TY  - JOUR
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Živković, Ljiljana S.
AU  - Ćosović, Vladan
AU  - Pavlović, Vladimir B.
AU  - Nikolić, Ivana
AU  - Maravić, Nikola
AU  - Dokić, Ljubica
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6560
AB  - In this study, levan from Bacillus licheniformis NS032 was modified in an aqueous medium by octenyl succinic
anhydride (OSA), and the properties of the obtained derivatives were studied. The maximum efficiency in the
synthesis reaction was achieved at 40 ◦C and a polysaccharide slurry concentration of 30 %. Increasing the
reagent concentration (2–10 %) led to an increase in the degree of substitution (0.016–0.048). Structures of
derivatives were confirmed by FTIR and NMR. Scanning electronic microscopy, thermogravimetry, and dynamic
light scattering analyses showed that the derivatives with degrees of substitution of 0.025 and 0.036 retained
levan’s porous structure and thermostability and showed better colloidal stability than the native polysaccharide.
The intrinsic viscosity of derivatives increased upon modification, while the surface tension of the 1 % solution
was lowered to 61 mN/m. Oil-in-water emulsions prepared with sunflower oil (10 % and 20 %) by mechanical
homogenization and 2 and 10 % derivatives in the continuous phase showed mean oil droplet sizes of 106–195
μm, while the distribution curves exhibited bimodal character. The studied derivatives have a good capacity to
stabilize emulsions, as they have a creaming index ranging from 73 % to 94 %. The OSA-modified levans could
have potential applications in new formulations of emulsion-based systems.
PB  - Elsevier
T2  - International Journal of Biological Macromolecules
T1  - Synthesis of octenyl succinic anhydride-modified levan and investigation of its microstructural, physicochemical, and emulsifying properties
VL  - 242
SP  - 124837
DO  - 10.1016/j.ijbiomac.2023.124837
ER  - 

@article{
author = "Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Živković, Ljiljana S. and Ćosović, Vladan and Pavlović, Vladimir B. and Nikolić, Ivana and Maravić, Nikola and Dokić, Ljubica",
year = "2023",
abstract = "In this study, levan from Bacillus licheniformis NS032 was modified in an aqueous medium by octenyl succinic
anhydride (OSA), and the properties of the obtained derivatives were studied. The maximum efficiency in the
synthesis reaction was achieved at 40 ◦C and a polysaccharide slurry concentration of 30 %. Increasing the
reagent concentration (2–10 %) led to an increase in the degree of substitution (0.016–0.048). Structures of
derivatives were confirmed by FTIR and NMR. Scanning electronic microscopy, thermogravimetry, and dynamic
light scattering analyses showed that the derivatives with degrees of substitution of 0.025 and 0.036 retained
levan’s porous structure and thermostability and showed better colloidal stability than the native polysaccharide.
The intrinsic viscosity of derivatives increased upon modification, while the surface tension of the 1 % solution
was lowered to 61 mN/m. Oil-in-water emulsions prepared with sunflower oil (10 % and 20 %) by mechanical
homogenization and 2 and 10 % derivatives in the continuous phase showed mean oil droplet sizes of 106–195
μm, while the distribution curves exhibited bimodal character. The studied derivatives have a good capacity to
stabilize emulsions, as they have a creaming index ranging from 73 % to 94 %. The OSA-modified levans could
have potential applications in new formulations of emulsion-based systems.",
publisher = "Elsevier",
journal = "International Journal of Biological Macromolecules",
title = "Synthesis of octenyl succinic anhydride-modified levan and investigation of its microstructural, physicochemical, and emulsifying properties",
volume = "242",
pages = "124837",
doi = "10.1016/j.ijbiomac.2023.124837"
}

Gojgić-Cvijović, G., Jakovljević, D., Živković, L. S., Ćosović, V., Pavlović, V. B., Nikolić, I., Maravić, N.,& Dokić, L.. (2023). Synthesis of octenyl succinic anhydride-modified levan and investigation of its microstructural, physicochemical, and emulsifying properties. in International Journal of Biological Macromolecules
Elsevier., 242, 124837.
https://doi.org/10.1016/j.ijbiomac.2023.124837

Gojgić-Cvijović G, Jakovljević D, Živković LS, Ćosović V, Pavlović VB, Nikolić I, Maravić N, Dokić L. Synthesis of octenyl succinic anhydride-modified levan and investigation of its microstructural, physicochemical, and emulsifying properties. in International Journal of Biological Macromolecules. 2023;242:124837.
doi:10.1016/j.ijbiomac.2023.124837 .

Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Živković, Ljiljana S., Ćosović, Vladan, Pavlović, Vladimir B., Nikolić, Ivana, Maravić, Nikola, Dokić, Ljubica, "Synthesis of octenyl succinic anhydride-modified levan and investigation of its microstructural, physicochemical, and emulsifying properties" in International Journal of Biological Macromolecules, 242 (2023):124837,
https://doi.org/10.1016/j.ijbiomac.2023.124837 . .