37results about How to "Avoid experimental failure" patented technology

The invention discloses a composite humic acid sponge bionic soil matrix, a preparation method and application thereof, and belongs to the technical field of material preparation and environmental treatment. After mixing polyether polyol and N-methylpyrrolidone, under the action of catalyst, cross-linking agent and chain extender, after stirring in a water bath, isocyanate is added dropwise to obtain polyurethane emulsion. In the foaming stage of polyurethane sponge, humic acid and The composite humic acid sponge biomimetic soil matrix is ​​obtained. It has both the growth effect of humic acid on plants, the complexation and adsorption effect on pollutant ions, and the light water absorption effect of sponge. The method has the advantages of simple operation, readily available raw materials, low equipment requirements and low cost. The prepared product is light in weight, uniform in pores, high in water absorption and water retention rate, can effectively promote plant growth, purify water quality, and is safe and environmentally friendly.

The invention discloses a device and method for sensitively detecting membrane permeation pressure value in membrane distillation process, wherein, the device includes a gas storage tank, a membrane permeation test component, a DC power supply, a high-sensitivity electric bridge and a diaphragm to be tested; the membrane The soaking test assembly includes an accommodating cylinder, a flange plate and a bottom plate, the diaphragm to be tested is located between the flange plate and the bottom plate, and a conductive sheet is arranged between the diaphragm to be tested and the bottom plate; the gas storage tank is reduced The pressure valve, the pressure regulator and the pressure gauge are connected to the storage cylinder; the upper terminal and the lower terminal are also arranged on the upper end of the storage cylinder and the lower side of the conductive sheet, and the DC power supply is connected with the upper terminal and the lower terminal. The connecting posts are connected; two lead posts are distributed on the side wall of the containing cylinder, and the high-sensitivity electric bridge is connected with the two lead posts; the method is to use the above-mentioned device to detect the membrane penetration pressure value. The invention can reflect the membrane wetting phenomenon through the electrical parameter detection of the membrane module, so as to quickly and accurately indicate that the system can bear the maximum operating pressure.

The invention relates to an animal spinal cord injury hitting device which comprises a fixator platform. Fixing rings are arranged at the two ends of the fixator platform, sliding grooves are formed in the fixator platform, limb fixing rings are arranged on the sliding grooves, spine fixing clamping plate assemblies are arranged on the two sides of the fixator platform, vertical rods are arranged at the end of the fixator platform and sleeved with a first scale fixing plate and a second scale fixing plate, a first sliding rail is arranged on the first scale fixing plate, a second sliding rail is arranged on the second scale fixing plate, a first clamping ring is arranged on the first sliding rail, a second clamping ring is arranged on the second sliding rail, an outer casing pipe is inserted into the first clamping ring, the end of the outer casing pipe penetrates through the second clamping ring, an inner casing pipe is arranged in the outer casing pipe, a hitting needle is arranged in the inner casing pipe, and a hitting needle frequency control device is arranged on the outer casing pipe, and connected with the hitting needle. Experiment failures caused by animal hiding are effectively avoided, experiment efficiency and experiment precision are guaranteed, the structure is simple, operation is easy, and the hitting device is worthy of application and popularization.

The invention discloses an animal fixation box. The animal fixation box comprises a rectangular frame which is formed by a front wall, two side walls (1) and a rear wall (2) in an enclosing mode and provided with an upper opening and a lower opening; a box bottom (3) is arranged at the lower opening of the rectangular frame, and a box cover (4) is arranged at the upper opening in a covering mode; the front wall is divided into an upper front wall (51) and a lower front wall (52), the upper edge of the lower front wall (52) and the lower edge of the upper front wall (51) are each provided with a semicircular notch, and the two semicircular notches can be matched with each other and locked through lock catches (8) to form a hole (6) used for fixing an animal to be fixed; the diameter of the hole (6) is larger than that of the neck of the animal to be fixed and smaller than that of the head of the animal to be fixed; one end of the box cover (4) is hinged to the top end of the rear wall (2), and the other end of the box cover (4) is connected with the upper edge of the upper front wall (51). The animal fixation box is wide in application range, fixation operation is easy and convenient, and the animal can be carried and moved with the animal fixation box conveniently.

The invention discloses a biochemical product syringe used for rodent experiments, and specifically relates to the technical field of medical instruments. The biochemical product syringe used for therodent experiments comprises an arcuate fixing plate; notches are arranged at middle parts of the bottom on two sides of the arcuate fixing plate in a penetrating way; first chutes are arranged, on two sides of the arcuate fixing plate, at the tops of the notches; first sliders are arranged at the bottoms of the notches; fixing holes are arranged at the bottom ends of the first sliders in a penetrating way; a through groove is arranged at a central position of the top of the arcuate fixing plate; and second chutes are arranged at middle parts of the inner walls on two sides of the through groove. According to the biochemical product syringe used for the rodent experiments, four limbs of rodents of various sizes can be fixed by utilizing the first sliders on the arcuate fixing plate. The trunk part of an experimental rodent can be fixed by utilizing an inflated airbag; sleeves are twisted so as to adjust distances between the top end of the sleeves and the bottom end of a second slider;and sleeve rings are twisted so as to adjust relative height of the sleeve rings on the syringe, thereby realizing adjustment on needle insertion depth.