Onion contains compounds of Sulfur. When we cut the onion, this sulfur goes in eyes and mixes with water in eyes. This combination makes Sulfuric Acid which makes us to cry.
http://answers.ask.com/Science/Nature/why_do_onions_mak...
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Unless you've avoided cooking, you've probably cut up an onion and experienced the burning and tearing you get from the vapors. When you cut an onion, you break cells, releasing their contents. Amino acid sulfoxides form sulfenic acids. Enz...
http://chemistry.about.com/od/chemistryfaqs/f/onionscry...
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I have found that when I have my contact lenses in cutting onions doesn't make me cry but if I don't have them in I will cry. I wonder if anyone else has noticed this.
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www.chow.com/stories/11192
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Did You Know? ... It is not the strong odor of the onion that makes us cry, but the gas that the onion releases when we sever this member of the lily family. ... Make a Quiz!
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www.coolquiz.com/trivia/explain/docs/onion.asp
www.coolquiz.com/trivia/explain/docs/onion.asp
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A sixth grade student named Katie would like to know why some onions make your eyes water and sting when you cut them and some do not? Thank you for your response! Answer: Julie/Katie: Onions may cause your eyes to tear for the following r...
http://www.newton.dep.anl.gov/askasci/bio99/bio99086.ht...
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Re: Why does peeling onions make people cry and also make their eyes sting? Date: Fri Jul 3 13:02:38 1998; Posted By: Erin Cram, Grad student, Molecular and Cellular Biology, University of CA, Berkeley; Area of science: General Biology;
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www.madsci.org/posts/archives/aug98/899611411.Gb.r.html
www.madsci.org/posts/archives/aug98/899611411.Gb.r.html
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Like other plants, onions are made of cells. These cells are divided into two sections separated by a membrane. One side of the membrane contains a chemical called an enzyme which helps chemical processes occur in your body. The other side ...
http://www.pa.msu.edu/sciencet/ask_st/021297.html
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Crying for Onion Chemistry by Megan FitzPatrick - This article from the Chem Ecology Education Center explains why onions make you cry. It gives suggestions on how to avoid tearing up when you cut an onion.
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www.loc.gov/rr/scitech/mysteries/onion.html
www.loc.gov/rr/scitech/mysteries/onion.html
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It is not the strong odor of the onion that makes us cry, but the gas that the onion releases when we sever this member of the lily family. The onion itself contains oil, which contains sulfur, an irritant to both our noses and to our eyes....
http://answers.yahoo.com/question/index?qid=20090419065...
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