42results about How to "Reduce mutual contamination" patented technology

The invention discloses a method for cultivating straw mushrooms, which comprises the following steps: (1) preparing a medium; (2) preparing a bacterial bag, bagging the medium, sterilizing, inoculating, and culturing to obtain hyphae; (3) Mushroom fruiting management: a. Cut off the bacteria bag prepared in step (2) from the middle, put the cut side up into the basket, and cover the film; b. After 1 to 2 days, lift the film and Spray water until the water in the basket is 1 to 3 cm deep; (4) Harvest. In the method for cultivating straw mushrooms of the present invention, the fungus bag is cut horizontally from the middle, which can stimulate the primordium of the straw mushroom to form neatly on the cut surface; the fungus bag is placed in the basket for mushroom fruiting management, which is more convenient to operate and improves work efficiency; Irrigation can well maintain the environmental humidity of the mushroom house, reduce the workload of water spraying, and avoid the phenomenon of shrunken mushroom buds and dead mushrooms caused by direct water spraying on the compost; the method of adjusting humidity through irrigation in the frame is easy to master and easy to promote.

The invention discloses a separable mask with an internal arching strip. The separable mask comprises mask cloth and bands for fixing the mask cloth, and is characterized in that an annular interlayer is arranged on the inner side of the mask cloth, the inner circumference of the interlayer is separated from the mask cloth, the interlayer is provided with an annular connecting line for connecting the interlayer with the mask cloth, and the connecting line is located on the outer side of the portion, separated from the mask cloth, of the interior of the interlayer to accordingly form a groove with an inwards-opened opening; a pressing piece is arranged and matched with the groove in size and shape to accordingly enable a part of the edge of the pressing piece to be installed in the groove, and separable connection with the mask cloth or the interlayer is accordingly achieved; the pressing piece is provided with a strip-shaped body arching towards the region, surrounded by the groove and located in front of the mouth or the nose, of the mask cloth, and the mask cloth is ejected through the strip-shaped body from the region, in front of the mouth or the nose, of the inner side of the mask cloth. Materials can be saved, the air impermeability can be improved, the effective air inspiration breathable area of the mask can be increased, the comfort of the mask can be improved, and the separable mask is healthier.

The invention belongs to the field of biomedicines, relates to an adenovirus chip and an application thereof and particularly relates to an adenovirus chip containing a human full-length genome and an application of the adenovirus chip. The adenovirus chip provided by the invention is prepared by printing adenovirus particles containing human full-length genes on a microscope glass chip. High-concentration adenovirus particles are produced, and high-concentration adenovirus is printed on a nitrated fiber glass sheet or other substrates by using a chip microarrayer. The adenovirus chip provided by the invention can also be converted into a protein chip. The adenovirus chip provided by the invention can be applied to multiple different biomedical researches including living cell analysis (cell growth and differentiation, cell apoptosis, tissue specificity genetic expression and analysis of cells to toxicity and sensitivity of micromolecules) and can also be used for immunity analysis, enzymatic activity analysis and promoter / reporter gene analysis.

The invention discloses a heat-sensitive umbrella type packer for sublevel mining. The packer comprises a power module, a packing module and a mining module; the power module comprises a drilling machine, a power head and a pump; the packing module is provided with upper and lower level umbrella-like packing rod systems with the same structure, wherein the packing rod systems are respectively positioned on the lower boundary between a target mineral layer and an upper lying stratum and the upper boundary between the target mineral layer and a lower lying stratum; the drilling machine drives amovable central pipe with a double-layer structure in the mining module to move upwards through the power head, and further drives the upper and lower level umbrella-like packing rod systems in the packing module capable of being axially folded and radially expanded, so that the upper lying stratum and the lower lying stratum are packed; and by using the packer, deep mining and layered mining of natural resources such as oil shale and the like can be effectively packed, so that the mining purity of minerals is improved, and cross contamination among the reservoirs is reduced.

The invention relates to a technology for handling and recycling copper-containing wastewater, in particular to a method for recycling copper from an etching solution through combination of multistage cross currents and counter currents. The method disclosed by the invention comprises the steps of extracting, water scrubbing, re-extracting and secondary water scrubbing; the copper ion concentration of final raffinate can reach 0.5g / L; and the purity of the electrolytic copper product is more than 99.95%. The method improves the utilization ratio of the extraction-electrolysis system and the electrolysis, and solves the problems about loss of the extracting agent during the cyclic process and cross contamination during the material cyclic process.

The invention discloses a linear control four-channel rotating switching valve for automobile oiling. The linear control four-channel rotating switching valve comprises an oil inlet system, a linear control flow diversion control system, a rotating switching valve body and oil outlet pipes. The oil inlet system comprises an oil filler and an oil filling pipe. The linear control flow diversion control system is used for controlling a control line fixed to a rotating valve element under the combined action of the rotating valve element and a reset spring so that the flow diversion controlling action of a baffle can be achieved. A drainage hole channel is formed in the rotating valve element, the rotating valve element is wrapped by a layer of oil-leaking-preventing seal cover, and the outer end of the rotating valve element is connected with a connecting rod and a handle. The bottom of each fixing valve shell is connected with the two oil outlet pipes. The linear control four-channel rotating switching valve is used for an automobile which is provided with four fuel oil tanks and controlling the switching among the oil tanks in the oiling process and can prevent cross pollution of oil gas volatilization among the oil tanks.