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All Journal Agrikultura Bionatura JURNAL HUTAN LESTARI Tengkawang : Jurnal Ilmu Kehutanan Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Jurnal Edukasi dan Penelitian Informatika (JEPIN) agriTECH Jurnal Perlindungan Tanaman Indonesia JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Science and Technology Indonesia Jurnal Bioteknologi & Biosains Indonesia (JBBI) JURNAL GALUNG TROPIKA EnviroScienteae Jurnal Biologi Tropis Indonesian Journal of Chemistry Agrin : Jurnal Penelitian Pertanian Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Martabe : Jurnal Pengabdian Kepada Masyarakat Bioma : Jurnal Biologi dan Pembelajaran Biologi Jurnal Pengabdian Dharma Laksana Jurnal Pengabdian UNDIKMA GUYUB: Journal of Community Engagement Jurnal Pengabdian Masyarakat (ABDIRA)
Hasan Ashari Oramahi
Faculty Of Forestry, University Of Tanjungpura, Jl. Daya Nasional, Pontianak 78124, Indonesa
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities 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 Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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PENGARUH KELEMBAPAN RELATIF DAN SUHU TERHADAP AKTIVITAS GLUKOAMILASE ASPERGILLUS FLAVUS PADA PENYAKIT SIMPANAN GAPLEK H. A. Oramahi, Christanti Sumardiyono, Nursamsi Pusposendjojo, dan Haryadi .
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 9 No. 1 (2009): MARET, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (17.719 KB) | DOI: 10.23960/j.hptt.1967-72

Abstract

The effect of relative humidity and temperatur to glucoamylase activity of Aspergillus flavus on storage disease of dried cassava. Aspergillus flavus is the most important species because of its toxigenic caracteristic on agricultural product. Among several Aspergillus species growing on dried cassava. This study was conducted to show the role of glucoamylase produced by Aspergillus flavus fowards the storage disease of dried cassava. The effect of RH and storage room temperature to glucoamylase activity was evaluated for 4 months using Randomized Completely Block Design (Factorial). Variables observed were glucoamylase activity and starch content of dried cassava. Glucoamylase activity could be used as an early indicator of the infestation of dried cassava by Aspergillus while the change of dried cassava color had not been visible. Starch content of dried cassava decreased during the storage. Due to the glucoamylase activity of A. flavus which degrading starch into glucose. The interaction effect of RH and storage room temperature to glucoamylase activity of A. flavus was significant.
Efikasi Asap Cair dari Kayu Laban (Vitex pubescens) terhadap Rayap Coptotermes curvignathus HA Oramahi; Purwati .; Sofian Zainal; Iskandar .; Idham .; Farah Diba; Wahdina .
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 14 No. 1 (2014): MARET, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.653 KB) | DOI: 10.23960/j.hptt.11471-79

Abstract

ABSTRACTEfficacy of liquid smoke from laban wood (Vitex pubescens) against Coptotermes curvignathus. Antitermitic activities of liquid smoke produced from Vitex pubescens against C. curvignathus was evaluated in this study. This research was conducted in two steps, i.e. pyrolisis of liquid smoke and efficacy test of liquid smoke as antitermite. Three kinds of liquid smoke were produced at three different pyrolysis temperatures, i.e. 350 oC, 400 oC and 450 oC. Termiticidal activity was evaluated by a no-choice test. The research indicates that concentration of liquid smoke and pyrolysis temperatures significantly affected termite mortality and mass losses of the filter paper. The relationship between the concentration of liquid smoke (X) and termite mortality (Y) at 350 oC, 400 oC, and 450 oC were Y = 31,4 + 11,76X, (r2 = 0,60), Y = 30 + 11,86X (r2 = 0,59), and Y = 26,66 + 7,6X (r2 = 0,429). The relationship between concentration of liquid smoke (X) and mass losses (Y) at 350 oC, 400 oC, and 450 oC were Y= 85,12 -3,188X (r2 = 0,723), Y= 88,06 – 3,435X + (r2 = 0,953) and Y= 91,56 – 3,867X (r2 = 0,886).
Optimasi Produksi Asap Cair Dari Kayu Medang (Cinnamomum sp.) Menggunakan Metode Permukaan Respon H. A. Oramahi; Farah Diba; Rizka Diah Permana
EnviroScienteae Vol 16, No 1 (2020): EnviroScienteae Volume 16 Nomor 1, April 2020
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/es.v16i1.8998

Abstract

In this work medang wood (Cinnamomum spp.) was pyrolyzed to produces wood vinegar. The effect of several parameters including the wood particle size, pyrolysis temperature, and pyrolysis time on the pyrolysis efficiency was tested to identify the optimal wood vinegar production conditions. The efficient response surface methodology (RSM) with the Box-Behnken design (BBD) was used for modeling and optimization of the process parameters. RSM used three variable designs namely particle size of wood of 2.38, 3.36, and 4.76 mm, respectively, pyrolysis temperature of 370, 400 and 430°C, respectively, and pyrolysis times 90, 120 and 150 minutes, respectively, with the total of 15 experimental runs. The responses of the BBD fitted with a second-order polynomial equation, illustrating the wood vinegar yield was Y = 15.20 + 0.31 X1 + 5.00 X2 + 0.48 X3 – 1.84 X12 – 1.18 X22 + 0.63 X1.X2 + 0.35 X1.X3 + 0.31 X2.X3 – 0.27 X3.X3.  The optimal conditions found to be at the particle size of wood, pyrolysis temperature, and pyrolysis time were 4.76 mm, 475 °C, 195 minutes, respectively, and yield of wood vinegar was 22.90%.
PERTUMBUHAN PEREPAT (Combretocarpus rotundatus Miq) PADA MACAM MEDIA DENGAN PENAMBAHAN PUPUK NPK DI PERSEMAIAN Kasli Kasli; H. A. Oramahi; Gusti Hardiansyah
EnviroScienteae Vol 17, No 2 (2021): ENVIROSCIENTEAE VOLUME 17 NOMOR 2, AGUSTUS 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/es.v17i2.11499

Abstract

It is highly hoped that the recovery of damaged and degraded peat swamp forest will be implemented immediately, given the function of peat swamp forest which is very vital for the sustainability of the ecosystem. The development of tree species original in the perepat type of peat swamp forest (Combretocarpus rotundatus Miq) is needed. Provision of good and quality fasting type seeds can be done by seeding in the nursery. This study aims to find the best type of planting medium in increasing accelerator growth in the nursery and obtaining the right dosage of NPK fertilizer to increase the growth of the nursery accelerator. The media used were peat soil and ultisol soil with the following treatment design : (M1 = peat soil, M2 = ultisol soil, and M3 = mixture of peat soil and ultisol soil with a ratio of 1: 1), then the addition of the NPK fertilizer dosage used is (P0 = 0 g, P1 = 75 mg, P2 = 150 mg , P3 = 225 mg, and P4 = 300 mg.). using the factorial experiment method with a completely randomized design. The results showed that the most suitable medium for the growth of seedlings was using peat media. The application of NPK fertilizer can increase the growth of fasting perepat in the nursery until the age of 3 months by giving a significant effect on growth in height, diameter and number of leaves. The dose of NPK fertilizer is 225 mg. resulting in the best and economic growth enhancement.
The Potency of Kirinyuh (Chromolaena odorata L.) and Kemangi leaf (Ocimum basilicum) as Biopesticide against Schizophyllum commune Fries Farah Diba; Ulvatur Rochmawati Nauli; Wiwik Winarsih; H A Oramahi
Jurnal Biologi Tropis Vol. 22 No. 1 (2022): January - March
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v22i1.3023

Abstract

Schizophyllum commune Fries is a wood rot fungus that attacks living trees and wood products which causes high economic losses. The research objective was to evaluate the extracts of kirinyuh (Chromolaena odorata L) and kemangi (Ocimum basilicum L) as a biopesticide to control Schizophyllum commune Fries. The solvents used for extracting the leaves of Kirinyuh and kemangi were 96% ethanol solvent in a ratio of 1: 3 (w/v). The extracts then formed into 2%, 4%, 6%, 8%, and 10% concentration and mixed into PDA medium. The media was poured into a petri dish and then kept in incubator room. Then the isolates of Schizophyllum commune Fries fungus, seven days old with a five mm diameter, were put in the medium center. The parameter test was the value inhibition the fungal growth, comparing control treatment and the given concentration treatment. The results of research showed that kirinyuh leaf extract at a concentration of 2% has strong antifungal values with growth inhibition of 74.25%, at concentration 4%, 6%, 8%, and 10% had a strong antifungal value with growth inhibition of 82.97%; 88.90%; 89.49% and 91.67%. Extracts of kemangi leaf had strong antifungal values (at concentration 2% and 4%) with growth inhibition of 66.63% and 71.72%, while at concentration 6%, 8%, and 10% had a strong antifungal value with inhibition of fungal growth by 81.05%; 83.02%; and 100%. The bioactive compounds found in kemangi leaf extracts were saponins, flavonoids, and linalool which are toxic and kill fungi. Kirinyuh leaf extract has an active alkaloid compound that is toxic and inhibits the formation of fungal cell walls. The optimal concentration of kemangi extract to inhibit the growth of Schizophyllum commune was 6% and from kirinyuh extract was 4%. 
Optimization and Characterization of Wood Vinegar Produced by Shorea laevis Ridl Wood Pyrolysis Hasan Ashari Oramahi; Tsuyoshi Yoshimura; Elvi Rusmiyanto; Kustiati Kustiati
Indonesian Journal of Chemistry Vol 20, No 4 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (304.921 KB) | DOI: 10.22146/ijc.45783

Abstract

In this study, the Box-Behnken Design (BBD) was employed to investigate the effects of wood particle size, pyrolysis temperature, and pyrolysis time on the production of wood vinegar from Indonesia “bengkirai” wood (Shorea laevis Ridl). Characterization of wood vinegar was conducted by gas chromatography-mass spectrometry (GC-MS). Three variable designs consisting of wood particle size (2.00, 2.38, and 3.36 mm), pyrolysis temperature (350, 400, and 450 °C), and pyrolysis time (105, 120, and 135 min) were employed in a BBD response surface methodology (RSM-BBD). RSM-BBD results suggested that maximum wood vinegar yield would be obtained with a wood particle size of 3.85 mm, pyrolysis temperature of 400 °C, and pyrolysis time of 93 min. In addition, the mathematical model indicated the maximum wood vinegar yield would be 30.31%. The main compounds in wood vinegar were acetic acid, 1-hydroxy-2-propanone, furfural, 2,3-pentanedione, phenol, 2-methoxy phenol, 2-methoxy-4-methyl phenol, 2,6-dimethoxy phenol, and 1,2,4-trimethoxybenzene.
POTENSI ASAP CAIR DARI KAYU BINTANGUR SEBAGAI BIOPESTISIDA PENGENDALI JAMUR Schizophyllum commune Juanita Juanita; Hasan Ashari Oramahi; Farah Diba
BIOMA Vol 5, No 1 (2020): BIOMA : JURNAL BIOLOGI DAN PEMBELAJARAN BIOLOGI
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/bioma.v5i1.3684

Abstract

Penelitian ini bertujuan untuk mengevaluasi sifat antijamur asap cair kayu bintangur dalam menghambat pertumbuhan jamur S. commune secara in vitro.  Asap cair kayu bintangur yang digunakan sebanyak tiga jenis hasil dari pirolisis pada suhu 370, 400 dan 430oC. Medium PDA digunakan untuk efikasi asap cair kayu bintagur terhadap pertumbuhan jamur S. commune. Efikasi asap cair kayu bintangur terhadap jamur S. commune dengan rancangan acak lengkap faktorial, terdiri atas suhu pembuatan asap cair kayu bintangur (370, 400, dan 430oC) dan konsentrasi asap cair kayu bintangur (0, 0,5, 1,0, 1,5 dan 2,0%, v/v). Hasil penelitian menunjukkan bahwa suhu pirolisis produksi asap cair dan konsentrasi asap cair berpengaruh sangat nyata terhadap daya hambat pertumbuhan jamur, S. commune. Kemampuannya sebesar 100% pada konsentrasi 2% masing-masing pada suhu pirolisis asap cair 370, 400, dan 430°C. 
Penggunaan Asap Cair dari Tandan Kosong Kelapa Sawit untuk Pengendalian Jamur Phytophthora citrophthora secara In Vitro Hasan Oramahi; Elvi Rusmiyanto; Kustiati Kustiati
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 38, No 1 (2021)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2021.38.1.1265

Abstract

Efficacy of wood vinegar produced from empty fruit bunches (EFB) against Phytophthora citrophthora fungus was evaluated. The objective of the present work is to to evaluate antifungal properties of wood vinegar from EFB against P. citrophthora fungus. Three kinds of wood vinegar were used three temperatures i.e. 350, 400 and 450 °C. Efficacy of wood vinegar from EFB for antifungal is a factorial 3 by 4 in a completely randomized design; the first factor was pyrolysis temperature of wood vinegar from EFB (350, 400, and 450 °C) and the second factor was treatment of concentration of wood vinegar from EFB  (0, 0.5, 1.0, and 1.5 %, v/v). The results showed that pyrolysis temperature effect of wood vinegar from EFB and concentration of wood vinegar were significantly different for inhibition of fungal growth. The highest inhibition was on wood vinegar for EFB with temperature pyrolysis of 450 °C and concentration of wood vinegar of 1% with average value of 100%.
Optimization of Liquid Smoke from Shorea pachyphylla using Response Surface Methodology and its Characterization Hasan Ashari Oramahi; Kustiati; Elvi Rusmiyanto Pancaning Wardoyo
Science and Technology Indonesia Vol. 7 No. 2 (2022): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1107.385 KB) | DOI: 10.26554/sti.2022.7.2.257-262

Abstract

The present study aims to optimize the processing variables producing liquid smoke from mabang wood (Shorea pachyphylla) by using Response Surface Methodology (RSM). In this investigation, a design of experiment with different combinations of pyrolysis temperature and pyrolysis time on the liquid smoke yield from mabang wood was applied. The response of the optimal yield, temperature, and time of pyrolysis was predicted using a mathematical model. The optimal operating conditions for the process of yielding 31.31% liquid smoke were identified at the pyrolysis temperature of 440◦C and pyrolysis time of 124 minutes. The effect of pyrolysis temperature was more significant than the pyrolysis time (p<0.05). The liquid smoke samples were evaluated by a GC-MS. The main chemical compound of the liquid smoke were 1,2-ethanediol (19.26%), fluoromethane (6.69%), formic acid (4.96%), 2-propanone (4.17%), acetic acid (18.64%), acetol (4.80%), furfural (9.94%), 2,4-hexadecanoic acid (3.45%), and guaiacol (2.93%).
Utilization of Plants as Food Source: A Study in Sungai Bakah Village, Melawi Regency Niconaus Niconaus; Hasan Ashari Oramahi; Fathul Yusro; Yeni Mariani
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): July - September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i3.4926

Abstract

Nature has a high potential for biological natural resources that humans, including plants as food, can utilize. This study aims to analyze the types of plants as a source of food used by the people of Sungai Bakah Village, Pinoh Selatan District, Melawi Regency. This study used a survey method. Respondents selected using a purposive sampling technique were interviewed to obtain data on the utilization of plants used as food ingredients. The data obtained is then analyzed using use value and fidelity level. The results showed that all respondents interviewed (131 respondents) used plants as a food source. A total of 84 types of plants were used, with fruit as the part that was most used (49.44%). Vegetables and fruits are the most widely used forms of utilization. Plants with the highest UV values ​​came from starch (Gymnopetalum cocinense), rice (Oryza sativa), chilies (Capsicum frutescens L.), and bamboo shoots (Dendrocalamus asper) with a value of 1. 84 plants species had the highest FL values ​​(100), most of which comes from the category of utilization as fruits.  
Co-Authors . SUPARTO Abi, . Abidin, Syamsul Alkhadi Apriliansyah, Apriliansyah Arrafi Nursyahdi Ayong Hiendro Ayu, Masjuni Cerita Bernita Purba, Cerita Bernita Christanti Sumardiyono Christanti Sumardiyono Darwanti, Herlina Deli, Deli Dina Setyawati Dirhamsyah, Muhammad Efitanus Angga Windra Elvi Rusmiyanto Pancaning Wardoyo, Suci Lestari, Mukarlina, Eva Faja Ripanti Evy Wardenaar Farah Diba Farah Diba Farah Diba - Fathul Yusro Gusti Eva Tavita Gusti Hardiansyah Habibi Habibi Hafiz Ardian Haryadi - Haryadi Haryadi Haryadi Haryadi Hendra Prawira Herlina Darwati Idham . Irawan, Ria Iskandar . Iswan Dewantara Joni, Alfius Juanita Juanita Juanita Juanita Julia, Lusiana Julio, Yulius Rio Junisa, Junisa Kasli Kasli Kharismanto, Dedang Kris tianti Kustiati Kustiati Kuswadi Liza, Liza Lodovika, Patrisia Lolyta Sisilia Lolyta Sisillia M Idham, M M. Irfani Hendri M. M. Dirhamsyah Maria s, Agustina Marsiana, Marsiana Marwanto Marwanto, Marwanto Maurisa, Tirsa N Nurhaida Nensi, Wilhelmina Niconaus Niconaus Novita, Maria Nurhaida Nurhaida Nurhaida, . Nursamsi Pusposendjojo Nursamsi Pusposendjojo Nursamsi Pusposendjojo, Nursamsi Paulus Paulus Prio Utomo, Kiki Purnama Darmadji Purwati . Rahmawati Rahmawati Rahmawati Ratna Herawatiningsih Reine Suci Wulandari Rendiawati, Rendiawati Rendra Antra Pardosi Ria Armunanto Riadi, Richi Rizka Diah Permana Rizka Diah Permana Ruqiah Ganda Putri Panjaitan sairi, agus Santoso, Ida Riyanti Sauji, muhamad Seki, Weliam Siallagan, Tamauli Simangunsong, Muhammad Iqbal Singgih Priyamto Slamet Rifanjani Sofian Zainal Sofyan Zainal Sudirman Muin Tsuyoshi Yoshimura Ulvatur Rochmawati Nauli Utari, Veny Utomo, Kiki Prio wah dina Wahdina - Wahdina . Wahdina, Wahdina Widya Anggraeni Widya Anggraeni Wiwik Ekyastuti Wiwik Winarsih Wuri Prihatiningtiyas Yanieta Arbiastutie, Yanieta Yanti Hikma Yeni Mariani Yolandra, Utin Kenny Yordanus Dediwanto Yusuf, Rizky Oktaviani Zefanya Alviolita Zulpitasari, Melinda