Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

0.659

P-Index

This Author published in this journals

All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Teknologi Industri Pertanian Jurnal Ilmu dan Teknologi Hasil Hutan Reaktor International Journal of Renewable Energy Development BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Penelitian Hasil Hutan Jurnal Riset Industri Jurnal Ilmu dan Teknologi Kayu Tropis Teknologi Indonesia Jurnal Sylva Lestari Makara Journal of Technology Jurnal Ilmu Kehutanan International Journal of Renewable Energy Development Jurnal Penelitian Hasil Hutan

I Nyoman Jaya Wistara

Department Of Forest Products, Faculty Of Forestry And Environment, IPB University

Author-ID : 290604

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Veterinary

Published : 43 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3 4 5

Pengaruh Durasi Steam terhadap Kualitas Arang Aktif Limbah Sagu (The Effect of Steam Duration on Quality and Characteristics of Activated Charcoal of Sago Waste) Herman Siruru; Wasrin Syafii; Nyoman J Wistara; Gustan Pari
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 2 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Sago waste is a potential biomass that can be used as active charcoal raw material. The objectives of this research were to know the effect of steam duration on quality and characteristics of activated charcoal of sago waste. Carbonization process was carried out at 400 ⁰C for four hours, then activation was carried out at 100 ml bar steam pressure, at a temperature of 800 ⁰C with variations of steam duration 60, 80 and 100 minutes and activation without steam, only heating for 60 minutes. The proximate test used the SNI standard, observed the functional group using Fourier Transform Infrared Spectrophotometer (FTIR) and observed the active charcoal structure using X-ray diffraction (XRD). The results showed that the yield, moisture content, volatile, ash content, fixed carbon, iodine absorption of activated charcoal of sago bark and sago soft core were, respectively, 39.22–84.10%, 4.63–6.39%, 3.03–5.06%, 7.74–33.43%, 61.54–88.63%, 158.60–972.60 mg g-1. XRD analyzes showed that the degree of crystalline activated charcoal of sago bark waste with the highest steam time of 100 minutes (35.98%) compared with the degree of crystalline other activated charcoal is only about 20.57-7.30%. FTIR spectroscopy results from activated charcoal of sago waste also identified nitrogen compounds such as NO2 at wave numbers 1370-1390 cm-1; 1530-1560 cm-1; 1620-1660 cm-1 and phosphorus compounds such as P-S at 200-500 cm-1 wave number; P=S at the wave number 500-850 cm-1.

Trace Elements Content of Mangium Pulp throughout ECF Bleaching Stages as Measured by ICP Nyoman Wistara; Devi Nurmala
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 1 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The fate of metals in pulp of the five years old mangium wood (Acacia mangium Wild) during bleaching process was investigated. The wood was divided into tree division, i.e. bottom, middle and upper divisions. The wood was chipped and kraft pulped to achieve a kappa number of 14 + 0.5. The resulting pulps were then bleached following an elementally chlorine free (ECF) method of D0, EO, D1, D2 and P sequences. The measurement of metals content was carried out with Inductively Coupled Plasma (ICP) type Optical Emission Spectrometry (OES) Optima 4300DV. Brightness and viscosity of bleached pulps were measured in accordance with TAPPI T 525 om - 92 and TAPPI T 230 om-89 standard procedures, respectively. It was found that, metals content of five years old Acacia mangium tended to increase from the bottom to the upper divisions of the stem. Beyond the EO stage, the content of Mn reduced to below detrimental limit required in peroxide bleaching, which is of 1 ppm. However, the content of Cu and Fe of pulp from every stage of bleaching sequences were much higher than their detrimental limit, i.e. 0.5 ppm and 2 ppm, respectively. Metals content were also found to reduce brightness gain in ECF bleaching.Keywords: Acacia mangium, brightness, ECF bleaching, metals, viscosity

Perubahan Kadar Komponen Kimia Bambu Andong akibat Perlakuan Steam (Change of Chemical Components Content in Andong Bamboo due to Steam Treatment) Muhammad I Maulana; Deded S Nawawi; Nyoman J Wistara; Rita K Sari; Siti Nikmatin; Sena Maulana; Se-Hwi Park; Fauzi Febrianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 1 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Steam and rinsing treatment with water and 1% NaOH solution of andong bamboo strands have been known to improve physical and mechanical properties of its oriented strand board (OSB). The improvement of bamboo OSB properties might be caused by the change of chemical components content during steam and rinsing process. This study aims to measure the changes of chemical components content in andong bamboo (Gigantochloa pseudoarundinacea) due to steam treatment and rinsing with water or sodium hydroxide solution. Samples was taken from andong bamboo stem without bark and node part. The treatments of samples were steam at 126 ° C for 1 hour, steam and rinsing with water, and, steam and rinsing with 1% NaOH, respectively. Air-dried samples were, then, subjected to mill in order to get 40-60 mesh particles size, which was used for chemical components analyses. The results showed that steam and rinsing with water or 1% NaOH solution treatment reduced hemicellulose and extractive contents (dissolved in cold water, hot water, ethanol-benzene and NaOH 1% solution), whereas alpha-cellulose and lignin were relatively stable. Steam and rinsing treatment generally increased the pH value of bamboo samples.

Morphology of Microfibrillated Cellulose from Primary Sludge Iwan Risnasari; Fauzi Febrianto; Nyoman J Wistara; Sucahyo Sadiyo; Siti Nikmatin
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 2 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Sewage sludge is the largest waste produced from the pulp and paper mill, consist of fibers (50-60%) and inorganic materials.The aim of this study was to obtain the microfibrillated cellulose of sludge through extraction and cellulose disintegration. The cellulose disintegration conducted by a combinations of the refining and ultrasonication treatment. The results showed that after extraction process the mass of C and O were increased. Conversely the mass of Al, Ca, Si and S were decreased. The mass of C and O was further increased after refining and ultrasonication treatment. The process of extraction on sludge could remove lignin, hemicellulose and inorganic materials to obtain more pure cellulose. Cellulose disintegration by a combination of the refining 30 times followed by ultrasonication for 120 min produced microfibrillated cellulose with diameter of 284 nm.Key words: extraction, microfibrillated cellulose, morphology, sludge

Ketahanan Oriented Strand Board Bambu Betung dengan Perlakuan Steam pada Strand terhadap Cuaca (Durability of Oriented Strand Board Prepared from Steam -treated Betung Bamboo to Natural Weathering) Sena Maulana; Muhammad QA Damanik; Marwanto Marwanto; Muhammad I Maulana; Adesna Fatrawana; Ihak Sumardi; Nyoman J Wistara; Fauzi Febrianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 17, No 1 (2019): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Penelitian ini bertujuan untuk mengevaluasi ketahanan oriented strand board (OSB) dari bambu betung (Dendrocalamus asper) (BOSB) dengan perlakuan steam pada strand terhadap cuaca. Strand diberi perlakuan steam pada suhu 126 ºC di bawah tekanan 0,14 MPa selama 1 jam. Tiga lapis BOSB dibuat dengan kerapatan target 0,7 g cm-3 yang direkat dengan perekat fenol formaldehida (PF) dengan konsentrasi 8%. Parafin ditambahkan sebanyak 1% dari berat kering oven strand. Bamboo oriented strand board dipaparkan pada cuaca terbuka di Dramaga, Kabupaten Bogor Jawa Barat (6°34’15.72’’Selatan 106°44’17.30’’Timur). Evaluasi sifat fisis dan mekanis BOSB sebelum dan sesudah dipaparkan di udara selama 2 dan 3 bulan dilakukan berdasarkan standar JIS A 5908:2003. Penentuan nilai nisbah retensi MOE dan MOR dilakukan dengan membandingkan nilai MOE dan MOR sebelum dan sesudah pemaparan. Hasil penelitian menunjukkan bahwa perlakuan steam pada strand dapat meningkatkan stabilitas dimensi dan sifat mekanis BOSB. Pemaparan BOSB pada cuaca terbuka dapat menurunkan stabilitas dimensi dan kekuatan BOSB. Ketahanan BOSB dengan perlakuan steam pada strand terhadap pemaparan alami lebih tinggi dibandingkan dengan tanpa perlakuan steam.

The Properties of Bamboo and Old Corrugated Containers Pulp Mixture Nyoman J Wistara; Dwi A Purnamasari; Dian A Indrawan
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 2 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The objective of this research was to determine the optimum freeness of virgin bamboo pulp capable of increasing pulp mixture strength and decreasing the quantity of old corrugated containers (OCC) pulp substitution in the mixture. OCC was soaked for 7 days and disintegrated afterward. Soda pulping of bamboo (Gigantochloa apus) was carried out following the pulping parameters of 35% NaOH charge, L:W of 4:1, maximum temperature of 170 oC and total cooking time of 3 h. Kappa number and pulping yield were determined based on TAPPI T236 cm-85 standard. Bamboo and OCC pulp was bleached following the method of D0ED1D2. Bleached bamboo pulp was beaten up to the freeness of 100, 200, 300, and 400 ml CSF. While that of OCC was up to 400 ml CSF only. The compositions of bamboo and OCC pulp mixture (B:K) were 0:100, 20:80, 40:60, 60:40, 80:20, and 100:0. Physical and optical properties of pulp mixture were determined based on TAPPI T205 sp-02 standard. The pulp composition of (B:K) 20:80 at freeness level of 400 ml CSF was resulted in the highest strength properties based on Duncan scoring. Pulp beating was able to decrease the composition of bamboo pulp in pulp mixture while retaining the strength properties.Key words: bamboo, beating, freeness, old corrugated containers, pulp composition

Characterization of Cat’s Eye Dammar for Revision of Indonesia National Standard Rita K Sari; Nyoman J Wistara; Arif Wijayanto; Totok K Waluyo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 1 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The present works was aimed to examine the concordance between trader quality classification and related SNI classification on dammar resin. The quality of six quality classes of dammar resin by trader classification was evaluated based on SNI 2900-1-2012 on visual classification and SNI 01-2900-1999 on physical and chemical characteristics, and then the resulting data were analyzed with ANOVA. The quality concordance of dammar resin based on trader classification with these of SNI for visual appearance and the size of agglomeration was 50 and 75-94%, respectively, and these of insolubility in toluene, melting point, ash content, and acid number were 61, 72, 11, and 100%, respectively. The characteristics of dammar resin for the a, b, and c quality classification were the same for the Krui traders, BKG Ltd., and WGM Ltd. However, they were different for the lower quality classification of d, e, and powder. It was also found the existence of dammar resin with characteristic values beyond the range of these established by SNI. SNI should not classify dammar resin quality based on visual appearance, but merely based on its physical and chemical characteristics. Physical and chemical characteristics values required by SNI should be revised.Key words: cat’s eye dammar, Indonesia National Standard, physical and chemical characteristics, quality classification, Shorea javanica

Aktivitas Antioksidan Ekstrak Daun Surian, Mangium, dan Pegagan serta Kombinasinya dalam Formula Krim (Antioxidant Activities of Mangium, Surian, and Pegagan Leaf Extracts and Its Combination in Cream Formulas) Rita K Sari; Nyoman J Wistara; Deded S Nawawi; Itje Wintarsih; Dewi R Agungpriyono; L N Sutardi; Mawar Subangkit; Vetnizah Juniantito
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 14, No 2 (2016): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The simplicia properties of toona (TS), mangium (AM), and centella (CA) leaves and antioxidant activities of their ethanolic leave extract and their combinations in cream formulas were examined in the present reserach. The ethanolic extracts were partitioned with n-hexane and ethyl acetate. The antioxidant activity of the fractions and their combinations were tested against DPPH. The best combination was formulated in F1, F2, and F3 cream formulas with 0.1, 0.18, and 0.36% of extract, respectively. The formulas antioxidant activity was then tested. The results showed that the water content, ash content, and acidic insoluble ash content of TS, AM, and CA simplicias were ±10%, 3.8-9.7%, and 0.9-1.2% respectively. The yields of n-hexane (FN), ethyl acetate (FEA), and residues (FR) fractions were 6-9, 2, and 5-6% respectively. The antioxidant activity of FEA, FR, and FN was very strong, strong, and weak to inactive, respectively. The best combination was the mixture of 2/3CA, 1/6AM, and 1/6TS (IC50 9 μg ml-1). The antioxidant activity of all cream formulas were higher than refered commercial cream. The IC50 values of formula 1, 2, and 3 were 1109, 596, and 202 μg ml-1, respectively, while the IC50 of refered commercial cream was 2372 μg ml-1.Keywords: antioxidant, centella, cream, extract, mangium, toona

Peningkatan Sifat Papan Partikel Sengon dengan Perlakuan Perendaman Air Dingin (Improvement the Properties of Particleboard Made from Sengon with Cold Water Immersion Treatment) Marwanto Marwanto; Sena Maulana; Muhammad I Maulana; Nyoman J Wistara; Siti Nikmatin; Fauzi Febrianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 2 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The objectives of this research is to evaluate the physical and mechanical properties of particle board made from sengon and mangium woods treated with cold water immersion. Particles of sengon and mangium immersed in cold water for 24 hours. The particles of sengon and mangium are combined with a ratio of 100: 0; 0: 100; 75:25; and 50:50. Particle boards are made in size (30x30x0,9) cm3 with target densities of 0.7 g cm-3. The particle board was binded with methylene diphenyl diisocyanate (MDI) adhesive at 10% content and hot press at 140 °C with 25 kgf cm-2 for 7 minutes. The physical and mechanical properties of particle board are evaluated according to JIS A 5908-2003 standard. The physical and mechanical properties of particle board were much affected by particle combination and cold water immersion treatment. The physical (i.e density, moisture content, water absorption (WA), and thickness swelling (TS)) and mechanical properties (ie. modulus of elasticity (MOE), modulus of rupture (MOR), and internal bonding (IB)) were evaluated. The results showed that cold water immersion improved dimensional stability (WA and TS) of particle board obtained. However, some mechanical properties decreased.

Sifat Dasar Tanaman Mengkuang (Pandanus artocarpus Griff) Basic Properties of Mengkuang Plant (Pandanus artocarpus Griff) Hikma Yanti; Wasrin Syafii; Nyoman J Wistara; Fauzi Febrianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 1 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The aim of this research were to determine the extractive, α-cellulose, hemicellulose, lignin, and sugar composition of hemicelluose for raw materials and pulp of mengkuang (Pandanus artocarpus Griff) leave and stem. Delignification was carried out by alkaline process with NaOH 20% and 25% at 170 oC for 4 h. The chemical and physical analyses were done using Fourier Transform Infrared Spectroscopy, X-Ray Diffraction, High Performance Liquid Chromatography, and Scanning Electron Microscopy. The leaves and stem of mengkuang containing extracts of 6.99% and 4.80%, cellulose 35.02% and 40.29%, hemicellulose 33.12% and 31.19%, lignin 29.10% and 26.84%, respectively. The syringyl, guaiacyl, and p-hydroxyphenil composition in mengkuang leaves and steam were 40.00%, 41.82%, 19.24% and 39.81%, 41.82%, 18.37%. The hemicellulose in the leaves and stem consisted of glucose, arabinose, xylose, mannose, rhamnose, and galactose. The highest pulp yield (41.71%) was obtained from pretreatment of 20% NaOH in the stem. Pulp of leaves and stem contained α cellulose, hemicellulose, and total lignin content of 88.19%, 7.95%, 14.36%, and 88.27%, 10.17%, 13.83%. The highest crystallinity of pulp (70.00%) was obtained from the stem at a concentration of 25% NaOH, and the lowest (58.18%) was obtained from the leaves at a concentration of 25% NaOH.

Co-Authors Abi K Arif Adesna Fatrawana Adesna Fatrawana Akhirudin Maddu Akhirudin Maddu Anak Agung Istri Sri Wiadnyani Arif Wijayanto Aris Purwanto Bambang Prasetya Bambang Prasetya Bambang Prasetya Byantara D Purusatama D R Agungpriyono Deded Sarip Nawawi Devi Nurmala Dewi R Agungpriyono Dian A Indrawan Dwi A Purnamasari Elias Elias . Evalina Herawati Evelin Yustiana Fauzi Febrianto Gokma Silaban Gustan Pari Gustan Pari Gustan Pari Gustan Pari Gustan Pari Hania Purwitasari Hanif N HIDAYAH Hari Wijayanto Herman Siruru Herman Siruru Hikma Yanti Hotman Effendi IETJE WIENTARSIH Ihak Sumardi Ihak Sumardi Istie Rahayu Itje Wintarsih Iwan Risnasari Khaswar Syamsu L N Sutardi Lina Karlinasari Lucky Risanto Luthfi Hakim Martua YS Nababan Marwanto Marwanto Marwanto Marwanto Marwanto Marwanto, Marwanto Maulana, Mohammad I Maulana, Sena Merry Sabed Min Lee Miranti Dewi Muhammad Iqbal Maulana Muhammad QA Damanik Nopen Meisaroh Philippe Gérardin Posma R.P . Posma R.P, Posma Purnawati, Renny Rahmi N Hidayah Rita K Sari Rita Kartika Sari S Heris Anita, S Heris Saptadi Darmawan Saptadi DARMAWAN Se-Hwi Park Sehwi Park Siruru, Herman Siti Nikmatin Subangkit, Mawar Sucahyo Sadiyo Sudirman Sudirman Totok K Waluyo Vera Junita Sitanggang Vetnizah Juniantito Wasrin Syafii Wawan kartiwa Haroen Wawan kartiwa Haroen, Wawan kartiwa Widya Fatriasari Widya FATRIASARI Wulan Starini Yuhana Rahayu Yusup AMIN

Title

Found 43 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 43 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 43 Documents
Search