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281 results about "Sperm motility" patented technology

Sperm motility describes the ability of sperm to move properly through the female reproductive tract (internal fertilization) or through water (external fertilization) to reach the egg. Sperm motility can also be thought of as the quality, which is a factor in successful conception; sperm that do not "swim" properly will not reach the egg in order to fertilize it. Sperm motility in mammals also facilitates the passage of the sperm through the cumulus oophorus (a layer of cells) and the zona pellucida (a layer of extracellular matrix), which surround the mammalian oocyte.

Method for artificial propagation of giant salamanders and cultivation of baby giant salamanders

The invention discloses a method for artificial propagation of giant salamanders and cultivation of baby giant salamanders, which is characterized in that an ecological giant salamander farm is built in an original ecological region, the water in a cultivation pond comes from ravine streams of the original ecological region, the male giant salamanders are ecologically cultivated in classified ponds in different stages, the female giant salamanders are cultivated through indoor artificial cultivation, the male parent giant salamanders are specially cultivated by controlling water quality and water temperature and timely deploying nutrition, so that sperm motility of the male parent giant salamanders can be improved, and reproductive rate of the giant salamanders is further improved by performing selection, artificial hastened parturition and artificial fertilization on the parents; the propagated baby giant salamanders are cultivated in three stages, and disease prevention for the baby giant salamanders is performed in the feeding process. With the method of the invention, productivity of the artificially propagated giant salamanders can be more than 90%, the rate of artificial fertilization can be more than 80%, and hatchability can be more than 83.51%. By applying the method, population quantity of the giant salamanders can be improved, and scaled cultivation of the giant salamanders can be implemented.
Owner:SHAANXI HANSHUI GIANT SALAMANDER DEV

Anti-freezing agent and anti-freezing diluent for freezing and storing livestock sperm and preparation method thereof

The invention discloses an anti-freezing agent and an anti-freezing diluent for freezing and storing livestock sperm and a preparation method thereof. The anti-freezing agent for freezing and storing bovine and porcine sperm is algin, the amount of the algin added into the conventional diluent is 60 to 110 milligrams, wherein the conventional diluent is prepared from 1.1 grams of glucose, 1.48 grams of citric acid, 2.42 grams of Tris, 10 percent of fresh egg yolk, 0.06 gram of penicillin sodium and 0.1 gram of streptomycin sulfate, which are dissolved in 100 millimeters of distilled water. The adding amount of the algin for cattle is 100 to 110 milligrams, and the adding amount of the algin for pigs is 60 to 80 milligrams. The preparation method comprises the following steps of: adding 100 to 110 milligrams of algin and 4 percent glycerin (for cattle) or 60 to 80 milligrams of algin and 1 percent glycerin (for pigs) into the conventional diluent to prepare the anti-freezing diluent; and adjusting the pH value of the solution to be between 6.5 and 7.5, filtering and sterilizing the anti-freezing diluent under the osmotic pressure of 286mOsm/L, and putting the anti-freezing diluent into a 4 DEG C refrigerator for later use. The algin is used for freezing and storage of the bovine and porcine sperm for the first time, and after unfreezing, the sperm motility rate, the acrosome completeness rate and the plasma membrane completeness rate are 65 percent, 69 percent and 72 percent (for cattle) respectively and 58 percent, 62 percent and 63 percent (for pigs) respectively.
Owner:NORTHWEST A & F UNIV
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