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All Journal Medical Journal of Indonesia Jurnal Pengabdian Magister Pendidikan IPA Jurnal Psikiatri Surabaya (Surabaya Psychiatry Journal) Jurnal Penelitian Psikologi Indian Journal of Forensic Medicine & Toxicology JKKI : Jurnal Kedokteran dan Kesehatan Indonesia Jurnal Penelitian Hasil Hutan
Abdurachman
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Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Education Health Professions Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences

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SIFAT FISIS DAN STABILISASI DIMENSI BEBERAPA JENIS BAMBU KOMERSIAL Barly; Agus Ismanto; Dominicus Martono; Abdurachman; Andianto
Jurnal Penelitian Hasil Hutan Vol. 30 No. 3 (2012): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2012.30.3.163-170

Abstract

This experiment aims to look into appropriate formulate which may improve physical properties and dimentional stability of bamboos to optimize their uses as construction materials. Results revealed that length of culm (stem), number of internodes, and internode length varied in accord with different bamboo species. Moisture content of bamboo varied depending on species, ie.bijan or ater (236.15%), mayan (181.52%), tali (117.32%), and hitam (111.83%). Likewise, bamboo density also varied, ie, tali (0.93), andong (0.88), mayan (0.83), bijan or ater (0,79), hitam (0.78), and betung (0.78). The density of bamboo decreases in cross-section moving, from the periphery, middle to inner part. Volumetric shrinkage varieds according to bamboo species, i.e. mayan (9.04%), betung (15.75%), andong (16.32%), and ater (38,45%). The bigbest ASE percentage (95.57%) occured at ater (LO), while the lowest (-144,92%) was of mayan (SCa). Bamboo that afford responses to ASE percentage value was arranged from the bighest, i.e. LO, PEG, SPA, B, A, C. The LO agent was absorbed the least by all bamboo species, followed in increasing order by PEG with the expection of hitam hamboo, Bamboo that absorbed the swell-resisting order by PEG with the least was the andong (14.22%) with LO, and the greatest inflicted by bitam (137,54%) with PEG, Almost all bamban species were able to absorb the entire swell-resisting agents in large amount. The retention of agents in dry bamboo was arranged in order from the bigbest to the Inwest, ie. PEG, LO, SCa, and SPo The highest to the lowest retentions were of consecutively hitam, ater, tutul, andang, mayan, and betung.
KLASIFIKASI MUTU 11 JENIS ROTAN INDONESIA BERDASARKAN KERAPATAN DAN KETEGUHAN LENTUR Rohmah Pari; Abdurachman; Jasni; Titi Kalima
Jurnal Penelitian Hasil Hutan Vol. 36 No. 1 (2018): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2018.36.1.13-22

Abstract

Rattan is a lignocellulose plant that can be used for furmiture and other handicraft product. Quality and characteristics of the rattan species should be identified to comply with their utilization purposes. This research aimed to study the quality classification of 11 less used rattan species from Kalimantan, Sulawesi and Sumatera based on their physical properties (density) and mechanical properties (bending strength). The testing method applied was modified from ASTM D143-94. This modification was carried out because the formula used in ASTM is for square cross-section while rattan has cylindrical cross-section. The study of 11 species of rattan, based on the physical and mechanical properties, showed that three species of rattan from Kalimantan were classified in to class II – I (Calamus lobbianus), class III (Daemonorops fissa) and class IV – III (C. marginatus), while the three species of rattan from Sulawesi were grouped in to class I (C. robinsonianus), class II (C. scleracanthus) and class II – III (C. mindorensis). The remaining five species of rattan from Sumatera were categorized in class I – II (C. rugosus), class II – I (C. spectatissimus), class I – III (D. longipes), class II – III (D. verticillaris), and class III (D. sepal). These results could be used as a consideration for utilization of high quality rattan for furniture material that hold heavy load while low quality rattan may be used for holding light load only.
KARAKTERISTIK FISIS DAN MEKANIS GLULAM JATI, MANGIUM DAN TREMBESI Nurwati Hadjib; Abdurachman; Efrida Basri
Jurnal Penelitian Hasil Hutan Vol. 33 No. 2 (2015): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2015.33.2.105-114

Abstract

This paper studies the physical and mechanical characteristics of the glued-laminated (glulam) beams made from small diameter of three fast growing species i.e. teak (Tectona grandis L.f), mangium (Acacia mangium Willd.) and trembesi/monkeypod (Samanea saman Merr.) using water based polymer isocyanate (WBPI) as a binder. Six plies of wood combination species were laminated into final dimension of 6 cm × 12 cm × 300 cm. Each laminate was graded using Machine Stress Grading (Pantek, plank sorter) to determine its Modulus of Elasticity (MOE). Cross-section of two type of glulam beam was 6 cm × 12 cm, arranged of various widths and based on values of laminate MOE. Results show that the average and range value of the glulam density were 0.658 g/cm³ and 0.557-0.821 g/cm³, with the moisture content of 14.6% (13-16.8%). The average of the glulam modulus of elasticity and modulus of rupture were 75.51 (37.016-120.446) kg/cm² and 494 (145-750) kg/cm² respectively. The glulam made from teak has better MOE and MOR performances compared to those of mangium and trembesi. In general, the results showed that almost all of glulam beams tested meet requirement of JAS (Japanese Agricultural Standard) 2007 for structural glulam in moisture content, MOE, MOR, and shear strength. The glulam qualities can be classified into E65-E95-F225-F270, except for several species combination beams. Based on the strength classified and the ratio of S/W, the glulam can be used as a construction material except glulam teak-trembesi (preserved or unpreserved) and the unpreserved trembesi-trembesi. The three types of glulam can be utilized for the lightweight construction.
SIFAT BALOK KOMPOSIT KOMBINASI BAMBU DAN KAYU Abdurachman; Nurwati Hadjib; Jasni; Jamal Balfas
Jurnal Penelitian Hasil Hutan Vol. 33 No. 2 (2015): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2015.33.2.115-124

Abstract

Combination of bamboo and wood composite beam is one possible laminated product to be developed. Generally, the composite product of solid wood meet the strength requirement for construction. However, composite beam combination of bamboo and wood has not been studied intensively. This paper observes the properties of composite combination of three bamboo species: andong, petung and ori with jabon wood species using isocyanate glue and merbau extracts. In order to improve composite’s durability, bamboo and jabon wood were preserved using 7% of boric acid and borax. Result shows composite beam combination of bamboo and jabon wood bonded with isocyanate is found to be the best composition in term of physical and mechanical properties. The density of the composite beam is 0.64 g/cm³ in 9.70% moisture content. Modulus of Elasticity (MOE) 78,168 kg/cm², Modulus of Rupture (MOR) 384 kg/cm² and compression parallel to the glue line is 378 kg/cm².
PENGAWETAN WARNA KAYU TUSAM (Pinus merkusii) DAN PULAI (Alstonia sp.) DENGAN MENGGUNAKAN BAHAN DASAR DISINFEKTAN Barly; Agus Ismanto; Dominicus Martono; Abdurachman
Jurnal Penelitian Hasil Hutan Vol. 30 No. 2 (2012): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2012.30.2.155-162

Abstract

Wood color can vary much between species but the variations tends to be smaller within the same species. Noticeable deviations in color at timber surface or in the core of the same board my cause problems in timber trading or in final product's appearance. Undesirable discoloration often develops during wood drying process. The research aims to study natural color changes of Pulai (Alstonia sp.) and Pine (Pinus merkusii). Prevention of wood color change is undertaken by using active ingredients of benzylkonium chloride (A and D), phenol (B and C), creselic acid (E), sodium bypochlorite (F) and methylen-bis-thiocyanate (G). The treated wood samples together with their controls were then kept in three different conditions, i.e. conditioning room at 70 RH and temperature of 18 C, in the terrace and in the oven with temperatures of 60 C and 120 C. The test results demonstrate that the bigbest brightness (L") was obtained at Pulai the wood surface and inside the wood block using formulation of D, namely 87.3 and 89.3 with a total value of the brightness variation (AL) -6.7 and -4.7. However, the bigbest brightness of Pine wood was acchiered using formulation, namely 83.5 and 80.0 with a total variation of brightnest of -10.5 and-14.0. These value swere obtained from samples stored in low temperature and bumidity (air conditioned).
HONEYCOMBING AND DEFORMATION OF SIX WOOD SPECIES AND THEIR RELATIONSHIP WITH SEVERAL PHYSICAL PROPERTIES Karnita Yuniarti; Efrida Basri; Abdurachman
Jurnal Penelitian Hasil Hutan Vol. 35 No. 2 (2017): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2017.35.2.115-122

Abstract

It is presumed that the wood susceptibility to drying defects is related to several physical properties. This paper examines the drying defects: honeycombing and deformation of six wood species (trema, fast growing teak, bayur, jabon, angsana and lamtoro) during high temperature drying and analyses their relationship with initial moisture content, T/R shrinkage ratio and density. Terazawa method was used to examine the defect during high temperature drying. Result shows that after high temperature drying, lamtoro suffers the worst honeycombing (level 4-6), and fast growing teak deforms severely (level 4-6). Regression analysis shows multiple regression models using all physical properties as predictors provides better estimation on deformation and honeycombing than single-predictor regression models. The multiple regression model for each defect could explain 57.52% and 39.46% of variation in deformation and honeycombing, respectively.
PENGGOLONGAN 23 JENIS ROTAN INDONESIA BERDASARKAN KERAPATAN DAN KUAT TARIK SEJAJAR SERAT Abdurachman; Jasni; Rohmah Pari; Esti Rini Satiti
Jurnal Penelitian Hasil Hutan Vol. 35 No. 1 (2017): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2017.35.1.43-52

Abstract

Rattan utilization is mainly determined by its physical and mechanical characteristics of density and tensile strength, where the higher the physical and mechanical properties, the better quality of the cane. In South East Asia region including Indonesia, two of eight genera, Calamus and Daemonorops are classified into high economic value, however the physical and mechanical characteristic of lesser known rattan species has not been studied intensively. This paper classifies 23 of lesser known rattan species into four classes based on its density and tensile strength parallel to grain. Density was measured based on gravimetric method and tensile strength parallel to grain was tested using Universal Testing Machine (UTM). Results show that in term of physical and mechanical properties, one species belongs to class I (very good), twelve species are classified into class II(good) and III (moderate). Ten rattan species are grouped into class IV (poor). Among 23 rattan species, highly recommended commercial rattan species are Calamus holttumii Furt., Calamus nematospadix Becc., and Korthalsia celebica Becc. While, Calamus sp., Korthalsia rostrata Blume and Daemonorops sabut Becc are less recommended.
KARAKTERISTIK EK TRAK KULIT KAYU MAHONI SEBAGAI BAHAN PEREKAT KAYU Adi Santoso; Abdurachman
Jurnal Penelitian Hasil Hutan Vol. 34 No. 4 (2016): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2016.34.4.269-284

Abstract

Currenty, raw and supporting materials for adhesives industry such as NaOH, NH OH and methanol are available 4 in the domestic market, while raw material such as phenol and resorcinol derived from petroleum are reduced significantly, then, the use of raw material from other natural resources, like tannins derived from the tree bark is potentially developed. This paper explores and characterizes adhesive raw materials from mahogany bark (Swietenia mahagoni Jacq.) as phenolic source and tapioca as a source of carbohydrates. This paper also studies the copolymerization reaction between mahogany tannin extract with formaldehyde, as well as their mixtures with tapioca for adhesive application and its gluing quality. Pieces of mahogany barks were cut into chips measuring of approximately 2 x 1 x 0.1 cm, then soaked in o an extractor containing of hot water (70-80 C) with a ratio of bark chips : water = 1: 3. Extraction was undergone for three hours with continuous stirring before the mixture was cooled and filtered. The chip bark residue was repeatedly extracted using the same procedure for the second cycle. The obtained filtrates were then mixed with the first one and divided into two parts: crystallized in a water bath and the other part was used for adhesive manufacture. The results showeed that tannin extracted from the bark of mahogany was a dark reddish brown in colour similar with that of phenolic compounds with viscosity of 1.04 poise, specific gravity of 1.02 and the degree of acidity (pH) of 4.0. Extraction of mahogany bark yielded 8.10 % extract, with an average solid content of 2.01%, phenolic compounds level of 6,9%, and distribution of molecular weights ranging from 44-658. The optimum adhesive formulation of the extract mahogany bark was the mixture using of 0.25 mol of technical resorcinol with 15% tapioca, 1 mol technical formalin and 4% catalyst (NaOH 40%) of the total adhesive weight.
Co-Authors Achmad Supriadi ADI SANTOSO Aditya, Dwi Martha Nur Afif Aufan Marsay Agus Ismanto Alkaff, Firas Farisi Andianto Atiqah Nur Sa'idah Barly Breklen Risal Ary Wibowo Deandra Maharani Widiatmaja Dewanti, Adinda Tania Dominicus Martono Dzulqarnain Andira Efrida Basri Esti Rini Satiti Febrian Arya Adi Nugraha Inayatul Maftuchah Irfan Hanifa Izzatul Fithriyah Jamal Balfas Jasni Jongky Hendro Prajitno Karnita Yuniarti Laely Fika Nurrahma Lilik Setiyaningsih Luqman Hakim Andira Mentari Rahmah Adiyanti Nailur Rohmah Nasution, Muhammad Husni Fansury Netty Herawati Nur Mahda Yuda P. A. W Nurhabib, Asro Nurwati Hadjib Pamungkas, Dimas Bathoro Bagus Rejeki, Purwo Sri Rohmah Pari S, Delwi Novita Safira Aulia Salsabila Sakina Syamhadi, Maya Rahmayanti Tika Difa Saftri Titi Kalima Urfaza Atstsaqafi Viskasari P. Kalanjati Weinheimer, Anita Zara Yustika Ajeng Meysyaroh