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All Journal Journal of Food and Agricultural Product
Candraningrum, Roch Galih Saktya
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Agriculture, Biological Sciences & Forestry

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Review of Secondary Metabolite Identification Methods and Antimicrobial Activities of Tubers in Indonesian Firdaus, Dzikri Anfasa; Wijayanti, Eka; Candraningrum, Roch Galih Saktya
Journal of Food and Agricultural Product Vol. 5 No. 2 (2025): JFAP
Publisher : Fakultas Pertanian Universitas Veteran Bangun Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/jfap.v5i2.7256

Abstract

The activity of inhibiting bacterial growth has been extensively studied from various natural materials in Indonesia. One part of plants which is contains active compounds that inhibit bacterial growth is local tubers such as gadung, sweet potatoes, porang, suweg, and several other types of tubers. The bacterial inhibitory secondary metabolite compounds contained in tubers like saponins, tannins, quinones, flavonoids, alkaloids, and phenols. These compounds exhibit antibacterial activity in the form of inhibition zone diameters against Escherichia coli, Staphylococcus aureus, and Salmonella sp. The 15% methanol extract of Angiotepris sp. tubers, containing flavonoid and phenolic compounds, exhibited the best inhibition zone diameter against Staphylococcus aureus, measuring 28.4 mm. This article explains the differences in bacterial inhibition activity demonstrated by 13 types of tubers, with a total of 79 variations in extraction treatments, including the concentrations and solvents used. Keywords: antibacterial, secondary metabolites, tubers, inhibitors, inhibition zone
Evaluation of Drinking Water Quality Based on Quality Standards as a Guarantee of Food Safety in Serang Regency Purba, Angelina Sondang; Pratiwi, Afny Nur; Sunari, Tetin; Salim, Abu; Candraningrum, Roch Galih Saktya
Journal of Food and Agricultural Product Vol. 6 No. 1 (2026): JFAP
Publisher : Fakultas Pertanian Universitas Veteran Bangun Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/jfap.v6i1.8034

Abstract

Drinking water is a basic human need that must meet quality standards to ensure its safety for consumption. Water contamination can occur due to human activities and environmental factors that may reduce water quality. This study aimed to evaluate the quality of drinking water in Serang Regency based on physical, chemical, and microbiological parameters. Fifteen drinking water samples were analyzed in the lab using MPN method for microbiological parameters (Coliform and Escherichia coli), as well as physical and chemical parameters (nitrite, nitrate, pH, turbidity, iron content, taste, and odor). The results showed that all samples met the standards for chemical parameters, as well as physical parameters including pH, taste, and odor. However, several samples had turbidity values exceeding the limit set by the Minister of Health Regulations, although still within the WHO’s standard limit. Microbiological analysis revealed the presence of coliform bacteria and Escherichia coli in several samples, indicating that they didn’t meet the required standards. In conclusion, the majority of Serang Regency's drinking water samples satisfied physical and chemical quality standards, while some samples did not meet microbiological requirements. This suggests that continuous monitoring and appropriate management of drinking water quality are necessary to guarantee public health safety. Keywords: drinking water, quality standard, food safety
Co-Authors Eka Wijayanti Firdaus, Dzikri Anfasa Pratiwi, Afny Nur Purba, Angelina Sondang Salim, Abu Sunari, Tetin