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All Journal Jurnal Ilmu Pertanian Indonesia Jurnal Silvikultur Tropika (JST) Jurnal Sain Veteriner Indonesian Journal of Chemistry Biosaintifika: Journal of Biology & Biology Education Jurnal Ilmu dan Teknologi Kayu Tropis Jurnal Sylva Lestari Jurnal Ilmu Kehutanan
Rita Kartika Sari
Departemen Hasil Hutan, Fakultas Kehutanan, Institut Pertanian Bogor Kampus IPB Darmaga Bogor, 16680
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Environmental Science Materials Science & Nanotechnology Social Sciences Veterinary

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Phytochemical Profile of Rhizophora apiculata, Bruguiera gymnorhiza, and Bruguiera cylindrica for Wood Identification Andianto; Wahyudi, Imam; Sari, Rita Kartika; Pari, Gustan; Prayogo, Yanico Hadi
Jurnal Sylva Lestari Vol. 12 No. 2 (2024): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v12i2.884

Abstract

Identification of wood species that are difficult to distinguish from their anatomical structure can be done through phytochemical (extractive substance) profiling. This research aimed to analyze the phytochemical profile as a sorter for three species of mangrove wood from Indramayu and Cilacap Regencies, Indonesia, using the liquid chromatography-mass spectrum. The phytochemical markers of taxonomic were the dominant compounds only found in one wood species. The results showed that the three types of wood are dominated by phytochemicals dissolved in ethanol. The results of LCMS analysis of the ethanol extract showed that the phytochemical markers were triterpenoid, flavonoid, and fatty acyls glycoside groups for Rhizophora apiculata, steroid and naphthalene groups for Bruguiera gymnorhiza, and alkaloid as well as fatty amide group for Bruguiera cylindrica. The dominant compounds that characterize these can be used in sorting between mangrove wood species. Keywords: characterizer, compound, mangrove, phytochemicals
Antidiabetic Activities of Agarwood (Aquilaria malaccensis) Leaf Extracts via Enhanced Insulin Secretion in BRIN-BD11 Pancreatic Beta-Cells Prayogo, Yanico Hadi; Sari, Rita Kartika; Hamidi, Zikri; Syafii, Wasrin; Harlina, Eva; Prasetyo, Bayu Febram
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.v13i3.1197

Abstract

Agarwood leaves (Aquilaria malaccensis), a non-timber forest products, shows significant potential as a source of antidiabetic compounds. This study aims to evaluate the antidiabetic activity of agarwood leaves and their cytotoxicity on pancreatic beta-cells, as well as predict their compound bioactivity through an in silico approach. The leaves were extracted using ethanol, water, and a mixture of ethanol–water with the assistance of ultrasound irradiation. The extracts were then tested in vitro for their antidiabetic potential by assessing their ability to inhibit the alpha-glucosidase enzyme and their effect on insulin secretion, as well as their cytotoxicity on BRIN-BD11 pancreatic beta-cells. The phytocompounds in the extract were identified using liquid chromatography-mass spectrometry, and their binding behavior was studied by in silico molecular docking. Among the three, the ethanol–water extract showed the highest extraction yield. Cytotoxicity assays revealed that the ethanol–water extract was cytotoxic at high concentrations (1000 µg/mL), but safe at lower concentrations. The alpha-glucosidase inhibition was relatively weak. Nevertheless, the extracts significantly stimulated insulin secretion in BRIN-BD11 cells up to fivefold compared to untreated cells. In silico studies indicated that xanthone glycoside, flavonoid glycoside, and coumarin compounds exhibit strong binding affinities to multiple insulin-secretion-related proteins. These findings suggest that agarwood leaf extract, particularly ethanol–water extract, possesses promising antidiabetic activity through an insulinotropic mechanism. Keywords: agarwood, alpha-glucosidase, insulinotropic, molecular docking
Enhancing Pine Resin Productivity through Sulfuric Acid–Modified ETRAT Stimulants under Operational Conditions in Pinus merkusii Stands Gunawan Santosa; Juang Rata Matangaran; Ryan Darmawan; Darwis Alamsyah; Rita Kartika Sari
Jurnal Sylva Lestari Vol. 14 No. 2 (2026): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i2.1454

Abstract

Pine resin is an important non-timber forest product in Indonesia; however, the productivity of Pinus merkusii tapping remains relatively low and has not yet met industrial demand. This study evaluated the effect of a sulfuric acid–modified ETRAT stimulant on pine resin productivity under operational tapping conditions in Perum Perhutani forests in Central Java, Indonesia. Resin tapping was conducted on 160 trees distributed across four age classes (AC III–VI) using a randomized block design with four stimulant treatments: ETRAT, ETRAT + 5% H2SO4, ETRAT + 10% H2SO4, and a control without stimulant. Resin yield was monitored over 10 consecutive tapping periods, with intervals of 3 days. Resin productivity exhibited temporal variation across tapping periods, with generally lower yields during the initial tapping periods, increasing toward the intermediate periods, and declining slightly thereafter; however, differences among tapping periods were not statistically significant. Stimulant treatment significantly affected resin productivity. The highest productivity was achieved with ETRAT + 5% H2SO4 (11.29 g/quarre/day), representing an approximately 78% increase compared to the control (6.34 g/quarre/day). The addition of 10% H2SO4 did not further improve productivity, suggesting potential physiological stress associated with excessive acidity. Productivity also differed among age-class blocks, with the highest values observed in AC V and AC VI, although these differences likely reflected combined stand-level effects, including stand density and site conditions.  These findings demonstrate that low-concentration sulfuric acid modification can enhance the operational performance of organic stimulants by improving ethylene-mediated resin flow while maintaining tree physiological tolerance. These results provide practical implications for improving pine resin productivity in tropical production forests under operational management conditions. Keywords: age class, ETRAT, pine resin productivity, stimulants, sulfuric acid
Characteristics of Polyurethane Cross-Laminated Timber Made from a Combination of Pine and Coconut Muhammad Iqbal Adi Baskara; Yusuf Sudo Hadi; Muhammad Adly Rahandi Lubis; Muhammad Iqbal Maulana; Rita Kartika Sari; Fauzi Febrianto; Wahyu Hidayat
Jurnal Sylva Lestari Vol. 11 No. 2 (2023): May
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v11i2.691

Abstract

The objective of this study was to assess the properties of cross-laminated timber (CLT) fabricated from the combination of Sumatran pine (P) and coconut trunk (C) bonded with polyurethane adhesive. The basic properties of raw materials and adhesives were characterized. The CLT panels’ length, width, and thickness are 100 cm by 30 cm by 3.6 cm, respectively. Three-layer CLT was made with 4 combinations of face/core/back lamina, i.e., PPP, CCC, PCP, and CPC, which are arranged perpendicular to each other. The laminae were bonded using PU adhesive on 160 g.m-2 glue spread. The CLT’s delamination and wood failure percentages (WFP) were assessed following the JAS 3079 (2019) standard. The study’s results demonstrated that the PU adhesive employed in this investigation could curl ideally at 30°C for 200 min. Solid pine and coconut’s physical and chemical characteristics differed, but their wettability to polyurethane adhesives was identical. Hybrid pine CLT has greater attributes compared to single pine CLT. Single coconut CLT, on the other hand, offers better features than hybrid coconut CLT. All CLT samples failed to fulfil the JAS 3079 (2019) requirement for delamination (=< 10%) and WFP (>= 90%). Keywords: Coconut trunk, cross-laminated timber, layer combination, pine wood, polyurethane adhesive
Co-Authors . Siswoyo A.A. Ketut Agung Cahyawan W Adesna Fatrawana Agus Ari Subagio Agus Hikmat Anak Agung Istri Sri Wiadnyani Andianto Anne Carolina Apri Heri Iswanto Arinana Arinana Bayu Febram Prasetyo D R Agungpriyono Darwis Alamsyah Deded Sarip Nawawi Desi Melianti Devi Armilasari Dewi R Agungpriyono Dewi R Agungpriyono Dudi Tohir Dyah Safitri Edhi Sandra Effendi Tri Bahtiar Ervizal A.M. Zuhud Eva Harlina Evie Nihayah Fauzi Febrianto Fitrianum, Fadilah Gunawan Santosa Gustan Pari Gustan Pari Gustan Pari Hamidi, Zikri Himmi, Setiawan Khoirul I Nyoman Jaya Wistara I Wayan Darmawan Idris N Iskandar IETJE WIENTARSIH Imam Wahyudi Indrawan, Imam Wahyudi Ina Winarni, Ina Irdika Mansur Irmanida Batubara Istie Rahayu Itje Wintarsih Izza Firdausi Hadiyanto Juang Rata Matangaran Juliasman Juliasman Kholiyah Kholiyah Kosei Yamauchi Kurnia Sofyan L N Sutardi Laela N. Anisah Laela Nur Anisah Livia T Amalia Lubis, Muhammad Adly Rahandi Manggar Arum Aristri Mardho Tillah Mardho Tillah Mardho Tillah, Mardho Maulana, Muhammad Iqbal Muhammad Adly Rahandi Lubis Muhammad Hanafi Muhammad Iqbal Adi Baskara Muhammad Iqbal Maulana Naresworo Nugroho Nopen Meisaroh Nugraha, Arifin Budiman Nur Azizah Prayogo, Yanico Hadi Rahmawati, Anindya Intan Rahmi Utami Regita Pramesti Riki Andika Romi Irka Putra Ryan Darmawan S Priambodo Saat Egra Salina Febriany Sari, Ratih Afrida Lismana Silmi Mariya Siti Aisyah Siti Maemunah Siti Sa&#039;diah Siti Sa'diah Sri Familasari Subangkit, Mawar Syamsul Arifin Tengku Muhammad Renzy Hariz Tohru Mitsunaga Umi Cahyaningsih Vetnizah Juniantito Wahyu Hidayat Wahyuningrum, Maeda Wahyuningrum, Maeda Wasrin Syafii Wilis Wiryawan Yanico Hadi Prayogo Yusuf Sudo Hadi