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184results about How to "Avoid dipping" patented technology

Medical composite dressing for wound repair and preparation method thereof

The invention discloses a medical composite dressing for wound repair. The dressing comprises an inner layer which is in contact with a wound, a middle layer and an outer layer. The dressing is characterized in that: the inner layer is a chitosan / polyvinyl alcohol / oxidized sodium alginate blended nano-fiber antibacterial layer; the middle layer is an aerogel moisture absorption layer prepared by subjecting a sodium alginate / polyvinyl alcohol / sodium carboxymethyl cellulose nanofiber membrane to shearing and freeze-drying treatment; and the outer layer is a non-woven fabric breathable layer, andthe inner layer, the middle layer and the outer layer are compounded through medical glue. According to the composite dressing, the mechanical property of the dressing is improved by utilizing an electrostatic spinning technology. Meanwhile, the nanofiber membrane prepared according to the electrostatic spinning technology and the nanofiber membrane aerogel obtained through aftertreatment have high porosity and large surface area, the excellent breathability can be achieved while the high moisture absorption and moisture retention performance is guaranteed, exudate diffusion is reduced, the skin is kept clean, and the dressing can be widely applied to recovery treatment of various wounds.
Owner:DONGHUA UNIV

Method for cultivating teak seedling

The invention discloses a method for cultivating a teak seedling. Grafting comprises the following steps: (1), cutting wood collection: selecting a lateral branch with the diameter of 3-5 cm and the length of 5-7 cm and close to one end of a main branch on a stock plant in mid April of next year, taking the lateral branch as a cutting wood, cutting the base of the cutting wood to form a bulge of which the exterior is cylindrical, wherein the internal diameter of the bulge is gradually reduced from the lower end to the upper end of the base of the cutting wood so as to form an internal space in a circular truncated cone shape; (2), stock processing: selecting an excellent root segment of a lobular red sandalwood tree as a stock with the length of 8-10 cm, wherein a notch is a groove which contains the bulge and is matched with the bulge; (3), cottage grafting: coating sticky liquid in the groove of the stock, inserting the bulge of the cutting wood into the groove of the stock, coating the sticky liquid on the connection part, winding to cover the connection part from bottom to top by utilizing a plastic film, binding tightly and ensuring the sealing. According to the method for cultivating the teak seedling, the root segment of the lobular red sandalwood tree is taken as the stock to graft and cultivate the teak seedling, so that the teak seedling with high root growth vigor and high survival rate can be obtained.
Owner:龚卫新

Device for testing water seepage of building wall for building supervisor

The invention discloses a building wall seepage testing device for construction supervision, which comprises a bottom plate, the top of the bottom plate is provided with a baffle plate, a water tank and a base in turn from left to right, and one side of the top wall of the inner cavity of the water tank is fixedly connected with a filter box. The left side of the top of the water tank is connected to the water supply pipe. The top right side of the water tank is provided with a water pump. There are guide rails, and a lifting box matching the guide rails is set on the lead screw. The top of the lifting frame is fixedly connected to the water receiving tray, and the inner cavity of the water receiving tray is fixedly connected to the second electric telescopic device through the support rod. The second electric telescopic device The second telescopic rod is fixedly connected to the second water spray device, and the bottom end of the bottom plate is evenly provided with several universal wheels; the water spray cover and the water receiving tray provided by the present invention have a backflow function, and can recover the sprayed water flow, and the backflow water passes through It can be reused after filtration to reduce water consumption during the detection process.
Owner:吴步晨

Folding type transversely-moving electric stair climbing wheelchair

The invention relates to a folding type transversely-moving electric stair climbing wheelchair. The folding type transversely-moving electric stair climbing wheelchair comprises stair climbing control handles, a seat frame, a backrest frame, armrests, a pedal, a stair climbing motor, front legs and rear legs, and is characterized in that walking push handles are arranged on the backrest frame; the stair climbing control handles are arranged at the front end of the seat frame; the rear legs can rise and fall; front stair climbing wheels, rear stair climbing wheels and antiskid positioning legs are arranged at the bottom of the seat frame; stair climbing legs are arranged on the two sides of the seat frame and are each composed of a horizontal rod, a fixed vertical leg and a length-adjustable vertical leg; a main shaft and an auxiliary shaft are arranged on the seat frame, the main shaft is connected with the stair climbing motor, the two ends of the main shaft are connected with one end of a main shaft crank, the two ends of the auxiliary shaft are connected with one end of an auxiliary shaft crank, the other end of the main shaft crank is connected with a horizontal rod, and the other end of the auxiliary shaft crank is connected with the horizontal rod; in the unfolded state, the backrest frame leans backwards in a flat and straight mode, the stair climbing control handles lean upwards towards the front, a headrest is arranged on the upper portion of the backrest frame, and the armrests and the pedal are horizontally arranged; in the folded state, the headrest is detached, the backrest frame is turned backwards to be vertical, the stair climbing control handles are turned backwards to be horizontal, the armrests are turned backwards to be in the same plane as the backrest frame, and the pedal is turned backwards to be vertical.
Owner:王宝金
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