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All Journal Jurnal Media Informatika Jurnal Sylva Lestari Molekul: Jurnal Ilmiah Kimia
Wahyuningrum, Maeda
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Energy Environmental Science Materials Science & Nanotechnology

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Effectiveness of Different Extraction Techniques on the Yield and Antityrosinase Activity of Merbau (Intsia bijuga (Colebr.) Kuntze) Wood Extract Sari, Ratih Afrida Lismana; Sari, Rita Kartika; Safitri, Utami Dyah; Aristri, Manggar Arum; Wahyuningrum, Maeda; Lubis, Muhammad Adly Rahandi
Jurnal Sylva Lestari Vol. 13 No. 3 (2025): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i3.1140

Abstract

This study employed various extraction techniques to determine the yield, phytochemical profile, and antityrosinase activity of merbau wood (Intsia bijuga (Colebr.) Kuntze) extracts. The extraction techniques consisted of two factors: the type of extraction methods (conventional maceration – CM, ultrasound-assisted extraction – UAE, and magnetic stirrer – MS) and the number of extraction repetitions (first repetition – F1, second repetition – F2, and third repetition – F3). The interaction of the extraction methods and the number of extractions affects the extraction yield, antityrosinase activity, and its phytochemical profile. Merbau wood extracted using the UAE-F1 extraction method resulted in the highest yield (13.38%). In contrast, the UAE-F3 extract showed the strongest antityrosinase activity (IC50 value of 1.548 ppm) and the highest total phenol content (692.86 mg/g AGE). Fourier transform infrared analysis of the F1 extract showed that all samples contained the same functional groups, namely C=C (1600–1475 cm-1) and O-H (3800–3000 cm-1), indicating structural similarity among the extracts. Merbau wood extraction using the UAE method, both in the first, second, and third extractions, produced the highest yield, antityrosinase activity, and total phenol content of the extract compared to the CM and MS extraction methods. Keywords: antityrosinase activity, Intsia bijuga, maceration, total phenolic content, ultrasound-assisted extraction
Karakteristik Biobriket Arang Campuran Limbah Batang Singkong dan Kayu Kaliandra pada Berbagai Variasi Komposisi Murda, Rio Ardiansyah; Wahyuningrum, Maeda; Zahra, Rima Adzra; Maulana, Sena
Jurnal Media Informatika Vol. 6 No. 3 (2025): Jurnal Media Informatika
Publisher : Lembaga Dongan Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55338/jumin.v6i3.6583

Abstract

Penelitian ini bertujuan untuk menganalisis karakteristik biobriket arang dari campuran limbah batang singkong dan kayu kaliandra pada variasi komposisi 0:100, 25:75, 50:50, 75:25, dan 100:0 (% berat). Pembuatan biobriket dilakukan melalui proses pengeringan, pengarangan, pengayakan ukuran 40–60 mesh, pencampuran dengan 5% perekat tepung kanji, pencetakan menggunakan kempa hidrolik, dan pengeringan. Karakterisasi dilakukan terhadap kerapatan, kadar air, kadar abu, kadar zat terbang, karbon terikat, nilai kalor, dan laju pembakaran. Hasil pengujian menunjukkan bahwa pencampuran limbah batang singkong dan kayu kaliandra mampu memperbaiki mutu biobriket. Komposisi S50K50 memberikan hasil terbaik dengan nilai kerapatan 0,40 g/cm³, kadar air 3,65%, kadar abu 7,71%, zat terbang 26,27%, karbon terikat 66,01%, nilai kalor 7164 kal/g, dan laju pembakaran 0,09 g/menit. Seluruh komposisi memenuhi standar SNI 01-6235-2000 dan EN 1860-2-2005, namun hanya beberapa komposisi yang sesuai dengan standar GOST 7657-84. Nilai zat terbang masih relatif tinggi sehingga belum memenuhi batas standar SNI, tetapi secara keseluruhan campuran ini menunjukkan potensi tinggi sebagai bahan bakar biomassa alternatif berbasis limbah pertanian.
Evaluation of Pyrolysis Temperature and Time on The Quality Improvement of Calliandra Wood Charcoal Briquettes as An Alternative Energy Source Murda, Rio Ardiansyah; Pasaribu, Try Vista Ulina Br; Wahyuningrum, Maeda; Zen, Muhammad Rizky; Maulana, Sena; Rinaldi, Nino; Maulana, Muhammad Iqbal; Munawaroh, Khoryfatul; Lizardi, Fathi; Faedloni, Akbar Ash Shiddiqi
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.2026.21.1.14411

Abstract

ABSTRACT. Calliandra (Calliandra calothyrsus) wood is a promising biomass feedstock due to its abundance and high calorific value. This study investigated the effects of pyrolysis temperature (400 °C and 500 °C) and residence time (30 and 60 minutes) on the quality of calliandra charcoal briquettes. Biomass was carbonised, mixed with 15% cassava starch binder, pressed, and oven dried. The briquettes were evaluated for yield, density, moisture, ash, volatile matter, fixed carbon, calorific value, combustion rate, and structural changes. Results showed that all parameters except yield were significantly influenced by temperature and time. FTIR analysis revealed increased aromatisation at higher pyrolysis conditions, while XRD indicated reduced cellulose crystallinity and the emergence of calcite and silica phases. The briquettes exhibited densities of 0.62–0.63 g/cm³, moisture contents of 2.14–2.73%, ash 3.55–4.91%, volatile matter 16.32–25.11%, fixed carbon 68.60–76.63%, calorific values 7,856–7,978 cal/g, and combustion rates 0.08–0.09 g/min. The condition of 400 °C for 30 minutes offered the most balanced performance, while 500 °C for 60 minutes yielded the highest carbonisation and energy content. These findings highlight that moderate pyrolysis conditions can produce efficient, high-quality briquettes with low energy input. Keywords: Biomass, calliandra wood, energy, pyrolysis, wood charcoal briquettes
Co-Authors Dyah Safitri Faedloni, Akbar Ash Shiddiqi Khoryfatul Munawaroh Lizardi, Fathi Lubis, Muhammad Adly Rahandi Manggar Arum Aristri Maulana, Muhammad Iqbal Maulana, Sena Nino Rinaldi Pasaribu, Try Vista Ulina Br Rita Kartika Sari Sari, Ratih Afrida Lismana Zahra, Rima Adzra Zen, Muhammad Rizky