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All Journal Jurnal Penelitian Hasil Hutan Jurnal Teknik Sipil Jurnal Ilmu dan Teknologi Kayu Tropis Jurnal Penelitian Hasil Hutan Jurnal Ilmu Kehutanan Jurnal Ilmu Kehutanan

Deded Sarip Nawawi

Departemen Hasil Hutan, Fakultas Kehutanan Dan Lingkungan, Institut Pertanian Bogor

Author-ID : 329205

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Energy Environmental Science Materials Science & Nanotechnology

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Pengaruh Komponen Kimia dan Ikatan Pembuluh terhadap Kekuatan Tarik Bambu Bahtiar, Effendi Tri; Nugroho, Naresworo; Suryokusumo, Surjono; Lestari, Dwi Premadha; Karlinasari, Lina; Nawawi, Deded Sarip
Jurnal Teknik Sipil Vol 23, No 1 (2016)
Publisher : Institut Teknologi Bandung

Abstrak. Bambu merupakan salah satu contoh material komposit alami yang tersusun atas beraneka ragam sel. Sel-sel fiber yang tersusun menjadi ikatan pembuluh diyakini merupakan sel yang paling bertanggung jawab terhadap kekuatan bilah bambu. Selain jumlah ikatan pembuluh, kekuatan tarik bambu juga dipengaruhi oleh kandungan komponen kimia dan bagian ruas/buku. Penelitian ini menunjukkan bahwa semakin banyak jumlah ikatan pembuluh, maka kekuatan tarik bambu semakin besar. Kandungan lignin meningkatkan kekuatan tarik pada bagian ruas secara proporsional (linier), bahkan kuadratik pada bagian buku. Peningkatan kandungan lignin dalam selang yang ditemukan dalam penelitian ini (33%) selalu meningkatkan kekuatan tarik bilah bambu sehingga titik balik maksimum tidak dapat ditemukan. Tingginya nilai korelasi kekuatan tarik dengan proporsi alpha selulosa terhadap holoselulosa pada bagian ruas memperlihatkan pentingnya peranan proporsi alpha selulosa tersebut, meskipun prosedur best subset regression tidak membacanya akibat terjadinya autokorelasi. Abstract. Bamboo is natural composite material which is built from many types of cells. Fibers cells which are bundled become vascular bundles have highest contribution toward the strength of bamboo split among others. Besides the amount of vascular bundles, the bamboo split strength is also determined by chemical component of cell walls and its position (internodes/node). This research reported that the tensile strength has positive correlation with the amount of vascular bundles. If the amount vascular bundles increase, then the tensile strength also increases. The increasing of lignin contents in cell wall proportionally and quadratically increases the tensile stress of internodes and node of bamboo split, respectively. This research did not found the maximum stationerÂ point of quadratic equation for lignin content effect toward bamboo split tensile strength, thus the tensile strength always increase along with the lignin content in this research range (<33%). Correlation value between tensile strength and ratio of alpha cellulose to holocellulose is high which prove that alpha cellulose highly contribute to the tensile strength even though best subset regression procedure could not identified this phenomenon because of its autocorrelation occurrence.

Perubahan Kadar Komponen Kimia pada Tiga Jenis Bambu Akibat Proses Steam dan Pembilasan (Chemical Components Changed in Three Bamboo Species Treated by Steaming and Washing Processes) Murda, Rio A; Nawawi, Deded S; Maulana, Sena; Maulana, Muhammad I; Park, Se-Hwi; Febrianto, Fauzi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 2 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Jurnal Ilmu dan Teknologi Kayu Tropis

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (38.454 KB)

Bamboo has good prospects for composite raw materials such as for Oriented Strand Board (OSB) product. Previous research has shown that steam and rinsing with water and 1% NaOH solution treatments of strand improved the properties of OSB, which might be caused by changing in the chemical components content of bamboo. This study aimed to determine the chemical components content change of sembilang bamboo (Dendrocalamus giganteus Munro), black bamboo (Gigantochloa nigrocillata Kurz.), and tali bamboo (G. apus (Bl.ex Schult.f.)) due to steam and rinsing treatment. The chemical components of bamboo were analyzed referring to the Technical Association of the Pulp and Paper Industry standards (TAPPI). The results showed that the most significant changes in the chemical components content of bamboo occured for holocellulose, hemicellulose, extractive contents, and pH values. The decreasing of hemicellulose, extractive contents, and increasing pH values due to the steam and 1% NaOH rinsing treatment may improve the adhesion quality of OSB.Keywords: bamboo, chemical components, steam modification, strand,

Pengaruh Komponen Kimia dan Ikatan Pembuluh terhadap Kekuatan Tarik Bambu Effendi Tri Bahtiar; Naresworo Nugroho; Surjono Suryokusumo; Dwi Premadha Lestari; Lina Karlinasari; Deded Sarip Nawawi
Jurnal Teknik Sipil Vol 23 No 1 (2016)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2016.23.1.4

Abstrak. Bambu merupakan salah satu contoh material komposit alami yang tersusun atas beraneka ragam sel. Sel-sel fiber yang tersusun menjadi ikatan pembuluh diyakini merupakan sel yang paling bertanggung jawab terhadap kekuatan bilah bambu. Selain jumlah ikatan pembuluh, kekuatan tarik bambu juga dipengaruhi oleh kandungan komponen kimia dan bagian ruas/buku. Penelitian ini menunjukkan bahwa semakin banyak jumlah ikatan pembuluh, maka kekuatan tarik bambu semakin besar. Kandungan lignin meningkatkan kekuatan tarik pada bagian ruas secara proporsional (linier), bahkan kuadratik pada bagian buku. Peningkatan kandungan lignin dalam selang yang ditemukan dalam penelitian ini (33%) selalu meningkatkan kekuatan tarik bilah bambu sehingga titik balik maksimum tidak dapat ditemukan. Tingginya nilai korelasi kekuatan tarik dengan proporsi alpha selulosa terhadap holoselulosa pada bagian ruas memperlihatkan pentingnya peranan proporsi alpha selulosa tersebut, meskipun prosedur best subset regression tidak membacanya akibat terjadinya autokorelasi. Abstract. Bamboo is natural composite material which is built from many types of cells. Fibers cells which are bundled become vascular bundles have highest contribution toward the strength of bamboo split among others. Besides the amount of vascular bundles, the bamboo split strength is also determined by chemical component of cell walls and its position (internodes/node). This research reported that the tensile strength has positive correlation with the amount of vascular bundles. If the amount vascular bundles increase, then the tensile strength also increases. The increasing of lignin contents in cell wall proportionally and quadratically increases the tensile stress of internodes and node of bamboo split, respectively. This research did not found the maximum stationer point of quadratic equation for lignin content effect toward bamboo split tensile strength, thus the tensile strength always increase along with the lignin content in this research range (<33%). Correlation value between tensile strength and ratio of alpha cellulose to holocellulose is high which prove that alpha cellulose highly contribute to the tensile strength even though best subset regression procedure could not identified this phenomenon because of its autocorrelation occurrence.

Perubahan Kadar Komponen Kimia Bambu Kuning akibat Modifikasi Steam dan Pembilasan (Change of Chemical Component Content in Kuning Bamboo due to Steam and Rinsing Modification) Muhammad I Maulana; Abi K Arif; Deded S Nawawi; Nyoman J Wistara; Siti Nikmatin; Fauzi Febrianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 17, No 1 (2019): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Bamboo is a forest product that has potential as substitution of wood for the raw material of any products of forest products processing. Oriented Strand Board (OSB) made from bamboo is more superior compared to the wood one in physical and mechanical properties. Steam and rinsing treatments can improve the OSB properties that occur due to changes in the chemical components of bamboo, but research on the effect of the treatment has not been done for kuning bamboo. The objective of this reseach were to identify the changes of chemical components content in kuning bamboo (Bambusa vulgaris var. striata.) due to steam, steam with distillation water rinsing and steam with 1% NaOH rinsing treatments. The chemical component of bamboo was analyzed according to Technical Association of the Pulp and Paper Industry (TAPPI) standards. The results showed that alpha-cellulose and lignin contents were relatively stable. In addition, hollocellulose, hemicellulose and extractives decreased, while the pH value was increased by treatments. The decreased of hemicellulose and extractive substances, as well as increased pH values can improve the quality of OSB produced.

Extractives Content and Shrinkage of Nangka (Arthocarpus heteroohyllus) and Mangium (Acacia mangium) Woods Deded S Nawawi; Satriyo H Wicaksono; Istie S Rahayu
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 1 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Extractives may contribute to dimensional stability of wood, physically and chemically, due to its heterogeneous of compounds. The objective of this research was to determine the extractives content of nangka (Arthocarpus heterophyllus) and mangium (Acacia mangium) woods and its influence on wood shrinkage. Extraction of wood was carried out by sokhlet method of ethanol and ethanol:benzene (1:2) for 12 h, and hot water for 3 h, respectively. The tangential, radial, and longitudinal shrinkage both of extracted and fresh wood samples were compared. The removal of ethanol, ethanol:benzene (1:2), and hot water soluble extractives increased tangential and radial shrinkage of wood, indicating that wood extractives was a significant factor influencing dimensional stability of wood. Extractive may influenced wood shrinkage physically as a bulking agent, and chemically by its contribution to hygroscopic properties of wood. However, longitudinal shrinkage of wood was not affected by extractives content which was, probably, due to very small of wood shrinkage in longitudinal direction. In addition, the basic density of wood was not affected by extractives content.Key words: Acacia mangium, Arthocarpus heterophyllus, bulking agent, extractives, wood shrinkage

Antifungal Activity of Faloak (Sterculia comosa Wallich) Extractives Fabianus Ranta; Deded S Nawawi; Eko S Pribadi; Wasrin Syafii
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 1 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Faloak (Sterculia comosa Wallich) is a specific species of dry land that has potential antifungal. This study aims to determine the toxicity of barks, leaves, and seeds extracts as an antifungal, and to identify its bioactive compound. The extracts were prepared by multi stage maceration method. Antifungal activity was tested by agar well diffusion method, and minimum inhibition concentration (MIC) and minimum fungicide concentration (MFC) by two-fold serial dilution method were measured. Bioactive compound of active fraction were identified by Liquid Chromatography Mass Spectroscopy (LCMS), Fourier Transform Infrared (FTIR), and Nuclear Magnetic Resonance (NMR). Results showed that the diethyl ether (DE) fraction of seeds is more effective in inhibiting of Candida albicans growth, than the other fractions. Subfraction of DE7 has a higher potency in inhibiting the growth of of Candida albicans. Based on the analysis by LCMS, FTIR and proton NMR, the DE7 sub fractions contain 3-hydroxyoctadecanoic acid (C18H36O3), which is suggested as a mainly compound responsible for antifungal activity.Key words: antifungal, Candida albicans, extractive, Sterculia comosa

Papan Partikel Berperekat Likuida Tandan Kosong Sawit Difortifikasi dengan Fenol Formaldehida (Particleboard Bonded with Phenol Formaldehyde-Fortified Oil Palm Empty Fruit Bunch Liquid ) Adesna Fatrawana; Surdiding Ruhendi; Sena Maulana; Deded S Nawawi; Fauzi Febrianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 14, No 1 (2016): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/jitkt.v14i1.353

Lignocellulosic waste from oil palm industry is a potential versatile resource. It can be used as raw material of bio-composite, pulp and paper, bioenergy, and many chemicals products. The aimed of this research was to investigate the characteristics of particleboard from oil palm empty fruit bunch (EFB) bonded with phenol formaldehyde (PF)-fortified oil palm EFB liquid adhesive. Fortification level of EFB liquid was varied at 5, 10, and 15%. The adhesive level of 10, 15, and 20% were used for particleboard manufactures with target density of 0.7 g cm-3. The particleboard quality was evaluated based on its physical (density, moisture content, thickness swelling) and mechanical properties (modulus of elasticity, modulus of rupture, internal bonding, and screw holding resistant) according to JIS standard. In order to improve bonding quality, the EFB particles was treated by hot water at 100 oC for 6 h. The results showed that the quality of particleboard increased by addition of fortifier as well as adhesive level, except for thickness swelling. The best particleboard properties was produced with 20% adhesive level and 15% fortifier, however, physical and mechanical properties of most particleboard produced did not satisfy the JIS A 5908:2003 requirement.Keywords: empty fruit bunch, fortifier, liquid adhesive, oil palm, particleboard, phenol formaldehyde

Teak Extracts as a Delignification Catalyst of Soda Pulping Deded S Nawawi; Suyono Suyono; Anjar A Widyorini
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 2 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Teak wood (Tectona grandis) extracts which contain mainly 2-methylanthraquinone (natural MAQ) was utilized as an aditif of modified soda pulping. Dissolution of lignin and polysaccharides during initial delignification stage of cooking at 120 oC for 60 min, were analized. The additions of extracts were 0.05, 0.10, 0.15, and 0.20% of MAQ equivalent. Teak extracts play as a catalyst of delignification and polysaccharides stabilization, efectively. By addition of teak extract, the delignfication selectivity during initial stage of soda pulping increased significantly, even; it was much more effective than that of commercial anthraquinone. Accordingly, teak extracts which consist of 2-methylanthraquinone seems to be promising natural aditif for the alkaline pulping.Key words: delignification, soda pulping, teak extract, tectoquinone

Larvicide Activity of Teak Wood Powder and Its Extract to Dengue Fever Mosquito Deded S Nawawi; Anne Carolina; Cahyo Werdiningsih
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 2 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Dengue fever is transmitted to human by Aedes aegypti mosquito. Tectoquinone of teakwood extractives could be developed as natural larvicide for the mosquito due to its antifungal and insecticidal activities. However, larvicidal activities of Indonesian teak wood extract have not been investigated to a greater exten. In the present works, the larvicidal activity of teak wood extract and wood powder against fourth-instar larvae of A. aegypti was examined for different concentration of 2-methylanthraquinone based. Heartwood sample of 45 year old tree from East Java was used for the experiment. Isolation of extractives was carried out with ethanol: toluene (1:1 v/v). The concentration of 2-methylanthraquinone of the extract was determined by Pyr-Gas Chromatography Mass Spectrometry (Pyr-GC-MS). Larvacidal activity was expressed as a mortality of larva and lethal concentration (LC50 and LC90). The 2-methylanthraquinone was conformed as the main compound of teak wood extract. Teak wood extract was an effective larvicide against A. aegypti larvae. The LC50 and LC90 of the extract were found at 7.99 and 11.87 μg ml-1 of 2-methylanthraquinone, respectively. Higher lethal concentration was required by wood powder, i.e. with LC50 and LC90 of 849.30 μg ml-1 and 1051.10 μg ml-1, respectively.Keywords: Aedes aegypti, extractives, larvicide, Tectona grandis, tectoquinone

Pengaruh Modifikasi Steam dan Pembilasan NaOH terhadap Keasaman Enam Jenis Bambu Muhammad I. Maulana; Marwanto Marwanto; Sena Maulana; Aginsa T. Putri; Nicken O Putri; Denni Prasetia; Deded S. Nawawi; Siti Nikmatin; Fauzi Febrianto; Nam-Hun Kim
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 18, No 1 (2020): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/jitkt.v18i1.540

Perlakuan steam dan bilas NaOH 1% telah diketahui meningkatkan sifat fisis dan mekanis Oriented Strand Board (OSB) bambu. Peningkatan tersebut disebabkan oleh menurunnya kadar zat ekstraktif dan komponen berbobot molekul rendah lainnya pada bambu. Selain itu, steam dan bilas NaOH 1% juga diduga mempengaruhi keasaman bambu. Penelitian ini bertujuan untuk menentukan perubahan keasaman yang terjadi akibat perlakuan steam dan bilas NaOH 1% pada enam jenis bambu Indonesia. Enam jenis bambu meliputi bambu andong, betung, tali, ampel, kuning, dan hitam digunakan pada penelitian ini. Sampel bambu dicacah hingga berbentuk partikel dan diberikan dua perlakuan berbeda yaitu steam dan steam + bilas NaOH 1%. Partikel bambu kemudian digiling hingga didapatkan serbuk berukuran 40-60 mesh. Serbuk bambu diekstrak dengan air panas selama 1 jam. Nilai pH filtrat ekstrak diukur menggunakan pH meter. Ekstrak kemudian dititrasi dengan larutan H2SO4 0,025 N hingga pH 4 dan larutan NaOH 0,025 N hingga pH 10. Jumlah larutan penyangga yang ditambahkan ke dalam ekstrak dinyatakan sebagai kapasitas penyangga asam dan basa. Hasil penelitian menunjukkan bahwa jenis bambu dan perlakuan berpengaruh terhadap nilai pH dan kapasitas penyangga. Nilai rata-rata pH enam jenis bambu berkisar 5,20-6,67 dan meningkat setelah perlakuan steam dan Steam + bilas NaOH 1% berturut-turut menjadi 5,97-6,78 dan 7,02-7,63. Kapasitas penyangga asam dan basa enam jenis bambu masing-masing berkisar 0.404-0.525 mmeq dan 0.095-0.1750 mmeq dan meningkat setelah perlakuan steam dan Steam + bilas NaOH 1%.

Co-Authors Abi K Arif Adesna Fatrawana Aginsa T. Putri Anak Agung Istri Sri Wiadnyani Anjar A Widyorini Anne Carolina Benny Murwentiano Cahyo Werdiningsih D R Agungpriyono Deni Darmawan Denni Prasetia Devi Armilasari Dewi R Agungpriyono Dwi P Lestari Dwi Premadha Lestari Dwi R. Endriadilla Effendi Tri Bahtiar Eko S Pribadi Elvara D Satria Fabianus Ranta Fauzi Febrianto I Nyoman Jaya Wistara I Wayan Darmawan IETJE WIENTARSIH Istie Rahayu Itje Wintarsih L N Sutardi Lestari, Dwi Premadha Lina Karlinasari Marwanto Marwanto Maulana, Muhammad I Maulana, Sena Muflihati Muflihati Muhammad Iqbal Maulana Murda, Rio A Nam-Hun Kim Naresworo Nugroho Nareworo Nugroho Nicken O Putri Nopen Meisaroh Park, Se-Hwi Rahmi Mauladdini Rio A Murda Rita K Sari Rita K Sari Rita Kartika Sari Rynaldo Davinsy Satriyo H Wicaksono Se-Hwi Park Silmi Mariya Siti L Gusvina Siti Nikmatin Subangkit, Mawar Surdiding Ruhendi Surjono Suryokusumo Suryokusumo, Surjono Tasya Saskia Trisna PRIADI Vetnizah Juniantito Wahyu Hidayat Wasrin Syafii dan Kurnia Sofyan Gustan Pari Buchari

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