| Literature DB >> 11943389 |
Jadwiga Tritt-Goc1, Narcyz Piślewski.
Abstract
Magnetic resonance imaging has been used to monitor the hydration of hydroxypropylmethylcellulose samples by two-dimensional mapping of properties such as spin density and relaxation times. The measurements were performed at two pH values of water: 2 and 6 and two temperatures 25 and 37 degrees C. It is shown that transport behavior of water into HPMC changes from being almost completely relaxation controlled (case II) at pH=2 to Fickian behavior for pH=6. It was also observed that radial swelling is larger for the system composed of HPMC and water at pH=6 than at pH=2.Entities:
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Year: 2002 PMID: 11943389 DOI: 10.1016/s0168-3659(01)00556-9
Source DB: PubMed Journal: J Control Release ISSN: 0168-3659 Impact factor: 9.776