[docbook] Chemical equations in docbook.

[Professor Jose <instruistojose at ig dot com dot br>]

Dear Friends,

I'm using docbook with my Linux (slackware 9.1 or Red Hat 9) to produce 
documents
in HTML for my webwite.

I just write the xml files with a header like:

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"/usr/share/sgml/docbook/xml-dtd-4.1.2/docbookx.dtd">

<article lang="pt-br">

? ?<articleinfo>
? ?<title>UMA VISÃO INTEGRADA PARA O TRATAMENTO SUSTENTÁVEL DA ÁGUA</title>
? ?<authorgroup>...

And use a script "jw" to produce de html files or the rtf files.

The site is under consctruction.

Now I'm trying to write equations of chemical equilibrium 
with right and left arrows, greek letters (radiation), radical etc.

Do you know any way to include this kind of equations
into my xml documents?

Thanks in advance,
Prof. Jose