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Boar semen normally has a slightly alkaline pH (7.3 - 7.9) which, as time passes and if the semen is not correctly diluted, becomes more acidic. As a norm of handling and correct use of semen, it is desirable that the ejaculate spends as little time as possible at 37ºC since at this temperature sperm cells are stimulated to move and accumulate lactic acid..
A very noticeable feature of boar sperm cells is the abundance of phospholipids in the plasma and acrosome membranes. This biochemical characteristic determines that these membranes are particularly vulnerable to lipid peroxidation. This causes damage to the sperm cell which later leads to the loss of metabolites and enzymes fundamental to its functioning and its ability to fertilize the ovum. ACROMAX ® contains chelating agents whose job it is to capture ions that could accelerate deterioration reactions in the sperm cell. This maintains the integrity of these cells for long periods of time. Amongst the most detrimental ions are Fe2+ which acts as a catalyst of lipid peroxidation, Pb2+ and Cu2+ which cause chemically-originated aglutination of sperm, and Ca2+ which can initiate the acrosome reaction. This reaction is essential at the exact moment of fertilization and would be premature and detrimental if it were to occur during the preservation of semen.
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