Plantain starch was esterified with octenylsuccinic anhydride (OSA) at two concentrations (3 and 15% w/w) of OSA. The morphology, granule size distribution, pasting, gelatinization, swelling, and solubility of granules and structural features of the starch polymers were evaluated. Granules of the OSA-modified starches increased in size during cooking more than did the granules of the native starch, and the effect was greater at the higher OSA concentration. Pasting viscosities also increased, but gelatinization and pasting temperatures and enthalpy of gelatinization decreased in the OSA-modified starches. It was concluded that insertion of OS groups effected disorder in the granular structure. Solubility, weight average molar mass, Mw¯, and z-average radius of gyration, RGz, of the amylopectin decreased as the OSA concentration increased, indicating a decrease in molecular size.
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http://dx.doi.org/10.1016/j.ijbiomac.2014.06.061 | DOI Listing |
Prev Nutr Food Sci
December 2024
Research Center for Agroindustry, National Research and Innovation Agency, KST Soekarno, Cibinong 16911, Indonesia.
Food Sci Technol Int
November 2024
Laboratorio de Investigaciones en Postcosecha, Facultad de Ciencias Agroindustriales, Universidad del Quindío, Armenia, Quindío, Colombia.
Guayabo plantain (GP) starch was chemically modified by acetylation to evaluate its role as a stabilizer and emulsifier in low-fat dressings. Native starch (NS) from GP was chemically modified starch (MS), and its functional properties, such as water absorption index, water solubility index, swelling power, gelatinization temperature (), were evaluated. Additionally, functional groups and morphology were identified using Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy.
View Article and Find Full Text PDFJ Food Sci
November 2024
Department of Natural Sciences (DCN), State University of the Southwest of Bahia (UESB), Vitória da Conquista, Bahia, Brazil.
Polymers (Basel)
June 2024
Grupo Tribología, Polímeros, Metalurgia de Polvos y Transformaciones de Residuos Sólidos, Universidad del Valle, Calle 13 No. 100-00, Cali 76001, Colombia.
When the cocoa pod husk (CPH) is used and processed, two types of flour were obtained and can be differentiated by particle size, fine flour (FFCH), and coarse flour (CFCH) and can be used as a possible reinforcement for the development of bio-based composite materials. Each flour was obtained from chopping, drying by forced convection, milling by blades, and sieving using the 100 mesh/bottom according to the Tyler series. Their physicochemical, thermal, and structural characterization made it possible to identify the lower presence of lignin and higher proportions of cellulose and pectin in FFCH.
View Article and Find Full Text PDFPolymers (Basel)
May 2024
Departamento de Agroindustria, Facultad de Ciencias Agrarias, Universidad del Cauca, Sede Las Guacas, Popayán 190001, Colombia.
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