7 results about "Biological hazard" patented technology

The application discloses a micro-fluidic chip reagent injection device, which comprises a liquid storage part with at least one quantitative sealed container, a flexible pressure-bearing membrane arranged on the top of the container body of the quantitative sealed container, a hard flow guide column arranged on the bottom of the container body, and a sealing membrane arranged on the liquid outlet; a liquid inlet part comprising a flow column and a liquid storage pool arranged on the micro-fluidic chip, the inner cavity of the flow column is matched with the outer diameter of the hard flow guide column, a gas guide channel is arranged on the contact surface of the flow column and the hard flow guide column for connecting the inner cavity of the flow column with the external environment, and a puncture part opposite to the sealing membrane is arranged on the flow column; wherein the hard flow guide column has a first plug-in position for making the puncture part puncture the sealing membrane when the hard flow guide column is pressed down. The device has the advantages of simple structure, low cost, convenient use, accurate quantitative injection and biological hazard prevention. The application also discloses a micro-fluidic chip reagent injection method.

The invention discloses a large-scale cultivation method for larimichthys crocea fries, and belongs to the technical field of marine fish cultivation. The method aims at solving the problems that a traditional large yellow croaker fry breeding mode is poor in water flow adaptability, harmful biological hazards exist, operation depends on experience, and environment regulation and control are low in efficiency. According to the technical key points, a net cage system is constructed, an outer-layer large net frame and a double-layer netting are arranged, a small net frame is embedded, and a double-layer gradient netting is installed; fry are put, and water flow and feeding are managed; performing classified enemy screening and summer management; the method is characterized in that the double-layer netting forms a height difference area to put black sea bream seedlings, and a flow blocking net cage is arranged; the method is mainly used for realizing large-scale cultivation of larimichthys crocea fries, improving the survival rate and growth quality of the fries and improving the economic benefits of cultivation.

The invention discloses an ecological restoration management and control method and system for interplanting poplar and jerusalem artichoke in a windy and sandy area, and relates to the technical field of ecological engineering management and control, and the method comprises the steps: firstly collecting an environment parameter EP1 before planting, and calculating a wind erosion potential index W of each grid unit, so as to match differentiated planting planning parameters, and achieve the scientific layout according to local conditions; after planting, an environment parameter EP2 after planting is obtained, the daily compensation water amount ET is calculated, precise irrigation of the composite canopy is achieved, and the water resource utilization rate is increased. Meanwhile, a biological hazard index I is calculated, a patrol scheduling scheme APL is generated, and pest control is converted into active early warning from passive response. And finally, an irrigation scheduling scheme BPL is generated and sent to an automatic irrigation control terminal, a patrol scheduling scheme APL is sent to patrol personnel, key parameters are stored in a log data set HIS, a complete management and control process from data acquisition, scientific analysis to accurate execution is completed, and long-term health and stability of an ecological restoration project are ensured.

The invention relates to a blank substitute matrix for preparing dried blood spots and a preparation method of the blank substitute matrix, and belongs to the technical field of medical biological detection.The blank substitute matrix comprises a biological matrix which is a high polymer material, animal protein and / or plant polysaccharide; a toner; and a solvent. The method provided by the invention can be used for preparing the blank substitute matrix of the dried blood spot simply and safely at low cost, and the blank substitute matrix for preparing the dried blood spot has no biological hazard and good reproducibility.

The utility model relates to the field of environmental virus sampling devices, and discloses a public safety on-site space pathogenic microorganism sampling suit which comprises a preservation liquid tube, a sampling swab; the tube cover is arranged at the opening end of the preserving fluid tube and is used for sealing the preserving fluid tube; the outer rotating sleeve is arranged outside the preserving fluid pipe in a sleeving mode, and the preserving fluid pipe rotates relative to the outer rotating sleeve; the leakage detection structure is arranged at the joint of the pipe cover and the preservation liquid pipe, and when liquid in the preservation liquid pipe leaks, the leakage detection structure makes contact with the liquid and then changes color. According to the sampling set, efficient vortex mixing of liquid in the preservation liquid pipe can be achieved, a swab head sample can be fully split in the preservation liquid, micro leakage can be found in time by arranging the leakage detection structure, and the biological hazard risk is reduced.

The application discloses a propeller protection device and a propeller, which comprises a mounting frame connected with a propeller and a ship body; a protection structure surrounding the propeller, the upper part of the mounting frame penetrating out of the protection structure, the protection structure comprising a front protection cover and a rear protection cover, the front part of the front protection cover being provided with a water inlet grille and the rear part being provided with a clamping part, the front part of the rear protection cover being provided with a buckle part for clamping with the clamping part. The front protection cover and the rear protection cover are connected with each other through the buckle part and the clamping part, which is convenient for dismounting, cleaning and mounting. The water inlet grille can prevent fish or winding objects from entering the vicinity of the propeller, reduce biological hazards and damage of the propeller itself, and limit the movement direction of fluid through the propeller duct composed of the front protection cover and the rear protection cover, thereby reducing the power lag of the propeller.