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All Journal Science and Technology Indonesia Journal of Halal Science and Research
Uddin, ABM Helal
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Environmental Science Materials Science & Nanotechnology Physics Other

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Journal : Journal of Halal Science and Research

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Analyzing swelling characteristic of Nata de Coco: A Study on quality control challenges and solutions Yahya, Mirza Auly; Khairi, Amalya Nurul; Uddin, ABM Helal; Metaragakusuma, Andi Patiware
Journal of Halal Science and Research Vol. 6 No. 1 (2025): February
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/jhsr.v6i1.8816

Abstract

Nata de coco is a food product derived from fermented coconut water with the help of the bacterium Acetobacter xylinum. CV ABC is the company that always produces nata de coco and notices the quality of the product. The problem in this study lies in the product standard testing, which often results in deviations from the swelling capacity test and the oversized test, which do not comply with company standards, thereby reducing the quality of Nata de Coco products. This research activity aims to analyze and formulate solutions related to the factors that cause deviations in production results. The method used is quantitative, with a graphical control chart to determine the magnitude of deviations that occur in the swelling capacity test and oversize test. Fishbone diagrams are used to determine the factors causing nata de coco to deviations from company standards. The data is in the form of documentation of the results of the swelling capacity test and the oversized test of 15 data. Data collection used a random sampling technique, which involved taking 400-gram samples of nata de coco from each batch. The results of the 15-day analysis showed that the swelling capacity test did not meet company standards by 7 days, or 47%, and the oversized test did not meet the maximum limit by 4 days, or 27%. Factors that dominate the causes of irregularities are equipment and people. There is a need for machine standardization and employee discipline to maintain the quality of nata de coco.   Keywords: Nata de coco, Oversize, Swelling capacity.
Physicochemical analysis, antioxidant activity, and hedonic evaluation of facial serum containing roselle (Hibiscus sabdariffa) and pomegranate (Punica granatum) extracts Permadi, Adi; Ardila, Yatus Widiana Hanizatul; Trijayati, Nanik; Putri, Mutiara Wilson; Uddin, ABM Helal
Journal of Halal Science and Research Vol. 7 No. 1 (2026): February
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/jhsr.v7i1.12871

Abstract

The utilization of natural ingredients in cosmetic applications is increasing due to public awareness of their safety and minimal side effects. This study aims to evaluate and compare the antioxidant activity of facial serums containing Hibiscus sabdariffa (roselle) and Punica granatum (pomegranate) extracts. Physical quality tests were conducted, including organoleptic, homogeneity, pH, specific gravity, and viscosity evaluations. Organoleptic observations showed both formulations had stable characteristics, including brown color, typical herbal aroma, and thick consistency without changes during storage. Homogeneity testing indicated no phase separation or sedimentation. The specific gravity of both serums was 1.02 g/mL, meeting SNI standards. Viscosity values were 2840 cps for roselle serum and 2540 cps for pomegranate serum, indicating appropriate consistency for topical use. The pH values were 3.75 ± 0.006 and 3.94 ± 0.017, respectively. Antioxidant activity was analyzed using the DPPH method. IC₅₀ values were 6000 ppm for roselle extract and 359.163 ± 0.437 ppm for pomegranate extract, indicating very weak antioxidant activity for anti-aging applications. This low activity may be influenced by extract concentration, degradation during formulation, storage conditions, and environmental exposure. While both serum formulations successfully met the SNI 19-4339-1996 physical quality requirements for topical use, their antioxidant efficacy was insufficient for potent anti-aging applications. This study contributes a critical baseline for natural serum formulation, identifying that physical stability does not guarantee antioxidant potency. These findings provide a necessary foundation for future research to focus on optimizing extract concentrations and stabilizing bioactive compounds against degradation during the formulation process. Keywords: Antioxidant activity, DPPH assay, Facial serum, Pomegranate extract, Roselle extract.
Co-Authors Adi Permadi, Adi Any Guntarti Ardila, Yatus Widiana Hanizatul Firdaus, Rizqi Amalia Khairi, Amalya Nurul Kurniawan, Muhammad Fariez Metaragakusuma, Andi Patiware Mustofa Ahda Nina Salamah Putri, Mutiara Wilson Trijayati, Nanik Yahya, Mirza Auly