42results about How to "Reduce experimental risk" patented technology

The invention relates to a surveymeter for parallelism of optical axis of visible and infrared light wave, comprising an infrared light part and a visible light part. Firstly, aiming is operated by employing visible light, the visible light emitted by a visible light source lightens up a cross wire by a cross-linegraticule, an emergent visible cross wire image is formed on a visible light CCD, after being reflexed by an infrared beam splitter, a secondary mirror, a primary mirror and a standard flat mirror, the emergent visible light returns to the visible light CCD by the optical devices and forms a return cross wire image, and a system is adjusted to superpose the emergent visible cross wire image and the return cross wire image, thereby completing instrument aiming. Then infrared light is employed for detecting, iraser emitted by an infrared laser passes through a series of optical elements of the infrared light part, and an emergent infrared spot and a return infrared spot on an infrared CCD are extracted by measurement software. Error value of the parallelism can be obtained by formula computing. The surveymeter of the invention adopts the visible light to aim and the infrared light to detect the parallelism error, thereby reducing experiment risk while improving measurement precision.

This invention provides one handle virtual experiment chamber system, which comprises signal control process unit and signal control process unit connected input unit, memory unit and display unit to receive user input and operation orders, wherein, the signal control process unit further comprises central processor unit and one virtual experiment platform module for ratification operation. This invention provides one handle virtual experiment chamber realizing method.

The invention discloses a ground experiment system for verifying of vision guidance landing algorithm of a flight vehicle. The ground experiment system includes a motion drive platform and a main shaft arranged on the motion drive platform, wherein a battery and electronic equipment are arranged on the motion drive platform; a trace and course motion drive assembly is arranged at the lower end of the motion drive platform; a camera is arranged on the main shaft; a tilt-rotating platform is sleeved on the main shaft; the tilt-rotating and the main shaft are connected through a global hinge; and an attitude motion drive assembly is arranged at the lower end of the tilt-rotating platform. The ground experiment system utilizes the ground experiment equipment to simulate the flying attitude and trace variation of the flight vehicle in the air, so as to verify the vision guidance landing algorithm of the flight vehicle.

The invention provides a kit using single cell gel electrophoresis for detecting cell DNA damage and a method. The method includes gel laying, splitting, unwinding, electrophoresis, neutralizing and washing, drying and dyeing, a fluorescence microscope is used for observing a dyeing result and taking photos, and the damage degree of cell DNA is analyzed and evaluated. As three layers of gel need to be laid on a glass slide during sample preparation, a traditional single cell gel electrophoresis technology has the disadvantages of being complex in operation and prone to degumming, and sample images are unclear; while only one layer of gel needs to be laid on a glass slide, the kit has the advantages of being simple in sample preparing process, low in degumming rate, easy to operate, low in experiment cost and the like.

The invention provides a sulfur-doped graphite-like carbon nitride nanosheet loaded graphene and ferroferric oxide composite magnetic photocatalyst. A sulfur-doped graphite-like carbon nitride nanosheet is taken as a carrier, and graphene and ferroferric oxide particles are modified on the sulfur-doped graphite-like carbon nitride nanosheet. The preparation method comprises the following steps: preparing sulfur-doped graphite-like carbon nitride nanosheets by using thiourea through high-temperature pyrolysis, preparing a sulfur-doped graphite-like carbon nitride loaded graphene composite material by using an impregnation method, and preparing the sulfur-doped graphite-like carbon nitride loaded graphene and ferroferric oxide composite photocatalyst material by using an alkaline-thermal coprecipitation method. The composite magnetic photocatalyst has the advantages of high photocatalytic activity, good stability, magnetic force and easy recovery, and the preparation process has the advantages of simple operation, low cost and good safety. The composite magnetic photocatalyst can be used for treating wastewater containing various antibiotics and is good in stability and practicability, high in efficiency, easy and convenient to operate, low in cost and high in recycling value.

The invention discloses an experiment table for testing a hydraulic servo system. The experiment table comprises a base, a first differential hydraulic cylinder driving unit, a second differential hydraulic cylinder driving unit, a third support lug, a fourth support lug, a sliding table and a supporting rod, wherein the first differential hydraulic cylinder driving unit and the second differential hydraulic cylinder driving unit are symmetrically fixed on the base along the longitudinal direction; the third support lug and the fourth support lug are used for fixing the first differential hydraulic cylinder driving unit and the second differential hydraulic cylinder driving unit on the base respectively; the sliding table is positioned between the first differential hydraulic cylinder driving unit and the second differential hydraulic cylinder driving unit; the sliding table is connected with the first differential hydraulic cylinder driving unit and the second differential hydraulic cylinder driving unit respectively through a first connecting block and a second connecting block; the supporting rod penetrates the side central position of the sliding table along the transverse direction; and loads are arranged on the supporting rod and on the two sides of the sliding table. When the experiment table is used for performing hydraulic pressure servo control experiment research and hydraulic system position servo control research, an experiment on an actual heavy-load big-inertia equipment mechanical system can be moved to a lab, so that the experiment cost and risk can be largely reduced.

The invention belongs to the field of preparation of porous materials, and mainly relates to preparation of solvent-free hydrothermal preparation method of a carbon material, which comprises the following steps: mixing tannic acid, vanillin and nano calcium carbonate, dropwise adding a small amount of dilute sulfuric acid, and grinding until the surface is wet; putting the ground sample into a vacuum drying oven for reaction; carbonizing the carbon material precursor in a nitrogen atmosphere, grinding and crushing the precursor, treating the precursor with diluted hydrochloric acid, drying theprecursor, treating with distilled water, and drying the precursor to obtain the carbon material prepared by the solvent-free hydrothermal method. According to the method, solid-solid mixing is carried out for hydrothermal reaction, wherein no solvent is added when the hydrothermal reaction is used for preparing the carbon material, and experiment risks are reduced, and a carbon material precursor is directly obtained after the experimental reaction. The prepared carbon material has good specific surface area and uniform pore size distribution, and can be further used for loading other metalmaterials.

The invention discloses a preparation method of an ambroxol hydrochloride impurity reference substance. The method comprises the following steps: firstly, dissolving ambroxol hydrochloride in an appropriate amount of dichloromethane solution, then adding a quantitative aqueous solution of sodium hydrogencarbonate for uniform stirring to obtain free ambroxol, separating, drying and concentrating the organic phase, dissolving the concentrated solution in the alcohol solution, then refluxing with excess orthoformate to obtain a crude product of (1R, 4R)-4-(6,8-dibromo-3,4-dihydroquinazoline)-cyclohexanol after condensation, and obtaining a pure product after the crude product is purified by silica gel column chromatography. The invention has the creative application of orthoformate as a condensing agent. Compared with other condensing agents reported in the literature, the orthoformate has the advantages such as good stability, high safety, low cost, high product yield and easy purification.

The invention provides a test tube pick-and-place device, which includes an operating ring, a transverse rod, a moving rod, and a clamping ring; the operating ring is a vertically arranged cylindrical ring, and a fixed ring is arranged on the bottom edge of the horizontal rod; Horizontally arranged above the fixed ring; the moving rod passes through the fixed ring from the vertical direction; the clamping ring is an arc-shaped ring with an angle less than 180°, and the two clamping rings are arranged horizontally opposite and connected by the end of the elastic structure A pull ring is provided at the arc top of the clamping ring; the top end of the moving rod is movably set in the ring at the end of the transverse rod, and the bottom end is movably set in the pull ring. The invention realizes the non-manual operation of individual pick-and-place tubes in a sterile environment through a purely mechanical, low-cost, and easy-to-maintain method, and is stable and reliable, can effectively reduce experimental risks and solve disinfection and sterilization resources, has a simple structure, and is easy to maintain. The batch strain experiment of small and medium-sized enterprises provides a reliable guarantee.

The invention discloses a method for preparing regular petal-shaped WO3/Fe2O3, and relates to a method for preparing WO3/Fe2O3, which comprises the following steps: by taking hydrazine hydrate, methylbenzene, ferric acetylacetonate, oleic acid and sodium tungstate as main raw materials, adding an acidic solution to adjust the pH value, putting into a reaction kettle at 130 DEG C, taking out the solution after 24 hours, cooling at room temperature, adding ethanol into the obtained product Fe3O4, carrying out ultrasonic treatment, cleaning with ethanol under the help of a magnet, and drying to obtain the regular petal-shaped WO3/Fe2O3. And storing in ethanol for later use. Taking 5 mmol of sodium tungstate, putting the sodium tungstate into a reaction kettle lining, stirring and dissolving, adjusting the pH value to be about 4.5 by using an acid solution, adding Fe3O4 soaked in ethanol, reacting at 160 DEG C for 96 hours, taking out the solution, cooling at room temperature, centrifugally cleaning the obtained product by using deionized water, putting into a drying oven for vacuum drying at 65 DEG C, and grinding the treated solid in an agate mortar to obtain the final product WO3/Fe2O3. The WO3/Fe2O3 prepared by the invention has the characteristics of small size, uniform morphology, high yield, low cost, simple synthesis process, environmental friendliness, no toxicity, excellent chemical stability, magnetism and the like, and has wide application prospects.

The invention discloses a detachable burette convenient for internal cleaning, and relates to the technical field of titration equipment. The detachable burette comprises a fixing mechanism; the uppersurface of a first fixing ring is rotationally connected with a first threaded rod; a moving block is in threaded connection with the peripheral side surface of the first threaded rod; one side of the moving block is fixedly connected with a capacity scale; a liquid storage mechanism is in clearance fit with the inner wall of the first fixing ring; an internal thread groove is fixedly connected to the inner wall of a first liquid storage pipe close to the top end; and the upper surface of a hollow circular truncated cone is fixedly connected with a second liquid storage pipe. Through the design of the first liquid storage pipe, the control valve, the second liquid storage pipe, the third liquid storage pipe and the fixing mechanism, the burette can be rapidly disassembled and assembled, the interior of the burette is convenient to clean, the burette cleaning efficiency is greatly improved, meanwhile, through the arrangement of the control valve, a titration reagent can be convenientlyadded into the burette, the phenomenon that a reagent bottle is directly held by a hand to cause flow backward is reduced, and reagent leakage is effectively avoided.

The invention provides a device and a method for toxicological research of plant roots. The device comprises a toxicological test chamber and a culture chamber which are detachably connected, wherein the culture chamber is arranged above the toxicological test chamber for toxicological test, the toxicological test chamber comprises a body, at least two butted first partition plates are arranged in the body, the body is divided into at least two cavities by the first partition plates, a sample cavity is reserved at the butted part of the butted first partition plates, and the sample cavity is used for accommodating a plant root. The device has characteristics of simplicity, rapidness, convenience and safety, is not only suitable for research of single factor influence, but also can be used for research of multi-element combination effect, reduces experimental consumables, reduces experimental risks, and improves experimental efficiency.

The invention provides a laboratory detection data processing method and system. The method comprises the steps: enabling a user to send a detection data acquisition request; receiving the detection data acquisition request through experimental equipment, generating a detection instruction, performing data detection of a target experiment, and obtaining to-be-processed experimental data; obtaining to-be-processed experiment data obtained based on a target experiment in a laboratory through an acquisition module; preprocessing the obtained to-be-processed experimental data through a processing module to obtain to-be-detected experimental data; verifying the to-be-detected experimental data through a verification module, and if the to-be-detected experimental data passes the verification, generating a detection result; and providing the detection result to the user through a prompt module. According to the invention, intelligent remote control of the laboratory can be realized, unnecessary human resource waste is avoided, and the experiment risk of experimenters can be effectively reduced.