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( Harisyah MANURUNG ),( Rita Kartika SARI ),( Wasrin SYAFII ),( Umi CAHYANINGSIH ),( Wiwied EKASARI ) 한국목재공학회 2019 목재공학 Vol.47 No.5
This study aimed to determine the antimalarial effect of the Strychnos ligustrina (SLW) wood extracts and to analyze its phytochemicals. The SLW powder samples were macerated with 100% ethanol (E100), 75% ethanol (E75), 50% ethanol (E50), 25% ethanol (E25), and aqueous (A100). The extracts were analyzed by LCMS/MS, and its in-vitro antimalarial activity was tested with Plasmodium falciparum. The results showed that the extract yields of E100, E75, E50, E25, and A100 were 4.3, 5.2, 5.3, 4.7, and 3.6%, respectively. The antimalarial activities of the A100, E25, E50, and E75 extracts were classified as active with IC<sub>50</sub> values of 38.6, 42.6, 42.9, and 43.7 μg/mL, respectively. But, the antimalarial activity of the E100 extract was classified as slightly active with IC<sub>50</sub> values of 87.4 μg/mL. The dominant compounds contained in the extracts of A100, E25, E50, E75, and E100 was the alkaloid compound, namely brucine with relative concentrations of 24.96, 24.55, 21.33, 11.79, and 11.62%, respectively.
Fiber Quality of Seven Mangrove Wood Species
ANDIANTO,Imam WAHYUDI,Rita Kartika SARI,Gustan PARI 한국목재공학회 2024 목재공학 Vol.52 No.4
As an archipelagic country, Indonesia is surrounded by large and small islands. Many mangrove plant species are found along the coasts surrounding large and small islands. Besides their conservation value, mangrove plants provide various benefits, including the use of their leaves, fruit, bark, and wood as raw materials in pharmaceutical and other industries. Additionally, mangrove wood is a potential raw material for pulp and paper production. It is essential to study the fiber dimensions of the wood to identify the appropriate characteristics of raw material for pulp and paper. Therefore, in this study, we comprehensively analyzed the differences in the wood fiber dimensions of seven mangrove species from the Indramayu Regency, West Java Province, namely Avicennia alba, Bruguiera gymnorhiza, Bruguiera cylindrica, Hibiscus tiliaceus, Sonneratia ovata, Sonneratia caseolaris, and Excoecaria agallocha. For this analysis, maceration followed the Forest Product Laboratory guidelines, and preparation followed the Sass method. The fiber length, diameter, and lumen diameter were measured using a light microscope. Based on the values of the length and dimension derivatives, the fibers of these mangrove wood species were grouped into quality classes II or III for use as raw materials for the pulp and paper industry. The wood fibers of H. tiliaceus, A. alba, S. caseolaris, and E. agallocha met the quality class criterion II, whereas wood species fibers of B. gymnorhiza, B. cylindrica, and S. ovata met the quality class criterion III.
Arinana ARINANA,Rama Aditya DHARMA,Rita Kartika SARI,Anindya Intan RAHMAWATI,Riki ANDIKA,Dodi NANDIKA 한국목재공학회 2024 목재공학 Vol.52 No.1
Subterranean termite attacks on cajuput (Melaleuca cajuputi) seedling roots were widespread in several of Java’s Perum Perhutani Forest Management Units. This attack was suspected to be related to the chemical components of the cajunput seedling roots. This study was conducted to determine the bioactivity of cajuput seedling root extract as an attractant for the subterranean termite Coptotermes curvignathus Holmgren (Isoptera: Rhinotermitidae). The extraction process was performed according to ASTM D1108-96, and the extract was characterized using gas chromatography-mass spectrometry (GC-MS). Bioactivity testing of the extracts was carried out using attractiveness and no-choice feeding bioassays. The results showed that the average root extraction yield from cajunput seedlings was 4.94%. The attractiveness of the extract solutions at concentrations of 0.50%, 0.75%, and 1.00% were 45.33%, 62.00%, and 74.67%, respectively. The mortality rate of C. curvignathus termites ranged from 9.63% to 24.44%. Cajuput seedling root extract’s lethal concentration 50 was 2.45% (non-toxic). GC-MS analysis showed that the extract contained linoleic acid, which has the potential to attract insects.
Umi CAHYANINGSIH,Siti Sa’diah,Wasrin SYAFII,Rita Kartika SARI,Abdul Jafar Maring,Arifin Budiman Nugraha 대한기생충학ㆍ열대의학회 2022 The Korean Journal of Parasitology Vol.60 No.5
The development of drug resistance is one of the most severe concerns of malaria control because it increases the risk of malaria morbidity and death. A new candidate drug with antiplasmodial activity is urgently needed. This study evaluated the efficacy of different dosages of aqueous extract of Strychnos ligustrina combined with dihydroartemisinin and piperaquine phosphate (DHP) against murine Plasmodium berghei infection. The BALB/c mice aged 6-8 weeks were divided into 6 groups, each consisting of 10 mice. The growth inhibition of compounds against P. berghei was monitored by calculating the percentage of parasitemia. The results showed that the mice receiving aqueous extract and combination treatment showed growth inhibition of P. berghei in 74% and 94%, respectively. S. ligustrina extract, which consisted of brucine and strychnine, effectively inhibited the multiplication of P. berghei. The treated mice showed improved hematology profiles, body weight, and temperature, as compared to control mice. Co-treatment with S. ligustrina extract and DHP revealed significant antimalarial and antipyretic effects. Our results provide prospects for further discovery of antimalarial drugs that may show more successful chemotherapeutic treatment.
Muhammad Iqbal Maulana,Marwanto Marwanto,Soleh Muhamad,Sena Maulana,Rita Kartika Sari,Wahyu Hidayat,Deded Sarip Nawawi,Siti Nikmatin,Nam-Hun Kim,Fauzi Febrianto 강원대학교 산림과학연구소 2019 강원대학교 산림과학연구소 학술대회 Vol.2019 No.09
The objective of this study was to evaluate the physical and mechanical properties of mangium wood and betung bamboo hybrid oriented strand board (OSB) with steam treatment. Mangium (Acacia mangium Willd.) and betung bamboo (Dendrocalamus asper (Schult.F) Backer ex. Heyne) strands were steamed at 126ºC temperature and 0.14 MPa pressure for 1 hour. Hybrid OSB with 30 × 30 × 0.9 cm³ size and 0.7 g.cm-3 target density were prepared from mangium strands as face layers and bamboo strands as core layer. Phenol formaldehyde adhesive content of 8% and shelling ratio of 25/50/25 were used. The evaluation of hybrid OSB properties were refering to the JIS A 5908-2003 standard. The results showed that the steam treatment improves the physical and mechanical properties of the resulting OSB hybrids. Observed physical and mechanical properties of hybrid OSB meet the requirements of CSA 0437.0 (Grade O-1) standard. Steam treatments reduce the hemicellulose and extractives content of mangium and betung bamboo strands.
( Muhammad Iqbal Maulana ),( Rio Ardiansyah Murda ),( Byantara Darsan Purusatama ),( Rita Kartika Sari ),( Deded Sarip Nawawi ),( Siti Nikmatin ),( Wahyu Hidayat ),( Seung Hwan Lee ),( Fauzi Febrianto 한국목재공학회 2021 목재공학 Vol.49 No.1
The objective of this study was to investigate the effect of alkali-washing with different sodium hydroxide concentrations on the chemical compositions of steam-treated Betung bamboo strand. Strands were subjected to steam treatment at 126 ºC for 1 h under 0.14 MPa pressure and followed by washing with 1-5% sodium hydroxide solution for 30 sec. The alteration of structural and non-structural chemical components content of bamboo strands was evaluated. Steam and washing treatments with various concentrations of sodium hydroxide solution considerably reduced the extractive content of bamboo strands, and the cell wall chemical components of the strand in the small degree. FTIR analysis showed noticeable changes in peaks related to hemicellulose and lignin. The relative crystallinity increased significantly after steam and washing treatment with sodium hydroxide up to 3% concentration. SEM Images showed smooth and clean strands surface after washing with 3% sodium hydroxide.
Fauzi Febrianto,Muhammad Iqbal Maulana,Marwanto Marwanto,Deded Sarip Nawawi,Siti Nikmatin,Rita Kartika Sari,Wahyu Hidayat,Denni Prasetia,Nam Hun Kim 강원대학교 산림과학연구소 2021 강원대학교 산림과학연구소 학술대회 Vol.2021 No.10
The objective of this study was to determine the effect of delignification on the properties of bamboo cellulose nanofibers and its nanocomposites. Milled bamboo powder (150-200 mesh) was delignified with sodium chlorite-acetic acid (SC-AA) treatment in reactions 1, 2, 3, and 4 cycles. The delignified bamboo fibers were then fibrillated using wet disk mill (Supermasscolloider MKCA6-2, Masuko Sangyo, Japan). The morphology, functional groups, and crystalline properties of the fibrillation products were characterized. Bamboo cellulose nanofibers and polyvinyl alcohol (PVA) matrix were used to prepare nanocomposites. The physical, optical, and mechanical properties of the nanocomposite were evaluated. The results showed that lignin content of ampel bamboo decreased 12% to 83% after SC-AA delignification. The diameter of ampel bamboo cellulose nanofibers decreased with increasing delignification. The Fourier Transform Infra-Red (FTIR) spectra confirmed that there was a decrease in lignin content although there were still residues left on the cellulose nanofibers. The crystallinity and atomic size of the crystals decreased with increasing delignification reaction. The water absorption and solubility of nanocomposites decreased with increasing delignification reaction on ampel bamboo. Ampel bamboo cellulose nanofibers with 4 times delignification had the highest nanocomposite transparency. Nanocomposite strength increased with increasing delignification.
Effects of Steam Treatment on Physical and Mechanical Properties of Bamboo Oriented Strand Board
Sena Maulana,Imam Busyra,Adesna Fatrawana,Wahyu Hidayat,Rita Kartika Sari,Ihak Sumardi,I Nyoman Jaya Wistara,Seung Hwan Lee,Nam Hun Kim,Fauzi Febrianto 한국목재공학회 2017 목재공학 Vol.45 No.6
The objective of this study was to evaluate the properties of bamboo oriented strand board (B-OSB) from an-dong (Gigantochloa psedoarundinacea) and betung (Dendrocalamus asper) with and without steam treatment. Strands were steam-treated at 126℃ for 1 h under 0.14 MPa pressure. The extractive content of bamboo strands before and after steam treatment were determined according to a standard (TAPPI T 204 om-88). Three-layer B-OSB with the core layer perpendicular to the surface and back layers were formed and binded with 8% of phenol formaldehyde (PF) resin with the addition of 1% of wax. The evaluation of physical and mechanical properties of the boards were conducted in accordance with the JIS A 5908:2003 standard. The results showed that steam treatment of bamboo strands significantly reduced the extractive content. Steam treatment tended to increase the dimensional stability and mechanical properties of B-OSB from andong and betung. The results showed that the dimensional stability and bending strength of B-OSB from betung was higher than those of andong. The internal bond strength of B-OSB from andong was higher than betung owing to a greater amount of extractives dissolved during the steam treatment.