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All Journal Journal of Islamic Pharmacy Jurnal Pendidikan Fisika dan Teknologi
Xavier, Felipe
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Biochemistry, Genetics & Molecular Biology Chemistry Education Immunology & microbiology Medicine & Pharmacology Physics Public Health

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Optimization of Temperature and Time of Ultrasonic-Assisted Extraction Method on Flavonoid and Antioxidant Activity of Brown Rice from Demak, Indonesia Susiloningrum, Dwi; Karimah, Nailatul; Handayani, Yanulia; Ismah, Kadar; Ruas, Adilson Castro; Xavier, Felipe
Journal of Islamic Pharmacy Vol 9, No 1 (2024): J. Islamic Pharm.
Publisher : Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/jip.v9i1.27032

Abstract

Brown rice contains a number of bioactive components, such as pigments and flavonoids, which act as antioxidant. Plants widely distribute polar flavonoid compounds, which actively function as antioxidant. Antioxidants are substances that can significantly inhibit or prevent the oxidation of the substrate. The body requires antioxidants to defend itself against attacks by free radicals. The goal of this study was to find the best temperature and time for the Ultrasonic-Assisted Extraction (UAE) method to measure the antioxidant activity and flavonoids in brown rice extract using UV-Visible spectrophotometry. The extract was prepared using the UAE method with 96% ethanol solvent at 45°C and 55°C for 20–30 minutes. Data obtained was statistically analyzed using the one-way ANOVA test. The study found that brown rice extracted with 96% ethanol at 45°C for 20 minutes produced 4.089 mg QE (Quercetin Equivalent)/g of total flavonoids. The antioxidant activity was the lowest, with an IC50 value of 381.102 ppm. The statistical analysis using the one-way ANOVA test revealed that there were no differences in temperature or time optimization that affected the levels of flavonoids and antioxidants. It can be concluded that the 96% ethanol extract of brown rice has the best flavonoid and antioxidant content. The best treatment was at 45°C and 20 minutes of extraction time.
The Effect of Local Wisdom-Integrated Problem-Based Learning (PBL) Models on Learning Outcomes in Temperature and Heat Concepts Pilobu, Muznawaty; Odja, Abdul Haris; Xavier, Felipe; Fathan, Suparmin; Abdjul , Tirtawaty; Payu, Citron S.; Pikoli, Masrid; Yusuf, Muhammad; Mursalin, Mursalin; Ali, Ramli R.
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 11 No 2 (2025): July - December (In Press)
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v11i2.10563

Abstract

This study aims to analyze the effect of local wisdom-based Problem Based Learning (PBL) on junior high school students' learning outcomes in temperature and heat. The method used was a quantitative experiment with a one-group pretest–posttest design; the independent variable was PBL based on local wisdom integrated through Google Sites (e-modules, worksheets, videos, and contextual tasks), while the dependent variable was learning outcomes measured by achievement tests that had been validated by experts and declared to be highly valid. Data analysis included descriptive statistics, Shapiro–Wilk test for normality, Wilcoxon Signed-Rank test for paired comparisons, and N-Gain for effectiveness. The results show a significant increase: the class average increased from 45 to 84 and from 41 to 84; the posttest data was not normal, so Wilcoxon was used with results of Z = 4.111 and Z = 4.021 (p < 0.001), confirming a significant difference between the pretest and posttest. The average N-Gain = 0.69 (moderate category) with individual distribution in the moderate to high range, indicating that PBL based on local wisdom is effective in strengthening conceptual understanding and encouraging learning engagement. It is recommended to continuously integrate the local cultural context into science units through digital platforms, strengthen teacher training to facilitate PBL, and conduct further research with control groups, larger samples, and mixed approaches to examine conceptual changes and misconception reduction more comprehensively. It is recommended that local cultural contexts be continuously integrated into science units through digital platforms, that teacher training be strengthened to facilitate PBL, and that further research be conducted with control groups, larger samples, and mixed approaches to examine conceptual changes and misconception reduction more comprehensively.
Co-Authors Abdjul , Tirtawaty Abdul Haris Odja Ali, Ramli R. Citron S Payu Handayani, Yanulia Ismah, Kadar Karimah, Nailatul Masrid Pikoli Muhammad Yusuf Mursalin . Pilobu, Muznawaty Ruas, Adilson Castro Suparmin Fathan Susiloningrum, Dwi