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Riftyan, Emma
Universitas Riau
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KARAKTERISTIK MUTU YOGHURT BUAH NAGA MERAH (HYLOCEREUS POLYRHIZUS) SELAMA PENYIMPANAN Bangun, Haganta; Pato, Usman; Riftyan, Emma
SAGU Vol. 24 No. 2 (2025): SAGU Journal – Agri. Sci. Tech., September, 2025, Vol. 24 : No. 2
Publisher : Fakultas Pertanian Universitas Riau

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Abstract

Yogurt is a beverage product processed through milk fermentation using Lactobacillus bulgaricus and Streptoccocus thermophilus. To add flavor, color, and aroma so as to improve the oraganoleptic properties of yogurt, it is necessary to add fruit in the manufacturing process such as dragon fruit. The use of red dragon fruit puree in yogurt is expected to increase the shelf life of yogurt, improve organoleptic, and increase the nutritional value of yogurt, as well the antioxidants content that function to prevent or delay several types of cell damage due to the oxidation. This study aimed to determine the quality characteristics of red dragon fruit yogurt during storage. The research was carried out using a completely randomized design with four treatments. The treatments in the study included storage times of 0, 7, 14, and 21 days at cold temperatures (4°C) which were repeated four times to obtain 16 experimental units. The data obtained were analyzed statistically using the ANOVA test. If the calculated F value is greater than or equal to the F table, then it is continued with Duncan's New Multiple Range Test (DNMRT) at the 5% level. The results of the analysis of variance showed that the storage times of red dragon fruit yogurt had a significant  effect on the degree of  the total lastic acid bacteria, total titratable acid, pH and viscosity. The results showed that the strorage period of red dragon fruit yoghurt had no significant effect on antioxidant activity as well as descriptive sensory assessment. The selected treatment was, P3 (14 days) red dragon fruit yogurt with, total LAB of 8.91 log CFU/ml, pH of 4.76, total titrated acid of 0.369%, viscosity of 726.82cP, and antioxidant of 10.52 ppm. The yogurt in P3 (14 days) treatment tasted sour, was red, smelled like dragon fruit, was a little thick.
PHYSICOCHEMICAL AND ORGANOLEPTIC PROPERTIES OF FLAKES MADE FROM HEAT MOISTURE TREATMENT (HMT)-MODIFIED PURPLE SWEET POTATO AND MUNG BEAN Ghina Qanitah Valerie; Fitriani, Shanti; Riftyan, Emma; Mohamad, Nizaha Juhaida
SAGU Vol. 25 No. 1 (2026): SAGU Journal – Agri. Sci. Tech., Maret, 2026, Vol. 25 : No. 1
Publisher : Fakultas Pertanian Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jsg.v25i1.14

Abstract

This study aimed to determine the optimal ratio of heat moisture treatment (HMT)–modified purple sweet potato flour and mung bean flour for flakes production. Flakes are instant foods typically made from cereal-based ingredients through baking. Purple sweet potato flour is a promising local raw material but has limited physical properties, which can be improved through HMT modification. Mung bean flour was added to enhance protein content. A completely randomized design with four treatments and four replications was applied. The treatments were ratios of HMT-modified purple sweet potato flour to mung bean flour: UK1 (80:20), UK2 (70:30), UK3 (60:40), and UK4 (50:50). Data were analyzed using analysis of variance (ANOVA) followed by Duncan’s Multiple Range Test (DMRT) at a 5% significance level. Results showed that the flour ratio significantly affected moisture, ash, protein, fat, and carbohydrate contents, as well as crispness retention and sensory attributes (color, aroma, taste, and texture). The best formulation was UK4 (50:50), with moisture content of 3.18%, ash 2.11%, protein 13.81%, fat 2.82%, carbohydrate 78.08%, and crispness retention of 8.33 minutes. Sensory evaluation indicated a brownish-purple color, slight mung bean aroma, characteristic mung bean taste, and crispy texture, with overall acceptance rated as “liked.”
Co-Authors Abdan Syakur, Abdan Agustina, Hylda Putri Alexander Hutagaol Annisa Rahma Anthony Hamzah Apriani, Imelda Nur AR, Nur Hasnah Ayu, Dewi Ayu, Nur Lidya Bangun, Haganta Chairani, Shauma Fithra Dewi Fortuna Ayu Dewi, Yossie Kharisma Edfan Darlis Edo Saputra Erpiani Siregar Fadhilah, Tiyah Fajar Restuhadi Firmansyah, M. Hafiddin Ghina Qanitah Valerie Gultom, Priscila Manuella Gunawan, Chandra Gussamwang, Muhammad Harahap, Hamdan Fauzi Harvey, Edwardo Hasnah, Nur Hutagaol, Alexander Irwandi Jaswir Junita, Putri Khairany, Septy Lestari, Ririn Puji Mohamad, Nizaha Juhaida Mutiara, Syawatul Netti Herawati Nisbah Nisbah Nopiani, Yanti Nugroho, Wahyu Satrio Nur Hasnah AR Nurmitha, Rossy Olo Marasi Siagian Panjaitan, Bintang Sipartogi Prihartini, Asti Dian Ramadhani Putri, Cahya Dwi Putri, Dea Aulia Rahmayuni Rahmayuni Rahmayuni, Rahmayuni Ristia, Jeany Rossi, Evy Royyan Firdaus S Siswanto Salman, Annisa Nazifa Shanti Fiftriani Shanti Fitriani Siswanto Sitohang, Jeplin Susanti, Dewi Susi USMAN PATO Va, Hanny Sc Vonny Setiares Johan Vonny Setiaries Johan Wasisso Tunggul Pawenang Yusmarini Yusmarini Yusni Maulida