Dodecenylsuccinic anhydride derivatives of gum karaya (Sterculia urens): preparation, characterization, and their antibacterial properties
Language English Country United States Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
25797306
DOI
10.1021/jf505783e
Knihovny.cz E-resources
- Keywords
- DDSA (dodecenylsuccinic anhydride) derivative, antibacterial activity, deacetylated gum karaya, rheological property, thermal study, tree polysaccharides,
- MeSH
- Succinic Anhydrides chemistry MeSH
- Anti-Bacterial Agents chemistry isolation & purification pharmacology MeSH
- Bacteria drug effects MeSH
- Karaya Gum chemistry isolation & purification pharmacology MeSH
- Plant Extracts chemistry isolation & purification pharmacology MeSH
- Sterculia chemistry MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Succinic Anhydrides MeSH
- Anti-Bacterial Agents MeSH
- Karaya Gum MeSH
- Plant Extracts MeSH
- succinic anhydride MeSH Browser
Esterifications of the tree-based gum, gum karaya (GK), using dodecenylsuccinic anhydride (DDSA) were carried out in aqueous solutions. GK was deacetylated using alkali treatment to obtain deacetylated gum karaya (DGK). The DGK and its DDSA derivative were characterized using gel permeation chromatography/multiangle laser light scattering (GPC/MALLS), attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), proton nuclear magnetic resonance spectroscopy ((1)H NMR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) analysis, and rheological studies. The degree of substitution was found to be 10.25% for DGK using (1)H NMR spectroscopy. The critical aggregation concentration of DDSA-DGK was determined using dye solubilization and surface tension methods. The antibacterial activity of the DDSA-DGK derivative was then investigated against Gram-negative Escherichia coli and Pseudomonas aeruginosa and Gram-positive Staphylococcus aureus. The DDSA-DGK derivative has the potential for use as a stabilizing agent in food and nonfood applications. It can also be developed as an antibacterial agent.
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