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All Journal ARRUS Journal of Engineering and Technology Jurnal Wana Tropika Proceedings Series on Physical & Formal Sciences Jakadimas Jurnal Wana Tropika
Woesono, Hastanto Bowo
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KAJIAN DIAMETER - PERSENTASE KAYU TERAS TERHADAP KUALITAS KAYU JATI (Tectona grandis Linn. F) DARI HUTAN RAKYAT GUNUNG KIDUL Woesono, Hastanto Bowo
Jurnal Wana Tropika Vol 1 No 1 (2011)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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The research is aim to determine of influence diameter and percentage heartwood to physical and mechanical of teakwood properties. This research uses wood diameter factor, which comprises 3 levels of 15-21 cm, 22-28 cm and 29-35 cm and the percentage of heartwood that comprises 3 levels of 25-45%, 45-65% and 65-85%. These factors were then designed a randomized complete with factorial pattern. Observed parameters are the physical properties of wood (moisture content, specific gravity, and dimensional changes) and the mechanical properties of wood (static bending strength, compression strength parallel to grain, compression strength perpendicular to grain and shear strength). The result of the research shows that diameters factor affect significantly on air dry moisture content, longitudinal shrinkage from air dry to oven dry condition, Modulus of Elasticity (MOE) and compression strength parallel to grain. The percentage of heartwood factor affects very significantly on moisture content, tangential swelling from air dry to wet condition and Modulus of Elasticity. The interaction factor between diameters and percentage of heartwood also affects very significantly on specific gravity and shear strength. The rate of air dry moisture content is 13.88%; specific gravity is 0.65; MOE is 108.13 (1000kg/cm2); MOR is 1243.83 kg/cm2; compression strength parallel to grain is 569.41 kg/cm2; compression strength perpendicular to grain is 122.80 kg/cm2; and shear strength is 79,1602 kg/cm2. The result of the research show also that wood has the highest diameters is not always the best of quality (physical and mechanical properties) but, the highest percentage of heartwood to trend has the better teakwood quality specially physical properties. Key Words : diameters, the percentage of heartwood, community forest teakwood quality
PENGARUH TEMPERATUR DAN PENAMBAHAN METANOL PADA PROSES ESTERIFIKASI - TRANSESTERIFIKASI TERHADAP SIFAT-SIFAT MINYAK NYAMPLUNG Woesono, Hastanto Bowo; Webliana, Kornelia
Jurnal Wana Tropika Vol 1 No 2 (2011)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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The problem which has to be solved when using nyamplung oil (Calophyllum inophyllum) as an alternative fuel is the excessive content of free fatty acid in the oil. One way of reducing the free fatty acid in the oil is by esterification and tranesterification process. Hence, the research is conducted to identify the effect of temperature and methanol addition on the esterification and transesterification processes on the nature of nyampung oil and to assess the composing component of nyamplung oil. The research was conducted in the laboratory of Forest Yield Technology and central laboratorium of INSTIPER. The steps included extraction, deguming, esterification I, esterification II and transesterification with the temperature var iation of 60° C, 80° C, and 100° C and the mol comparison of nyamplung oil of 4:1, 5:1 and 6:1, and the examined parameters were water content, viscosity, acid level, soap level, free fatty acid content and iod level. The result indicated that the temperature treatment and methanol addition significantly affected the nature of nyamplung oil after the tranesterification. The analysis of nyamplung oil nature after the esterification I and esterification II indicated that the water contents were 0.38 and 0.21 %, the densities were 0.9630 and 0.9325 g/ml, the viscosities were 110 and 74.5 cP, the acid levels were 58.6893 and 31, 4359 KOH/g. the contents of free fatty acid were 29.5016 and 15.8017, the soaping levels were 192, 4127 dan 180, 2165 mg KOH/g, the iod levels were 68.7259 and 65. 9123 mg/g with the appearance of esterification I of dark and aqueous and esterification 11 reddish and aqueous. the nature of nyamplung oil after the transesterification process was that the water content was 0.1501%, the density was 0.8832 Wml, the viscosity was 51.1296 eP, the acid level was 9.8935 KOH/g, the free fatty acid content was 5.0168 %, the soaping level was 172.9321 KOH/g, the iold level was iod 77.4985 mg/g, with the appearance of yellow and aqueous. Keywords: Temperature, methanol comparison, transesterification process, nyamplung oil properties
Studi Budidaya Tanaman Herbal pada Hutan Rakyat di Kecamatan Samigaluh, Kabupaten Kulonprogo, Yogyakarta Prijono, Agus; Woesono, Hastanto Bowo
Jurnal Wana Tropika Vol 2 No 2 (2012)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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Kajian Kualitas Minyak Kayu Putih Hasil Perlakuan Bahan Baku dan Waktu Penyulingan Hadi, Didik Surya; Woesono, Hastanto Bowo
Jurnal Wana Tropika Vol 3 No 1 (2013)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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Estimasi Cadangan Karbon yang Tersimpan di Hutan Rakyat Gunung Kidul Woesono, Hastanto Bowo; Herin, Maria C.P
Jurnal Wana Tropika Vol 4 No 1 (2014)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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PENGARUH SUHU DAN LAMA WAKTU TAHAPAN ESTERIFIKASI TERHADAP SIFAT FISIK DAN KIMIA MINYAK NYAMPLUNG (Callophylum inophyllum Oil) Woesono, Hastanto Bowo
Jurnal Wana Tropika Vol 4 No 2 (2014)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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PENGARUH PERBANDINGAN VOLUME METANOL DAN JENIS KATALIS PADA PROSES ESTERIFIKASI-TRANSESTERIFIKASI TERHADAO SIFAT DAN RENDEMEN MINYAK NYAMPLUNG (Calophyllum inophyllum) Woesono, Hastanto Bowo; Hadi, Didik Surya; Pratiwi, Lufitasari Indah
Jurnal Wana Tropika Vol 5 No 2 (2015)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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IDENTIFIKASI POTENSI SUMBER ISOLAT PEMBENTUK GAHARU Kusumaningsih, Karti Rahayu; Woesono, Hastanto Bowo; Hadi, Didik Surya
Jurnal Wana Tropika Vol 9 No 1 (2019)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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Abstract

Right now, agarwood has very good prospect to be developed. To result agarwood resin, needs suitable inoculant that has high survival and can infect plant goodly. The purpose of this research is to identify of potency of several isolates source as agarwood inducer. This study used 3 isolates, namely Musa paradisiaca, Capsium frutescens and Pinus merkusii wood isolates which are made solid, mix and liquid inoculants. The observed parameters were identification of fungi, fungi growth, fungi spore density, and fungi attack infection length after 1 month inoculated. Results of the research showed that fungi at M. paradisiaca and C. frutescens isolates were Fusarium oxysporum, while at P. merkusii wood isolate was Ceratocystis sp. Musa paradisiaca and P. merkusii isolates had faster growth coloni than C. frutescens isolate. The highest fungi spore density resulted at M. paradisiaca isolate in mix inoculant. Three isolates had potency as agarwood inducer with 100% inoculation succcess percentage. Base on growth rapidly, spore density and easily reproduction, M. paradisiaca isolate was tend to chosen to be developed as inducer gaharu. Keywords : Identification, Isolates, Agarwood
MODEL PERTUMBUHAN POHON JATI (Tectona grandis L.f.) DI KPHP BATULANTEH, SUMBAWA, NTB Woesono, Hastanto Bowo; Suhartati, Tatik; Pujasa, Dwita
Jurnal Wana Tropika Vol 9 No 1 (2019)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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Teak is a high value wood. The tree trunk has a high economic value because it provides multipurpose wood products. Tree trunks have distinctive biometric characteristics, including teak trunks. The biometric characteristic of a tree species is a problem in the science of forest planning, because the growth of tree trunks is influenced by many factors, including differences in age, location and site. This research will be arranged biometric model of teak tree that grows in Batulanteh Forest Management Unit, beginning with collecting physical data of tree through measurement of tree dimension. This study uses 75 sample trees grown in the Batulanteh Forest Management Unit area. The data used were tested outlier with boxplot method and calculated ratio and correlation. The regression equation was done by using SPSS version 23 program. Different ratios between tree dimensions at different ages were tested using complete randomized design. The results of this study indicate that the growth model of base diameter, diameter at breast height, and total height are characteristic of trees that are highly correlated with other tree biometrics characteristics. So in the management of teak forests Batulanteh Forest Management Unit can make these three characteristics as a reference in looking at the characteristics of other trees. The results also show the ratio Dp / Dbh, Tt / Dbh still fluctuate throughout the age of 10 to 22 years. Keywords : Teak, growth model, inter-dimensional ratio, age
PERBANDINGAN KARAKTERISTIK MINYAK KAYU PUTIH DARI VARIETAS TANAMAN YANG BERBEDA Woesono, Hastanto Bowo; Nofriansyah, Wahyu
Jurnal Wana Tropika Vol 9 No 2 (2019)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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This study aims to determine the effect of varieties and duration of leaf storage on yield and quality of cajuput oil. The study used a completely randomized design with factorial experiments. The first factor is the variety of eucalyptus plants and the second factor is the duration of leaf storage. The parameters observed in the study included yield, specific gravity, refractive index, optical rotation, cineol content, oil color and solubility in alcohol. The results showed that the variety and duration of leaf storage had a very significant effect only on the yield yield parameters, with a value of 0, 7%, while the quality of cajuput oil such as cineol content, specific gravity, refractive index, does not have a real effect, but for optical rotation has a real effect. The results of the study show the quality standard on the color parameters and cineol content of cajuput oil have not been included in the range of the Indonesian National Standard, but the values of specific gravity, refractive index, optical rotation and solubility in alcohol have met the Indonesian National Standard. Keywords: plant varieties, storage time, oil quality
Co-Authors ., Rawana Agus Prijono Budi Raharjo Damayanty, Dhewy Falah, M. Darul Gaol, Santo Wibowo Lumban Hadi, Didik Surya Herin, Maria C.P Kusumaningsih, Karti Rahayu Nofriansyah, Wahyu Nugroho, Yunianto Hargo Pratiwi, Lufitasari Indah Pujasa, Dwita Purwanto, Muhammad Amir Rawana Saputro, Setiaji Heri Sentot Purboseno Suhartati, Tatik Supriyanto, Gani Sushardi Suwadji, Siman Webliana, Kornelia Wisnu Wardana, Wisnu