You went to cut an onion for cooking time or for frying eggs, and then started to weep tears on your eyes because of the onion breezes! What a matter of trouble! But where is the relation of drinking water with this onion cut? Why this happens ? Does not the question come to mind ?
There is a wide variety of sulfur compounds in onions , One salaphoksaida amino acids ( amino acid sulfoxide) . Onion cut on the inside of the cell ayalineja ( allinase) the enzyme comes out , the amino acid sulfoxides yaugaguloke salaphonika volatile acid ( sulfuric acid) in turn; Eye contact with the water, which soon as they reached syn-propanethial-S-oxide , a compound made, it is liable to bring tears. In simple words, gentle sulfuric acid is formed in contact with the eyes , so the eyes get blurred.
However , burning the feeling Cornea placed on free nerve ending ( where many nerves together at the meet), the brain identifies, then siliyari nerve ( biliary nerve) This feeling carried the pyarasimapyathetika nerve ( parasympathetic nerves), the lyakrimala glands ( lachrymal gland). As a result, water is covered with eyes.
Now, what is the way to survive?
If you keep the onion frozen or soaked in water before the thorn , then do not irritate your eyes during the onion thorns, and this will not cause water to flow through the eyes. What's so funny? Try it out.
Because of this, due to water contact with the water, sulfuric acid lost its function. The same case is also to be frozen. Then the efficacy of sulfuric acid decreased due to cold. As a result, it can not produce syn-propanethial-S-oxide compounds when exposed to tears . That is why the eyes do not burn.
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