I see a lot of research papers on propolis in the Journal of  
Agricultural and Food Chemistry.
You can search for articles here on the website <http://pubs.acs.org/ 
journal/jafcau> (upper right hand corner of the page).
Searching for "propolis" turned up 98 papers. Many of the papers  
discuss the botanical origins of the propolis, and many concern the  
chemical constituents and bioactive properties. The chemical profile  
of the propolis can oftentimes be used to identify the botanical source.

If you don't have institutional access, you may be limited to just  
abstracts for many of the articles. But the page with the abstract  
will also have the email address of the corresponding author. They  
will generally gladly email you a pdf reprint.

Kurt


--**--**--**--**--**--**--**--**--**--**--**--**--
Kurt Allerslev Reynertson, Ph.D.
Department of Pharmacology
Weill Medical College of Cornell University
1300 York Avenue, Box 70, E-409
New York NY 10021
(212) 746 6262
(212) 746 8835 fax



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