107results about How to "Avoid biological contamination" patented technology

The device enables a second drop to be mixed in a first drop deposited on an electrically insulating layer of an analysis support, in a viscous liquid environment and to mix the resulting drop. The device comprises at least one injector forming the second drop above the first drop. After formation of the second drop, a voltage impulse is applied between a first electrode, arranged under the electrically insulating layer of the analysis support, underneath the first drop, and a second electrode arranged near the outlet orifice of the injector. The voltage impulse fosters the coalescence phenomenon between the two drops, while preventing risks of contamination of the injector by the reagent of the first drop.

The present invention provides an apparatus and a method to prevent biofouling of underwater optical systems using ultraviolet light generated from within a pressure vessel and through an optics window, without removing the optical systems from the water and without disbursement of chemicals into the water.

A method of making a facile, surface-independent, polyphenol coating is disclosed. In general, the method includes contacting at least a portion of the substrate to be coated with an aqueous solution containing one or more salts and one or more nitrogen-free phenolic compounds. Substrates of all kinds may be used, and compounds used to make the coating may include epigallocatechin-3-gallate (EGCG), epigallocatechin (EGC) and epicatechin-3-gallate (ECG), tannic acid, gallic acid, pyrogallol, and/or other nitrogen-free phenolic compounds. The coating made using the method, methods of using the coating, and kits comprising the coating precursors are also disclosed.

The use of an aromatic compound substituted with at least one heterocyclic amine and possibly additional substituents, such as medetomidine and clonidine, or a functionally analogous derivative thereof, as an agent for the inhibition of marine biofouling on a surface, by application thereon of said compound, is disclosed. Also a method for inhibition of marine biofouling on a surface by application of said compound is disclosed.

The invention relates to a device for irradiating an absorbing liquid, for example waste water to be disinfected, in a throughflow. Said device comprises at least two radiator units having one cylindrical UV radiation source and three concentric sheaths. A cooling medium for carrying off heat from the UV radiation source flows in a hollow space between the inner and the center sheath. The inventive device allows to use high-performance UV radiation sources and to evenly irradiate the zones of irradiation and prevents floating particles from settling down on the radiator units.

A copolymer comprising trans-1,3,3,3-tetrafluoropropene units and vinylidene fluoride units, and methods of making the same. A method of preventing biofouling on an article of manufacture, comprising applying such copolymer to the article of manufacture. A process of preparing a surface having a surface energy of between about 20 and about 30 mJ/m², comprising applying such a copolymer to a support. A method of preventing accumulation of ice on an article of manufacture, comprising applying such a copolymer to an article of manufacture. A method of preparing a polymer, comprising a step of adding trans-1,3,3,3-tetrafluoropropene/vinylidene fluoride copolymer as a polymer processing additive/aid to said polymer.

One or more portions of a streamer or other equipment of a seismic survey system (e.g., birds, buoys, deflectors, etc.) are covered with protective removable skin sections. A protective removable skin section includes a flexible sheet and a reversible closure system configured to join edges of the flexible sheet. The protective removable skin section may be mounted onboard of a vessel, when the equipment is deployed.

A rotary disc filter is provided with a system for inhibiting biological fouling from biological growth on filters that form a part of the rotary disc filter. A biocide is pumped from a biocide supply tank to a manifold and mixed with a backwash to form a backwash-biocide solution. The backwash-biocide solution is sprayed onto filter media during a backwashing operation and the presence of the biocide inhibits and eliminates biological growth on the filter media.

The workability of operation to be performed, while preventing chemical or biological contamination, using a biosafety cabinet and gloves attached to the cabinet is improved. A biosafety cabinet includes a workspace formed in a main body cabinet thereof. Air in the workspace is discharged to outside via filters. A vertically movable front shutter is disposed on a front of the workspace. A front opening is formed below the front shutter to be at a front of the workspace. The front shutter includes plural laterally movable small windows which are overlapped like layered sliding doors. One of the plural small windows is provided, on the workspace side thereof, with a pair of glove ports to which a pair of gloves for use in operation in the workspace can be air-tightly attached.

The present invention provides an organic insulating layer-based gradient-doped IGZO thin-film transistor and relates to the technical field of electronics. The organic insulating layer-based gradient-doped IGZO thin-film transistor comprises a substrate, a gate electrode, an organic insulating layer and a gradient-doped IGZO semiconductor layer, wherein the substrate, the gate electrode, the organic insulating layer and the gradient-doped IGZO semiconductor layer are sequentially arranged from bottom to top. On the gradient-doped IGZO semiconductor layer, a source electrode and a drain electrode are arranged in parallel. The gradient-doped IGZO semiconductor layer comprises a lowermost IGZO thin-film layer, an uppermost IGZO thin-film layer, and an intermediate IGZO thin-film layer, wherein the concentrations of the lowermost IGZO thin-film layer, the uppermost IGZO thin-film layer, and the intermediate IGZO thin-film layer are sequentially increased. According to the technical scheme of the invention, the problem that the IGZO semiconductor and the organic insulating layer are not matched in lattice so as to cause the damage of the subsequent DC magnetron sputtering to the organic insulating layer and the formation of a large leakage current can be solved.

A method of treating coffee cherries, comprising a refining step for separating and refining green coffee beans from coffee cherries, wherein the coffee cherries are steam treated, after which the green coffee beans are separated and refined.

The invention discloses a detection device and method for stream mode particle, including a sample preparing container, a sheath liquid preparing container, a flowing chamber, an accomodating container, a first constant current power source and a pressure monitoring device, the sample preparing container is connected to the flowing chamber via a sample conveying pipe, the sheath liquid preparing container is connected to the flowing chamber via a sheath liquid conveying pipe, the outlet of the flowing chamber is connected to a detecting pipe, the sample to be detected is driven by power to be delivered to the flowing chamber via the sample conveying pipe, the first constant current power source is connected to the sheath liquid conveying pipe and drives the sheath liquid to be conveyed to the flowing chamber via the sheath liquid conveying pipe. The sheath liquid is driven by the constant current power source, thus obviating the need of gas source device, reducing cost and facilitating miniaturization; by real time monitoring the pressure of the flowing chamber, regular flow or abnormal flow can be judged, to prevent risk of breakage of the detecting pipe caused by abnormal increase of pressure, and avoid biological pollution.

The invention belongs to the technical field of medical blood gas biochemical detection equipment, and relates to an integrated kit and a matched device thereof. The matched device consists of an integrated kit, an interface seat assembly, an analyzer bracket, a guide rail and a liquid path system; the integrated kit is composed of an encryption chip assembly, a kit body, a waste liquid bag assembly, a kit cover, a cleaning liquid bag assembly and a reagent bag assembly; and a cleaning liquid bag, a waste liquid bag and various standard liquid reagent bags are all internally packaged and sealed in the independent integrated kit in a combined and double-layer sealing mode. A double-needle layout is adopted on the waste liquid exhaust assembly, one needle is responsible for recovering wasteliquid, and the other needle is responsible for exhausting or overflowing the waste liquid; and once the waste liquid bag is filled with waste liquid or the waste liquid overflows along with gas, thewaste liquid can be reliably and completely recycled through the liquid path system, the safety of an operator is guaranteed to the maximum extent, and the integrated kit and the matched device can beapplied to medical diagnosis and clinical treatment of pneumonia infected by similar novel coronaviruses and used in cooperation with a blood gas biochemical analyzer.

A water treatment apparatus for treating water in a device using water as a circulating medium comprises an extractor line for removing water from the device and ozone generation means for producing and conveying a supply of ozone. A contactor/mixer member is provided and has an entry passage for receiving water from the extractor line and ozone from the ozone generation means. The contactor/mixer member has contacting passages for receiving a water and ozone mixture from the entry passage and is configured so as to create turbulence to intimately mix the water and ozone along at least a portion of its length. A return line is provided for receiving and transporting the water and ozone mixture from the contacting passages back to the device.

There are provided a method and an apparatus for treating organic matter-containing water, the method and apparatus being capable of inhibiting the multiplication of microorganisms in an activated carbon column and a reverse osmosis membrane separator and performing stable treatment over long periods of time in a process including active carbon treatment and subsequent RO membrane separation treatment with an ultrapure water production system for use in electronic device manufacturing plants. The method for treating organic matter-containing water includes an oxidizer addition step of adding an oxidizer to organic matter-containing water, an activated carbon treatment step of treating the organic matter-containing water that has been subjected to the oxidizer addition step with activated carbon, and a reverse osmosis membrane separation step of feeding the organic matter-containing water that has been subjected to the activated carbon treatment step into a reverse osmosis separation means, in which a combined-chlorine-based oxidizer is used as the oxidizer.

Composition and method for treating and/or preventing biological contamination using a biocide composition comprising at least one quaternary ammonium compound and urea. The method includes drying urea, and thereafter combining at least one quaternary ammonium compound and urea and may produce a potent biocide composition that is stable and able to chemically treat biological contamination in a variety of difficult to reach locations. Uses of the composition are also described.

The invention provides a colloidal gold immunoassay analyzer, which comprises a device bottom plate for providing installation space; a reagent strip rotating loading unit for automatically loading reagent strips; a sample unit installed on the equipment bottom plate for providing detection sample; a sample loading unit, installed on the bottom plate of the device, for loading the sample to be tested in the sample unit; a reaction disk unit, installed on the bottom plate of the device, for receiving the loading of the reagent strip rotating loading unit The reagent strip and the sample to be detected loaded by the sample loading unit, the sample to be detected reacts with the reagent strip; the detection unit is used to receive and detect the reagent strip reacted by the reaction disk unit. The colloidal gold immune analyzer provided by the invention can realize simultaneous detection of various samples, has various functions, convenient installation of reagent strips, and simple structure.

Disclosed is a treatment apparatus capable of inhibiting growth of microorganisms and carrying out long-term stable treatment in an activated carbon tower and a reverse osmosis membrane separation device during processes including activated carbon treatment and RO membrane separation treatment of a later step in a system for manufacturing ultrapure water used in an electronic device factory. A method for treating organic-matter-containing water includes: the slime-controlling-agent-adding step of adding a slime-controlling agent to organic-matter-containing water; the activated-carbon-treating step of treating with activated carbon the organic-matter-containing water having undergone the slime-controlling-agent-adding step; and the reverse-osmosis-membrane-separation step of passing the organic-matter-containing water having undergone the activated-carbon-treating step through means for reverse osmosis membrane separation, wherein the slime-controlling agent uses a combined chlorine agent produced from a chlorine-based oxidizer and a sulfamic acid compound.