Blue food coloring. .
Sulfur.
There is starch present within the onion cell which causes the black-blue color reaction when introduced to iodine.
blue
alcohol
The exhaust is stainless steel. Heat causes stainless steel to turn blue.
Once you find a type of Pikmin, their Onion comes with them. If you find blue Pikmin, for example, you automatically have the blue Onion.
Probably the formation of the blue form of the hydroxide Co(OH)2.
Bleaching you hair because black dye has alot of blue in it. Yellow and blue makes green.
methylene blue
It's taste is enhanced. Frying the onion causes the naturally occurring sugars in the onion to become caramelised, creating sweetness.
Onions do not contain starch. Instead, onions contain carbohydrates which are present in the food in the form of sugars and fibers.
The OH- particle, which is the polyatomic ion hydroxide.
what is the causes of blue revolution