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All Journal Jurnal Ilmu Pertanian Indonesia Jurnal Ilmu dan Teknologi Hasil Hutan Jurnal Penelitian Hasil Hutan Jurnal Ilmu dan Teknologi Kayu Tropis Jurnal Penelitian Hasil Hutan International Journal of Recent Technology and Applied Science (IJORTAS) Jurnal Ilmiah STOK Bina Guna Medan Wood Research Journal : Journal of Indonesian Wood Research Society Wood Research Journal : Journal of Indonesian Wood Research Society Jurnal Sylva Lestari Makara Journal of Technology Prosiding University Research Colloquium Jurnal Penelitian Hasil Hutan

I Wayan Darmawan

Departemen Teknologi Hasil Hutan, Fakultas Kehutanan, Institut Pertanian Bogor, Kampus IPB Dramaga, Bogor 16680

Author-ID : 2450863

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology

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The Effect of Jabon Veneer Quality on Laminated Veneer Lumber Glue Bond and Bending Strength Istie Rahayu; Wayan Darmawan; Naresworo Nugroho; Remy Marchal
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 2 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Jabon (Anthocephalus cadamba) is a fast growing wood species widely planted by community in Indonesia. Jabon has large percentage of juvenile wood which affect its veneer quality. This research objective were to determine the effects of wood juvenility and pretreatment on lathe checks, surface roughness and contact angle of the 3.00 mm rotary-cut jabon veneer and to analyze the impact of lathe checks frequency on the LVL glue bond and bending strength. Jabon logs were subjected to boiling in 75 °C water for4 h. Then they were peeled to produce 3.00 mm veneers in thickness. Frequency, length and depth of lathe checks were measured per 10 cm veneer length by using optical microscope. Laminated veneer lumber (20x20x500) mm3 were made from 7-ply of jabon veneers by using Poly Vinyl Acetate (PVAc) as adhesive. Glue bond strength and bending strength were measured by UTM Instron. The results showed lathe check (frequency, length and depth), surface roughness and contact angle were influenced by juvenility. Glue bond strength, Modulus of Elasticity (MOE) and Modulus of Rupture (MOR) of jabon LVL decreased as frequency of lathe check increased.

Characteristics of Sengon Rotary-Cut Veneer Abigael Kabe; Wayan Darmawan; Muhammad Y Massijaya
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 2 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Fast growing sengon is largely rotary-cut to produce veneer for plywood, com-ply and LVL. In order to provide better information on veneer production and utilization, in this study the effects of wood juvenility and veneer thickness on lathe checks of sengon rotary-cut veneer were evaluated. Before veneer manufacturing, the sengon log was boiled at 50 and 75 oC for 4 and 8 h, respectively. The boiled logs were peeled to produce veneer of 1 and 2 mm in thickness. Lathe checks of veneers were measured under an optical video microscope. The rotary-cut veneer was grouped and evaluated separately at every segmented ring of 2 cm from pith to bark. The results showed that wood juvenility and veneer thickness had an important effect on lathe checks for the rotary-cut veneer. In general, the number of lathe check of the veneer increases with increasing veneer thickness and increase from pith to bark. Boiling of logs before rotary-cutting could decrease the value of lathe check. The results indicated that boiling of logs at 50 oC for 8 h, and at 75 oC for 4 and 8 h could minimize the number of lathe checks in manufacturing of 1 and 2 mm rotary-cut veneer from juvenile wood sengon.Key words: juvenility, lathe check, Paraserianthes falcataria, rotary-cut veneer, veneer thickness

The Quality of Zephyr Board Made from Oil Palm Brunch (Eleais guenensis Jacq.) Lusita Wardani; Muhammad Y Massijaya; Yusuf Sudo Hadi; Wayan Darmawan
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 2 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The objective of this research was to evaluate the physical, mechanical and durability properties of zephyr board made from oil palm petiole. Urea formaldehyde (UF), phenol formaldehyde (PF) and isocyanate (IC) resins were used to bind zephyrs. Board size produced was (300x300x12) mm3, and target density of zephyr board was set at 0.80 g cm-3. The temperature and pressure of hot pressing were set at 120 °C and 25 kg cm-2 for 20 min. The result showed that physical and mechanical properties of zephyr board fulfilled JIS A 5908-2003. All board density in this experiment did not reach the density target. The moisture content of zephyr board bonded with IC resin was the lowest compared to zephyr board bonded with UF and PF resins. Over all the mechanical properties of zephyr board bonded with UF resin showed the best result in term of modulus of rupture (MOR), modulus of elasticity (MOE), internal bond (IB), and screw resistant (SR) parameters compared with zephyr board bonded with PF and Isocyanate resins. Zephyr board was classified into I-II class for strength class and I-IV class for resistance against dry and subterranean termites, attack respectively.Key words: durability, mechanical properties, physical properties, resin type, zephyr board

Pengaruh Kondisi Permukaan terhadap Daya Lekat Lapisan Pelindung Andi T. Lestari; I. Wayan Darmawan; Dodi Nandika
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 14, No 1 (2016): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Penelitian ini bertujuan untuk menentukan pengaruh kondisi permukaan kayu jati Perhutani, pinus dan jati rakyat (penampang radial dan tangensial) terhadap daya lekat bahan lapisan pelindung permukaan. Contoh uji diampelas dan diukur tingkat kekasarannya (Ra) menggunakan roughness tester TR200. Water repellent (WR), bahan pengawet, cat dan kombinasinya dilaburkan pada permukaan kayu. Pengujian keterbasahan dilakukan dengan pengukuran sudut kontak (contact angle) antara cairan dan permukaan contoh uji. Sudut kontak tersebut diukur menggunakan Motic Images Plus (MIP) versi 2.0. Nilai sudut kontak statis ditentukan menggunakan program PROC NLIN dari SAS. Nilai Ra bervariasi antara 2,51-5,80 m. Penampang radial memiliki nilai Ra yang lebih kecil dari penampang tangensial. Jati rakyat dan pinus menghasilkan nilai Ra yang lebih tinggi dibandingkan dengan jati Perhutani. WR menghasilkan sifat keterbasahan yang rendah dengan sudut kontak statisnya mencapai 134o. Sifat keterbasahan bahan pengawet tinggi dengan sudut kontak statis 8,92o. Kombinasi antara cat dan WR, serta cat dan bahan pengawet menghasilkan daya lekat yang paling kuat dibandingkan dengan kombinasi antara cat, bahan pengawet, dan WR. Daya lekat lapisan pelindung permukaan kayu jati rakyat relatif sama dengan kayu pinus, namun daya lekat keduanya lebih baik dibandingkan dengan jati Perhutani.

Antiproliferative Activities of Anthocephalus cadamba Extracts on Human Breast Cancer and Cervical Adenocarcinoma Cell Lines Rita K Sari; Devi Armilasari; Deded S Nawawi; Wayan Darmawan; Silmi Mariya
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 1 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The aim of this research was to evaluate the anticancer properties of methanolic extracts from inner bark and wood of jabon (Anthocephalus cadamba). The extracts were investigated in vitro bioassay for its possible antiproliferative activities on human MCF7 breast cancer cell line and HeLa cervical adenocarcinoma cell lines. The cell viability were assessed using microculture tetrazolium technique (MTT) colorimetric assay. The results showed that inner bark extract exhibited higher antiproliferative activity on MCF7 cancer cell line (IC50 91 μg ml-1) than wood extract (IC50 312 μg ml-1). But, antiproliferative activity of inner bark extract on HeLa cell lines was higher (IC50 5 μg ml-1). The inner bark extract is potential to be developed as anti cancer agent in cervical adenocarcinoma cancer therapy because moresecure against Vero normal cells (IC50 288 μg ml-1). Whereas compounds such as phenolic and fatty acid contribute to high antiproliferative activities of inner bark extract. The qualitative analysis detect the extracts containing flavonoids, triterpenoids, saphonin which are thought to contribute to the high antiproliferative activities of this extract.Keywords : Anthocephalus cadamba, antiproliferative activity, human MCF7 breast cancer cell line, HeLa cervical adenocarcinoma cell lines, Vero normal cell lines

Co-Authors A.A. Ketut Agung Cahyawan W Abigael Kabe Adi Santoso Adi Santoso ADI SANTOSO Alfira Ramadhani Putri Andi T. Lestari Bambang Hermansah Bayu Iswana Deded Sarip Nawawi Devi Armilasari Dodi Nandika Dumasari Dumasari, Dumasari Dumasari, D Efrida Basri Fauzan Fahrussiam Gérardin, Philippe Hiroshi Usuki I Kentut Pandit I.M. Sulastiningsih Ignasia Maria Sulastiningsih Imam Santosa Imam Wahyudi Indrawan, Imam Wahyudi Irsan ALIPRAJA Ismail, Rohmat Istie Rahayu Itan Iskova PURBA Jamaludin Malik Jamaludin Malik Khairunissa, Dhiya Laksono, Gilang Dwi Lina Karlinasari Lusita WARDANI Lusita WARDANI Lya Rochmawati Martha, Resa Masahiro Yoshinobu Muh. Yusram Massijaya Muh. Yusram Massijaya Muh. Yusram Massijaya Muh. Yusram Massijaya Muhamad Yusram Massijaya Muhammad Y Massijaya Naoki Okano Naresworo Nugroho Nur Alam Prihatini, Esti Remy Marchal Rita Kartika Sari Rumanintya Lisaria Putri Sabarna, Aqila Alya Nabila Sarah Augustina Sarah Augustina Shuhou Koseki Silmi Mariya Sofiaturizkiyah, Nurul Sulistyani Budiningsih Surdiding Ruhendi Surdiding RUHENDI Surdiding Ruhendi Surdiding Ruhendi Taiyo Okada Tobing, Gabriel Ulfa Adzkia Wahyuningtyas, Irma Widyana LUZA Yoichi Kojima Yusuf Sudo Hadi Yusup Amin

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