6results about How to "Improve experiment safety" patented technology

The utility model provides an operation smoke collecting device under a simulated operation microenvironment, which comprises a box body, a lifting support arranged on the box body, a group of rotor flow meters arranged on the lifting support, a group of detection pipeline components arranged on the box body in a penetrating manner, one end of each detection pipeline component is communicated with the corresponding rotor flow meter, and the other end of each detection pipeline component is positioned in the box body. And the box body is also provided with an air inlet hole and an electrotome wire inlet hole. The smoke collection micro experimental environment under the simulated surgical operation is provided, the functions are convenient and fast to use, the production efficiency is improved, the environmental pollution is reduced, and the experimental safety is improved. The particulate matter monitoring module and the compound collecting module provided by the device can effectively meet the detection requirement of the operation smoke in the microenvironment.

The invention discloses a thyroid nodule puncture sample DNA and RNA extraction method and a kit, and relates to the technical field of biology. The kit comprises a lysis solution and a nucleic acid protective agent, the lysate is prepared from guanidine hydrochloride, guanidine isothiocyanate, sodium citrate, lauryl sodium sulfate, ethylenediamine tetraacetic acid, Nonet P-40, polyvinylpyrrolidone, Triton X-100 and tris (hydroxymethyl) aminomethane; the nucleic acid protective agent is composed of dithiothreitol and tris (2-carboxyethyl) phosphine. According to the kit provided by the invention, the extraction efficiency is improved, and the flexibility of sample treatment is improved by optimizing the components of the lysis solution, increasing the lysis efficiency of different tissue quantities, jointly using the nucleic acid protective agent and inhibiting the nuclease activity in a sample, so that the individual detection requirements of more patients can be met. Through the application of the nucleic acid protective agent, the operation steps are simplified, and the safety is enhanced.

The present application relates to the field of oil and gas drilling development, in particular to a kind of high temperature and high pressure wellbore multiphase flow visualization device and method based on MIT imaging.The technical scheme is: including temperature and pressure monitoring unit, data processing and three-dimensional imaging unit, also including wellbore simulation unit and MIT magnetic induction imaging unit, MIT magnetic induction imaging unit is installed on wellbore simulation unit;Silicon carbide wellbore is filled with three-phase experimental fluid, for adapting the simulation needs of different well diameters, and silicon carbide wellbore is installed in the center of first center variable-diameter mechanism, second center variable-diameter mechanism and third center variable-diameter mechanism;Composite heat insulation layer is arranged outside silicon carbide wellbore, and the beneficial effect is: the present application can adapt to high temperature and high pressure working condition, magnetic signal has strong anti-interference ability, the monitoring of three-phase experimental fluid is realized by the combination of the rapid adjustment of center variable-diameter mechanism and magnetic induction fault imaging technology, and it has high imaging resolution, which is of great significance to promote the progress of deep oil and gas drilling development technology.

The application discloses a cyanobacterial nanogene carrier and a preparation method thereof. By irradiating cyanobacteria under appropriate wavelength light, toxic active oxygen is generated in the cyanobacteria, lysosomes are destroyed, and the gene carrier trapped in the lysosomes is released into the cytoplasm, so that the biological function of the gene can be better exerted, and the problems of the gene carrier in the prior art, such as cationic lipids, cationic polymers, difficult lysosome escape and low gene transfection efficiency, are overcome. Meanwhile, the preparation process is complex, other substances are easily introduced, and the safety is low, and the like are overcome, so that the application is more suitable for efficient delivery of the gene carrier, an effective treatment method is provided for treatment of tumors and the like, and the treatment of cancer and the like is beneficial.

The utility model discloses an internal circulation pipe-free ventilation cabinet, and relates to the technical field of ventilation cabinets. Comprising a ventilation cabinet main body, the ventilation cabinet main body is provided with an installation mechanism used for ventilation work, a fan is used for sucking in external gas, then the external gas is filtered and discharged, and the direction is controlled through a guide plate when the gas is discharged; then a gear rod slides on the inner wall of a limiting plate through pushing of a connecting block and an electric push rod, the gear rod drives a transmission gear to rotate, and a supporting shaft on the transmission gear rotates, so that the angle of a guide plate on the outer wall of the supporting shaft is adjusted, the gas exhaust direction is controlled, and the gas exhaust direction can be accurately controlled; the gas is prevented from being directly blown to experimenters or sensitive equipment, the experiment safety is improved, the angle of the guide plate is flexibly adjusted, the gas exhaust direction can be dynamically adjusted according to experiment requirements or environmental conditions, and the applicability of the equipment is improved.

This invention belongs to the fields of mechanical automation and machine vision recognition technology. It discloses a stability heating test system and method for automated test tube extraction and boundary recognition. The system includes a mechanical motion and gripping unit, a heating and temperature control unit, a machine vision recognition unit, and a central control unit. It enables automatic placement and retrieval of test tubes between the placement and heating positions, precise control of the test temperature and over-temperature protection, and automatic recognition of the endpoint of test paper color change based on machine vision. The method achieves intelligent determination and alarm of the color change endpoint through image acquisition and processing, multi-test tube positioning, test paper area extraction, and color similarity analysis based on HSV color space and Mahalanobis distance. This invention solves the problems of low efficiency, large subjective error, and high safety risks in traditional manual operation, realizing full automation, digitalization, and unmanned operation of the stability heating test process, and improving the accuracy and repeatability of test results.