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All Journal Jurnal Pangan dan Agroindustri Jurnal Riset Teknologi Pangan Dan Hasil Pertanian (RETIPA)
Susilo, Donor Utomo M.
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Agriculture, Biological Sciences & Forestry

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Effect of Adding Different Active Substances on Inhibition Zone Diameter and Microstructural Properties of Composite Bioplastics Permatasari, Nelsy Dian; Witoyo, Jatmiko Eko; Susilo, Donor Utomo M.; Saraswati, Ayu Rahayu; Masruri; Yuwono, Sudarminto Setyo; Widjanarko, Simon Bambang
Jurnal Pangan dan Agroindustri Vol. 13 No. 1 (2025): January 2025
Publisher : Department of Food Science and Biotechnology, Faculty of Agriculture Technology, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpa.2025.013.01.2

Abstract

This study identifies the phytochemical compounds in ethanolic extracts of Syzygium myrtifolium leaves, applies it to developing composite bioplastics as a natural antibacterial agent, and compares it with composite bioplastics prepared with sodium benzoate, particularly regarding inhibition zone diameter and microstructure. The results showed that the phytochemicals were identified in the ethanolic extract of Syzygium myrtifolium leaves, like flavonoids, alkaloids, tannins, phenolics, terpenoids, and saponins. LC-MS confirming bioactive in it as auraptenol, calopiptin, quercetin-3-O-β-D-glucuronide, and quercetin-3-O-L-arabinopyranoside. Moreover, in vitro tests showed that composite bioplastics with the ethanolic extracts of Syzygium myrtifolium had inhibition zone diameter against E. coli, similar to those with sodium benzoate added. Additionally, the microstructure of the composite bioplastics with the ethanolic extracts of Syzygium myrtifolium was rougher, irregular, and more porous than those of another. It indicated that the ethanolic extract of Syzygium myrtifolium leaf could be used as a natural antibacterial agent to replace the chemical agent.  
Karakteristik Struktural Bioplastik dari Tepung Porang dan Campuran Tepung Porang–Tepung Biji Durian Permatasari, Nelsy Dian; Witoyo, Jatmiko Eko; Susilo, Donor Utomo M.; Widjanarko, Simon Bambang
Jurnal Riset Teknologi Pangan dan Hasil Pertanian (RETIPA) Volume 5 Nomor 2
Publisher : Universitas Katolik Santo Thomas Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54367/retipa.vi.4238

Abstract

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Co-Authors Jatmiko Eko Witoyo Masruri Nelsy Dian Permatasari SARASWATI, Ayu Rahayu SIMON BAMBANG WIDJANARKO Sudarminto Setyo Yuwono