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All Journal Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology 3BIO: Journal of Biological Science, Technology and Management Jurnal Sylva Lestari Journal Of Medicine And Health Sciences (Medisci)
Dungani, Rudi
School Of Life Science And Biotechnology, Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Neuroscience Nursing Public Health

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Chemical content in Two Teak Woods (Tectona grandis Linn.F.) that has been used for 2 years and 60 years Enih Rosamah; Fera Ferliyanti; Harlinda Kuspradini; Rudi Dungani; Pingkan Aditiawati
3BIO: Journal of Biological Science, Technology and Management Vol. 2 No. 1 (2020)
Publisher : School of Life Sciences and Technology, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/3bio.2020.2.1.3

Abstract

Teak (Tectona grandis Linn F.) is classified as luxury wood and belongs to the durable wood, resistant to termite and fungal attacks. The purposes of this study were to analyze and compare the chemical content and bioactive compound of teak (T. grandis Linn F.) from Sumedang, West Java based on age of use. This study used teak woods of 2 and 60 years of use. The chemical components analyzed by determination of lignin, extractives, and ash content. Phytochemical compounds were analyzed by color changing of crude acetone extracts. The results showed that the teak wood with 2 years of use possessed lignin of 28.41%; cold water soluble extractives of 4.26%; hot water soluble extract of 5.12%; NaOH 1% soluble extractives of 19, 40; and alcohol:benzene (1:2) soluble extract of 6.21%; while ash content of  0.85%. Meanwhile teak wood after use of 60 years showed the lignin content of 29.82%; cold water  extract of 1.56%; hot water  extract of 2.56%; 1% NaOH soluble extract of 12.30%;  alcohol:benzene (1:2) extract of 4.62%; ash content of 1.36%. The qualitative phytochemical test demonstrated both of teak wood after use of 2 years and use of 60 years contained flavonoids, tannins, triterpenoids, cumarins, and carbohydrates.
A Comparative Study on Quality of Fermented Shrimp Paste (Terasi) of Pelagic Shrimp from Different Locations in Indonesia Henny Helmi; Dea Indriani Astuti; Rudi Dungani; Pingkan Aditiawati
Squalen, Buletin Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 17, No 1 (2022): May 2022
Publisher : Research and Development Center for Marine and Fisheries Product Processing and Biotechnol

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/squalen.631

Abstract

This study aims to determine and compare the quality of Indonesian fermented shrimp paste (terasi) produced from pelagic marine shrimp using a traditional preservation method (fermentation, drying, and salting). The quality of fermented shrimp pastes from different locations in Indonesia (Sungsang district, South Sumatra; Toboali district, Bangka Belitung Islands; Indramayu, West Java; Tegal, Central Java; Madura, East Java; Bontang, East Kalimantan and Sumbawa, West Nusa Tenggara) was determined by evaluating its parameters (i.e., physicochemical, microbiological, and sensory). This study found that the fermented shrimp pastes quality differed among locations due to the processing method used (i.e., fermentation, salting, and drying), not the raw material characteristics, as indicated by the Principal Component Analysis (PCA). The first group (Sumatra and Sumbawa terasi samples) with a similar added salt percentage and length of fermentation resulted in similar pH, salinity, salty taste, and more preferred taste. The second group (Java and Kalimantan terasi samples) with similar lengths of first and second sun-drying resulted in similar chemical compositions such as higher protein content, lipid content, moisture content, total amino acid, and bitter taste. Terasi from Toboali  prepared using Acetes japonicus with 48 h of fermentation produced the most nutritious and preferred taste by the panelists.
Characteristics of Cold-Setting Adhesive Derived from Waste Styrofoam for Bonding Laminated Gmelina (Gmelina arborea) Wood Karliati, Tati; Dungani, Rudi; Hadiyane, Anne; Hidayat, Wahyu; Lubis, Muhammad Adly Rahandi
Jurnal Sylva Lestari Vol. 13 No. 2 (2025): 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.v13i2.1080

Abstract

Developing cold-setting adhesives derived from waste styrofoam (WS) of expanded polystyrene foam for laminated gmelina wood involves innovative recycling of WS into functional adhesives. As a type of thermoplastic polymer, WS can be used as an adhesive at room temperature. In this study, WS was functionalized into cold-setting adhesives through dissolution and cross-linking reaction with methylene diphenyl diisocyanate (MDI) at a concentration of 40% w/v at 60°C. The mixture was then stirred at 200 rpm for 30 minutes. The adhesive is characterized by its ability to be set at room temperature, offering environmental benefits and practical applications in wood lamination. Solids content, gelation time, viscosity, cohesion strength, functional group analysis, morphological features, and curing temperature analysis were performed to characterize the cold-setting adhesives. The WS-MDI-40% had 62.4% solids content, 906.8 mPa.s viscosity, 182.3 Pa cohesion strength, and 197.8 minutes of gelation time at room temperature. The adhesion performance was evaluated in laminated wood using gmelina wood at glue spread rates of 250 and 300 g/m2 and cold-pressed at various durations. The block shear strength value of laminated wood bonded with WS-MDI-40% at 300 g/m2 and cold-pressed for 24 hours was higher than that of other samples, reaching 8.2 MPa, which met the Japanese Agricultural Standard (JAS No. 234) for glued laminated timber, exceeding the minimum requirement of 5.4 MPa. Fourier transform infrared (FTIR) spectroscopy revealed that the cold-setting WS-MDI-40% were cross-linked via urethane linkages (R–NH–COO–R). The free –N=C=O groups could react with the –OH groups of gmelina wood to produce laminated wood during cold-pressing. This study suggested a recycling alternative of WS into a cold-setting wood adhesive for laminated wood, which can be utilized in interior applications. Keywords: adhesive, block shear strength, cohesion strength, cold-setting, gmelina wood
Chemical Compound Of Ethanol Extract From Seluang Malik (Leea Amabilis Veitch Ex Mast) Potential As An Anti-Diabetes Rosamah, Enih; Kusuma, Irawan Wijaya; Arung, Enos Tangke; Wicaksono, Dian Anggoro; Dungani, Rudi
Jurnal Medisci Vol 3 No 1 (2025): Vol 3 No 1 August 2025
Publisher : Ann Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62885/medisci.v3i1.941

Abstract

Background. The Bahau ethnic group in East Kalimantan has employed the roots and leaves of the L. amabilis plant as an anti-diabetic remedy. Thus, scientific verification of this herb is required. Aims. The goal of this study is to examine the bioactive compounds, the anti-diabetic potential, and the chemical composition of L. amabilis ethanolic extracts. Methods. Phytochemical analyses, -amylase enzyme activity assays, DPPH free radical scavenging activity tests, and GC/MS chemical compound analyses were used as experimental methodologies. Result. The findings demonstrated the presence of flavonoids, tannins, steroids, carbohydrates, and carotenoids in the leaf extracts. Alkaloid, tannin, triterpene, and carbohydrates were present in the root extracts. Alkaloid, tannin, triterpene, and carbohydrates were present in the root extracts. The antioxidant and anti-diabetic activity of the L. amabilis leaves extract is higher than that of the root. A significant chemical in the leaves and roots of L. amabilis has been identified as endo-Borneol. Conclusion. A substantial chemical in the leaves and roots of L. amabilis has been identified as endo-Borneol. Endo-Borneol from leaves of L. amabilis showed a chromatographic peak at R. Time of 7.327, area of 2483598, area% of 43.64%, height of 956167, and A/H of 2.60. Nevertheless, the Endo-Borneol chromatographic peak from the root of L. amabilis was found at R. Time of 7.605, area of 889232, area% of 100%, height of 49189, and A/H of 18.08. Implementation. The findings of the study highlight the need for further processing of natural antioxidant and anti-diabetic compounds made from L. amabilis leaves.
Co-Authors Dea Indriani Astuti Enos Tangke Arung, Enos Tangke Fera Ferliyanti Hadiyane, Anne Henny Helmi Irawan Wijaya Kusuma, Irawan Wijaya Karliati, Tati Lubis, Muhammad Adly Rahandi Pingkan Aditiawati Pingkan Aditiawati Rosamah, Enih Rosamah, Enih Wahyu Hidayat Wicaksono, Dian Anggoro