7results about How to "Meet different experimental needs" patented technology

The utility model discloses a centrifugal tube placing rack for water bath inactivation plasma, including the frame main body of integral cuboid, the frame main body includes bottom plate, top plate and four stand, four stand rectangular distribution between bottom plate and top plate, and the both ends of stand are fixedly connected with bottom plate and top plate respectively, the upper surface of bottom plate is equipped with a plurality of positioning recess for positioning the bottom part of centrifugal tube, and the elastic clamping plate of horizontal distribution is movably arranged between bottom plate and top plate, and the elastic clamping plate is provided with the limiting through -hole corresponding with each positioning recess, the adjacent two stand form the guide sliding slot along the vertical distribution, and the edge of elastic clamping plate is respectively with four stand side surface elastic abutment and elastic clamping plate and guide sliding slot sliding connection. The utility model improves the safety, adaptability of centrifugal tube placement in the process of plasma inactivation, can guarantee that plasma is heated evenly, has improved inactivation effect and efficiency.

The utility model relates to the technical field of physical experiment teaching aids, in particular to a simple harmonic motion experiment instrument, which comprises a base, a liquid spraying device, a support arranged on the base and a paper feeding device arranged on the base, the support comprises a cross rod, a first vertical rod and a second vertical rod, the first vertical rod and the second vertical rod are arranged on two opposite sides of the cross rod, and the cross rod is provided with a cycloid and connected with a pendulum ball. A gap exists between the lowest point of the swing ball in the natural state and the base, a spring is fixed to the first vertical rod and is horizontally placed in the natural state, one end of the spring is detachably connected with the swing ball, the liquid spraying device comprises a spraying pipe, and the liquid outlet end of the spraying pipe is fixedly connected with the swing ball; a spring oscillator experiment and a simple pendulum experiment are integrated on one device, so that students can conveniently compare two simple harmonic motion phenomena on the same platform, the essence and generality of the simple harmonic motion can be deeply understood, and the teaching effect is optimized. Meanwhile, through the detachable connection design, quick switching between a spring oscillator experiment and a simple pendulum experiment is facilitated, and different experiment requirements are met.

The utility model discloses a simple positioner for positioning yeast two-hybrid colonies, which relates to the technical field of molecular biology experimental equipment and comprises a high-pressure plastic ring, a clamping groove is arranged on the inner side of the high-pressure plastic ring, and elastic clamping components are arranged on two sides of the high-pressure plastic ring. The elastic clamping assembly comprises elastic plastic sheets fixedly arranged on the two sides of the high-pressure plastic ring. A marking card is clamped in the clamping groove of the high-pressure plastic ring; clamping grooves formed in the inner sides of the high-pressure plastic rings are used for fixing marking cards, and clamping assemblies composed of elastic plastic sheets are arranged on the two sides of the high-pressure plastic rings to fix culture dishes of different specifications; the positioner solves the problems of low precision and error proneness of a traditional bacterial colony positioning method through standardized coordinate marking, and has the advantages of simple structure, convenience in operation, low cost and the like. The experimental process is more flexible and efficient due to the lightweight design and the replaceable mark card system, and the system is particularly suitable for bacterial colony positioning work in a high-throughput yeast two-hybrid screening system.

This invention proposes a large-scale array acoustic tweezers control device and method, relating to the field of ultrasonic technology. It includes: a host computer and an ultrasonic control system; the host computer is communicatively connected to the ultrasonic control system for sending control data to the ultrasonic control system; the ultrasonic control system includes: an interactive circuit board, a control circuit board, and ultrasonic transducers; the ultrasonic transducers are arranged in multiple ultrasonic transducer arrays, forming a control space; the interactive circuit board distributes control data to the ultrasonic control board, which controls the ultrasonic transducers to emit ultrasonic waves, synthesizing a preset sound field within the control space to control the position of the target object, achieving precise control of the ultrasonic transducers, capturing and manipulating the target object, with high synchronization accuracy between signal channels, a large number of controlled transducer array elements, and support for adjusting the frequency, phase, and amplitude of the driving waveform of a single array element. The array can be arranged into a planar array or other shapes to meet different experimental needs.

This invention discloses a rapid molding machine for gypsum board templates, comprising a base box, a fixed cylinder vertically fixedly connected to the top of the base box, a base plate disposed above the base box, a guide rod fixedly connected to the bottom of the base plate, the bottom end of the guide rod extending into the fixed cylinder and movably connected to the fixed cylinder, a bottom mold disposed on the top of the base plate, a top mold disposed above the bottom mold, a fixed column vertically fixedly connected to one side of the top of the base box, a fixed sleeve rotatably connected to the top of the fixed column, a fixed seat horizontally fixedly connected to one side of the fixed sleeve, a pressure device vertically disposed on one side of the bottom of the fixed seat, a vibration device disposed on the bottom of the base plate, and thickness adjustment devices disposed on both sides of the top of the top mold. This invention relates to the field of gypsum board processing technology. This rapid molding machine for gypsum board templates is easy to operate, facilitates control of the thickness of gypsum board templates, and reduces internal pores.

The utility model discloses a biosafety experiment cabinet capable of switching a hand operation position. A biosafety experiment cabinet capable of switching hand operation positions comprises a biosafety cabinet main body, the biosafety cabinet main body comprises a cabinet body and a transparent partition plate which is slidably arranged at the front part of the cabinet body, the biosafety experiment cabinet is characterized in that two operation ports which are arranged left and right are formed in the transparent partition plate, and a mounting flange plate is fixed on the outer side of each operation port; the mounting flange plate is detachably connected with a transparent window or a glove operation window; the glove operation window comprises a glove and a glove fixing flange plate used for fixing a glove opening of the glove, and the glove fixing flange plate is detachably connected with the mounting flange plate; when the mounting flange plate is connected with the transparent window, a gap area between the operation table and the transparent partition plate is a first hand operation space; and when the mounting flange plate is connected with the glove operation window, the glove operation window is a second hand operation space. According to the utility model, the space for hand experiment operation is reserved under the condition of different opening degrees of the transparent partition plate.

The utility model discloses a simple microbial fertilizer granulating device, which relates to the field of granulating devices and comprises a base. The granulating device comprises a base, a granulating cylinder, a fixed cylinder, a rotary granulating mechanism, a spraying mechanism and a filtering mechanism, the granulating cylinder is fixedly connected to the top end of the base, the fixed cylinder is fixedly connected to the top end of the inner wall of the granulating cylinder, the rotary granulating mechanism is arranged in the fixed cylinder, the spraying mechanism is arranged on the fixed cylinder, and the filtering mechanism is arranged in the granulating cylinder. By means of the arrangement mode that the granulating cylinder, the fixed cylinder, the rotary granulating mechanism, the spraying mechanism and the filtering mechanism are matched, granules uniform in size and moderate in strength can be prepared under the action of the rotary granulating mechanism and the spraying mechanism, different experiment requirements can be met by adjusting parameters such as the rotating speed and the spraying amount, the overall structure is simple, operation is convenient, and the experiment efficiency is high. The device is easy to operate and maintain, suitable for laboratory use, simple in design, capable of reducing manufacturing cost and suitable for laboratory budgeting.