article_snippet: When an onion bulb is cut an onion bulb causes a chemical reaction that generates propanthial S-oxide.
article_snippet: a chemical reaction that generates propanthial S-oxide also creates thiosulphinate, which creates the onion’s distinctive flavour.
article_snippet: When an onion bulb is cut an onion bulb causes a chemical reaction that generates propanthial S-oxide (pictured left).
article_snippet: When an onion bulb is cut an onion bulb causes a chemical reaction that generates propanthial S-oxide.
article_snippet: a chemical reaction that generates propanthial S-oxide also creates thiosulphinate, which determines the onion’s flavour.
highlights_snippet: When an onion  is cut a chemical reaction  generates propanthial S-oxide .
  