2results about How to "Evenly seeded" patented technology

The application discloses a microfluidic chip for preparing high-flux tumor organoids and a preparation method and application thereof. The microfluidic chip comprises a top layer and a matched bottom layer connected with the top layer; the top layer contains four hollow areas in the shape of right-angle sectors, and forms liquid storage areas after being connected with the bottom layer; four cell culture areas and four liquid exchange buffer areas are arranged in the areas of the bottom layer corresponding to the hollow areas of the top layer, and one cell culture area and one liquid exchange buffer area form a right-angle sector; the cell culture area is provided with a plurality of small chambers; and the liquid exchange buffer area is connected with the center. The microfluidic chip is provided with the liquid exchange buffer area, which greatly reduces the growth interference and loss of cells during liquid exchange, thereby being beneficial to the formation of uniform tumor organoids and keeping the tumor organoids in situ, facilitating continuous observation; and the top-open structure design is adopted, which is convenient for uniform implantation and dispersion of tumor cells and convenient for recovery of the tumor organoids.

The utility model relates to ecological restoration device technical field especially, more particularly to a kind of adjustable seed reseeding device of grassland ecological restoration.The utility model provides a kind of adjustable seed reseeding device of grassland ecological restoration, including support frame, non-slip wheel, motor, fixed block and fixed column, multiple non-slip wheels are rotatably connected in the rectangular array in support frame bottom, motor is fixedly connected in support frame right side, fixed block is fixedly connected in support frame left side, the output shaft end of fixed block and motor is rotatably connected, fixed column is fixedly connected in support frame left side.The utility model is through the clamping cooperation structure of limiting rod and fixed block, is combined with guide rod and knob locking mechanism, so that seed box can be conveniently installed on motor output shaft, and its position can be adjusted by knob, to realize the flexible adjustment of sowing row distance, improve the stability and operation convenience of overall structure, reduce manual intervention and operating cost.