Is there a way to handle special text formatting, such as
superscripts, in feeds?

For example, I want to make the titles look nice in feeds from the
Journal of Chemical Physics (http://scitation.aip.org/rss/jcp4.xml).
They currently have ugly constructs like "(HCN)[sub n][sup -]". It
gets positively unreadable for articles involving any kind of
spectroscpic notation.

My first attempt was to replace the brackets with HTML formatting,
like "(HCN)_n^-". However, the HTML tags do not
carry though in the RSS readers I tried (Yahoo and Google).

This could be an unsolvable problem, as many readers are not web-based
and need to present the title as plain text. However, it would be nice
to see real subscripts and superscripts.

Thanks,
Kyle