the sample solution, and the state of binding is detected.

The device consists of a shaft with a detachable brush tip. The brush tip is a new design incorporating the utility of an expandable self adjusting area that yields a complete sample of the endocervix and exocervix regardless of varying individual anatomy. The head will have protrusions disposed at strategic positions with flat surface collection areas. A ledge with protrusions will sample the exocervical area and a middle portion will sample the endocervical area. The brush tip is matched to a special collection container that permits the brush tip to be detached and deposited into said container without the handling of the brush/head area. In this fashion and utility the sampled cellular material can be completely, safely, and securely transported for laboratory evaluation.

The invention relates to a locking cap (1) made of a molded plastic material for a vessel (2) having a neck, intended for blocking a stopper (4) in said neck (3), including a wire-cap (6) adapted for surrounding the stopper (4) and the neck in the mounted configuration of the cap (1). The wire-cap includes first and second flexible tabs capable of being respectively blocked on the neck and on the stopper (4), said first tabs (8) being offset relative to said second tabs (9) in an axial direction relative to said neck (3). The cap (1) also includes a ring (7) surrounding the wire-cap (6) for preventing access to said tabs from outside the ring (7). The ring (7) and the wire-cap (6) are designed so as to be fitted and locked together. The tabs (8, 9) of the wire-cap are respectively arranged at an angle in first and second openings (13, 14) which are formed by the mesh of the wire-cap (6), and in which the tabs (8, 9) can disappear when mounting the cap (1) on the neck (3).

A sterile filling machine and related method are provided for sterile filling a container with a substance. The container includes a heat resealable stopper and a chamber for receiving the substance therein. The sealed, empty containers are subjected to radiation capable of penetrating through the stopper and chamber for sterilizing the container. The previously sterilized containers are then transported through an e-beam chamber, wherein an electron beam is directed onto a penetrable surface of the stopper to sterilize the penetrable surface. A needle is mounted within the e-beam chamber and moved into engagement with the stopper to pierce the sterilized penetrable surface of the stopper and inject the substance through the needle and into the chamber of the container. The needle is then withdrawn from the stopper and the filled container is transported outside of the e-beam chamber. Laser energy is then transmitted onto the penetrated surface of the stopper to fuse the stopper material and hermetically re-seal the stopper.

The invention discloses a processing method for cephalosporin dreg. The processing method comprises the following process steps of: (A) thermal alkaline hydrolysis and separation treatment: uniformly mixing cephalosporin dreg, water and alkali, carrying out constant-temperature alkaline hydrolysis reaction, and carrying out solid-liquid separation at a certain temperature after the constant-temperature alkaline hydrolysis reaction, so as to obtain sediments to be standby; and (B) anaerobic digestion treatment: inoculating anaerobic activated sludge into an anaerobic fermentation tank, mixing the sediments obtained in the step (A) with excess sludge produced by utilizing wastewater biological treatment, injecting the mixture into the fermentation tank, carrying out constant-temperature stirring, and carrying out biogas residue discharging and feeding during fermentation. According to the processing method for the cephalosporin dreg, drug residues in the cephalosporin dreg can be completely removed, the problem that the anaerobic fermentation of single cephalosporin dreg cannot be effectively sustained is solved, and the reduction and innocent treatment to the cephalosporin dreg are realized; and biogas residues produced during the processing process can be used for preparing raw materials of organic fertilizers, the produced sewage gas can be used as clean fuels, and safe and effective disposition and resource utilization to the cephalosporin dreg are realized.

A clarification method and apparatus, which can reliably remove heavy metals, including their sparingly soluble fractions, from a contaminated solid material containing the heavy metals, such as soil, sludge, sediments, wastes, or incineration ash, are provided. A reaction vessel 2 is divided into an anode zone 10 containing an anode A, and a cathode zone 20 containing a cathode C, by a diaphragm M provided between the anode A and the cathode C. The cathode zone 20 is supplied with a contaminated solid material containing heavy metals via a contaminated solid material supply means 22, an acidic substance or an alkaline substance via an acidic substance or alkaline substance supply means 24, and in some cases, water via a water supply means 26. A slurry of their mixture is maintained in the condition of a reducing atmosphere and a strongly acidic or strongly alkaline atmosphere to dissolve the heavy metals and electrolytically deposit the heavy metals on the surface of the cathode, thereby separating the heavy metals from the contaminated solid material and interstitial water.

The invention provides a vacuum spray-freezing granulation device and a method thereof. The device of the invention is characterized in that the device comprises a container; multiple atomizing nozzles used for atomizing and dispersing a liquid to be freeze-dried into liquid drops are arranged inside the container; and the container is connected to a vacuum system used for forming a vacuum environment in the container to make part components in the liquid drops to be vaporized and absorb heat in the vacuum environment so as to further cool and freeze the liquid drops to form granules. The method of the invention is completely different from a traditional freeze-drying granulation technology. By vacuum-pumping to freeze atomized liquid drops into granules, freezing rate of the liquid to be freeze-dried is greatly raised. According to the vacuum spray-freezing granulation device, a refrigerant nozzle is not arranged therein, a liquid nitrogen low-temperature zone is not arranged in the device, and a refrigerant is completely not used to contact with a material during the quick-freezing process so as to completely eradicate the risk that the material is polluted. Therefore, sterility of the freeze-drying process is raised, production energy consumption is reduced, and the environment will not be polluted.

The present invention relates to a manufacturing method for an opto-mechanical connector (10) and to the connector itself. The invention includes that a fixture (1) is manufactured with straight and parallel grooves (2,3) running on the upper side of the fixture (1) from a first fixture side (1a) to a second fixture side (1b), and which grooves (2,3) are intended partly for optical fibers and partly for guide pins. A lid (4) is attached above the fixture (1), whereafter optical fibers (8) from, for example, a fiber ribbon cable (6) are introduced into the grooves (2) intended for the fibers from the first fixture side (1a) so that the fiber ends (8) extend out through the second fixture side (1b). Guide pins (9) are furthermore introduced into the grooves (3) intended for the guide pins. The structure obtained (fixture (1), lid (4), fiber ends (8) and guide pins (9)) is completely or partially enclosed by a plastic capsule (11).

The invention discloses a bottled grease micro emulsion freeze-dried preparation with 13 composite vitamins. The preparation is prepared by wrapping lipid-soluble vitamins A, D, E and K in grease micro emulsion of which the particle size is smaller than 120nm, mixing with water-soluble vitamins B and C, folic acid, nicotinamide and the like, adding a freeze-drying forming agent and a redissolution additive, and freeze-drying. The novel freeze-dried preparation, which contains 13 vitamins and is developed according to the above formula and the preparation method, is simple in process, the stability of the vitamins can be improved, and the side effect caused by medicine decomposition and decomposition products is alleviated; the problem of codissolution of lipid-soluble vitamins and water-soluble vitamins is effectively solved, sufficient dissolution of medicine compounds is ensured, and the side effect of undissolved substances on human bodies is avoided.

The invention discloses a method for repairing cadmium-polluted farmland soil. The method comprises the following steps: selecting a cadmium-polluted farmland soil region, arranging soil ridges on the periphery of the region, and compacting and covering the peripheries of the soil regions by using waterproof films; after adding clear water which submerges the surface layer of the soil, turning over the soil; uniformly sprinkling a drip washing agent in the soil which is turned over, and fully stirring evenly, standing and discharging; and adding clear water in the soil, carrying out drip washing for 1-3 times, and fully stirring evenly, standing and discharging; and adding a conditioning agent in the soil, fully stirring evenly, standing, and moisturizing and maintaining to obtain the repaired farmland soil. The whole treatment process is simple, the cost is low, the period is short, the structure and the character of the soil are not affected, normal farming and planting of the land are not obstructed, heavy metals can be removed perpetually, and therefore, the method can be widely used for repairing the cadmium-polluted farmland soil.

The invention discloses a method for treating potassium chloride residues in an organic fluorination reaction. The potassium chloride residues are soaked with water in a soaking kettle, potassium chloride, potassium fluoride and sulfolane are dissolved in the water, carbide and water-insoluble organic impurities of tar are filtered and separated, the impurities are washed in hot water and then sent to a qualified solid waste treatment plant, and the washing water is used for soaking of the residues; soaking solutions enter an extraction kettle, sulfolane dissolved in water is extracted with an organic solvent and stands still for layering, an oil phase is desolventized, the organic solvent is recycled and returned for extraction, and the remainder is sulfolane; a water phase enters a settlement kettle, and precipitants are added into the settlement kettle and stirred until a precipitation reaction is sufficient; sediments are separated, washed and dried to obtain calcium fluoride, and the washing water is used for soaking of the residues; separating media enter an evaporator and are condensed to crystalize and dried centrifugally, and potassium chloride is obtained. According to the method, sulfolane, potassium chloride and potassium fluoride in the residues are all converted into qualified chemical materials except the organic impurities, so that the risk of environmental pollution is eliminated and considerable economic benefits are achieved.

The invention relates to a medical bag which is intended for the infusion of a medicament by means of gravity. The inventive bag comprises: at least two compartments, namely a first compartment (1) containing a medicament in the form of a solution and a second compartment (2) containing a rinsing solution; and means for separating/communicating the compartments, which prevent the rinsing solution from automatically entering the medicament compartment except at the end of the infusion period. The rinsing solution ends the infusion, by rinsing the medicament bag and the infusion line, such as to prevent any risk of contamination or leakage of residual medicament from the bag or line.

The invention provides a rainwater collection and processing control method. A rainwater collection and processing system applied by the control method comprises a control module, a sub-station systemand a start module, wherein the control module controls a chemical oxygen demand analyzer in a rainwater collection pool to sample rainwater in the rainwater collection pool, and analyzes a chemicaloxygen demand concentration value of the rainwater; the sub-station system comprises a sub-station controller, a waste flow controller well, a rainwater storage pool, a purifying device, a clean waterstorage pool and a sub-station control system; the start module starts a submerged pump in the rainwater collection pool when a chemical oxygen demand concentration value of the rainwater excesses arainwater emission standard and a rainwater level reaches a high liquid level of a liquidometer in the rainwater collection pool. The invention further provides a rainwater collection pool control method. Rainwater can be collected and processed and environmental pollution can be prevented.

The invention relates to a manufacturing method for a structure comprising semi-conductor material nanocrystals on a dielectric material substrate by chemical vapour deposition (CVD), the nanocrystals being covered by a layer of semi-conductor material nitride. The method comprises a step for forming stable nuclei on the substrate by CVD from a first gaseous precursor of the nuclei; a step of nanocrystal growth from stable nuclei by CVD from a second gaseous precursor; and a step for forming a layer of semi-conductor material nitride on the nanocrystals. The method is characterised in that the passivation step is carried out by selective and stoichiometric CVD of semi-conductor material nitride only on the nanocrystals from a mixture of the second and a third gaseous precursor selected to cause selective and stoichiometric deposition of the nitride only on said nanocrystals, wherein steps for forming the nuclei, forming the nanocrystals and passivation are carried out inside a same, single chamber.

The invention also relates to the formation of memory cells and flash memories comprising nanocrystals made according to the method of the invention.

The invention relates to a photo-Fenton-positive permeation integrated device for treating organic wastewater difficult to biodegrade and a using method of the device. The device comprises a photo-Fenton unit and an immersed positive permeation unit. The method for treating the water by using the device comprises the photo-Fenton process and the positive permeation process, and while organic pollutants are effectively degraded or converted by using the photo-Fenton unit, the organic pollutants which are not completely degraded or converted in the photo-Fenton process are permselectively intercepted by using a positive permeation membrane. The immersed positive permeation unit adopts an immersed positive permeation structure, a water inlet end circulating pump or an inlet water tank is notneeded, the overall structure is compact, the energy consumption is low, and the photo-Fenton-positive permeation integrated device is easily combined with other technologies or devices. Active substances generated by the photo-Fenton unit are used up in the pollutant degradation and converting process and in the positive permeation unit migration process, the strong oxidizing property of the photo-Fenton unit cannot affect the stability of the membrane, the wastewater treatment efficiency is high, the wastewater treatment effect is good, and the device is suitable for application and popularization.