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Q.

Why cutting onion causes tears in our eyes..?

Tags: relationships, health, cutting onion
Asked by jafar, 22 Nov '12 11:45 pm
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Answers (9)

1.

When you cut an onion, you break cells, releasing their contents. Amino acid sulfoxides form sulfenic acids. Enzymes that were kept separate now are free to mix with the sulfenic acids to produce propanethiol S-oxide, a volatile sulfur compound that wafts upward toward your eyes. This gas reacts with the water in your tears to form sulfuric acid. The sulfuric acid burns, stimulating your eyes to release more tears to wash the irritant away.
Answered by LIPSIKA, 23 Nov '12 09:26 am

 
  
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2.

When an onion is cut, certain (lachrymator) compounds are released causing the nerves around the eyes (lacrimal glands) to become irritated.
These compounds consist of methionine and cystine that are part of the amino acid family.
When an onion is sliced or diced, the onion's cells release these compounds into the air. When this occurs, "enzyme" works to alter the amino acids into Lachrymator compounds. This form of sulfuric acid irritates the nerves around the eyes making them tears.
Answered by Joseph Chacko, 23 Nov '12 02:50 am

 
  
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3.

As onions are sliced or eaten, cells are broken, allowing enzymes called alliinases to break down amino acid sulfoxides and generate sulfenic acids. A specific sulfenic acid, 1-propenesulfenic acid, formed when onions are cut, is rapidly rearranged by a second enzyme, called the lachrymatory factor synthase or LFS, giving syn-propanethial-S-oxide, a volatile gas known as the onion lachrymatory factor or LF The LF gas diffuses through the air and eventually reaches the eye, where it activates sensory neurons, creating a stinging sensation. Tear glands produce tears to dilute and flush out the irritant.[31] Chemicals that exhibit such an effect on the eyes are known as lachrymatory agents.
Answered by ajit kulkarni, 22 Nov '12 11:54 pm

 
  
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4.

Aansu gas release hota hai .
Answered by Aniruddhnishad, 23 Nov '12 03:03 am

 
  
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5.

Ammonia.
Answered by Surender Rao, 23 Nov '12 02:22 pm

 
  
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6.

Its acid evaporates fast from the sliced onion which causes burning sensation in our eyes.
Answered by Om Shrivastava, 23 Nov '12 12:30 am

 
  
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7.

SOx released from the cut onions causes tears in eyes.
Answered by MAdhavan Avadhany, 22 Nov '12 11:57 pm

 
  
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8.

It causes some unavoidable chemical reaction that burns the eyes
Answered by Annes, 22 Nov '12 11:52 pm

 
  
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