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All Journal Journal of Marine Research Global Education Journal
Nawastuti, Dati
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Earth & Planetary Sciences Education Social Sciences Other

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Journal : Global Education Journal

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Identification of Bacteria in Yellowfin Tuna (Thunnus albacares) With the Addition of Salt Lewar, Yulius Frederik; Nawastuti, Dati; Batafor, Yosephina M.J.
Global Education Journal Vol. 3 No. 1 (2025): Global Education Journal (GEJ)
Publisher : Civiliza Publishing, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59525/gej.v3i1.795

Abstract

One of the processed fishery products is se'i fish. Se'i is smoked meat processed traditionally using a smoking method with firewood and kosambi leaves. This study aims to identify the presence of Salmonella sp. and Escherichia coli bacteria in se'i tuna (Thunnus albacares) with salt treatment, as well as to evaluate factors that influence product safety. Tuna se'i samples were treated with coarse and fine salt additions with variations of 5 g and 10 g, as well as a control without salt. Bacterial identification was carried out using standard microbiological methods. The results showed that all samples, both control and salt treatment, were negative for Salmonella sp. and E. coli. This indicates that salt variation did not affect the results because all samples did not contain these bacteria. The dominant influencing factor was the use of garlic as a seasoning that contains allicin compounds with antibacterial properties that can inhibit the growth of spoilage bacteria. In addition, the packaging aspect plays an important role in improving the safety, quality, and competitiveness of se'i tuna products because it is safe for consumption and has great potential as a traditional specialty product.
Antioxidant Activity of Mud Crabs (Scylla Serrata) in the Kawaliwu Waters of Sinar Hading Village, Lewolema District Sogen, Santoris Gowing; Nawastuti, Dati; Batafor, Yosephina M. J.
Global Education Journal Vol. 3 No. 1 (2025): Global Education Journal (GEJ)
Publisher : Civiliza Publishing, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59525/gej.v3i1.793

Abstract

Kawaliwu waters are one of the areas with high potential for mangrove crabs. This study aimed to examine the antioxidant potential of mangrove crabs (Scylla serrata) collected from Kawaliwu waters in Sinar Hading Village, Lewolema District. This research method was experimental and employed a quantitative descriptive approach. Mangrove crab samples were prepared, dried, and extracted using 70% ethanol using the maceration method. The antioxidant activity of the extracts was tested using the DPPH (1,1-diphenyl-2-picrylhydrazyl) method. The results showed that antioxidant activity increased with increasing extract concentration. The IC₅₀ (Inhibition Concentration 50%) value of the mangrove crab extract was 65.25 ppm, which is categorized as a strong antioxidant. This finding indicates that mangrove crabs possess bioactive compounds with potential as a source of natural antioxidants.
Co-Authors Batafor, Yosephina M. J. Batafor, Yosephina M.J. Lewar, Yulius Frederik Lewoema, Zefirinus Kada Sogen, Santoris Gowing