71results about How to "The experiment went well" patented technology

The invention relates to an in-vitro eyeball fixator. The in-vitro eyeball fixator comprises an ice box, a flushing drainage tube, a rectus fixing part and a groove, wherein the groove is arranged in the ice box and matched with the shape of an eyeball to be arranged, a drainage hole is formed in the bottom of the groove, one end of the flushing drainage tube is connected to the drainage hole, the other end of the flushing drainage tube penetrates out of the bottom of the ice box, the rectus fixing part and the a rectus distribution position of the eyeball to be arranged are correspondingly arranged on the outer side of the edge of the opening of the groove, and the rectus fixing part and the rectus attachment point of the eyeball to be arranged are enabled to be consistent with the horizontal plane of the in-vitro eyeball fixator. According to the in-vitro eyeball fixator, the eyeball can be fixed on the eyeball fixator normally, separation and taking of various eye tissues by researchers at all levels in the ophthalmology field are facilitated, smooth eye experiments are guaranteed, the problem of fixation during operations of in-vitro eyeballs or various separation experiments for eye tissues is solved, and smooth experiments are guaranteed.

The invention relates to equipment used in animal houses, in particular to a neck yoke used for sheep raised in a house. The sheep neck yoke comprises an upper end cross rod, a middle cross rod, a lower end cross rod and vertical rods on the left and the right of a sheep house, supporting rods are arranged between the upper end cross rod and the middle cross rod in the vertical direction, supporting rods are arranged between the middle cross rod and the lower end cross rod in the vertical direction, the middle cross rod is fixedly provided with a sliding rod, linkage rods are arranged on the sliding rod at intervals, and position controlling holes are formed between the linkage rods and the sliding rod and between the lower end cross rod and the supporting rods adjacent to the lower end cross rod. The sheep neck yoke is simple in structure, the sliding rod is arranged on the upper end cross rod of the sheep house in a sleeved mode, the upper ends and the lower ends of the position control holes are a part of the sheep house, the sheep neck yoke is firm and is not prone to being damaged by sheep, the service life is prolonged, materials are saved, and cost is saved.

The invention relates to the technical field of chemical experiment equipment, and discloses a test tube rack for a chemical laboratory. The test tube rack comprises a base, wherein vertical rods arefixedly installed at four corners of the top of the base, sliding blocks are in movable sleeved connection with the bottom ends of inner cavities of the vertical rods, adjusting rods are fixedly installed at the tops of the sliding blocks, the top ends of the adjusting rods penetrate the vertical rods and extend to the outside of the top ends of the vertical rods, and rotating devices are fixedlyinstalled at the top ends of side surfaces of the vertical rods. According to the test tube rack for the chemical laboratory, the adjusting rods are driven by rotating gears to move vertically by/under cooperation of the rotating gears and the adjusting rods, so that height of the adjusting rods from the base is changed, and the test tube rack can be used for placing test tubes with different heights; rotating blocks are rotated, the adjusting rods are fixed by pressing blocks, the adjusting rods cannot descend due to own gravity and weight of test tubes, the experiment can be smoothly conducted, and practicability of the test tube rack is improved.

The invention provides an artificial slope surface structure for physical resistance experiment measurement,which comprises a base,an angle adjusting disc and a sliding block; an upward side guard board is fixedly connected with the front end and the rear end of the base respectively,a charging head is arranged in the front end plane of the side guard board at the front end of the base,and a datatransmission interface is arranged in the rear end plane of the side guard board at the rear end of the base. According to the invention,an inclined plate capable of ignoring force of friction,a first-stage friction bottom plate,a second-stage friction bottom plate and a third-stage friction bottom plate are arranged,and the friction resistance relationship among the first-stage friction bottom plate,the second-stage friction bottom plate and the third-stage friction bottom plate is 1-fold,2-fold and 3-fold sequentially,thereby being capable of forming a sharp contrast experiment at the time of performing the physical experiment,and facilitating accepting more vivid learning experience for students,regular growth of friction resistance facilitates summarizing various stress relationships on the inclined plate for the students.

The invention relates to a fishing, temporarily-storing and parching device special for water maze experimental rats. The device comprises a moving frame body, experimental rat storing cages and an experimental rat temporarily-storing platform, the moving frame body has four layers, multiple experimental rat cage placement cells are made on each layer, each experimental rat storing cage is slidably mounted in the corresponding experimental rat cage placement cell, an infrared electric parching lamp is arranged at the top end of each experimental rat cage placement cell, a retaining plate is hinged at the top end edge of each experimental rat cage placement cell, the lower end of each retaining plate does not contact with the corresponding experimental rat storing cage, and an experimentaltool storing cabinet and the experimental rat temporarily-storing platform are arranged on the lower portion of the moving frame body; a water maze special lamp mechanism is arranged at the top end ofthe moving frame body and comprises an inverted lamp cover and an incandescent lamp mounted in the lamp cover, and one side of the inverted lamp cover is connected with the top end of the moving frame body through hinges. The device is simple in structure, simple and convenient in operation and capable of greatly improving water maze experiment efficiency.

The invention discloses a protective cover for chemical experiments in the senior high school. The protective cover comprises a bottom cavity, a cover casing, an operating panel and discharging plates, wherein the bottom cavity is of a semi-closed structure provided with an opening in the top end; clamp slots are fixed in the position, close to the top end, of the inner side of the bottom cavity;the bottom end of the cover casing is clamped on the inner sides of the clamp slots; a ventilating opening is formed in the top end of the cover casing; a transparent glass plate is inlaid in one sideof the bottom cavity; a support frame is fixed on the bottom surface of the inner side of the bottom cavity; the operating panel is fixed on the support frame and comprises an outer ring plate and amesh plate, a center hole is formed in the center of the outer ring plate, and the outer ring plate is fixed on the support frame. The clamp slots are fixed in the position, close to the top end, of the inner side of the bottom cavity, the cover casing provided with the ventilating opening is clamped on the inner sides of the clamp slots in the bottom cavity, so that ventilation performance of theprotective cover is improved, improvement of the ventilation performance of the protective cover for the chemical experiments in the senior high school is facilitated, and the protective cover is convenient to popularize and use.

The invention discloses a bioexperiment induction type culture dish. The bioexperiment induction type culture dish comprises a culture dish body, a dish lid, a base body, an isolation dish, a filtering membrane, a weighing device and a temperature sensor, the culture dish body is of a hollow cylindrical structure of which the upper end is opened, the dish lid and the base body are arranged at the upper end and the lower end of the culture dish body respectively, the isolation dish is arranged in the middle of the bottom of the culture dish body, the filtering membrane is arranged in the isolation dish, and the weighing device and the temperature sensor are arranged on the base body separately. An electric heating plate is arranged at the bottom of the culture dish, and a vacuum extraction pump is arranged at one side of the lower portion of the culture dish. Through the mode, the bioexperiment induction type culture dish has the functions of conducting weighing and sensing the temperature, the sealability is good, and it is guaranteed that internal liquid is not contaminated; meanwhile, through the arrangement of the filtering membrane, germs can be prevented from entering the isolation dish to some degree, the probability that the culture dish is contaminated is lowered, the precision of test data is ensured, and the culture dish is beneficial for smooth proceeding of experiments.

The invention provides a special thin plate clamping device for manufacturing metal material indentations. The special thin plate clamping device comprises an upper pressing plate, a base and a butterfly nut, the upper pressing plate comprises a concave platform, a circular hollow portion is arranged at the middle of the concave platform, and two circular holes are formed in both sides of the upper pressing plate for fixing the butterfly nut; and the base is a thin plate, which is provided with two double-screw bolts on the both sides for fixing the butterfly nut. By screwing the butterfly nut, the upper pressing plate drops, an equipment pressing head passes through the circular hollow portion at the center of the concave table of the upper pressing plate to test a thin plate workpiece. The thin plate clamping device provided by the invention can fix the thin plate workpiece that has insufficient flatness and is not machined in advance, so that the thin plate workpiece does not generate unnecessary movement in the test, thereby improving the accuracy of an experimental result. The thin plate clamping device provided by the invention has the advantages of simple structure and convenient use, and can match with indentation manufacturing equipment to perform mechanical experimental measurement on the thin plate workpiece.

The invention discloses a detecting device for detecting the sealing property of bearing sealing elements. The detecting device comprises a detecting seat, the detecting seat is internally provided with a detecting cavity, a rotating main shaft penetrates into the detecting cavity, the rotating main shaft is rotationally installed on the detecting seat, the rotating main shaft is connected with apower mechanism for driving the rotating main shaft to rotate, a fixing sleeve is further fixed in the detecting cavity, the fixing sleeve is arranged on the rotating main shaft in a sleeving manner,and a mounting cavity is formed between the fixing sleeve and the rotating main shaft. A test assembly includes a test bearing and two test sealing elements, the two test sealing elements are arrangedon the two sides of the test bearing, an air pressure detector is arranged outside the detecting seat, an air pressure detecting probe of the air pressure detector is inserted into the test sealing elements, the detecting seat is connected with a medium supply device, and the detecting cavity is further provided with a medium outlet. The sealing performance of the bearing sealing elements under various environments can be tested, operation is simple, the detection efficiency is high, and noise is small.

The invention provides a volumetric flask fixture, comprising a main base and an anti-floating support mounted on the main base; the main base includes a bottom base and a connection rod vertically fixed onto the bottom base; the anti-floating support includes a first vertical rod vertically connected to the connection rod, a transverse rod horizontally arranged and having one end connected to theupper end of the first vertical rod, a second vertical rod having the upper end connected with the other end of the transverse rod, and an anti-floating member arranged at the lower end of the secondvertical rod; the anti-floating member is provided with an opening allowing a bottleneck of the volumetric flask to pass through; the anti-floating member applies, along the edge of the opening, a downward pressure to the belly of the volumetric flask in order to prevent the volumetric flask from floating on a liquid; when the volumetric flask is immersed in the liquid to carry out ultrasonic washing, the anti-floating member can overcome floating force that the volumetric flask bears and enable the volumetric flask to be constantly immersed in the liquid, thereby avoiding floating; ultrasonic washing effect is guaranteed, and therefore, smooth progress of an experiment and accuracy of test data are guaranteed.

The invention discloses a small-size high-speed dispersion machine for a laboratory. The small-size high-speed dispersion machine comprises a base and a support rod, wherein the support rod is fixed on the base; a lifting frame capable of moving up and down is arranged on the support rod; a stirrer is fixedly connected with the end part of the lifting frame; the dispersion machine further comprises a fixer for fixing a material drum; the fixer is connected with the support rod; a material drum mounting position corresponding to the stirrer is formed on the end part of the fixer. The small-sizehigh-speed dispersion machine has high safety, is capable of effectively preventing accident from happening and is suitable for dispersion and mixing of the materials in the liquid. The small-size high-speed dispersion machine has the advantages of simple structure, high dispersion efficiency, excellent mixing effect, low manufacturing cost and convenience in popularization.

The invention relates to an experimental apparatus for researching influence of non-biological factors to armadillium vulgare. The experimental apparatus comprises two same cylindrical experimental platforms and at least three experimental platform covers, and further comprises temperature sensors, humidity sensors and a carbon film resistor, wherein the upper ends of the experimental platforms are opened; openings of same size are formed in the parts, which are in correspondence, of the side faces of the two experimental platforms; the two openings are connected via a channel that the upper end is opened; a channel cap is arranged at the upper end of the channel; a medium-density sponge is arranged on the bottom surface of the interior of each experimental platform; at least one of the atleast three experimental platform covers are different from the other two ones in color; rotary doors are fixedly connected to the lower ends of the experimental platform covers; the rotary doors arelarger than the openings and can completely fit to the openings, so that the openings can be covered or completely opened by rotating the experimental platform covers; and the temperature sensors, the humidity sensors and the carbon film resistor are inserted into the experimental platforms. With the application of the technical solution on learning knowledge of students of junior and senior highschools or within an acceptable range of knowledge capability of the students of junior and senior high schools, operability and interesting of the students in biology experiments can be improved.

The invention provides a Caco-2 cell monolayer membrane forming culture method. The method comprises the following steps: culturing Caco-2 cells by using an MEM culture medium containing 20% of fetalcalf serum and 1% of penicillin/streptomycin, when the cell convergence degree reaches 60-70%, performing pancreatin digestion, carrying out continuous subculture for 2-3 times, and after the cells are cultured to the logarithmic phase, carrying out excessive inoculation cell culture and cell adherent expansion, cleaning non-adherent cells with PBS to obtain Caco-2 monolayer membrane cells. A Caco-2 monolayer membrane model established by the method is good in state, and is arranged in a paving stone inlay shape, the cells are tightly connected, cavitation is basically not formed, the Caco-2 cell model is reliable and stable, the repeatability is good, and an experimental foundation is laid for subsequent drug absorption and transfer research.