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All Journal Tengkawang : Jurnal Ilmu Kehutanan Jurnal Ilmu dan Teknologi Kayu Tropis ULIN: Jurnal Hutan Tropis Jurnal Ilmiah Manuntung: Sains Farmasi dan Kesehatan
Isna Yuniar Wardhani
Fakultas Kehutanan Universitas Mulawarman
Agriculture, Biological Sciences & Forestry Chemistry Environmental Science Immunology & microbiology Medicine & Pharmacology Nursing Public Health

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Penampilan Kayu Kelapa (Cocos nucifera Linn) Bagian Dalam yang Dimampatkan Performance of Densified Inner-Part of Coconut Wood (Cocos nucifera Linn) Isna Yuniar Wardhani; Surjono Surjokusumo; Yusuf Sudo Hadi; Naresworo Nugroho
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 4, No 2 (2006): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (231.01 KB) | DOI: 10.51850/jitkt.v4i2.277

Abstract

The inner-part of coconut wood has low to medium density, which have not been utilized yet optimally as construction material. The purpose of this study was to improve the properties of inner-part of coconut wood by densification, such as it can be considered as a substitute of wood. Pre-treatments were steaming (a1) and boiling (a2) at 120°C for 15 minutes, and pressing temperature were 150°C (b1) and 175°C (b2). Deformation targets were 10% (c1), 20% (c2) and 30% (c3) from the initial thickness. The results indicated that the treatments did not affect to some of the densified wood properties. The appearance of panel surface was smooth and shine, but darker than that of solid. The increasing of density was 4.43 ~ 27.21% with strain recovery of 0.17 ~ 0.52 after soaking in water for 24 hours at room temperature.
Distribusi Kandungan Kimia Kayu Kelapa (Cocos nucifera L) Distribution of Chemical Compounds of Coconut Wood (Cocos nucifera L) Isna Yuniar Wardhani; Surjono Surjokusumo; Yusuf Sudo Hadi; Naresworo Nugroho
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 2, No 1 (2004): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.698 KB) | DOI: 10.51850/jitkt.v2i1.313

Abstract

Within a tree from base to top (longitudinal) and dermal to core (lateral), the chemical compounds of wood such us celluloses, lignin, holocelluloses, ash content and extractives are different. The distribution should be known to process the wood, including coconut wood, easily and to utilize the wood optimally. The objective of this study was to determine the distribution of chemical compound of coconut wood within a tree.  The analysis was conducted according to TAPPI Standard with three replications for each sample. Average values and graphs were use to analyze the results.The results indicated that coconut wood contains of wood extractives that soluble in hot water of 3.75 ~ 8.92%; alcohol benzene of1.88 ~ 8.78%; 1% NaOH of 18.76 ~ 33.61%; ash content of 0.75 ~ 4.08%; celluloses of 28.1 ~ 36.55%; holocelluloses of 69.51 ~ 80.07% and lignin of 26.58 ~ 36.35%. From base to top, wood extractives soluble in 1% NaOH increased but in other solutions did not have uniform distributions. Laterally, only holocelluloses and lignin did not have uniform distributions, whereas the others increased from dermal to core
SIFAT FISIKA DAN MEKANIKA KAYU REPEH (Mangifera gedebe Miq.) (Physical and Mechanical Properties of Repeh (Mangifera gedebe Miq.)) Isna Yuniar Wardhani
Tengkawang : Jurnal Ilmu Kehutanan Vol 1, No 2 (2011): JURNAL TENGKAWANG
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jt.v1i2.127

Abstract

Repeh (Mangifera gedebe Miq.) is one of lesser known species that does not utilize optimally yet because of lacking data of this wood species. Repeh wood has been used by rural people in East Kalimantan traditionally as housing material such as wall. The purpose of this research is to determine the fresh moisture content, density and static bending strength of Repeh based on DIN standard. Four logs of Repeh taken from Kutai Kartanegara District as sample and divided into three parts. The data was display by graphic. The result showed that the average of fresh moisture content and density are 102,21% and 0,46 g/cm, whereas MOE is 7428 N/mm and MOR is 51,2 N/mm. According to MOE and MOR, Repeh including to Wood Strength Class IV III and it could be as light construction material and furniture. Keywords: Repeh, fresh moisture content, density, static bending strength
Pengaruh jenis kayu meranti merah (Shorea sp.), sengon (Falcataria moluccana Miq.) dan jati putih (Gmelina arborea Roxb) terhadap kualitas papan semen partikel Handayani, Sri Asih; Yunastain, Yesi; Rindayatno, Rindayatno; Fahmi, Agus Nur; Wardhani, Isna Yuniar; Widiati, Kusno Yuli
ULIN: Jurnal Hutan Tropis Vol 8, No 2 (2024)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32522/ujht.v8i2.16957

Abstract

Tujuan penelitian ini adalah menganalisis perbedaan jenis kayu terhadap sifat fisik dan mekanik papan semen partikel yang dihasilkan. Bahan yang digunakan didalam penelitian ini adalah meranti merah (Shorea spp.), sengon (Falcataria moluccana Miq.) dan jati putih (Gmelina arborea roxb) dengan campuran semen tonasa dan katalisator MgCl2. Pembuatan papan semen ini menggunakkan perbandingan partikel dan semen (3:1) dengan tekanan kempa 30 bar serta analisis data mengunakan RAL dengan 10 ulangan. Penelitian ini mengacu pada standar ISO 8335 (1987), MS 934 (1986) dan BS 5669 (1989) yang meliputi pengujian fisika (kerapatan, kadar air, penyerapan air, dan pengembangan tebal) dan sifat mekanika Modulus of Elasticity (MoE), Modulus of Repture (MoR) dan Internal Bonding Strength (IBS). Papan semen partikel meranti merah mendapatkan nilai terbaik pada pengujian kerapatan, kadar air, penyerapan air, pengembangan tebal, MoE, dan MoR. Pada papan semen partikel sengon mendapatkan nilai terbaik pada pengujian kerapatan, kadar air, penyerapan air, pengembangan tebal, MoE dan MoR.  
AKTIVITAS ANTIOKSIDAN DAN ANTIMIKROBA SARANG BURUNG WALET (Collocalia Fuciphaga) DARI BERBAGAI JENIS KELAS SARANG DAN JENIS BANGUNAN Assegraff , Andi Syahid Khalid; Suwinarti, Wiwin; Wardhani, Isna Yuniar; Budi, Agus Sulistyo; Kusuma, Irawan Wijaya; Arung, Enos Tangke
Jurnal Ilmiah Manuntung Vol 10 No 2 (2024): Jurnal Ilmiah Manuntung: Sains Farmasi Dan Kesehatan
Publisher : Sekolah Tinggi Ilmu Kesehatan Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51352/jim.v10i2.804

Abstract

The community has traditionally utilized the swallow’s nest (Collocalia fuciphaga), an edible bird’s net (EBN), as a component in medicines and cosmetics. Within the cave’s walls lies the environment for the swallow’s nest. The nest’s quality and form are taken into account when determining the nest wallet’s selling price. This study intends to ascertain the possible suppression of the bacteria Staphylococcus sp. and Escherichia sp. activity as well as the antioxidant activity of the swallow’s nest from the nest class formed from wood and concrete construction types. The study was conducted directly on dry, hair- and dirt-free, finely powdered, and dissolved in distilled water swallow nests (Collocalia fuciphaga). Testing for antibacterial activity was conducted. Agar well testing for antibacterial activity was carried out using Mueller Hinton Agar (MHA) and chloramphenicol media as positive controls. Ascorbic acid was used as a positive control while 1,1-diphenyl-2-picrylhydrazyl (DPPH) was tested for its ability to scavenge free radicals. The test findings demonstrated that the swallow (Collocalia fuciphaga) had substantial antioxidant activity against DPPH and that the swallow’s nest (Collocalia fuciphaga) had antibacterial activity against Staphylococcus sp. and Escherichia sp. germs. The swallow’s nest’s (Collocalia fuciphaga) antioxidant and antibacterial properties are specific to different nest classes and building kinds, so they may be utilized as a foundation for thought about raising the selling price of bowls, powders, and crumbles in each form of structure.
Co-Authors Agus Nur Fahmi Agus Sulistyo Budi Assegraff , Andi Syahid Khalid Enos Tangke Arung, Enos Tangke Handayani, Sri Asih Irawan Wijaya Kusuma, Irawan Wijaya Naresworo Nugroho Rindayatno, Rindayatno Surjono Surjokusumo Suwinarti, Wiwin Widiati, Kusno Yuli Yunastain, Yesi Yusuf Sudo Hadi