00000nam a22000004a 4500 UP-8027390931316503693 Buklod 20251016101316.0 t r |||| u| ta 251016s2025 xxua rm 000 u|eng DCHE rda eng LG 993.5 2025 F66 V45 Ventinilla, Kyla Mariz R. author Effect of annealing on the thermal and functional properties of jicama (Pachyrhizus erosus) starch Kyla Mariz R. Ventinilla. Quezon City University of the Philippines Diliman 2025 xi, 92 leaves illustrations 28 cm. text rdacontent unmediated rdamedia volume rdacarrier In partial fulfillment for the Degree of Bachelor of Science in Food Technology Thesis Bachelor of Science in Food Technology University of the Philippines Diliman 2025 This thesis is available to the public. Thesis classification: F Annealing is a physical starch modification method recognized for enhancing the thermal and functional properties of native starch for broader industrial applications. In this study, jicama (Pachyrhizus erosus) starch was extracted and subjected to annealing treatment at different temperatures (T = 45°C, 50 °C, and 55°C) in a 1:6 starch/water ratio for 22 h. The starch has an extraction yield of 1.48% (wet basis). The thermal properties, functional properties, and water activity of the untreated and annealed starches were investigated. The annealing treatment resulted in increased water absorption (2.17 to 2.40 g/g), least gelation concentration (16% to 20%), and water activity (0.54 to 0.92). Conversely, it led to decreased solubility (6.76% to 4.31%), swelling power (10.39 to 7.66 g/g), oil absorption (2.05 to 1.55 g/g), and bulk density (0.64 to 0.48 g/mL). The onset temperature (51.67-56.33°C), peak temperature (62.66-76.54°C), conclusion (80.75-85.32°C) temperature, and enthalpy of gelatinization (109.11-124.01 J/g) increased, indicating improved thermal stability compared to the native starch. These modifications suggest that annealed jicama starch may be well-suited for use in products such as noodles, biodegradable packaging films, and other processed food items. Starch Processing. Starch Analysis. Jicama. Annealing. Starch. Functional properties. Thermal properties. Rombaoa-Sanchez, Rowena Grace O. adviser. Thesis Available for University of the Philippines Diliman via Digital Archives. Click here to access. https://digitalarchives.upd.edu.ph/item/63002/971/H7FbAmgKHeMkDll4biBckK2e UP Paper UPD DCHE LG 993.5 2025 F66 V45 Thesis