Synthesis and paste properties of octenyl succinic anhydride modified early Indica rice starch

Abstract

Abstract:Octenyl succinic anhydride (OSA) modified early Indica rice starch was prepared in aqueous slurry systems using response surface methodology. The paste properties of the OSA starch were also investigated. Results indicated that the suitable parameters for the preparation of OSA starch from early Indica rice starch were as follows: reaction period 4 h, reaction temperature 33.4 °C, pH of reaction system 8.4, concentration of starch slurry 36.8% (in proportion to water, w/w), amount of OSA 3% (in proportion to starch, w/w). The degree of substitution was 0.0188 and the reaction efficiency was 81.0%. The results of paste properties showed that with increased OSA modification, the starch derivatives had higher paste clarity, decreased retrogradation and better freeze-thaw stability.

Modification of wheat starch with succinic acid/acetanhydride and azelaic acid/acetanhydride mixtures. II. Chemical and physical properties

“…This is confirmation of higher reactivity of Golubica starch towards modification. Obtained values are, however, significantly higher than values reported by Song et al (2006) and Hui et al (2009) FT-IR spectra of starches bands originate mainly from the vibrational modes of amylose and amylopectin because these are the main components of starch (Amir et al 2011).…”

Mass Transfer and Chemical Reaction Approach of the Kinetics of the Acetylation of Gadung Flour using Glacial Acetic Acid

“…This finding is consistent with that reported by Song et al [19] who reported that at pH 9.5, side reaction (acetate starch hydrolysis) will be the dominant reaction. The optimized values of the reaction rate constants presented in Table 2 show that the value of mass transfer rate constant (Kcs) is smaller than chemical reaction constant (k).…”

“…Song et al [19] reported that at pH 9.5, side reaction (acetate starch hydrolysis) will be the dominant reaction. Luo and Zhou [15] reported that the lower value of acetyl groups concentration in the starch acetate with increasing reaction time is mainly caused by hydrolysis of the starch ester (starch acetate).…”

Functional Properties of Some Non-Conventional Treated Starches

“…According to Song et al (2006), the increase in the transmittance value of starch pastes might be attributed to the introduction of carboxyl group, which retained the water molecules to form hydrogen bonds in the starch granules, thereby, increasing the clarity of starch pastes. Taking into account that, the formation of carboxyl groups after e-beam treatment of starch was suggested by the increased acidity of the irradiated starch pastes, we can consider this also as a factor which contributes to the increase of the clarity.…”