Improving the structural, functional, and rheological properties of nonconventional stem pith starch from Corypha umbraculifera, by different chemical methods: a characterization study

Starch is an important ingredient in various food, and it influences the texture and consistency of food. To meet the industrial demand, nonconventional starch needs to be exploited. Therefore, this work aims to modify talipot palm (Corypha umbraculifera.) starch as a nonconventional source of stem pith starch by different chemical methods. The starch is modified by acid treatment (ATS), oxidation (OSS), and acetylation (ASS). The oxidation of talipot starch with NaOCl (Sodium hypochlorite) resulted in the formation of 0.06% carbonyl content. Similarly, acetylation with acetic anhydride produced starch with a low degree of substitution (0.038). The introduction of the acetyl group in ASS was confirmed by forming a peak at 1730 cm− 1 in FTIR spectra, whereas ATS and OSS did not possess any new peaks. All the starch exhibited a type-A diffractogram, and the changes in granule surfaces were noticed in the micrograph. The pasting profile, gel hardness, storage modulus, and loss modulus were significantly decreased by modifications. Modifications decreased starch digestibility.Please confirm if the author names are presented accurately and in the correct sequence (given name, middle name/initial, family name). Author 2 Given name: [Kappat Valiyapeediyekkal] Last name [Sunooj], Author 6 Given name: [Plachikkattu Parambil] Last name [Akhila]. Also, kindly confirm the details in the metadata are correct.YES