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Journal : Indonesian Food Science and TechnologyJournal

Rheological Characterization of Sugar Palm Fruits (Arenga pinnata) at Different Maturity Levels and Concentrations Yermia, Yermia; Pudji Rahayu, Winiati; Edhi Suyatma, Nugraha; Muhandri, Tjahja; Hari Purnomo, Eko
Indonesian Food Science and Technology Journal Vol. 8 No. 1 (2024): Volume 8 Number 1, December 2024 |IFSTJ|
Publisher : Department of Technology of Agricultural product (THP) Jambi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/ifstj.v8i1.37940

Abstract

Aren is a versatile crop with significant economic potential in tropical regions, particularly Southeast Asia. While young fruits are commonly processed into kolang-kaling, the industrial potential of both young and matured fruits, especially about their rheological and structural properties for edible packaging, still needs to be explored. This study investigates palm fruits' rheological and structural properties at different maturity stages and evaluates their potential for industrial applications, specifically in developing edible films. Rheometer testing revealed that young fruits exhibit pseudoplastic flow behavior (n < 1), whereas matured fruits display Newtonian flow behavior (n = 1). The consistency index (K) increased as concentration. Dynamic rheological measurement showed that young fruits experienced a decrease in LVR and matured fruits showed an increase at higher concentration. The storage modulus (G') of matured fruits was higher than that of young fruits, indicating better mechanical stability in the former Both young and matured fruit had a loss factor < 1 and G' greater than G", indicating elastic behavior predominance. X-ray diffraction (XRD) analysis showed that matured fruits have a crystalline structure, while young fruits are semi-crystalline. The crystalline properties of matured fruits make them suitable for applications requiring mechanical stability, such as edible film production. In contrast, the semi-crystalline nature of young fruits is better suited for flexible packaging applications. These findings open new opportunities for utilizing palm fruit as an innovative base material in developing eco-friendly edible packaging for the food industry.  
Exploring pH-Responsive Color Changes of Anthocyanin Extracts from Four Selected Plants as Potential Natural Food Deterioration Indicators Jusnita, Nina; Sugiyono, Sugiyono; Yuliana, Nancy Dewi; Suyatma, Nugraha Edhi
Indonesian Food Science and Technology Journal Vol. 9 No. 1 (2025): Volume 9 Number 1, December 2025 |IFSTJ|
Publisher : Department of Technology of Agricultural product (THP) Jambi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/ifstj.v9i1.46450

Abstract

Anthocyanins are natural pigments known for their pH sensitivity, resulting in distinct chemical structures and color changes across different pH levels. This study investigated the potential of anthocyanin-rich extracts from four plant sources, namely Antidesma bunius (L.) Spreng fruit extract (AE), Syzygium cumini fruit extract (SE), Hibiscus x archeri Wats. flower extract (HE), and Etlingera hemisphaerica flower extract (EE) as natural indicators for food deterioration. The extracts were evaluated for total anthocyanin content (TAC), antioxidant activity (as DPPH radical scavenging), antibacterial activity (via disk diffusion), and pH sensitivity based on visible color changes across a pH range of 2–12. Among the tested samples, HE exhibited the highest TAC (88.89 ± 1.40 mg C3G/g extract) and antioxidant activity (25.46 ± 1.62 mg AEAC/g extract). HE (50%) demonstrated promising antibacterial inhibition against A. hydrophila, S. typhimurium, and L. monocytogenes, with inhibition zones of 9.07 ± 0.49 mm, 9.04 ± 1.12 mm, and 10.19 ± 0.80 mm, respectively. Moreover, HE demonstrated clear, visually perceptible color transitions across pH levels, supported by variations in ΔE and oHue. The ΔE value increased from 3 at pH 3 to 9.55 at pH 8, while oHue value shifted from 36.63 o to 345.96o. This significant change is linked to the extract’s clear colour transition, which is red at pH 3-6, purple at pH 7, and red-purple at pH 8. These results demonstrate the HE as a promising candidate for pH indicator of food deterioration monitoring, as evidenced by its sensitivity to pH fluctuation among the tested extracts.
Co-Authors Adhitya Yudha Pradhana, Adhitya Yudha Adil Basuki Ahza Afriyanti Afriyanti Aisah Aisah Akbar, Kelvin Muhammad Akhmad Rasyid Syahputra, Akhmad Rasyid Anis Khairunnisa, Anis Anuraga Jayanegara Aprianti, Gustira Endah Ara Nugrahayu Nalawati Aritonang, Melva Linda Asti Nilatany, Asti Ata Aditya Wardana Auliana, Sigit Axiomawan, Firman Yudha BARLINA RINDENGAN, BARLINA Bayu Meindrawan Benita, Ashri Mukti Budi Nurtama Dede Robiatul Adawiyah desi juliani Dhita Sari Dias Indrasti Eko Hari Purnomo Elizabeth, Irma Rosiana Emmy Darmawati Evi Savitri Iriani Evi Savitri Iriani Evi Savitri Iriani Evy Damayanthi Fahim Muchammad Taqi Farha Herzegovina Fathia, Sarah Hadi Kurniawanto Hadian Iman Sasmita, Hadian Iman Harsi D. Kusumaningrum Hendra Adi Prasetia Herza Govina Sobarsa Heti Herawati Huunaefi, Dase Iman Sabarisman Imantho, Harry Imawati Eka Putri Irma Rosiana Elizabeth Irman Hermadi Islamy, Agung Isnaini Rahmadi Jaka Wijaya Kusuma Jamyang Tashi Wangdi Joko Hermanianto Karlisa Priandana Kudang Boro Seminar Ligar, Bonang Waspadadi Linda Trivana, Linda Lukitowati, Fajar Mona Nur Moulia Muhammad Arpah Muhammad Hauzan Arifin Muhammad Rivai Muhammad Sudirman Akili Mulyanto, Rizky Nuur Berlianni Nancy Dewi Yuliana Nancy Dewi Yulliana Nancy Dewy Yuliana Nanik, Rahmani nina Jusnita, nina Novia Nava Nuryanthi, Nunung Oktaviani oktaviani Pratama, Indra Mustika Puspo Edi Giriwono Raafqi Ranasasmita Raafqi Ranasasmita Risma Rahmatunisa Rizal Syarief Rizal Syarief Rizal Syarief S. Joni Munarso Sandi, Olifia Mutiara Saraswati Sari, Ruly Novita SEDARNAWATI YASNI Seminar, Annisa Utami Sentani Chasfila setiavani, gusti setiavani, gusti Sri Widowati Sri Yuliani Sugihartini, Rahayu Lestari Sugiyono Sugiyono . Sugiyono . Sugiyono Sugiyono Suhandi Syahnada Jaya Syaifullah Syaifullah, Syahnada Jaya Tien Ruspriatin Muchtadi Tien Ruspriatin Muchtadi Tjahja Muhandri Usman Ahmad Utama, Rozi Satria Vega Yoesepa Pamela Wardhana, Danu Indra Winiati Pudji Rahayu yermia, yermia yermia Yufriyana, Nur Yuliana, Nancy Dewy Yunus, Ade Lestari