484results about How to "Avoid contamination risk" patented technology

A process for the cost-effective packaging of high purity polysilicon fragments has the polysilicon fragments being packaged automatically.

The invention provides an automated apparatus of cell culture having tanks of culture medium, of growth factors and of cells to be cultured, an incubator having a thermostated enclosure which houses a cell culture vessel, and control computer system. A supporting and agitation device of the culture vessel is provided in the enclosure, and the culture vessel is formed by a bag having at least one inlet port connected to the tanks and one outlet port connected devices for harvesting and storage of the cells after culture, these harvesting and storage devices and tanks being located outside the enclosure and being connected to the cell expansion bag ports by conduits which together with the cell expansion bag form a preassembled module passing through a wall of the enclosure.

The present invention discloses a disposable bioreactor, consisting of a container and a cap, which is connectable to the same and cannot be detached without destruction. For this purpose, the cap comprises a retaining structure with a plurality of locking arms running in the lateral direction, while the locking arms are adapted to be resiliently shortened in the longitudinal direction and to be locked vertically to the longitudinal direction in the container by way of a retaining surface.

Provided are a method and system for treating nickel-containing wastewater produced in anodic-oxidation hole sealing. The method and the system are low in equipment investment, low in treatment cost and capable of removing nickel ions in wastewater and meanwhile effectively degrading and removing organic pollutants. By adopting an efficient pretreatment technology, nickel in a strong-complexing state is subjected to complex breaking to form free-state nickel, organic matter molecule chains difficult to oxidize and degrade are broken and destroyed to form a small-molecule compound easy to treat, then the compound is further thoroughly oxidized through Fenton reaction, nickel ions in a complexing state are released, then alkali and a coagulant are added in a coagulating reaction link to remove the nickel ions in the wastewater again, most of nickel ions precipitate through flocculation and precipitation reaction, and the remaining nickel ions in supernate are absorbed again through a cationic resin exchanger. The wastewater discharge can continuously and stably reach the national first-level discharge standard, and the organic matter in the wastewater can be effectively oxidized, decomposed and removed.

The invention provides a resourceful treatment method for desulfuration wastewater. The resourceful treatment method comprises the following steps of (1), carrying out pretreatment on the desulfuration wastewater; (2), carrying out phosphate precipitation treatment on yielding water subjected to the pretreatment; (3), carrying out softening treatment on phosphate precipitated yielding water; (4), carrying out membrane separation treatment on softened yielding water, so as to obtain membrane separated produced water which is rich in monovalent ions and membrane separated thick water which is rich in bivalent and/or multivalent ions; (5), carrying out first advanced concentration treatment on the membrane separated produced water, so as to obtain first advanced concentrated produced water and first advanced concentrated thick water; (6), carrying out first evaporation and crystallization treatment on the first advanced concentrated thick water, so as to obtain a low-valent salt and evaporated liquor condensate; (7), carrying out second advanced concentration treatment on the membrane separated thick water, so as to obtain second advanced concentrated produced water and second advanced concentrated thick water; (8), carrying out second evaporation and crystallization treatment on the second advanced concentrated thick water, so as to obtain a high-valent salt and evaporated liquor condensate. The invention also provides a treatment system for implementing the method.

An assembly structured to clean the head portion of a stethoscope comprising a housing including a path of travel along which the head portion passes during cleaning. A supply of cleaning fluid is associated with a dispenser assembly which is cooperatively disposed relative to an activating assembly. The activating assembly is manually operated due to moveable engagement with the head portion as it travels along the path of travel. The activating assembly is thereby operatively positioned to activate the dispenser assembly when engaged by the head portion as it passes along the path of travel. The dispenser assembly delivers the cleaning fluid to an applicator assembly which distributes the cleaning fluid to the head portion and facilitates the cleaning thereof and removal of excess cleaning fluid there from.

The invention provides a reactor body and a multifunctional airlift tube photobioreactor. The reactor body, namely a reaction device, comprises two or more transparent perpendicular pipelines arranged side by side, and connecting tubes or connecting grooves communicated with the tops and the bottoms of the perpendicular pipelines respectively. The photobioreactor comprises the reactor body, a ventilation system and an optional parameter detection and control system. The invention further provides a microalgae culture method which comprises the step that the reactor body or the photobioreactor is used for carrying out photoautotrophic culture, photoinduction culture and mixotrophic nutrition culture of the microalgae. The multifunctional airlift tube photobioreactor has the advantages of being large in illumination specific surface area, high in gas-liquid mass transfer coefficient, small in fluid shear force and the like; engineering enlargement, cleaning and maintenance are easy, operation is convenient, high-density, high-efficiency and large-scale photoautotrophic culture, photoinduction culture and mixotrophic nutrition culture of the microalgae can be achieved, high-efficiency culture of photosynthetic bacteria can also be achieved, and meanwhile the multifunctional airlift tube photobioreactor can be used for microalgae carbon sequestration and wastewater treatment.

A contact lens dispensing container includes an upwardly opening receptacle, peelable cover sheet, and applicator. The receptacle is to receive a contact lens and storage solution, and the container having a peripheral flange providing a planar engagement surface surrounding the receptacle. The cover sheet is securable to the engagement surface to seal the container and peelable from the engagement surface to allow lens removal. The applicator includes a handle having first end and second end. The handle is pivotably mounted on the flange and having a carrier at the first end and a hand grip at the second end. The applicator is moveable between stowed position and deployed position, wherein in stowed position the carrier is received in the receptacle with the handle not extending above the engagement surface, and in deployed position the applicator is rotated from the stowed position so that the carrier is above the engagement surface.

The invention provides a blocking type intravenous infusion catheter device which comprises a rigid needle tube, a needle tube base, a flexible infusion catheter and an infusion catheter base, whereinthe rigid needle tube is used for piercing skin and vein walls; the bottom end of the needle tube is fixed in the needle tube base; the infusion catheter base is hermetically connected with the bottom end of the infusion catheter; the front end of the needle tube penetrates through a sealing plug and is positioned in the inner cavity of the infusion catheter; and the tip of the needle tube is exposed from an opening in the top end of the infusion catheter. The blocking type intravenous infusion catheter device is characterized by also comprising a movable blocking component which is externally isolated, at least the blocking part of the blocking component can enter the inner cavity of the infusion catheter through the inner cavity of the infusion catheter base under the driving of the external force, and the blocking part of the blocking component can move to the opening in the top end of the infusion catheter along the inner cavity of the infusion catheter and block the opening so asto prevent the blood from entering the inner cavity of the infusion catheter and simultaneously prevent the liquid medicine from entering veins.

The invention provides an integrative device of nebulization and trickle irrigation. The device comprises a water storage tank, a water inlet valve, a water inlet pump, a filter device, a fertilizer transport system, a blending device, a pressure pump for trickle irrigation, a trickle irrigation machine, a controller and a sensor group, wherein the filter device is used for primary filtration of an irrigation water source; the fertilizer transport system comprises a fertilizer tank and a pressure pump which is connected to the fertilizer tank through a pipeline and provided with a water valve for adjusting on the pipeline; the blending device is used for blending the water from the water storage tank with the fertilizer from the fertilizer tank according to a proportion to prepare a fertilizer solution; the pressure pump for trickle irrigation is used for pressurizing and pumping up the fertilizer solution; the trickle irrigation machine is used for conducting trickle irrigation; the sensor group is used for monitoring the growing environment of crops; the controller is used for controlling the operation of the device. The integrative device of nebulization and trickle irrigation is capable of realizing precise fertilizer preparation, scientific fertilization according to environmental parameters of water, soil and air, and has the advantages of extremely boosting utilization ratios of water and fertilizer, and improving irrigation efficiency.

The invention relates to the biotechnical field, particularly relates to the technical field of animal biological product engineering and more particularly relates to serum-free culture media and application thereof as well as a culture method of a classical swine fever virus by using the culture media. According to the preparation method of the serum-free culture media, with an MEM (minimum essential medium) as a base culture medium, based on research on growth and multiplication characteristics of a swine testis (ST) cell and the classical swine fever virus, by adding different components into the base culture medium, a series of swine testis cell serum-free culture media as well as classical swine fever virus multiplication serum-free culture media for different growth stages are obtained respectively; therefore, possible pollution risks of BVDV (bovine viral diarrhea virus) and an antibody thereof are avoided, cell adherence growth of the ST cell can be realized at the same time; and moreover, the ST cell can grow quickly, has an intact cell side, is full in individual and is capable of being sub-cultured for a long time.

The invention provides a handheld soil pore water sampler, which consists of an overground unit and an underground unit. The overground unit consists of a manual vacuum generator and a sampler; and the underground unit consists of a filter. The handheld soil pore water sampler can make the vacuum generator generate vacuum without electricity manually on site, and is particularly suitable for field operation; the vacuum generator, the sampler and the filter are combined, so that one-time sampling can be finished; the next sampling can be performed only by replacing the sampler, and the soil pore water sampler is convenient to operate; and a sample is not contacted with an overground negative pressure generation device in the whole sampling process, so that the risk that the water quality of the sample is polluted is avoided, and detection authenticity is ensured. The soil pore water sampler has a simple structure, small volume and low cost, is easy to manufacture, is labor-saving during operation, and is convenient to popularize.

The invention provides a desulfurated waste water resourceful treatment method. The method includes the steps that desulfurated waste water is pretreated to remove suspended matter and/or colloid and heavy metal ions; 2, pretreated effluent obtained in the step 1 is subjected to phosphate precipitation; 3, phosphate precipitation effluent obtained in the step 2 is softened, wherein softening comprises the procedures of ion exchange and/or coagulation, and optionally, softening further comprises the procedures of acidification and/or filtration; 4, softened effluent obtained in the step 3 is subjected to membrane concentration; 5, membrane concentration concentrated water obtained in the step 4 is subjected to evaporation and concentration, and evaporation and concentration liquid and evaporation and condensation liquid are obtained; 6, the evaporation and concentration liquid obtained in the step 5 is subjected to crystallization salt separation, and crystallized salt, the evaporation and condensation liquid and crystallized mother liquor are obtained. The invention further provides a treatment system implementing the method.

The present invention relates to a method for safely utilizing a livestock and poultry biogas liquid in a farmland, particularly to application of the alkaline effect of plant ash to adjust the livestock and poultry biogas liquid to achieve the alkaline condition, and addition of a soluble Mg<2+> salt to promote generation of struvite crystal in the livestock and poultry biogas liquid so as to achieve recovery of nitrogen and phosphorus in the livestock and poultry biogas liquid. In the application, the livestock and poultry biogas liquid containing the struvite crystal is directly applied on the soil, and the plant ash is applied, such that the struvite crystal is promoted to be slowly dissolved to release the PO4<3-> ions so as to achieve the efficient stabilization of the heavy metal ions. With the method, the recovery of nitrogen and phosphorus in the livestock and poultry biogas liquid, and the resource utilization of the agricultural plant ash waste are achieved, the struvite crystal separation and purification steps are eliminated, the resource utilization cost of nitrogen and phosphorus in the livestock and poultry biogas liquid is substantially reduced, and the purpose of the safe application of the livestock and poultry biogas liquid in the soil is achieved.

The present invention is one kind of tubular ultrafiltering and clarification and reeling ultrafiltering and separation combined process for separating apple protein, apple polyphenol, apple starch and pigment from apple juice. The process can lower the color value of apple juice, raise the quality one apple juice and utilize apple juice comprehensively. The process includes the steps of material screening, washing, drying, crushing and squeezing to obtain apple juice and apple residue, pasteurizing, enzymolysis with pectase and gelatinase, tubular ultrafiltering and clarification to obtain clear juice, great molecular weight protein, cellulose, starch and pectin, reeling ultrafiltering and separation to obtain purified juice and concentrate with rich apple polyphenol, small molecular weight protein and pigment, treating clear apple juice to eliminate pesticide residue and heavy metal and concentration, and ultrahigh temperature short-time sterilization of apple juice.

A pump comprising a tubular body delimiting internally a metering chamber and comprising an inlet orifice, an inlet valve, a stem mounted so as to be able to move inside the body and comprising an actuation tube delimiting an outlet duct, an insert assembled to the actuation tube and comprising a base placed inside the metering chamber and facing the inlet orifice, and a discharge orifice, an annular piston mounted so as to slide inside the body and on the stem, the piston and the base comprising annular surfaces suitable for forming a discharge valve, a ball-and-socket joint being arranged between the insert and the actuation tube.

A sample analyzer and a sample collection and distribution method thereof are provided. A sample collection and distribution module conducts a first collection on a sample to be tested; and then the collected sample is assigned to a plurality of measurement modules according to a predetermined sequence. Compared to a way of multiple sample collection and multiple sample distribution, the method provided by the invention simplifies the steps of sample collection and distribution, improves the test efficiency of liquid samples, and avoids the risk of sample contamination caused by a plurality of sample collections.

The invention relates to the field of medical mechanical devices, in particular to an intelligence mechanical arm for cutting and clamping a vein medicine injection glass bottle. The intelligence mechanical arm comprises a rotation mechanism and a cutting and clamping mechanism. The cutting and clamping mechanism comprises a cutting and clamping machine base, a cutter assembly, a bottle clamping assembly, a push rod assembly and a bottle rotating assembly. With the structure, the function of automatically clamping an ampoule bottle, the function of automatically clamping a powder bottle, the function of cutting an ampoule bottle head and the function of dumping trash in a rotation mode are achieved, efficiency of cutting glass bottles such as the ampoule bottle and the powder bottle is improved, in addition, the risks that particles of glass and a grinding wheel or glass fragments fall into medicine bottles and cause pollution due to misoperation are effectively avoided.