## Abstract The rapidly expanding use of chitomaterials in biomedical applications demands accurate and precise analytical methods to determine physicoβchemical characteristics, especially the acetyl content of the sample. The analytical methods available for the determination of the acetyl content
β¦ LIBER β¦
The assay of phosphoric acid*
β Scribed by Maurina, F.A.
- Publisher
- Elsevier
- Year
- 1928
- Weight
- 266 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0898-140X
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## Abstract **Summary:** We report a study of thermoreversible gelation of polybenzimidazole (PBI) in phosphoric acid (PA). The PBI gel in PA exhibits fibrillar network morphology and reversible first order phase transition. The gelation rate is measured by the tube tilting method and found to depe