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All Journal Jurnal Matematika & Sains Jurnal Tataloka Journal of Tropical Biodiversity and Biotechnology JURNAL SELULOSA Jurnal Ilmu dan Teknologi Kayu Tropis Jurnal Penelitian Hasil Hutan
Yoyo Suhaya Yoyo Suhaya
Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Education Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics

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Distribusi Biomassa di Atas dan Bawah Permukaan dari Surian (Toona Sinensis Roem.) Yusuf, Muhammad; Sulistyawati, Endah; Suhaya, Yoyo
Jurnal Matematika dan Sains Vol 19 No 2 (2014)
Publisher : Institut Teknologi Bandung

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

Abstract

Surian (Toona sinensis) merupakan spesies pohon dengan banyak kegunaan yang umum digunakan pada program aforestasi/reforestasi di Indonesia. Untuk dapat lebih memahami peranan surian dalam menyerap karbon, penghitungan biomassa surian menjadi tahap pertama yang penting untuk dilakukan. Penelitian ini bertujuan untuk mengetahui distribusi dan proporsi biomassa tiap bagian pohon surian melalui metode pengrusakan (destructive sampling). Sebanyak 18 pohon surian dalam rentang diameter batang setinggi dada 2 - 31 cm digunakan dalam penelitian ini. Dimensi tiap pohon diukur di lapang dan juga laboratorium, seperti diameter setinggi dada (DBH), tinggi (H), dan kerapatan kayu. Biomassa pohon dibagi menjadi lima komponen, yaitu batang, cabang, tangkai, daun, dan akar. Hasil penelitian menunjukkan bahwa biomassa batang adalah bagian paling dominan sedangkan tangkai daun dan daun hanya menyumbang sebagian kecil dari biomassa pohon. Biomassa di atas permukaan tanah (above-ground biomass/AGB) memiliki kontribusi paling besar dari biomassa total dengan rasio root to shoot (R/S) sebesar 0,24. Kandungan karbon tiap bagian pohon hampir sama dengan rata-rata sebesar 42% dari biomassanya. Seiring dengan perkembangan pohon surian, kerapatan kayu teramati cenderung konstan pada kisaran 0,32 - 0,5 g.cm-3 dengan rata - rata sebesar 0,43 ± 0,049 g.cm-3. Kata kunci: Biomassa, Distribusi, Simpanan karbon, Surian. Distribution of Above- and Below- Ground Biomass of Surian (Toona Sinensis Roem.) Abstract Surian (Toona sinensis) is a multi-purpose tree species commonly used in Indonesia for afforestation/reforestation program. In order to better understand the role of surian tree in sequestrating carbon, it is important to measure the biomass of surian. This study aimed to know the biomass distribution in each compartments of surian through a destructive sampling. Eighten trees with the diameter ranging from 2 cm to 30 cm were used in this study. The key dimensions of each tree were measured in the field and laboratory, i.e. diameter at breast height (DBH), height, and wood density. Biomass was divided into five compartments, i.e. stem, branches, petioles, leaves, and roots. The results showed that stem were the dominant part of the total biomass, while petioles and leaves only contributed a small fraction. Above-ground biomass (AGB) yields the highest contribution to total biomass with the root to shoot ratio of 0.24. Carbon content of each tree compartment was relatively equal with another, in average 42%. Wood density was observed relatively constant along tree development in range 0.32 - 0.5 g.cm-3 with average of 0.43 ± 0.049 g.cm-3. Keywords : Biomass, Distribution, Carbon stock, Surian.  
Some Importance Properties of Bamboo-Wood Strand Board Ihak Sumardi; Yoyo Suhaya; Tito T. Putra
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 1 (2010): 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.v8i1.512

Abstract

Bamboo has gained increasing attention as an alternative raw material for use in the manufacture of composite boards. Three layered boards were made from bamboo strand and wood particle to evaluate the effects of resin content and layer structure on the properties of bamboo-wood strand board. Bamboo strand was used as face/back layers, and wood particle was used as core layer. The boards were fabricated using urea formaldehyde resin with three dosage levels ranging from 3 to 9 percent for bamboo strand and 6 percent resin content for wood particle. The mechanical properties and dimensional stability of bamboo-wood strand board were evaluated, and the results were summarized as follows. The bending properties, internal bond (IB) strength and dimensional stability of the board increased with increasing of resin content. Using bamboo strand as face/back layered, slightly increase bending properties of bamboo-wood strand board. However, the modulus constant and IB strengths after boiling test could not be observed. It indicates that urea formaldehyde was not suitable for bamboo-wood strand board.
Wood Drying Method by “Teresan” Process on Sengon Wood (Paraserianthes falcataria L. Nielsen) Yoyo Suhaya; Bambang Subiyanto; Yoshinori Kobayashi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 2 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (251.409 KB) | DOI: 10.51850/jitkt.v3i2.294

Abstract

This research aims to confirm the effect of conventional teresan process as a natural drying on Sengon (Paraserianthes falcataria L. Nielson) standing trees, and to develop a new teresan process by adding Arboricide.The experiment was done in dry season at Kuningan, West Java.  For the conventional teresan process, living trees were nicked into the cambial layer around the trunk at 15 ~ 25 cm in height from the ground. For the new teresan process, 25% percent kerosene solution of Arboricide Garlon 480EC was coated at the nick of the tree.Living Sengon trees in dry season showed high moisture content, i.e. around 60 ~ 100%.  By the conventional teresan process, the reduction of moisture was almost the same as control trees.  On the other hand, by the new teresan process coating with 25% kerosene solution of Arboricide Garlon 480EC it showed a large reduction of moisture content from over 100% to 30% in 4 months.  The new teresan process showed the drying speed of 0.66% per day; higher than that of the conventional process, i.e. 0.24% per day.  The new teresan process could be suggested as a high-speed natural drying method in the forest.
Karakterisasi Asap Cair Distilasi dan Terdistilasi Vakum dari Limbah Serasah Pinus Wafa Karimatul Azmi; Ihak Sumardi; Yoyo Suhaya
JURNAL SELULOSA Vol 11, No 02 (2021): JURNAL SELULOSA
Publisher : Center for Pulp and Paper

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25269/jsel.v11i02.334

Abstract

Characterization of Distilled and Vacuum Distilled Liquid Smoke from Pine Litter WasteAbstractThe solid waste of pine litter in the form of leaves, strobilus, and pine sawdust in the gondorukem and turpentine factories is still minimally utilized and causes environmental problems. However, the presence of cellulose, hemicellulose, and lignin content makes pine litter potential to be used as liquid smoke through the pyrolysis process. Liquid smoke has many benefits, including as an antiseptic and food preservative, but the characteristics of liquid smoke from pine litter are not yet known, so it requires further study. This research aims to determine the characteristics of smoke from pine litter waste, especially the composition of its chemical components, so the possibility for wider utilization can be known. The manufacture of liquid smoke is carried out through pyrolysis on pine litter waste, then given vacuum distillation treatment as a purification attempt. Tests on both samples using yield parameters, pH, total acid value, color organoleptic properties, specific gravity, and analysis of chemical components using gas chromatography-mass spectrometry. The results showed that the yield of liquid smoke and charcoal from waste pine litter is low, but the yield of vacuum distilled liquid smoke is huge. The distilled liquid smoke had a darker color, lower pH, higher total acid, and higher specific gravity than vacuum distilled liquid smoke. In general, the chemical components identified in both groups are divided into carbonyl, aryl alkyl ether, alkane, organic acids, and phenolic compounds. The content of phenolic compounds and furfural as the dominant compounds opens opportunities for use as wood preservatives, food preservatives, topical analgesics, antiseptics, fungicides, and nematocides.Keywords: liquid smoke, pine litter waste, vacuum distillation, chemical compound, characterizationAbstrakLimbah padat serasah pinus berupa daun, strobilus, dan serbuk kayu pinus di pabrik gondorukem dan terpentin masih minim pemanfaatannya dan menimbulkan masalah lingkungan. Serasah pinus memiliki kandungan selulosa, hemiselulosa, dan lignin yang berpotensi untuk dimanfaatkan sebagai asap cair melalui proses pirolisis. Asap cair memiliki banyak manfaat, di antaranya sebagai bahan antiseptik dan pengawet makanan. Namun asap cair dari limbah serasah pinus masih belum diketahui karakteristiknya, sehingga membutuhkan pengkajian lebih lanjut. Penelitian ini dilakukan untuk mengetahui karakteristik asap cair dari limbah serasah pinus berdasarkan sifat fisik dan susunan komponen kimianya, sehingga dapat diketahui peluang pemanfaatannya secara lebih luas. Pembuatan asap cair dilakukan melalui proses pirolisis pada limbah serasah pinus, lalu diberikan variasi perlakuan distilasi vakum sebagai upaya purifikasi. Pengujian pada asap cair distilasi dan asap cair terdistilasi vakum menggunakan parameter rendemen, pH, nilai total asam, sifat organoleptik warna, bobot jenis, dan analisis komponen kimia menggunakan gas chromatography-mass spectrometry. Hasil penelitian menunjukkan bahwa asap cair dari limbah serasah pinus distilasi memiliki warna yang lebih gelap, pH yang lebih rendah, total asam yang lebih banyak, dan bobot jenis yang lebih tinggi daripada asap cair terdistilasi vakum. Secara umum, komponen kimia yang teridentifikasi pada keduanya terbagi dalam kelompok karbonil, alkana, aril alkil eter, senyawa asam, dan senyawa fenolik. Asap cair distilasi mengandung beberapa senyawa dari kelompok terpena dan terpenoid, sedangkan asap cair distilasi vakum mengandung senyawa dari kelompok alkaloid. Kandungan senyawa fenolik dan furfural sebagai senyawa dominan membuka peluang pemanfaatan sebagai pengawet kayu, pengawet makanan, analgesik topikal, antiseptik, fungisida, dan nematosida.Kata Kunci: asap cair, limbah serasah pinus, distilasi vakum, komponen kimia, karakterisasi
Praxelis (Asteraceae: Eupatorieae), A Newly Naturalised Genus for Kalimantan and Sumatra, Indonesia Hariri, Muhammad Rifqi; Irsyam, Arifin Surya Dwipa; Lestari, Ria Windi; Peniwidiyanti, Peniwidiyanti; Rahmaningtiyas, Lutfi; Zulkarnaen, Rizmoon Nurul; Widjaya, Aulia Hasan; Saripudin, Saripudin; Latifah, Dian; Yuliyanto, Ponco; Budianti, Noviana; Suhaya, Yoyo; Rosleine, Dian; Sulistyawati, Endah
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 4 (2024): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.90595

Abstract

The southern American genus Praxelis Cass. has 18 species. In Singapore and Indonesia, notably Java, P. clematidea R.M.King & H.Rob. has naturalised. The first record in Indonesia was in Bogor in 2018, although it is unverified elsewhere. Praxelis clematidea was found in Bangka, Belitung, Jambi, Lampung, and Palangka Raya during our exploratory field research in 2020–2023. The naturalised populations proliferate in roadsides, ditches, open spaces, and disturbed areas.  It thrives in a small swampy peat environment in Palangka Raya. Praxelis clematidea has been found outside Java, suggesting it could become an invasive alien species in Kalimantan and Sumatra.
Efikasi Asap Cair Dari Limbah Pengolahan Industri Gondorukem Pada Kayu Karet Terhadap Rayap Kayu Kering (Cryptotermes cynocephalus Light.) Ghani Fakkar; Ihak Sumardi; Suhaya, Yoyo
Jurnal Penelitian Hasil Hutan Vol. 41 No. 1 (2023): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jphh.2023.675

Abstract

Wood vinegar is made from condensation of biomass pyrolysis, contained phenolic compound, carbonyl, and acid that used for insecticide, wood and food preservative, and aroma enhancer. Pine waste as biomass obtained from gum rosin and turpentine processing had a great potential to be processed into wood vinegar. This paper studies the effect of coating rubber wood using wood vinegar made from pine waste against dry-wood termite. The rubber wood (2.5x2.5x5 cm3) was coated with distillated and without distilled (crude) wood vinegar in 100, 50, and 25% dilution. Samples were conditioned within in hours before PVC pipes (2.6 cm diameter and 5 cm height) were installed into wood surface using wax. There were 50 drywood termite fed into the pipes. The samples kept in dark room for 12 weeks. This experiment was conducted according to SNI 01-7207-2014. The result showed that coating method using un-distilled or crude wood vinegar made from pine waste could increase the durability of rubber wood against dry-wood termite. This happened due to the toxic compound in the crude wood vinegar that made coating methods using un-distilled wood vinegar can be used to increase the durability of rubber wood against dry-wood termite.
Proyeksi Debit dan Limpasan Akibat Perubahan Tutupan Lahan dan Iklim di Sungai Citarum Kecamatan Dayeuhkolot pada Tahun 2045 Suheri, Asep; Suhaya, Yoyo; Kunigara, Andika Putra
TATALOKA Vol 27, No 2 (2025): Volume 27 No. 2 May 2025
Publisher : Universitas Diponegoro Publishing Group, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/tataloka.27.2.161-191

Abstract

Perubahan iklim dan tutupan lahan mengakibatkan peningkatan aliran permukaan (surface runoff) dan debit Sungai yang berpotensi dalam peningkatan frekuensi dan intensitas banjir. Salah satu daerah yang mengalami masalah ini adalah Kecamatan Dayeuhkolot yang terletak di DAS Citarum Hulu. Oleh karena itu, penelitian ini, dengan tujuan memprediksi perubahan debit dan limpasan Sungai Citarum di Kecamatan Dayeuhkolot pada tahun 2045 dengan mempertimbangkan skenario perubahan tutupan lahan dan iklim disusun agar dapat menjadi masukan dalam strategi rehabilitasi lahan di DAS Citarum Hulu. Dalam penelitian ini, dilakukan simulasi perubahan penggunaan lahan dari tahun 2022 hingga 2045 menggunakan model CA-Markov dengan skenario Business as Usual (BAU). Selain itu, dilakukan Statistical Downscalling Model (SDSM) untuk menganalisis tren perubahan iklim pada tiga skenario berbeda. Setelah itu, kombinasi dari masing-masing skenario perubahan penggunaan lahan dan iklim, akan dimodelkan dalam model hidrologi Soil and Water Assessment Tool (SWAT) untuk mensimulasikan aliran air masa depan dan menganalisis risiko banjir masa depan. Hasil penelitian menunjukkan peningkatan limpasan tahunan tertinggi terjadi pada skenario perubahan iklim RCP 8.5 dan skenario perubahan tutupan lahan Business As Usual, yaitu sebesar 24,42%. Selain itu, peningkatan debit tertinggi terjadi pada skenario perubahan tutupan lahan dengan skenario Business As Usual dan skenario iklim RCP 8.5, yaitu sebesar 91,84%.
Co-Authors Bambang Subiyanto Budianti, Noviana DIAN LATIFAH, DIAN Dian Rosleine, Dian Ghani Fakkar Ihak Sumardi Ihak Sumardi Ihak Sumardi Irsyam, Arifin Surya Dwipa Kunigara, Andika Putra Muhammad Rifqi Hariri Muhammad Yusuf Peniwidiyanti, Peniwidiyanti Rahmaningtiyas, Lutfi Ria Windi Lestari Saripudin Saripudin Suheri, Asep Sulistyawati, Endah Sulistyawati, Endah Tito T. Putra Wafa Karimatul Azmi Widjaya, Aulia Hasan Yoshinori Kobayashi Yuliyanto, Ponco Zulkarnaen, Rizmoon Nurul