CHEM 魚腥味

係咪有amine group就有fishy smell呀?
考過兩次啊=_=

2011-03-17 20:28:46 補充：
hi,你應該係2011考生
我都係

fishy smell近十年考左3次=.=
但舊十年似乎冇問過!
岩岩做2008年paper 2最最最後果題個marking又有fishy smell
我見到你條問題,
做少少research:

As fish decay, the nitrogenous compounds in their bodies are converted into amines--organic (carbon-based) molecules containing nitrogen. As the process of decay continues, amines of lower and lower molecular mass are produced. Because compounds with lower molecular mass are generally more volatile than those of higher molecular mass, these smaller molecules are smellier. So, as time passes, the fish get more and more pungent. Fresh fish does not smell because the amines they contain have a high enough molecular mass to prevent them from evaporating at room temperature.

原來molecular mass細既amine compound係有fishy smell !!!