Abstract: The present disclosure relates to the technical field of medicine, in particular to a furan-aspidospermine dimer or a pharmaceutically acceptable salt thereof, and a preparation method, use and a pharmaceutical composition. In the present disclosure, the furan-aspidospermine dimer or a pharmaceutically acceptable salt thereof can activate an immune response by increasing a proportion of T lymphocytes and enhance a function of the immune response.

Abstract: The present disclosure provides an adeno-associated virus having a variant capsid protein, and use thereof. The variant adeno-associated virus AAV-ie refers to insert an amino acid sequence DGTLAVPFK between N589 and R590 of the capsid protein VP1 of the wild-type AAV-DJ. The variant adeno-associated virus AAV-ie can efficiently infect hair cells and supporting cells, which is greatly improved compared with the parents, therefore provides better technical support for scientific research.

Abstract: A waterproof LED underground light contains: a housing, a circuit board, an LED light source, a surface cover, a tempered glass, and a sealing rubber ring. The housing is molded from plastics and is provided with a plate hiding groove, a plate placing position, a sealing groove and a fixed side. The circuit board is configured in the plate hiding groove. The light guide plate is configured in the housing. The LED light source is configured in the side face of the light guide plate. The surface cover is configured above the fixed side. The tempered glass is configured between the surface cover and the housing. The sealing rubber ring is configured between the surface cover and the housing.

Abstract: A waterproof LED underground light comprises a housing; a circuit board configured in a plate hiding groove; a light guide plate configured in the housing; an LED light source configured in the side face of the light guide plate; a surface cover configured above a fixed side; tempered glass configured between the surface cover and the housing; and a sealing rubber ring configured between the surface cover and the housing. The housing is molded from plastics through one processing, thereby effectively preventing the housing from being corroded, and avoiding metal electric shock accidents of the underground light; and the cooperative use of the sealing rubber ring and the sealing groove improves the waterproof grade of the LED underground light. With the LED light source being in match with the light guide plate, the LED underground light has softer light rays.

Abstract: A housing of a fire emergency indicating light, wherein the housing is molded from fireproof plastics through one processing and comprises a rectangle-shaped frame, a reflective plate configured in the frame, and a refractive plate configured in the frame. The production process is simple, the molding time is short, the recycling is easy, and the housing is insulating with no occurrence of electric leakage accidents, moreover, the housing is not easy to deform, thereby more effectively protecting lights; through the design of a reflective plate and a refractive plate, the light rays are more uniform, and the utilization rate of light is higher; when the housing is used in the assembly of a light, the process is simple, and the steps are extremely few, thereby greatly improving production efficiency and lowering product cost, meanwhile, the appearance is more fine and elegant, thereby satisfying more life requirements of people and creating good economic benefits for enterprises.

Abstract: A luminary has a central lamp, an emergency lamp and a control box. The emergency lamp is ring-shaped and mounted around a light-emitting end of the central lamp and has a base and a circuit board. The circuit board has an LED set and a cable set connected to the LED set. The control box is electrically connected to cable set of the circuit board, adapted to connect to an AC power and has a battery. The control box drives the LED set when an outage of the AC power occurs. Since emergency illumination is provided by the emergency lamp and is independent of normal illumination provided by the central lamp, battery power for emergency illumination can be kept from being quickly consumed by the central lamp that is usually power-consuming.

Abstract: A luminary has a central lamp, an emergency lamp and a control box. The emergency lamp is ring-shaped and mounted around a light-emitting end of the central lamp and has a base and a circuit board. The circuit board has an LED set and a cable set connected to the LED set. The control box is electrically connected to cable set of the circuit board, adapted to connect to an AC power and has a battery. The control box drives the LED set when an outage of the AC power occurs. Since emergency illumination is provided by the emergency lamp and is independent of normal illumination provided by the central lamp, battery power for emergency illumination can be kept from being quickly consumed by the central lamp that is usually power-consuming.