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All Journal Indonesian Journal of Forestry Research Jurnal Penelitian Hasil Hutan JURNAL ANALISIS KEBIJAKAN KEHUTANAN Journal of Degraded and Mining Lands Management REFLEKSI EDUKATIKA Journal of Mathematics Instruction, Social Research and Opinion
Jamaludin MALIK
R&D Centre for Forestry Enginering and Forest01 Product Processing, 5 Gunung Batu Street, Bogor 16610, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Education Languange, Linguistic, Communication & Media Mathematics Social Sciences

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TANNIN RESORCINOL FORMALDEHYDE AS POTENTIAL GLUE FOR THE MANUFACTURE OF PLYBAMBOO Santoso, Adi; Hadi, Yusuf Sudo; Malik, Jamaludin
Indonesian Journal of Forestry Research Vol 9, No 1 (2012): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

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Abstract

KAJIAN PERMASALAHAN INDUSTRI KAYU DALAM KAITANNYA DENGAN KEBIJAKAN PEMBANGUNAN TERMINAL KAYU TERPADU DI JAWA TENGAH Malik, Jamaludin; Wijaya, Holi Bina; Handayani, Wiwandari
ISSN 0216-0897
Publisher : Pusat Penelitian dan Pengembangan Perubahan Iklim dan Kebijakan

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Abstract

Industri pengolahan kayu dan mebel (IPKM) Jawa Tengah saat ini menghadapi permasalahan kekurangan bahan baku kayu. Hal ini memunculkan ide untuk membangun terminal kayu terpadu (TKT). Oleh karena investasi pembangunan TKT membutuhkan biaya yang sangat besar, sementara permasalahan inti industri kayu Jawa Tengah belum diketahui, maka diperlukan kajian untuk mengetahui dibutuhkan atau tidaknya terminal kayu terpadu sebagai fasilitas penunjang industri kayu di Jawa Tengah. Tulisan ini mengemukakan hasil kajian terhadap kebijakan pembangunan terminal kayu terpadu tersebut. Kajian difokuskan pada permasalahan yang dihadapi IPKM, solusi yang dikemukakan dan tingkat pasokan dan kebutuhan bahan baku kayu. Kajian dilakukan dengan metode deskriptif dan eksploratif yang menganalisis data kuantitatif dan kualitatif, baik sekunder maupun primer yang diperoleh melalui wawancara mendalam terhadap responden dengan kriteria tertentu yang dipilih secara purposive sampling. Hasil analisis menunjukkan bahwa terdapat empat permasalahan utama IPKM Jawa Tengah, berturut-turut menurut prioritasnya adalah: (i)Kesenjangan antara pasokan dengan kebutuhan bahan baku kayu; (ii) Iklim usaha kurang kondusif; (iii) Kebijakan/peraturan dari pemerintah dirasa memberatkan dan tidak konsisten, dan (iv) Kompetensi sumber daya manusia, teknologi serta kelembagaan dan sarana/prasarana yang kurang. Sementara itu, pembangunan TKT bukan satu-satunya solusi yang harus dilakukan, melainkan harus simultan dengan alternatif solusi lainnya. Berdasarkan analisis diketahui bahwa apabila TKT dibangun saat ini maka akan kesulitan untuk mendapatkan pasokan kayu, baik dari luar Jawa mupun impor. Hal ini diebabkan oleh defisit bahan baku juga terjadi di wilayah utama (luar Pulau Jawa) penghasil kayu mencapai sekitar 50 juta m3 /tahun dan secara global mencapai lebih dari 740 juta m3 /tahun.
SAWING RECOVERY OF SEVERAL SAWMILLS IN JEPARA Malik, Jamaludin; Hopewell, Gary P
Jurnal Penelitian Hasil Hutan Vol 29, No 4 (2011): JURNAL PENELITIAN HASIL HUTAN
Publisher : Pusat Litbang Keteknikan Kehutanan dan Pengolahan Hasil Hutan

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Abstract

In the situation of wood material shortage, it is important to furniture manufacturers to efficiently utilize the wood. Increasing efficiency for improving value added of small medium enterprises of wood furniture industries in Jepara should be carried out from the first stage in wood processing: sawing that will convert logs into sawn timber. A study has been carried out on improving sawing recovery of sawntimber by live-sawing pattern to make loseware lumber for furniture material in Jepara region. This study was done by investigating the current sawing recovery data as determined during one full days processing at each of the four bandsaw mill facilities and one chainsaw/carving facility. The results indicate that the current recovery rate of sawmilling services companies in Jepara reached 70 - 80 %. These recoveries are relatively high due to the live sawing pattern used and the fact that sawn boards were not edged or resawn into square pieces at the mill. Compared to existing rules and the Government standard for calculating the recovery rate, sawmilling service companies in Jepara have practiced efficient processing in sawing.
SAWING RECOVERY OF SEVERAL SAWMILLS IN JEPARA Malik, Jamaludin; Hopewell, Gary P
Jurnal Penelitian Hasil Hutan Vol 29, No 4 (2011): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2379.85 KB) | DOI: 10.20886/jphh.2011.29.4.331-342

Abstract

In the situation of wood material shortage, it is important to furniture manufacturers to efficiently utilize the wood. Increasing efficiency for improving value added of small medium enterprises of wood furniture industries in Jepara should be carried out from the first stage in wood processing: sawing that will convert logs into sawn timber. A study has been carried out on improving sawing recovery of sawntimber by live-sawing pattern to make loseware lumber for furniture material in Jepara region. This study was done by investigating the current sawing recovery data as determined during one full days processing at each of the four bandsaw mill facilities and one chainsaw/carving facility. The results indicate that the current recovery rate of sawmilling services companies in Jepara reached 70 - 80 %. These recoveries are relatively high due to the live sawing pattern used and the fact that sawn boards were not edged or resawn into square pieces at the mill. Compared to existing rules and the Government standard for calculating the recovery rate, sawmilling service companies in Jepara have practiced efficient processing in sawing.
KARAKTERISTIK KAYU LAMINA DARI KAYU KERUING BERMINYAK SETELAH DIEKSTRAK Malik, Jamaludin; Santoso, Adi
Jurnal Penelitian Hasil Hutan Vol 29, No 3 (2011): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1572.285 KB) | DOI: 10.20886/jphh.2011.29.3.271-277

Abstract

Pemanfaatan kayu keruing berminyak untuk produk laminasi masih belum optimal karena masalah zat ekstraktif yang muncul ke permukaan dan mengganggu proses perekatan. Oleh karena itu penelitian untuk mengetahui pengaruh pelarutan zat ekstraktif terhadap beberapa sifat kayu lamina perlu dilakukan. Penelitian ini dilakukan dengan membuat kayu lamina dari kayu keruing berminyak jenis Dipterocarpus hasseltii setelah zat ekstraktifnya dilarutkan dengan cara memanaskan (merebus) kayu tersebut dalam larutan etanol 35% (v/v). Pengujian kayu lamina menggunakan standar JAS-2003. Hasil penelitian menunjukkan bahwa perlakuan perebusan dalam larutan etanol 35% dapat meningkatkan sifat keterbasahan secara nyata sebesar 54%, meningkatkan nilai keteguhan rekat kayu lamina dari 11,41 kg/cm2 menjadi 77,90 kg/cm2 (583%) pada uji kering dan dari 2,66 kg/cm2 menjadi 8,41 kg/cm2 (216%) pada uji basah serta menurunkan tingkat delaminasi dari 107% menjadi 36%. Kayu lamina dari kayu keruing berminyak yang sudah diekstrak memenuhi persyaratan standar untuk digunakan sebagai komponen produk dalam ruangan.
TANNIN RESORCINOL FORMALDEHYDE AS POTENTIAL GLUE FOR THE MANUFACTURE OF PLYBAMBOO Santoso, Adi; Hadi, Yusuf Sudo; Malik, Jamaludin
Indonesian Journal of Forestry Research Vol 9, No 1 (2012): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2012.9.1.10-15

Abstract

KARAKTERISTIK KAYU LAMINA DARI KAYU KERUING BERMINYAK SETELAH DIEKSTRAK Malik, Jamaludin; Santoso, Adi
Jurnal Penelitian Hasil Hutan Vol 29, No 3 (2011): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2011.29.3.271-277

Abstract

Pemanfaatan kayu keruing berminyak untuk produk laminasi masih belum optimal karena masalah zat ekstraktif yang muncul ke permukaan dan mengganggu proses perekatan. Oleh karena itu penelitian untuk mengetahui pengaruh pelarutan zat ekstraktif terhadap beberapa sifat kayu lamina perlu dilakukan. Penelitian ini dilakukan dengan membuat kayu lamina dari kayu keruing berminyak jenis Dipterocarpus hasseltii setelah zat ekstraktifnya dilarutkan dengan cara memanaskan (merebus) kayu tersebut dalam larutan etanol 35% (v/v). Pengujian kayu lamina menggunakan standar JAS-2003. Hasil penelitian menunjukkan bahwa perlakuan perebusan dalam larutan etanol 35% dapat meningkatkan sifat keterbasahan secara nyata sebesar 54%, meningkatkan nilai keteguhan rekat kayu lamina dari 11,41 kg/cm2 menjadi 77,90 kg/cm2 (583%) pada uji kering dan dari 2,66 kg/cm2 menjadi 8,41 kg/cm2 (216%) pada uji basah serta menurunkan tingkat delaminasi dari 107% menjadi 36%. Kayu lamina dari kayu keruing berminyak yang sudah diekstrak memenuhi persyaratan standar untuk digunakan sebagai komponen produk dalam ruangan.
CHARACTERISTICS OF LAMINATED WOOD OF LOGGING WASTE OF THREE NATURAL FOREST WOOD SPECIES Malik, Jamaludin; Santoso, Adi; Roliadi, Han
Indonesian Journal of Forestry Research Vol 2, No 1 (2005): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2005.2.1.37-48

Abstract

This research is aimed to assess the characteristics of 3-ply laminated wood assembly incorporating wood waste belonged to three species i.e. bengkal (Nauclea sp.), pisang-pisang (Alponsea teysmanii Boerl), and jambu-jambu (Eugenia spp.).  The waste was procured from logged natural forests. The used adhesive was tannin-resorcinol formaldehyde.  The lamination experiment was replicated three times. The assessed characteristics were moisture content, density, formaldehyde emission, bonding strength, wood defect, and static bending strength.The resulting 3-ply laminated wood assembly (beam) has a moisture content at 4.00 - 13.90%, density 0.30 - 0.68 gram per cm3, and formaldehyde emission 0.323 - 3.199 mg per liter that tended to increase with the decrease in density of the laminated wood.  The bonding strength of the laminated wood ranges varied from 47.14 to 107.52 kg per cm2  (dry testing) and 40.76 - 79.57 kg per cm2  (wet testing).  Likewise, wood defect was about 80 - 100% (dry test) and 20 - 80% (wet test).  Static bending strength varied from 455.62 - 843.36 kg per cm2 (for MOE) and from 35,985.49 to 104,332.63 kg per cm2 (for MOR). Based on these data, the three wood waste species afforded good bending strength and they were suitable for reconstituting material for exterior-type laminated wood beam.
PENERAPAN METODE DISKUSI KELOMPOK UNTUK MENINGKATKAN HASIL BELAJAR IPA DAN AKTIVITAS SISWA KELAS IV SD I SIDOREKSO PADA MATERI MENGGOLONGKAN HEWAN BERDASARKAN JENIS MAKANANNYA Malik, Jamaludin
Refleksi Edukatika : Jurnal Ilmiah Kependidikan Vol 9, No 2 (2019): Refleksi Edukatika : Jurnal Ilmiah Kependidikan
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/re.v9i2.3054

Abstract

The purpose of this study was to determine the improvement of learning outcomes of science materials classifying animals based on the type of food using group discussion methods in fourth grade students of SD 1 Sidorekso as well as to improve student learning activities especially in the first semester of 2015/2016 science lessons. The research method used is classroom action research. The research subjects were 27 students. Data collection techniques using the test method. The analysis technique goes through two stages, namely 1) using comparative descriptive analysis techniques and 2) using observation techniques with descriptive analysis based on the results of observation and reflection. The study carried out two cycles from July to September 2015. Each cycle includes four stages of activity, namely planning (planning), implementing actions (acting),observing (observing) and reflection (reflecting). The results showed that the learning outcomes of science about classifying animals based on their type of food using group discussion methods in fourth grade students of SD 1 Sidorekso could increase. From the initial conditions, the average formative test score is 61.48 with the percentage completed 29.63% and the percentage of tifak complete 70.37%. The results of the first cycle increased by an average of 68.15 with a complete percentage of 66.67% and the percentage did not complete 33.33%. The results of the second cycle rose to 73.70 with the percentage completed 96.30% and the percentage did not complete 3.70%. Conclusion of group discussion methods can improve science learning outcomes and student activities.
Harnessing hyperaccumulator (Brassica oleracea var. alboglabra) extract for green synthesis of nickel oxide nanoparticles: A prospective route for post-phytoremediation Hamdan, Abd Mujahid; Maulida, Zahratul; Lubis, Syafrina Sari; Sardi, Arif; Reksamunandar, Rhyan Prayuddy; Nisah, Khairun; Malik, Jamaludin
Journal of Degraded and Mining Lands Management Vol. 11 No. 4 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.114.6427

Abstract

Even though phytoremediation is considered a green technology for remediating heavy metals, there are some problems with the application of this technology, particularly when it comes to managing the biomass that is used. So, processing biomass needs to be given a lot of attention. This study outlined the utilization of extracts obtained from the hyperaccumulator plant Brassica oleracea var. alboglabra to synthesize nickel oxide nanoparticles. Subsequently, the nanoparticle underwent testing to determine its suitability as an absorbent for heavy metals, specifically lead, as well as its efficacy as an antifungal agent against Fusarium sp. strain. The characterization of nickel oxide nanoparticles involved several measurements, such as scanning electron microscopy analysis, high- and low-resolution transmission electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and hysteresis curve acquisition. The research findings indicate that the extract from hyperaccumulators can be utilized for the synthesis of NiO, which exhibits an absorption capacity exceeding 98% and serves as an efficient antifungal agent against Fusarium sp. pathogens. The approach utilized in this study not only prioritizes "green" and sustainability factors but also takes into account the economic aspects associated with the items being manufactured. The research has important implications in two areas. Firstly, it demonstrates the utilization of natural resources (B. oleracea var. alboglabra) in the production of nickel oxide, which serves as a safer and more eco-friendly substitute for dangerous chemicals. Furthermore, it aids in the advancement of novel techniques for effectively managing biomass hyperaccumulators.
Co-Authors A.A. Ketut Agung Cahyawan W Abd Mujahid Hamdan Arif Sardi, Arif Gary P Hopewell, Gary P Han Roliadi Holi Bina Wijaya Khairun Nisah Maulida, Zahratul Nasiwan nasiwan Reksamunandar, Rhyan Prayuddy Syafrina Sari Lubis Wiwandari Handayani Yusuf Sudo Hadi