Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal Jurnal Media Informatika Jurnal Sylva Lestari
Wahyuningrum, Maeda
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Computer Science & IT Earth & Planetary Sciences Energy Environmental Science Materials Science & Nanotechnology

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
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.
Co-Authors Dyah Safitri Lubis, Muhammad Adly Rahandi Manggar Arum Aristri Maulana, Sena Rita Kartika Sari Sari, Ratih Afrida Lismana Zahra, Rima Adzra