character set problem

[shahrzad khorrami]

Hi,
I want to search from a table , I have a table with a column that each
record filled with different character set ,is it possible
to know what are their character set and then is it possible to change all
of them
to a character set ,how can I do that?
these  records show like below that I don't know what are their charset :

ارÚ(c)يد شيمی جهان
توليد

thanks