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All Journal Jurnal Ilmu Pertanian Indonesia Jurnal Teknologi Industri Pertanian Jurnal Ilmu dan Teknologi Hasil Hutan Jurnal Bahan Alam Terbarukan Jurnal Penelitian Hasil Hutan Acta Aquatica: Aquatic Sciences Journal JURNAL ILMIAH MAHASISWA AGROINFO GALUH JURKAM: Jurnal Konseling Andi Matappa Jurnal Ilmu dan Teknologi Kayu Tropis PERENNIAL Jurnal Penelitian Hasil Hutan Makara Journal of Technology
Dede Hermawan
Departemen Hasil Hutan, Fakultas Kehutanan Dan Lingkungan, Institut Pertanian Bogor
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Analisis Literasi Teknologi Guru Bimbingan Dan Konseling Se-DKI Jakarta Menghadapi Era Industri 4.0 Hermawan, Dede; Aisyah, Syifa; Khoirunnissa, Khoirunnissa
JURKAM: Jurnal Konseling Andi Matappa Volume 3 Nomor 2 Agustus 2019
Publisher : STKIP Andi Matappa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (43.858 KB) | DOI: 10.31100/jurkam.v3i2.367

Abstract

Technology literacy is the capacity to operate, manage, assess and realize the technology is. This study aims to determine an empirical description of the level of technological literacy owned by counselor/counseling teacher in Jakarta. This research uses a quantitative approach with descriptive research methods.The data collection was worked out using by technology literacy instruments by taking a sample from 157 junior high school with counseling teachers around DKI Jakarta. The results of the research related to the level of technological literacy showed that 61.14% of counseling teachers were in the top categories, which iz 35.03% in the sufficient category and 3.82% in the low and very low categories.
Hybrid Particleboard Made of Corn Husk (Zea Mays L.) and Sembilang Bamboo (Dendrocalamus Giganteus Munro): Effect of Adhesive Type and Particle Composition Prasetiyo, Kurnia Wiji; Hermawan, Dede; Hadi, Yusuf Sudo; Subyakto, Subyakto; Firdaus, Muhammad; Syamani, Firda Aulya; Astari, Lilik
Jurnal Bahan Alam Terbarukan Vol 10, No 2 (2021): December 2021 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v10i2.31600

Abstract

Particleboard is a panel product made of wood particles or other lignocellulosic materials added with adhesive then pressed. The development of particleboard manufactured using non wood biomass has become important due to the decreased of wood as main raw material for the particleboard industry. Corn husk (Zea mays L.) and Sembilang bamboo (Dendrocalamus giganteus Munro) are lignocellulosic biomass that has  potential as  renewable materials for hybrid particleboard. The purposes of this study were to determine the suitability, the effect of adhesive type, and particle composition on physical and mechanical properties of hybrid particleboard made of corn husk and Sembilang bamboo particles. The adhesive types used were urea formaldehyde (UF) and phenol formaldehyde (PF) with 10 wt% adhesive content and the composition of corn husk : Sembilang bamboo was  set at 100 : 0, 75 : 25, 50 : 50, 25 : 75, 0 : 100 (% w/w). The target density of hybrid particleboard was set at 0.80 g/cm3. The boards were manufactured at 130 °C for UF and 150 °C for PF press temperature, 10 minutes and 2.5 MPa for the pressure of the hot press. The results showed that hybrid particleboard properties improved with increasing the amount of Sembilang bamboo particles in the board. Hybrid particleboard properties affected in ascending order were modulus of rupture (MOR), modulus of elasticity (MOE), internal bond (IB) and screw holding power (SHP). Generally, hybrid particleboard bonded PF adhesive has better properties than bonded UF adhesive. Results indicated that the addition of Sembilang bamboo particles in the mixture resulted in better properties of hybrid particleboard.
Karakteristik Oriented Strand Board dari Kayu Akasia dan Afrika Berdasarkan Penyusunan Arah Strand Nurhaida Nurhaida; Naresworo Nugroho; Dede Hermawan
Jurnal Ilmu Pertanian Indonesia Vol. 13 No. 1 (2008): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

The research objectives arc to evaluate physical and mechanical properties of OSB based on strands orientation; and to evaluate physical and mechanical properties of OSB made from akasia wood (Acacia mangium Wild) and afrika wood (Maesopsis eminii Engl). Akasia and afrika wood are used for OSB strand material with phenol formaldehyde (PF) as adhesives and addition of paraffin. OSB made in this research is consist of three plies whereas are differed into eight (8) strand orientations. In the making process, hot press was carried out at 160OC and pressure 25kg.cm-2 for 15 minutes. Determination of OSB physical and mechanical properties is referred to JIS A 5908-2003. Result showed that strand orientations has no affect to OSB physical properties except for linicr swelling 24h, but it significantly influence all mechanical properties of OSB. Wood species have an effect on mechanical properties of OSB in the dry test, wet MOE lengthwise test and OSB physical properties, particularly to OSB density and water absorbing capability at 2h and 24h. All of OSB physical properties arc meet JIS A 5908-2003 standard, but not all of the mechanical properties such as dry MOE lengthwise, dry MOE and MOR widthwise. The best physical and mechanical properties is presented by OSB made from akasia wood in strand orientation F, G, Band C whereas all parameters meet JIS A 5908-2003 standard. In comparation with strand orientation B that is frequent used in industry, strand orientation F and G arc proficient to raise the modulus elasticity value (MOE) and strength (MOR) as much as 167.81-231.65% and 89.73-109.87%, respectively; especially in widthwise board application. Furthermore, strand orientation F and G arc more flexible as structural components.   Keywords: oriented strand board, phenol formaldehyde, strand orientation
PENGUJIAN SIFAT FISIS-MEKANIS DAN NONDESTRUKTIF METODE GELOMBANG SUARA PAPAN WOL SEMEN BERKERAPATAN SEDANG-TINGGI BAMBU BETUNG (DENDROCALAMUS ASPER) Lina Karlinasari; Dede Hermawan; Akhiruddin Maddu; M. Farouq Iksan; Anita Firmanti
Jurnal Ilmu Pertanian Indonesia Vol. 17 No. 1 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

Cement board is a composite wood product has advantages such as fire resistance, termite, water resistant, and has good sound insulation properties. Bamboo is suitable material that can be used as a raw material of cement board. The objectove of this study was to determine the physical-mechanical properties of wool cement boards from betung bamboo (Dendrocalamus asper) in various densities. Mechanical testing included nondestructive testing performed using the sound waves velocity method (stress wave velocity). The material used was particles of wool/ excelsior dimensions. The adhesive used was Portland cement type I by the ratio of bamboo: cement: water 1:2:1. Target board densities were 0.5 g/cm3; 0.8 g/cm3; and 1.0 g/cm3. The results showed the higher density of the board the higher mechanical properties of boards. The difference density cement board was more influential on mechanical properties (MOE, MOR, SW) board compared with those physical properties. Nondestrcutive testing using sound waves velocity method can be used to predict mechanical bending properties of wool cement board of betung bamboo as indicated by the close relationship between the parameter estimators (dynamic MOE) and static testing value (MOE and MOR). 
IN SITU TRANSESTERIFICATION OF JATROPHA SEEDS: EFFECT OF REACTANT TYPE, STIRRING SPEED AND REACTION TEMPERATURE ON YIELD AND QUALITY OF BIODIESEL Ika Amalia Kartika, Mohamad Yani dan Dede Hermawan
Jurnal Teknologi Industri Pertanian Vol. 21 No. 1 (2011): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

ABSTRACT  The objective of this study was to investigate in situ transesterification process which allows direct production of biodiesel from jatropha seeds. The reactant type (methanol and ethanol), the stirring speed (700, 800 and 900 rpm) and the reaction temperature (40, 50 and 60°C) were examined to determine the best performance of the biodiesel production yield and its quality. Generally, the stirring speed and the reaction temperature affected biodiesel production yield. An increase of biodiesel yield was observed as stirring speed and reaction temperature were increased. The reactant type did not affected biodiesel production yield. The highest biodiesel yield for the reactant of methanol (82.2%) and the reactant of ethanol (82.5) were obtained respectively under the stirring speed of 800 and 900 rpm, and the reaction temperature of 50°C. The effects of the reactant type, stirring speed and reaction temperature on biodiesel quality were less important. In all experiments tested, the biodiesel quality was very good. The acid value was below 0.5 mg KOH/g of biodiesel, water and sediment contents were very poor (< 0.05%), viscosity was low (< 3.6 cSt), saponification and ester values were high (> 180 mg KOH/g of biodiesel). In addition, the quality of biodiesel produced under optimum process condition was in accordance with Indonesian Biodiesel Standard. Keywords: transesterification, in situ, jatropha, biodiesel 
SIFAT FISIK DAN MEKANIK PAPAN PARTIKEL DARI BUNGKIL BIJI JARAK PAGAR Ika Amalia Kartika, Farah Fahma, Mohamad Yani, Dede Hermawan TIP
Jurnal Teknologi Industri Pertanian Vol. 23 No. 2 (2013): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

Bungkil biji jarak pagar adalah salah satu produk samping (by-product) dari pengolahan biji jarak pagarmenjadi minyak jarak dan biodiesel, yang saat ini belum dimanfaatkan secara optimal. Sebagai by-productdengan kandungan protein (18%) dan serat (39%) yang tinggi, bungkil biji jarak pagar memiliki potensi untukdimanfaatkan sebagai bahan baku papan partikel. Tujuan penelitian ini adalah untuk mengetahui sifat fisik danmekanik papan partikel yang diproduksi dari bungkil biji jarak pagar, dan mengetahui pengaruh perlakuanvariasi kadar air bungkil (7%, 20%), konsentrasi gliserol (0%, 4%) dan waktu pengukusan bungkil (0, 30, 60menit) terhadap mutu papan partikel. Adapun standar pengujian yang digunakan adalah JIS A 5908-2003. Hasilpenelitian menunjukkan bahwa kadar air bungkil, konsentrasi gliserol dan waktu pengukusan mempengaruhisifat fisik dan mekanik papan partikel. Namun demikian, hanya peningkatan kadar air bungkil yang berpengaruhsecara signifikan terhadap peningkatan mutu papan partikel. Pada 2 taraf kadar air bungkil yang diuji dalam studiini, semakin tinggi kadar air bungkil, kerapatan, kekuatan lentur dan keteguhan patah papan partikel semakinmeningkat, sedangkan daya serap airnya cenderung menurun. Sifat fisik dan mekanik papan partikel dari bungkilbiji jarak pagar secara umum belum memenuhi standar JIS A 5908-2003 dan belum sesuai untukpemanfaatannya sebagai material konstruksi.Kata kunci: papan partikel, bungkil, jarak pagar, kekuatan lentur, keteguhan patah
SIFAT FISIK DAN MEKANIK PAPAN PARTIKEL DARI CANGKANG BUAH JARAK PAGAR Dede Hermawan, Ana Agustina, Ono Suparno, Ika Amalia Kartika
Jurnal Teknologi Industri Pertanian Vol. 25 No. 3 (2015): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

The jatropha shell is a by-product from jatropha oil production. It is a potential cellulosic material for particleboard because of its high fiber content (40%). The purposes of this study were to determine the physical and mechanical properties of the particleboard produced from the jatropha shell, and to investigate the effect of the adhesive agent concentration on the particleboard quality. The adhesive agents used were phenol formaldehyde (12, 14 and 16%) and urea formaldehyde (10, 12 and 14%). The physical and mechanical properties of the particleboard were examined using JIS A 5908-2003. The results showed that the phenol formaldehyde as adhesive agent could improve the dimensional stability and mechanical properties of the particleboard. An increase of adhesive agent concentration increased modulus of elasticity, modulus of rupture, internal bond and wood screw holding power of particle board, and decreased water content, water absorption and thickness swelling of particleboard. Most of the physical and mechanical properties of the jatropha shell particleboard obtained in this study did not meet JIS A 5908-2003, and was not appropriate to be used as a construction material. Keywords: Jatropha shell, particleboard, phenol formaldehyde, urea formaldehyde
OPTIMASI PROSES PRODUKSI BIODIESEL JARAK PAGAR MELALUI TRANSESTERIFIKASI IN SITU Ika Amalia Kartika,Ariska Duti Lina, Ono Suparno, Dede Hermawan
Jurnal Teknologi Industri Pertanian Vol. 26 No. 1 (2016): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

Jatropha seed is potential to be utilized as raw material for biodiesel production by in situ transesterification because of its high oil content (30%). The objective of this research was to optimis reaction time and hexane to total solvent ratio in biodiesel production from jatropha seed by in situ transesterification, and to analyze the influence of reaction time and hexane to total solvent ratio on biodiesel yield and quality. The research was designed using Central Composite Design, and the in situ transesterification process was carried out at 400 rpm stirring speed and 50°C reaction temperature with potassium hidroxice (KOH) concentration of 0.075 mol/L in methanol. The process conditions were optimized using Response Surface Method with reaction time (4-10 h) and hexane to total solvent ratio (0.01-0.416) as their process variables, and the responses measured were biodiesel yield, density, viscosity, acid, saponification and ester values. The optimum process conditions to produce biodiesel from jatropha seed by in situ transesterification were obtained at 7.08 h reaction time and 0.32 hexane to total solvent ratio. For these process conditions, the optimum biodiesel yield was 57.4% with acid value of 0.48 mg KOH/g, saponification value of 281.7 mg KOH/g, ester value of 281.3 mg KOH/g, viscosity of 3.60 cSt and density of 0.67 g/cm3. The effect of process conditions on biodiesel yield was significant, especially hexane to total solvent ratio. However their effect on biodiesel quality is not important. Keywords: biodiesel, in situ transesterification, jatropha, optimization, response surface method
OPTIMASI PROSES PRODUKSI PAPAN PARTIKEL DARI AMPAS BIJI JARAK PAGAR (Jatropha curcas L.) Fherdes Setiawan, Ika Amalia Kartika, Mohamad Yani, Dede Hermawan
Jurnal Teknologi Industri Pertanian Vol. 26 No. 2 (2016): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

Jatropha seed cake contained fiber and protein compounds that can be utilized as a biocomposite products such as particle board.The optimization of production process of particle board conducted with four factors : moisture content, steaming time, pressing temperature, and pressing time. The experimental design used central composite design (CCD) by using response surface method (RSM). Physical and mechanical properties (density, moisture content, water absorption, MOR and MOE) were tested with JIS A 5908-2003. The quality of particleboard from jatropha seed cake were density 0.88 – 1.15 g/cm3, moisture content 6.53 – 10.27%, water absorption at 2 hours 17 – 46%, water absorption at 24 hours 31 – 54%, MOR 36.2 – 275 kgf/cm2, and MOE 2200 – 14500kgf/cm2. The optimization models multi response was evaluated. The optimum of production process was obtained at moisture content 15%, steaming time 25 minutes, pressing temperature 180oC, and pressing time 8 minutes, where the quality of particleboard product were at moisture content 6.51%, water absorption at 24 hours 34.67%, MOR 275 kgf/cm2, and MOE 14600 kgf/cm2.Keywords : jatropha seed cake, particleboard, response surface method
The research objectives are to evaluate physical and mechanical properties of OSB based on strand orientations made from akasia wood (Acacia mangium Wild) and afrika wood (Maesopsis eminii Engl). Akasia and afrika wood are used for OSB strand material with phenol formaldehyde (PF) as adhesives and addition of paraffin. OSB made in this research consists of three plies whereas are differed into eight strand orientations.  Hot press was carried out at 160ºC and pressure 25 kg/cm² for 15 minutes. D NURHAIDA .; Naresworo NUGROHO; Dede HERMAWAN
Jurnal Ilmu dan Teknologi Hasil Hutan Vol. 1 No. 2 (2008): Jurnal Ilmu Teknologi Hasil Hutan
Publisher : Departemen Hasil Hutan, IPB

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Abstract

The research objectives are to evaluate physical and mechanical properties of OSB based on strand orientations made from akasia wood (Acacia mangium Wild) and afrika wood (Maesopsis eminii Engl). Akasia and afrika wood are used for OSB strand material with phenol formaldehyde (PF) as adhesives and addition of paraffin. OSB made in this research consists of three plies whereas are differed into eight strand orientations.  Hot press was carried out at 160ºC and pressure 25 kg/cm² for 15 minutes. Determination of OSB physical and mechanical properties referred to JIS A 5908-2003. Result showed that strand orientations have not affected to OSB physical properties except for linear swelling 24 h, but it significantly influences all mechanical properties of OSB. Wood species has an effect on mechanical properties of OSB in the dry test, wet MOE lengthwise test and OSB physical properties, particularly to OSB density and water absorbing capability at 2 h and 24 h.  All of OSB physical properties are meet JIS A 5908-2003 standard, but not all of the mechanical properties such as dry MOE lengthwise, dry MOE and MOR widthwise. The best physical and mechanical properties is presented by OSB made from akasia wood in strand orientation F (core layer is orientated and surface layers are in random, R°/0°/R°), G (core layer is orientated 45° and surface layers are in random, R°/45°/R°), B (surface strand direction is upright to core strand direction, 0°/90º/0°), and C (core layer is in random, surface layers are orientated, 0°/R/0°) whereas all parameters meet JIS A 5908-2003 standard. In comparation with strand orientation B that is frequent used in industry, strand orientation F and G are proficient to raise the modulus elasticity value (MOE) and strength (MOR) as much as 167.8-231.7% and 89.7-109.9%, respectively; especially in widthwise board application. Furthermore, strand orientation F and G are more flexible as structural components. Keywords:   Oriented strand board, strand orientation, phenol formaldehyde
Co-Authors ADI SANTOSO Agus Yuniawan Isyanto Aisyah, Syifa Akhiruddin Maddu Alimuddin Alimuddin Andi SRD Lestari Anita Firmanti Apri H Iswanto Apri Heri Iswanto Apri Iswanto Apri Iswanto, Apri Astari, Lilik Bagus MARTIANTO Budi Setia Fauzi Febrianto Firda A. Syamani Firda Aulya Syamani Gustan Pari Gustan Pari Gustan Pari Hanung Adi Nugroho Ismail Budiman Ismail Budiman Ismail Budiman Jajang Suryana Jajang Sutiawan Khoirunnissa, Khoirunnissa Kurnia Wiji Prasetiyo Kurnia Wiji Prasetyo Lina Karlinasari M. Farouq Iksan Muhammad F Ikhsan Muhammad Firdaus Muhammad Sadir Muhammad Y Massijaya Muhammad Zairin Jr Mustamu, Sofia Naresworo Nugroho Nofrisman Jaya Putra Zendrato NURHAIDA . Nurhaida Nurhaida Odang Carman Prama Hartami Robi’atul Utami Aini Rohny Setiawan Maail Salim Hiziroglu Subyakto Subyakto Subyakto Subyakto Subyakto Subyakto Subyakto Subyakto Suci Mardhatillah Sukma S. Kusumah Sukma Surya Kusumah Surdiding RUHENDI Surdiding Ruhendi Surdiding Ruhendi Syamani, Firda Aulya Yusuf Hadi Yusuf Hadi, Yusuf Yusuf Sudo Hadi