| 摘要 |
<p>A method for preparing animal semen freeze-dried powder, which is prepared by freeze-drying fresh semen, comprises the steps of prefreezing, sublimation drying and analysis drying. It has the following advantages that: (1) protein, microorganisms and the like can not denature or lose biological activity; (2) the loss of certain volatile components in the matter is small; (3) the growth of microorganisms and the action of enzymes are prohibited, so that the original nature of the freeze-dried powder can be maintained; (4) the volume is almost unchanged, the original structure is maintained, and the phenomena of concentration and hardening do not occur; (5) the dried matter is loose, porous and spongy, the dissolution is quick and complete after water addition, and the original nature can be recovered immediately; (6) certain easily oxidized substances in vacuum are protected; and (7) 95-99% of water can be removed by drying, and the dried product can stored for a long time without deterioration.</p> |
