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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Salama, Hend E. Saad, Gamal R. Sabaa, Magdy W. |
| Description | Country affiliation: Egypt Author Affiliation: Salama HE ( Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt.); Saad GR ( Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt.); Sabaa MW ( Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt. Electronic address: mwsabaa@hotmail.com.) |
| Abstract | The Schiff bases of chitosan were synthesized by the reaction of chitosan with 3-(4-substituted-phenyl)-1-phenyl-1H-pyrazole-4-carbaldehyde. The structure of the prepared chitosan derivatives was characterized by FT-IR spectroscopy, elemental analysis, and X-ray diffraction studies and thermogravimetric analysis (TG). The results show that the specific properties of Schiff bases of chitosan can be altered by modifying the molecular structures with proper substituent groups.TG results reveal that the thermal stability of the prepared chitosan Schiff bases was lower than chitosan. The activation energy of decomposition was calculated using Coats-Redfern model. The antimicrobial activity of chitosan and Schiff bases of chitosan were investigated against Streptococcus pneumonia, Bacillis subtilis, Escherichia coli (as examples of bacteria) and Aspergillus fumigatus, Geotricum candidum and Syncephalastrum recemosum (as examples of fungi). The results indicated that the antimicrobial activity of the Schiff bases was stronger than that of chitosan and was dependent on the substituent group. The activity of un-substituted arylpyrazole chitosan derivative toward the investigated bacteria and fungi species was better than the other derivatives. |
| File Format | HTM / HTML |
| ISSN | 01418130 |
| Volume Number | 79 |
| e-ISSN | 18790003 |
| Journal | International Journal of Biological Macromolecules |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-08-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biochemistry Anti-infective Agents Chemistry Chitosan Pyrazoles Schiff Bases Chemical Synthesis Antifungal Agents Aspergillus Fumigatus Drug Effects Escherichia Coli Fungi Microbial Sensitivity Tests Spectroscopy, Fourier Transform Infrared X-ray Diffraction Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Structural Biology Molecular Biology Biochemistry |
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