ATR-FTIR analysis was carried out to investigate the main structuralfeatures of the drug delivery systems. The spectra obtainedfrom BC (A), BC–berberine hydrochloride membrane (B), BC–berberine sulphate membrane (C), berberine sulphate powder(D), and berberine hydrochloride powder (E) are shown in Fig. 2aand b. Sample (A) displays the typical features of cellulosicsubstrates with intense bands around 3300, 2880, 1100 and
đang được dịch, vui lòng đợi..