Spring is warm and flowers are blooming, all things are recovering, and at this time, it is time for animals to breed again. In the animal husbandry industry, preparations for animal reproduction have begun. Among them, \"semen\" is inseparable, which requires not only quality ...
Currently, the technology of using liquid nitrogen to freeze animal semen for artificial insemination has been widely used in livestock production. Because the temperature of liquid nitrogen is -196°C, and its boiling point is low, it is easy to volatilize and is difficult to ...