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All Journal 3BIO: Journal of Biological Science, Technology and Management ETNIK : Jurnal Ekonomi dan Teknik Molekul: Jurnal Ilmiah Kimia
Febriyanto, Dimas
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Electrical & Electronics Engineering Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Neuroscience

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Region-Specific Thermal Stability of Kelulut Honey from Indonesia: Implications for Quality and Processing Setyawati, Inda; Meirila, Salvinia Fara; Febriyanto, Dimas; Andriyanto, Dimas
3BIO: Journal of Biological Science, Technology and Management Vol. 7 No. 2 (2025)
Publisher : School of Life Sciences and Technology, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/3bio.2025.7.2.2

Abstract

Kelulut honey, produced by stingless bees (Trigona spp.), is valued for its nutritional and medicinal benefits. However, thermal treatment can alter its physicochemical properties, affecting quality and functionality. This study assessed the impact of heating at 65 °C and 121 °C for 5 minutes on Kelulut honey from seven regions in Indonesia, analyzing changes in color intensity, total dissolved solids (TDS), solubility, viscosity, water content, hydroxymethylfurfural (HMF), and acidity. At 65°C, solubility improved (e.g., Garut: 22.7 → 84.7) and TDS increased (Bogor: 77.0 % → 79.5 %), while 121 °C treatment led to significant HMF accumulation (mean: 25.91 → 40.16 mg/kg) and viscosity fluctuation. Klaten honey uniquely darkened at 121 °C, indicating regional compositional differences. Acidity dropped by up to 21% in Sumedang and Garut, while Bangka maintained stability. This study demonstrates that thermal treatment significantly influences the physicochemical quality of Kelulut honey and underscores the need for region-specific processing guidelines to maintain product integrity for food and medicinal applications, and that HMF, viscosity, and TDS could serve as reliable markers for assessing thermal effects in honey.
Kontribusi Penerimaan Pajak Bumi dan Bangunan Pada Pendapatan Asli Daerah Febriyanto, Dimas; Khasanah, Uswatun
Jurnal Etnik: Ekonomi-Teknik Vol 2 No 2 (2023): ETNIK : Jurnal Ekonomi dan Teknik
Publisher : Rifa'Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54543/etnik.v2i2.156

Abstract

This study aims to analyze how big is the contribution of Land and Building Tax to Regional Original Income in Bekasi Regency, where Land and Building Tax is a potential source of local revenue as a source of financing for government activities in Bekasi Regency as well as regional development and economy. The method used in this research is interview with direct communication techniques either directly or indirectly. Data collection in this qualitative research was collected primary data and secondary data. Primary data through observation and interviews with BAPENDA officials who are directly involved with the collection of Land and Building Tax in Bekasi Regency which is used as information to obtain verbal information regarding their understanding, opinion and involvement in tax collection.
Optimization of Extraction Conditions to Enhance Polyphenol Content and Antioxidant Activity İn Orthosiphon Aristatus Leaves Febriyanto, Dimas; Setyawati, Inda; Ambarsari, Laksmi; Nurcholis, Waras
Molekul Vol 21 No 1 (2026)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2026.21.1.16820

Abstract

ABSTRACT. Orthosiphon aristatus (Java tea) is a medicinal plant known for its high polyphenol content and antioxidant properties. Unlike previous studies that focused solely on solvent type or temperature, this study simultaneously optimizes temperature and pH extraction parameters to achieve maximal bioactive compound recovery. This study aimed to optimize extraction parameters—temperature and pH—to enhance polyphenol yield and antioxidant activity in methanolic extracts of Java tea leaves. Samples were extracted at temperatures ranging from 30 °C to 80 °C (pH 7) and pH levels from 2 to 6 (at room temperature). Total phenolic content (TPC) and total flavonoid content (TFC) were determined to quantify polyphenol levels, and antioxidant activity was evaluated using four complementary in vitro assays: DPPH, ABTS, FRAP, and CUPRAC. The highest TPC (9.68 mg GAE/g DW) and TFC (6.53 mg QE/g DW) were observed at 70 °C and 80 °C, respectively. Maximum antioxidant activities were observed at 70–80 °C and pH 2–3, with peak values of 102.71 µmol TE/g DW (ABTS), 101.9 µmol TE/g DW (FRAP), and 56.12 µmol TE/g DW (CUPRAC). A strong correlation was found between phenolic content and antioxidant capacity. These findings highlight the critical role of extraction conditions in maximizing the biofunctional potential of O. aristatus and support its application in pharmaceutical and nutraceutical formulations. The study provides a scientific basis for developing standardized extraction protocols to improve functional ingredient consistency in herbal product development. Keywords: Antioxidant activity, extraction optimization, Orthosiphon aristatus, pH effect, temperature
Co-Authors Andriyanto, Dimas Inda Setyawati, Inda LAKSMI AMBARSARI Meirila, Salvinia Fara Muhammad Luthfi Waras Nurcholis