Ran acoss another good article about extractions. This write up focuses on the various additives that impedes the extraction of active ingredients: http://www.pharmcast.com/Patents/Yr2001/March2001/030601/6197314_Tablet030601.htm (http://www.pharmcast.com/Patents/Yr2001/March2001/030601/6197314_Tablet030601.htm)
info posts, imma start posting em all in one place...
http://www.pharmcast.com/Patents/Yr2003/August2003/081203/6605300_Oral081203.htm (http://www.pharmcast.com/Patents/Yr2003/August2003/081203/6605300_Oral081203.htm)
this article describes EUDRAGIT a bit and discusses what different process the carrier goes through in drug delivery. first shell is activated by low ph, second by a rise in ph, and final is it appears just time