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The purpose of this study was to analyze the phisycal and mechanical properties of binderless particleboard using bamboo as raw materials. Andong bamboo (Gigantochloa pseudoarundinaceae) used in this study was taken from Bogor area. Bamboo was converted using hammer mill and air dried subsequently. The particle zise was passed of the 20 mesh screener. Three types pretreatment were used to prepare the particle, namely : 1) water boiling for 30 and 60 minutes, 2) oxydation using hydrogen peroxyde, SUHASMAN .; Muh. Yusram MASSIJAYA; Yusuf Sudo HADI; Adi SANTOSO
Jurnal Ilmu dan Teknologi Hasil Hutan Vol. 3 No. 1 (2010): Jurnal Ilmu Teknologi Hasil Hutan
Publisher : Departemen Hasil Hutan, IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar

The purpose of this study was to analyze the phisycal and mechanical properties of binderless particleboard using bamboo as raw materials. Andong bamboo (Gigantochloa pseudoarundinaceae) used in this study was taken from Bogor area. Bamboo was converted using hammer mill and air dried subsequently. The particle zise was passed of the 20 mesh screener. Three types pretreatment were used to prepare the particle, namely : 1) water boiling for 30 and 60 minutes, 2) oxydation using hydrogen peroxyde, and 3) combination of water boiling for 30 minutes and oxydation using hydrogen proxide. As a control, conventional particleboards using 10 % melamine formaldehyde (MF) resin based on dry particle weight was produced. The particle which has pretreated then utilized to produce binderless particleboard with board density of 0.75 g/cm3. The pressing conditions were 180 oC in temperature, 25 kgf/cm2 in pressure for 20 minutes. The board characteristics were tested according to JIS A 5908 2003. The results indicated that particleboard made from particle with oxydation pretreatment performed superior characteristics compared to those of particleboard made from particle only with water boiling pretreatment. Dimensional stability and modulus of elasticity of board with oxydation pretreatment were excellent. Its was superior compared to that of conventional particleboard using melamine formaldehyde as adhesive. Keywords : Bamboo, Binderless Particleboard, Oxydation, Hydrogen Peroxyde

EFEKTIVITAS BAHAN PENGISI KAYU PADA TIGA JENIS KAYU Jamal Balfas; Efrida Basri; Adi Santoso
Jurnal Penelitian Hasil Hutan Vol 36, No 2 (2018): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Penggunaan wood filler adalah sangat penting dalam pekerjaan finishing kayu. Namun wood filler komersil yang tersedia di pasar dewasa ini umumnya terbuat dari resin yang menggunakan pelarut kimia, seperti poliuretan dan nitroselulosa. Produk ini mengandung bahan yang dapat melepas polutan, yang dapat merusak lingkungan dan berbahaya bagi kesehatan. Dalam penelitian ini dilakukan eksplorasi penggunaan dan performa bahan wood filler alternatif dan komersial. Wood filler alternatif dalam penelitian ini dibuat dari campuran tepung dempul dengan resin organik yaitu sirlak, akrilik dan polivinil asetat. Performa wood filler alternatif diuji secara fisis, mekanis dan kimia pada kayu tusam, jabon dan karet, serta dibandingkan dengan performa bahan dempul komersial, yaitu nitroselulosa. Contoh uji ketiga jenis kayu dilabur dengan larutan wood filler kemudian dikeringkan. Perubahan berat dan dimensi contoh uji akibat laburan ditentukan pada kondisi basah dan kering. Ketahanan film wood filler terhadap pereaksi kimia dan pelarut diuji menurut prosedur ASTM. Ketahanan gores pada film wood filler diuji untuk mengetahui sifat mekanis dari formula wood filler. Kedekatan warna antar perlakuan wood filler dengan warna kayu kontrol dievaluasi dengan menggunakan prosedur Cielab. Hasil penelitian menunjukkan bahwa pertambahan berat dan perubahan dimensi akibat laburan wood filler beragam menurut jenis kayu. Contoh kayu tusam mengalami perubahan berat dan dimensi lebih besar daripada kayu jabon dan karet. Semua formula dempul organik mampu melindungi kayu dari intrusi air, setara dengan wood filler komersial (WF). Formula wood filler organik memiliki ketahanan gores lebih tinggi, ketahan lebih rendah terhadap larutan kimia serta penampilan warna lebih baik daripada wood filler komersial (WF).

Analisis Perbandingan Metode Just In Time dan Economic Order Quantity Adi Santoso
Jurnal Teknik Industri Vol. 10 No. 1 (2009): Februari
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/JTIUMM.Vol10.No1.7-12

UD Surabaya Rattan Industry as the middle scale of company is produced rattan chairs. This company is based on the job order to plan and develop the future company to its business strategy become mass production. In process production, the company always faces problems in the row material supply. If the row material supply is saved in long time period and there is bulking in storage it can make the rattans will be under level quality. The purpose of this research is giving information about the choosing methods of planning, controlling the row material supply with differ between Just in Time (JIT) method with Economic Order Quantity (EOQ) to minimize inventory value. The result of from chosen method for the planning of inventory control of raw material. Total Inventory Cost (TIC) which in it there are three element of it expense of that is expense of purchasing, expense of ordering, and also stock holding cost got TIC for the Method of Just in Time (JIT) period 13 to Rp233.129.629,71. While for the Method of Economic Order of Quantity (EOQ) at period 13 to Rp234,171,969.21. Calculation of Total Inventory Cost (TIC) as a whole ( period of time 1 year) by applying Method of Just In Time ( JIT) it can be seen Totalize Inventory Cost (TIC) Rp5,012,483,943.59 while by applying Economic Order of Quantity (EOQ) from Total of Inventory Cost (TIC) Rp518,088,399.86. Becoming method planning of inventory control the selected method of Just In Time (JIT) with thrift equal to Rp5,604,456.27.

Preparasi sel mamalia CHO-DG44 dan isolasi plasmid dari bakteri Eschericia coli DH5-alfa sebagai tahap dalam produksi protein terapeutik erythropoetin sebagai obat anemia Alfi Saadah; Adi Santoso; Popi Hadi Wisnu Wardhani; Yayuk Astuti
Jurnal Biologi Udayana Vol 24 No 2 (2020): JURNAL BIOLOGI UDAYANA
Publisher : Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBIOUNUD.2020.v24.i02.p04

Erythropoietin (Miranda dkk.) merupakan suatu hormon yang menstimulasi sumsum tulang untuk memproduksi sel-sel darah merah yang dibutuhkan oleh tubuh untuk membawa oksigen ke organ-organ vital. Sel CHO-DG44 merupakan salah satu sel mamalia yang dapat digunakan untuk produksi erythropoietin. Penelitian ini bertujuan menentukan pertumbuhan optimum sel CHO-DG44 selama 12 hari, dengan menggunakan parameter densitas dan viabilitas serta menentukan karakteristik DNA bakteri E. Coli DH5 alfa hasil isolasi menggunakan metode elektroforesis yang telah sesuai untuk transfeksi ke dalam sel CHO-DG44. Hasil penelitian menunjukkan Sel CHO-DG44 memiliki viabilitas rata-rata 69,82% untuk media 1 dan 75,99% untuk media 2 dengan densitas rata-rata berturut-turut yaitu 3.130.000 sel/mL dan 4.106.000 sel/mL. Sedangkan media kultur yang menghasilkan sel dengan viabilitas (kemampuan hidup) yang tinggi yaitu pada hari ke 4 untuk erlenmeyer 1 dan hari ke 6 untuk erlenmeyer 2. Dari hasil elektroforesis, DNA plasmid memiliki ukuran 5954 bp dengan konsentrasi DNA sebesar 117 ng/µl, yang sesuai dengan ukuran dan konsentrasi plasmid DNA agar dapat ditransfeksikan ke dalam sel CHO-DG44.

STUDY ON THE EFFECT OF BIOAUGMENTATION ON THE REDUCTION OF AMMONIA IN THE SEDIMENT OF SEMI INTENSIVE TAMBAK Sarjito .; Adi Santoso; Ali Djunaedi
JOURNAL OF COASTAL DEVELOPMENT Vol 3, No 3 (2000): Volume 3 Number 3 Year 2000
Publisher : JOURNAL OF COASTAL DEVELOPMENT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5533.314 KB)

The aboraratory scale experiment with split plot randomized design was perfomed to find out the effect bioaugmention on ammonia reduction in the sediment of semi intensive tambak. The msin treatment was bioaugmentaion with probiotic epicin concentration of 0; 0.5 ; 1.0 and 1.5 ppm; as sub-treatment was the salinity (20; 25 and 30 ppt), and as a group was day (0; 2; 4 and 6). The result indicated that bioaugmentation was able to reduce ammonia concentration in the sediment of semi intensive tambak. The treatments, especially dose and days had a significant affect on the reduction ammonia in the sediment (p<0.01) with exception to salinity (p>0.05). the capability of epicin as a bioaugmentation started on the day of 2. The most effective epicin dose to reduce ammonia in the sedimentof semi intensive tambak for culture of Tiger shrimp (Penaeus. Monodon F.) was 1.5 ppm.

Analisis Implementasi Corporate Social Responsibility dan Intensitas Research and Development pada Perusahaan Go-publik Adi Santoso
Islamic Economics Journal Vol 2, No 1 (2016)
Publisher : University of Darussalam Gontor

The aim of this research is to examine and analyze the effect of Corporate Social Responsibility (CSR) and intensity of Research and Development (R&D), which is expected to improve firm value and stock return on companies that go public on the Indonesia Stock Exchange. The populations of this research are companies go public on the Indonesia Stock Exchange. The samples of this research 25 companies that go public, which are observed at 2010, 2011, and 2012. The results of this research generally indicate that (1) Corporate Social Responsibility (CSR) have a significant positive effect towards firm value, (2) Intensity of research and development (R&D) have a significant positive effect towards firm value, (3) firm value have a significant positive effect towards stock return, (4) foreign ownership is able to act as a moderating variable in raising corporate socialresponsibility (CSR) and firm value, (5) foreign ownership is not able to act as a moderating variable in raising intensity of research and development (R&D) and firm value.

EFEKTIVITAS BAHAN PENGISI KAYU PADA TIGA JENIS KAYU Jamal Balfas; Efrida Basri; Adi Santoso
Jurnal Penelitian Hasil Hutan Vol 36, No 2 (2018): 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.2018.36.2.113-128

Penggunaan wood filler adalah sangat penting dalam pekerjaan finishing kayu. Namun wood filler komersil yang tersedia di pasar dewasa ini umumnya terbuat dari resin yang menggunakan pelarut kimia, seperti poliuretan dan nitroselulosa. Produk ini mengandung bahan yang dapat melepas polutan, yang dapat merusak lingkungan dan berbahaya bagi kesehatan. Dalam penelitian ini dilakukan eksplorasi penggunaan dan performa bahan wood filler alternatif dan komersial. Wood filler alternatif dalam penelitian ini dibuat dari campuran tepung dempul dengan resin organik yaitu sirlak, akrilik dan polivinil asetat. Performa wood filler alternatif diuji secara fisis, mekanis dan kimia pada kayu tusam, jabon dan karet, serta dibandingkan dengan performa bahan dempul komersial, yaitu nitroselulosa. Contoh uji ketiga jenis kayu dilabur dengan larutan wood filler kemudian dikeringkan. Perubahan berat dan dimensi contoh uji akibat laburan ditentukan pada kondisi basah dan kering. Ketahanan film wood filler terhadap pereaksi kimia dan pelarut diuji menurut prosedur ASTM. Ketahanan gores pada film wood filler diuji untuk mengetahui sifat mekanis dari formula wood filler. Kedekatan warna antar perlakuan wood filler dengan warna kayu kontrol dievaluasi dengan menggunakan prosedur Cielab. Hasil penelitian menunjukkan bahwa pertambahan berat dan perubahan dimensi akibat laburan wood filler beragam menurut jenis kayu. Contoh kayu tusam mengalami perubahan berat dan dimensi lebih besar daripada kayu jabon dan karet. Semua formula dempul organik mampu melindungi kayu dari intrusi air, setara dengan wood filler komersial (WF). Formula wood filler organik memiliki ketahanan gores lebih tinggi, ketahan lebih rendah terhadap larutan kimia serta penampilan warna lebih baik daripada wood filler komersial (WF).

PENGEMBANGAN PERANGKAT AKUISISI DATA PORTABEL BERBASIS MIKROKONTROLER AT89C52 UNTUK PENYEIMBANGAN DI LAPANGAN Zainal Abidin; Arief Indrabayu; Adi Santoso; Hariyadi Hariyadi
Mesin Vol. 17 No. 3 (2002)
Publisher : Mesin

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This paper describes the development of a portable microcontroller-based data acquisition system suitable for field balancing. The prototype was designed to have three channels. Channel 0 was designed to receive a DC signal and therefore suitable for reference signal, such as generated by optical sensor. In contrast, channels 1 and 2 were designed to receive AC signals and therefore suitable for vibration signals. In the design, the acquisition process was performed by three ADCs which sample data simultaneously, thus minimizing the phase difference between channels. The data obtained by ADC are then stored within memory, capable to store data as many as 8192 for each channel. The hardware is also equipped with a keypad modul as an input medium, an LCD modul as an output medium, and a rechargeable battery as a power supply. The software of this data acquitition system is classified into data-acquitition program and interface program. The performance of the prototype was tested using unbalance demontration setup and the results of measurement are compared to those obtained by MSA HP 35650 as a reference instrument. The measurement shows that results of measurement obtained by theprototype are relatively similar to those obtained by MSA.

DAYA TAHAN GARIS REKAT LRF PADA KAYU LAMINA MANII TERHADAP SERANGAN RAYAP KAYU KERING The LRF Glue Line Durability of Manii Laminated Wood Against Dry wood Termite Adi Santoso; Jasni Jasni
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 1, No 1 (2003): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Lignin is one of the principal components constituting wood bulk, besides cellulose and hemi cellulose. It consists of poly-phenolic molecules, serving as a binding agent, which holds the wood cells together. Lignin is also credited with imparting rigidity or stiffness to the wood, rendering its body effectively resistant to the mechanical forces imposed on it. Considering and evaluating the specific attributes of lignin, an idea has come-up to utilize it as a binder or glue in the manufacture of particleboard, plywood, or other wood products.The lignin in the sulphate’s black liquor (known as Kraft lignin) has a strong affinity when being reacted with formaldehyde to form lignin formaldehyde adhesives; and to increase the bonding strength quality, the lignin is further co-polymerization with resorcinol to form lignin resorcinol formaldehyde (LRF) resins. The resin can be employed in the manufacture of particular glued wood products such as finger-jointed wood assembly and glue laminated lumber (glulam). The research was aimed to determine the optimum composition of mole ratio in LRF glue and its pressing duration in laminated wood manufacture for construction qualities with high durability on against dry wood termite. The adhesive was prepared by mixing the isolated lignin, resorcinol and formaldehyde at various mole ratios L : R : F ( 1 : 0.5 : 2; 1 : 0,7 : 2; 1: 0,9 : 2 and control) respectively, and the pressing duration was employed by 3, 6, 12 and 24 hours at room temperature. The research results showed that the higher the resorcinol content, the longer pressing time, the higher the mortality and the lower weight loss. The mortality reaches 91.67 % and weight loss 2.17 %.

Characteristics of Laminated Bamboo Lumber Glued with Tannin Resorcinol Formaldehyde Ignasia M Sulastiningsih; Adi Santoso; Barly Barly; Mohamad I Iskandar
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 1 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The objective of this study were to determine the characteristics of laminated bamboo lumber (LBL) glued with tannin resorcinol formaldehyde with particular focus on the effects of varying pre-treatment of bamboo strips and extender content on the properties of LBL. Bamboo strips for LBL fabrication were prepared from mature culms of andong bamboo (Gigantochloa pseudoarundinaceae). The strips were assigned into 4 groups by pre-treatment methods: untreated, cold soaking in 5% boron solution for 2 hours, bleached with 17.5% H2O2 solution, and bleached with 20% H2O2 solution. The LBL was manufactured using tannin resorcinol formaldehyde (TRF) added with extender at 4 levels equal to 0, 2.5, 5, and 10% of TRF. The cold pressing time applied was 4 hours. The results showed that the average density, moisture content, thickness swelling, bending strength and bonding strength of LBL produced were 0.77 g cm-3, 8.9%, 5.2%, 1146 kg cm-2, and 51.5 kg cm-2 respectively. No delamination occurred in all samples which indicating high bonding quality. There was strong interaction between pre-treatment of bamboo strips and extender content in affecting some properties of LBL. In general three-layer thick LBL glued with tannin resorcinol formaldehyde adhesive had strength values similar to wood strength class I. Laminated bamboo lumber is suitable for wood substitute especially for furniture material.Key words: extender, laminated bamboo lumber, pre-treatment, tannin resorcinol formaldehyde

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