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All Journal Natural Science: Journal of Science and Technology JURNAL KIMIA SAINS DAN APLIKASI Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Biologi Universitas Andalas Majalah Obat Tradisional BERITA BIOLOGI JURNAL BIOLOGI INDONESIA Jurnal Biodjati Jurnal Biologi Tropis JURNAL PENDIDIKAN TAMBUSAI Biota Jurnal Pembelajaran dan Biologi Nukleus Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Unri Conference Series: Community Engagement Bioscientist : Jurnal Ilmiah Biologi Proceeding Biology Education Conference Journal of Community Engagement Research for Sustainability Al-Khidmah Jurnal Pengabdian Masyarakat JURNAL KIMIA SAINTEK DAN PENDIDIKAN Jurnal Karya Abdi Masyarakat Jurnal Abdi Inovatif : Pengabdian kepada Masyarakat Jurnal Pengabdian Masyarakat Bangsa Molekul: Jurnal Ilmiah Kimia
Chairul Chairul
Pusat Penelitian Biologi LIPI, Jl. Ir. H. Djuanda No. 18, Bogor
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Characteristics of Purified Lignin Obtained from Metroxylon Sagu Palm Fronds, Oil Palm Fronds, Cratoxylum arborescens, and Eucalyptus pellita via Soda-Methylanthraquinone Pulping Evelyn, Evelyn; Utami, Syelvia Putri; Yusnimar, Yusnimar; Fermi, Iwan; Chairul, Chairul; Ohi, Hiroshi
Molekul Vol 20 No 3 (2025)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2025.20.3.11016

Abstract

ABSTRACT. Lignin is a valuable material that can be obtained from the black liquor generated during dissolving pulp production from lignocellulosic materials. Lignin can be used to produce biopolymers, fuels, value-added chemicals, and other functional materials. This study investigates the isolation and characterization of lignin from four lignocellulosic biomass sources i.e. Metroxylon sagu palm fronds (SPF), oil palm fronds (OPF), Cratoxylum arborescens, and Eucalyptus pellita using environmentally friendly soda–methylanthraquinone (soda–MAQ, 160 ºC for 1.5 h) pulping followed by acid precipitation with hydrochloric acid (pH 2.0-2.5). The lignin yield varied among the materials (68.3-88.8%), with E. pellita showing the highest recovery. SEM analysis revealed distinct differences in lignin morphology, where E. pellita lignin exhibited a more condensed and homogeneous structure compared to the more fragmented forms from non-wood biomass. FT-IR spectra confirmed the presence of guaiacyl, syringyl, and hydroxyl phenol units in all samples. EDX analysis supported the natural lignin composition, especially in E. pellita, OPF, and C. arborescens. Among the four sources, lignin from E. pellita demonstrated the greatest potential for value-added applications, followed by C. arborescens and OPF. These findings provide valuable insight into lignin recovery from diverse biomass and its suitability for further bioproduct development. Keywords: Biomass, characterization, dissolving pulp, lignin, soda-methylanthraquinone
The Diversity and Diameter Growth Rate of Sprouting-Type Tree in Bukit Pinang-Pinang Forest Permanent Plots Oksari, Ade Ayu; Wanda, Irvan Fadli; Mukhtar, Erizal; Chairul, Chairul
Jurnal Biodjati Vol 4 No 2 (2019): November
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/biodjati.v4i2.4728

Abstract

The process of forest regeneration can take place within a certain period of time. Sprouting is a form of strategy for in adapting to its environment for success in regenerating. The Research on  the diversity and diameter growth rate of sprouting-type tree in Bukit Pinang-pinang forest permanent plots, West Sumatra was carried out from October 2012 to December 2016 in the forest of Bukit Pinang-Pinang, West Sumatra and Herbarium Department of Biology, Universitas Andalas, Padang. This research was conducted using a survey method by census. The parameters analyzed were plant species composition, Morishita Index, Mann-Whitney test, Regression and Correlation test as well as RDGR (Relative Diameter of Growth Rate). The result of experiment was found 40 species of trees sprouting type in forest permanent plot Bukit Pinang-Pinang. The pattern of sprouting type trees distribution in the study locations was found to have a clustered, random and uniform pattern. Relative Diameter Growth Rate (RDGR) of 40 sprouting types of trees in the Bukit Pinang-Pinang forest permanent plots ranged from 0.003 cm/cm/year to 0.0288 cm/cm/year. Altitude did not affect  RDGR of an individual tree sprouting type for 31 years
Strategi Literasi Inklusif Mahasiswa Kukerta Tematik Universitas Riau Kelurahan Tembilahan Hulu : Lapak Literasi Dan Permainan Edukatif di Car Free Day Chairul, Chairul; Afriansyah, Afriansyah; Humairah, Bilqis Armadini; Anjelika, Feblin Isma; Kamilyandri, Kamilyandri; Fadli, M.; Efitra, Mildria; Alzuro, Muhammad Huday; Rasya, Nabila; Maisalma, Putri; S., Tikkos Maruhum; Sitorus, Wahyu; Anggoro, Zulfri Prio
Unri Conference Series: Community Engagement Vol 7 (2025): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.7.469-474

Abstract

Inclusive literacy stems from an awareness of the importance of equality and accessibility in education. This community service program was carried out by students from the University of Riau's Thematic Kukerta program, utilizing Car Free Day activities in Tembilahan Hulu as a public space to develop equitable access to literacy. The aim is for all children from diverse socio-economic backgrounds to have the opportunity to read, learn in an enjoyable manner, and boost their self-confidence through activities such as coloring contests without any discrimination. The methods employed include direct observation, participatory interaction, and the provision of reading materials and educational games. The results of the implementation showed an increase in children's and community enthusiasm for literacy activities in open spaces. Children's participation in reading activities increased significantly each week, and the relationship between students and the local TBM (Community Reading Garden) community grew stronger. This program not only expanded literacy access in public spaces but also provided an example of inclusive literacy strategies that can be adopted in other community service initiatives in the Indragiri Hilir region.
Region-Based Plant Vegetation Productivity in Cibinong Botanical Garden, Bogor Regency Chairul, Chairul; Sunardi, Sunardi; Habinuya, Senriella
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.10863

Abstract

Vegetation productivity in botanical gardens plays a crucial role in carbon sequestration and soil nutrient regulation, yet region-based differences in vegetation performance under ex situ conservation systems remain poorly understood. This study aims to analyze vegetation composition and structure, estimate biomass and carbon stock, and evaluate the influence of dominant species on soil nutrient content across different regional collections in the Cibinong Botanical Garden, Bogor Regency. The research was conducted in seven regional collections (Java–Bali, Sumatra, Kalimantan, Sulawesi, Maluku, Nusa Tenggara, and Papua) using a survey method with 20 × 50 m plots. Tree biomass was estimated using allometric equations, while carbon stock was calculated based on organic carbon content. Soil chemical properties, including organic carbon and phosphorus, were also analyzed. The results showed that the Kalimantan region had the highest biomass and carbon stock, reaching 237.26 tons/ha and 111.51 tons/ha, respectively, largely influenced by the dominance of Pentace sp. In contrast, the Maluku region exhibited the highest soil organic carbon and available phosphorus, despite having lower biomass values. These findings indicate that vegetation productivity is not solely determined by biomass accumulation, but also by species composition, stand structure, and soil nutrient dynamics. This study highlights the importance of region-based vegetation management in botanical gardens to optimize carbon storage and maintain soil fertility under ex situ conservation systems.
Composition and Structure in the Social Forestry Area Protected Forest Nagari Manganti Kecamatan Sumpur Kudus, Kabupaten Sijunjung Marqfirokh, Ramadhana; Chairul, Chairul; Mukhtar, Erizal
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.11169

Abstract

The Social Forestry Area of the Nagari Manganti Protected Forest exhibits high vegetation diversity and the information on vegetation structure in this area remains limited. This study aims to analyze vegetation composition and structure across different growth stages, namely trees, saplings, and understory vegetation, as a scientific basis for sustainable forest management and conservation strategies. The research applied a purposive sampling method, with sample plots systematically established along transect lines. Data for tree and sapling strata were collected using non-destructive sampling methods, while understory vegetation and litter were obtained through destructive sampling. The results indicate that in the tree stratum, Rubiaceae was the dominant family, accounting for 14% of the total composition, consisting of two genera, two species, and six individuals, with Neonauclea sp. exhibiting the highest Important Value Index (IVI) at 26.84%. In the sapling stratum, Rubiaceae, Lauraceae, and Euphorbiaceae functioned as co-dominant families, contributing 18%, 13%, and 10% of the composition, respectively, with Litsea sp. recording the highest IVI at 22%. In the understory stratum, Rubiaceae was the most dominant family (36%), followed by Sapotaceae (11%) and Myrtaceae (10%), while Saraca sp. showed the highest IVI at 40.7%. Therefore, efforts to protect large-diameter trees need to be prioritized  because they play an important role in carbon storage and ecosystem stability. They also maintain dominant species and are used in vegetation rehabilitation and enrichment activities, especially in landslide-prone areas and riverbanks.
Co-Authors , Deviona, , Ade Ayu Oksari Afriansyah Afriansyah Agrina, Agrina Alzuro, Muhammad Huday Amanda, Falencia Mauri ANDRIA AGUSTA Anggoro, Zulfri Prio Anjelika, Feblin Isma Annisa, Syarifah Sari Apriliani, Prapita Ardesta, Ribbi Sukma Armaini, Armaini Arofi, Habib Asral, Asral Astrandana, Yudi Besri Nasrul Br. Silaban, Nesia Rachel Lina Dahelmi Dahelmi Dahlan Tampubolon Darliansyah, Danny Desi Heltina Dewi Kusrini DEWI WULANSARI Dirgantara, Doni Ari Drastinawati Drastinawati, Drastinawati Efitra, Mildria Emelda, Retta Emma Sri Kuncari Erizal Mukhtar EVELYN EVELYN Fadhlan, Adli Fauziah Syamsi Febiani, Hartika Febrialismanto, Febrialismanto Febriamansyah, Thoriq Alfath Febriansyah, Beni Fermi, Iwan Filda, Aiska Fitria Fitria Geovana, Savira Geovani Meiwanda Ginting, Theresia Ellyandra Destri Gunawan Tabrani Habinuya, Senriella Hasibuan, Muhammad Ilham Febrian Mahodum Hendra, Alfino Hengki Firmanda Hijran, Muhammad Hafiyyan Naufal Humairah, Bilqis Armadini Indra Lesmana Indriana, Hanifah Irvan Fadli Wanda Izmiarti Izmiarti, Izmiarti Kamilyandri, Kamilyandri Karimi, Kasman Khairunnisa, Syakira Nada Khoirul Amru Nst, Khoirul Amru Komalasari Komalasari Kurniawan, Abdy Kusbiantoro, Sigit Lia Nazliana Nasution M. Fadli M. Idris Mairawita, Mairawita Maisalma, Putri Maria Peratenta S, Maria Peratenta Maria Peratenta Sembiring Marpaung, Masdalena Marqfirokh, Ramadhana Marzuki, Salman Miftahul Jannah Mildawati Mildawati Muchtar, Erizal Muh Wawan Junuansyah, Muh Wawan Muhammad Furqan, Muhammad Najah, Muthiya Safinatun Nelvia Nelvia Ningsih, Lisa Septia Nurainas Nurainas Nurwijayanti Nuryanti, Lidya Ohi, Hiroshi Pertiwi, Vera Presi, Familindo Putri, Alivia Hardana Putri, Novia Anas Radith Mahatma Rahimmi, Anna Fithra Rahmah, Yulia Rasya, Nabila Rianti, Rianti Ristia Ningsi, Maya Rohaya, Rohaya Romi Kurniadi S., Tikkos Maruhum Saefudin Saefudin Safitri, Nadira Sakutteri, Riza Salsabilla, Dhiyya Sandy, Athifah Faradilla Satria, Fitra Sayyidhani, Muhammad Hisna Sefmaliza, Rizka Serly Marselina Arifin, Serly Marselina Silaban, Kardiman Silvia Reni Yenti Simanjuntak, Billy Oktavianus Simanjuntak, Tagonna Serasi Asnita Sinaga, Raihan Daffansyah Sitinjak, Jufri Suanto Sitompul, Diantika Elena Sitorus, Wahyu Sofnie M Chairul Sofnie Marusin Soleh Kosela Solfiyeni Solfiyeni Sri Budi Sulianti, Sri Budi Sri Endang Kornita Sri Rezeki Muria Sunardi Sunardi Suwirmen, Suwirmen SYAIFUL BAHRI Syamsuardi Syamsuardi Syelvia Putri Utami Tasman, Annaya Qamara Tesri Maideliza Tibrani Tibrani, Tibrani Tri Murningsih, Tri Triani, Leni Villarul, Trya Nungky Wahyu Hidayat Wahyu, Pri Widodo, Prio Wilson Novarino Wulandari, Siti Rahmi Indri Wulandari, Zarah Ayu Yasminto, Habib Maulana Yasra, Firham Yaumil Mutia Akhir, Yaumil Mutia Yayan Setiawan, Yayan Yelmida Azis Yuanita, Mira Yuliana Yuliana Yulianda, Aldi Yuliasri Jamal Yusnimar Sahan Zahtamal Zahtamal Zainul, Zuherti Zulaspita, Witri Zulfansyah Zulfansyah Zultiniar, Zultiniar