Abstract: Provided is a method for bedding precise pressurized water injection based on coal seam interval hydraulic gradient calculation, including: setting pressure measurement boreholes on both sides of a water injection borehole with the water injection borehole as the center, and installing monitoring devices to measure internal stress of the pressure measurement boreholes in real time; during the coal seam water injection process, real-time pressure changes are obtained to determine the along-the-path dynamic damage of the pressurized water; according to the pressure difference changes within different water injection radius ranges and the pressure change nodes of the pressure measurement boreholes, during a water injection process in the same coal seam, the coal seam water injection pressure should be increased in a timely manner at the corresponding time nodes. The method of the present disclosure can effectively avoid the phenomenon of water flooding caused by excessive initial pressure during water injection.

Abstract: The present invention relates to the discovery that an epididymis-specific defensin, EP2D, plays an important role in regulating sperm motility and therefore male fertility. Provided are methods for evaluating male fertility based on the level of EP2D bound to sperm, kits for evaluating male fertility, and methods for enhancing or suppressing fertility in a male by regulating the level of EP2D and the binding between sperm and EP2D.

Abstract: The present invention relates to the discovery that an epididymis-specific defensin, EP2D, plays an important role in regulating sperm motility and therefore male fertility. Provided are methods for evaluating male fertility based on the level of EP2D bound to sperm, kits for evaluating male fertility, and methods for enhancing or suppressing fertility in a male by regulating the level of EP2D and the binding between sperm and EP2D.