00000ctm a22000003i 4500 UP-99796217612562630 Buklod 20170815161206.0 t r |||| u| ta 170815s2017 xx d r |||| u| (iLib)UPD-00343311754 DCHE rda eng LG 993.5 2017 F66 Y35 Yan, Donna Mae D. author. Development of ready-to-drink (RTD) sweet potato (Ipomea batatas) leaf extract (SPLE) with black tea in glass bottle Donna Mae D. Yan ; Abigail S. Rustia, adviser. Quezon City College of Home Economics, University of the Philippines Diliman 2017. xv, 76 leaves color illustrations, + 1 CD ROM (4 3/4 in) 28 cm text rdacontent. unmediated rdamedia. volume rdacarrier. Thesis Classification: P (For Publication) Thesis (B.S. Food Technology)--University of the Philippines Diliman June 2017. Includes bibliographical references and appendices. The aim of the study was to develop a ready-to-drink (RTD) sweet potato leaf extract (SPLE) with black tea in glass bottles. Statistical models were generated to predict the effects of calamansi-honey concentrate (CHC), black tea, and processing time on the physicochemical properties and consumer acceptability of the drink using response surface methodology (RSM) for each variety and maturity. Formulation and process parameters were optimized to minimize pH for product safety and stability, and to maximize overall acceptability of the product. Results showed that CHC had linear and quadratic effects (p<0.05) on pH and overall acceptability while black tea had linear effects (p<0.05) on pH. Models generated by RSM indicate that the optimal solutions were: (1) young Inubi with 10.50-11.49 ml CHC and 1.80-2 g black tea processed for 2-2.18 minutes; (2) young Kinerots with 10.44-11.09 ml CHC and 1.97-2 g black tea processed for 2-2.30 minutes; (3) mature Inubi 10.24-10.84 ml CHC and 1.92-2 g black tea processed for 2-2.48 minutes; and (4) mature Kinerots 10.16-10.55 ml CHC and 1.98-2 g black tea processed for 2-2.46 minutes. Verification of models proved that the generated models can adequately predict the effects of formulation and process parameters of the RTD SPLE with black tea. Vegetable juices Philippines. Sweet potato leaves Philippines. Rustia, Abigail S. adviser. FI UP UPD DCHE LG 993.5 2017 F66 Y35 Thesis