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All Journal Jurnal Teknologi Industri Pertanian agriTECH Jurnal Sains dan Teknologi Pangan Pro Food Canrea Journal: Food Technology, Nutritions, and Culinary Journal Journal of Functional Food and Nutraceutical Jurnal Kebidanan Indonesia IJECS: Indonesian Journal of Empowerment and Community Services Journal of Food and Agricultural Product Journal of Applied Agriculture, Health and Technology
Mulyani, Rizka
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Effects of Konjac (Amorphophallus muelleri Blume) Flour Addition and Drying Time on the Crude Fiber and Texture Level of Instant Yellow Rice Anam, Choiroel; Zulfa, Fitriyah; Suleman, Dininurilmi Putri; Abdi, Yenny Febriana Ramadhan; Mulyani, Rizka; Rochmah, Alfi Nur; Adi, Prakoso; Rahmawati, Adinda Dwi
agriTECH Vol 44, No 2 (2024)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.83405

Abstract

Instant yellow rice is a traditional breakfast dish prepared using special technology for quick and practical cooking and a longer shelf life. Since rice has low crude fiber content as the main ingredient, substitution with local sources, such as konjac flour, can be made. Konjac flour is the powdered root of konjac plant, and it contains high crude fiber. Therefore, this study aimed to examine the texture and crude fiber properties of instant yellow rice with the addition of konjac flour. Furthermore, a completely randomized design (CRD) was used with two factors, namely variations in konjac flour concentration (2%, 3%, and 4%) and variations in drying time (5 hours, 6 hours, and 7 hours). Each sample was analyzed for the physical (hardness, stickiness and chewiness texture) and chemical characteristics (crude fiber content). The results showed that the konjac flour concentration had a significant (p<0.05) effect, while the drying time had no significant (p<0.05) effect on the physical and chemical characteristics of instant yellow rice. Therefore, 5 hours of drying might be enough for the rice processing. The addition of 2% konjac flour on instant yellow rice dried for 5 hours showed 2.48±0.50 a N of hardness texture, 5.53±0.07 c N stickiness texture, 4.59±0.02 a N chewiness texture, and 5.20% of crude fiber. Addition of 3% konjac flour on instant yellow rice dried for 5 hours showed 5.74±0.08 b N of hardness texture, 4.73±0.17 b N stickiness texture, 4.37±0.05 a N chewiness texture, and 5.20% of crude fiber. The addition of 4% konjac flour on instant yellow rice dried for 5 hours showed 6.41±0,02 c N of hardness texture, 4.06±0.70 b N stickiness texture, 3.33±1.52 a N chewiness texture, and 5.35% crude fiber. This showed the best treatment was the use of instant yellow rice with 4% konjac flour addition at 5 hours drying time.
Preservasi Vitamin C, Kapasitas Antioksidan, dan Sensoris Nanas (Ananas comosus) Segar Potong Proses Minimal menggunakan Blansir Suhu Rendah Rochmah, Alfi Nur; Lazuardi, Earlian Zaka Bintang; Mulyani, Rizka; Adi, Prakoso; Aryani, Yeni; Ngadiarti, Iskari; Alyensi, Fatiyani; Ropitasari, Ropitasari; Abdi, Yenny Febriana Ramadhan; Nadhilah, Dini; Suleman, Dininurilmi Putri; Rizki, Prajwalita Rukmakharisma; Zulfa, Fitriyah
Pro Food Vol. 11 No. 2 (2025): Pro Food (Jurnal Ilmu dan Teknologi Pangan)
Publisher : Fakultas Teknologi Pangan dan Agroindustri, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/profood.v11i2.526

Abstract

Pineapple (Ananas comosus) is a nutrient-rich tropical fruit known for its high content of vitamin C, bromelain enzyme, and phenolic compounds with antioxidant properties, which are prone to degradation during storage. This study investigated the effect of mild heat blanching (40 °C, 50 °C, and 60 °C) on the physicochemical and sensory qualities of blanching-treated fresh-cut pineapple. The blanching process was applied to improve shelf life while preserving key nutritional attributes, particularly vitamin C content, which is sensitive to thermal degradation. Pineapples were pretreated with 0.15% calcium chloride and subjected to blanching for 5 minutes, vacuum-packed, frozen, thawed, and evaluated for antioxidant activity (DPPH method), vitamin C content (iodometry), total soluble solids (TSS), pH, and sensory attributes (hedonic rating). Researchs result showed that blanching at 60 °C significantly preserved vitamin C (865.33 mg/100g) and antioxidant activity (17.39%) compared to using lower temperatures (40 °C, 50 °C), while maintaining acceptable sensory properties. Although blanching reduced TSS and pH compared to fresh pineapple, the treatment at 60 °C achieved the highest preference scores for color, aroma, taste, and texture. The De Garmo effectiveness index identified 60 °C as the optimal blanching temperature, balancing nutritional preservation and consumer acceptability. These findings suggest that controlled blanching at 60 °C is a viable preservation method for fresh-cut pineapple, extending shelf life while maintaining sensory and functional quality.
Co-Authors ABDI, YENNY FEBRIANA RAMADHAN Adi, Prakoso Ali, Mochamad Zulfan ALYENSI, FATIYANI Amiruddin, Achmad Chi-Ming , Hsieh Choiroel Anam Eni Harmayani Hidayat, Serli Hatul Indrati Kusumaningrum, Indrati Ishida, Momoko Iskari Ngadiarti Jackson Yang, John Khabibah, Lutfia Nur Khirana, Ragil Siwi Puspa khusnul khotimah Lazuardi, Earlian Zaka Bintang Nadhilah, Dini Ningrum, Widya Rafika Nishi, Kosuke Nur Rochmah, Alfi Nurliyani Prajwalita Rukmakharisma Rizki Rahmawati, Adinda Dwi Rakhmayati, Oktavianisa Ramadhan Abdi, Yenny Febriana Retno Widyastuti, Retno Rochmah, Alfi Nur Ropitasari Ropitasari Rukmakharisma, Prajwalita Sari, Putri Antasya Wandan Sari, Silvia Citra Sugahara, Takuya Suleman, Dininurilmi Putri Yang, John Jackson Yeni Aryani Zulfa, Fitriyah