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Peronema Forestry Science Journal
Published by Universitas Sumatera Utara
ISSN : -     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Arjuna Subject : -
Articles 304 Documents
 7   8   9   10   11 
Inventory and Utilization Aren (A. pinnata) by Forest Communities Widely (Study Case: Sihombu Village, Tarabintang District, Humbang Hasundutan Regency) Rionaldo Damanik; Irawati Azhar; Riswan Riswan
Peronema Forestry Science Journal Vol 3, No 1 (2014): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Aren (A. pinnata) are included in the arecaceae (areca nut) and are included in the inclosed seed plants (angiospermae). Aren is a forest plant that has many benefits but is not yet used by forest communities widely. The purpose of this study has to elevate the potential, distribution and utilization of aren. This research was using compartment sampling with compartment strip technique. The result showed that optimal growth of aren in elevate 550-560 mdpl and the utilization of aren such as, sugar palm juice, palm wine, palm fiber, leaf adnd steam. The sugar processing plants by the human in this area is steal simple and production potential processing has not been abel to be treated optimally.Keywords: Aren, potential, utilization, production.
Variation of Particle Pretreatment on Termites Attack of Particleboard Made from Waste Oil Palm Trunks using Urea Formaldehida Resin Kaya Muda Lubis; Rudi Hartono; Tito Sucipto; Apri Heri Iswanto
Peronema Forestry Science Journal Vol 3, No 1 (2014): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The waste of oil palm trunk could be used as alternative raw material for particleboard. The purpose of these studies were to evaluate durability of particleboard on termites attack. Particle pretreatment were done by hot water soaking (1 hour, 2 hours, 3 hours) and cold water soaking (24 hours, 48 hours, 72 hours). Particle board were made from waste of oil pulm trunk using urea formaldehida of 10% with size 30 cm x 30 cm x 1 cm, density target 0.75 g/cm3, pressure 25 kg/cm2 at 130ºC of temperature for 10 minutes. Particleboard was tested for durability of particleboard on termites attack by grave yard test along 100 days and wil be compared by SNI 01-7207-2006.The percentages of particleboard weight loss were 41.05-60.29%. Based on the termites attack rate, all of particleboards were classified as very bad durability. The best of particleboards durability was the board with cold water soaking for 72 hours treatment with 41.05% of particleboard weight loss.Keywords : oil palm trunk, urea formaldehida, particle pretreatment, particle board, subterranean termites.
Increasing Oleoresin (Pinus merkusii) Productivity with Physical Treatment Modification and Time of Tapping in Riil Method Wilna Fikriyah Hasibuan; Ridwanti batubara; Muhdi Muhdi
Peronema Forestry Science Journal Vol 3, No 1 (2014): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Pinus merkusii is one of endemic in North Sumatera, especially in the north. Pine has a very impotant role, whereas beside as a pioneer plant, pine also produces resin which if we process it more, it will has higher economic value. The purpose of this research were to knowing the influence between time of tapping with physical treatment modification in riil method of oleoresin productivity. In this research, the physical treatment used were by hitting (without hitting, 10,20, and 30 times hitting). The result of this research showed that 10 times hitting were different than 20 and 30 times hitting, while 20 and 30 times hitting were not different. The highest amount of oleoresin productivity were from 10 times hitting (1,428 kg/tree/year) which showed that physical treatment of 10 times hitting were better than 20 and 30 times hitting. The times of tapping 3 days at once was very different with the times of tapping 5 and 7 days at once, while the times of tapping 5 and 7 days at once were not different. The times of tapping 3 days at once has a significant influence and it was the best times of tapping for increasing oleoresin productivity.Key words : Pinus merkusii , resin, riil method, times of tapping
(The Application of H2SO4 As Stimulant To Increase The Productivity of Oleoresin (Pinus merkusii Jungh et de Vriese) With Riil Method Ayu Rahayu Effendi Surbakti; Ridwanti Batubara; Muhdi Muhdi
Peronema Forestry Science Journal Vol 3, No 1 (2014): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The Production of oleoresin is affected by the application of stimulant and time of tapping. The purpose of this research were to know the effect of H2SO4 stimulant and the time of tapping to P. merkusii and to know the H2SO4 concentration and the best time of pine tapping that gave the best of tapping. This research were carried at working area of PT. Inhutani IV, Siborong-borong in Mei – June 2013 using factorial randomized block design with two factors, i.e. the concentration of stimulant (0%, 10%, 20% and 30%) and time of tapping (3, 5 and 7 days at once). Parameter measured were production of oleoresin (gram). Result of this research showed that the application of H2SO4 stimulant on the tapping of pine trees increase considerably to oleoresin. The application of H2SO4 resulted in more than 2 – 4 times the yield of oleoresin from tree without stimulant. The concentration of H2SO4 (30%) and the time of tapping in 3 days can gave the best product of oleoresin.Key word : P. merkusii, resin, stimulant, tapping.
Weather Effect On Discoloration of Fiber Plastic Composite Made of Corrugated Paper and Polyethylene with The Addition Of Maleic Anhydride and Benzoyl Peroxide Vicky Fadliansah Sihombing; Luthfi Hakim; Ridwanti Batubara
Peronema Forestry Science Journal Vol 3, No 1 (2014): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The use of fiberplastic composite (FPC) for exterior purposes raises issues related to durability FPC against weather influences. Discoloration is one problem that often occurs in the products that are used for the purpose of exterior use. Discoloration of the product exposed to weather effects will reduce the aesthetic appearance of a product.The main objective of this research was to evaluate discoloration of FPC after exposed to weather for 6 months.In this study, there were 6 treatments consisting of two factors, namely the ratio of FPC materials (corrugated paper fibers and polyethylene) which consists of 3 levels ie 50:50, 60:40 and 70:30 and the additional factor of maleic anhydride (MAH), which consists of two levels, namely 5% and 7%.The results showed that after exposure to the weather for 6 months, the discoloration on the FPC are initially black to white dull. At the70:30 ratio with the addition of 7% MAH the discoloration are not too drastic than in the comparison of 50:50 and 60:40. Discoloration on the surface of the FPC caused by photodegradation by UV light. Degradation mainly occurred in the lignin component and cause discoloration. The addition of MAH cannot reduce discoloration of the FPC after exposure for 6 months.Keywords : fiber plastic composite, discoloration, weathering test.
The Inhibition Test of Extract Paku Pohon (Cyathea contaminans (Hook.) Copel.) To Fungi Microsporum gypseum In Vitro Citra Dewi Turnip; Ridwanti Batubara; Herawaty Ginting
Peronema Forestry Science Journal Vol 3, No 1 (2014): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

This study aims to determine the effect of inhibition extract paku pohon (Cyathea contaminans (Hook.) Copel.) to fungi Microsporum gypseum, the fungus causes skin disease, horn or keratin-eating substances, as well as damage the nails and hair. The method of the study was in vitro test by paper disc method. The extracts were diluted into concentrations of 500 mg / ml, 400 mg / ml; 300mg/ml; 200mg/ml; 100mg/ml, until 10 mg / ml for M. gypseum tests respectively. Each petri dish added 0.1 ml of inoculum was added 15 ml of Potato Dextrose Agar media that has been thawed sterile and wait until the temperature reaches 4500C, respectively disc subsequent paper that has been soaked in various concentrations of extract for 15 minutes, put on the media , incubated at a temperature of 20-250 ° C for 48 hours. Inhibitory regions surrounding diameter of disc was measured using calipers paper. Tests carried out 3 times. Performed using DMSO4 blank. The results showed a significant effect on paku pohon extract the inhibition of fungal M. gypseum which starts at a concentration of 400 mg / ml and the smallest inhibition at concentrations of 300 mg extract / ml. The smallest concentration is the value of Minimum Inhibitory Concentration (MIC).Keywords: Cyathea contaminans (Hook.) Copel., extract Paku pohon, M. gypseum.
The Durability of Fiber–Plastic Composite with Maleic Anhydride (MAH) as Compabilitizer and Benzoyl Peroxide (BPO) as Initiator toward Termits Attack Pandapotan Christian Purba; Luthfi Hakim; Ridwanti Batubara
Peronema Forestry Science Journal Vol 3, No 1 (2014): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The use of plastic fiber composite (FPC) for exterior purposes as one alternative to solid wood has a variety of power requirement one of which is resistant to termites. This study aimed to test the durability of fiber composite plastic derived from recycled corrugated old paper fibers and polypropylene (PP) with the addition of maleic andhirida (MAH) as compabilitizer and benzoyl peroxide (BPO) to termite attack. This research used Completely Randomized Design (CRD) factorial, there are two factors: comparison of corrugated old paper fibers and polypropylene (PP), which consists of 50:50, 60:40 and 70:30 and additive factors maleit anhirida (MAH) 1% and 2% and the results were compared with JIS A 5905-2003 S20 hardboard and JIS A 5908-2003 particleboards type 13 for physical properties and SNI 01 7202-2006 to test the grave yard test termites. The results showed after trials testing the grave for 100 days, the physical properties of the fiber composite plastic does not entirely meet the testing standards JIS A 5905-2003 S20 hardboard and JIS A 5908-2003 particleboards type 13. To test resistance to termite attack, some fiber plastic composite that meets the ISO standard FPC 50:50 01 7202-2006 1% MAH, 1% MAH 60:40, 60:40 and 70:30 2% MAH while the remaining 2% are outside the standard. The Patterns of termite attack on FPC 50:50 70:30 2% and 1% MAH MAH resembles a circular pattern.Keywords : corrugated old paper fiber, polypropilene, fiber plastic composite, durability against termite attack.
The Giving Variation of Concentration Kecombrang Flowers Extract (Etlingera elatior Jack R. M. Sm) as Natural Insectiside Against Aedes spp Lia Andriani Tarigan; Ridwanti Batubara; Sumardi Sumardi
Peronema Forestry Science Journal Vol 3, No 1 (2014): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Aedes spp have been public health problems, such as dengue, yellow fever, chikungunya and others. The use of chemical insecticides make toxic effects in humans and environment. Therefore, the necessary existence of alternative insecticides that are safer for the environment. One of that is considered as natural insecticide is kecombrang (Etlingera elatior Jack R. M. Sm) flowers. The purpose of this research is to prove that kecombrang flowers extract has potential as an insecticide against Aedes spp. This research is a laboratorial experimental research with true experimental post test only control group design. The repetitions were done three times with four types of solutions which are, control (aquades), and kecombrang extracts 3%, 4.5%, 6%. Every repetitions were perceived at 3 intervals 10 minutes, 20 minutes , 30 minutes. Mortality of Aedes spp seen after 24th hours. From the One Way ANOVA test found significant differences in each flower extract concentration effect kecombrang Based on the result of this research, it is conclude that extract of kecombrang flowers have a potential as an insecticide against Aedes spp and effective in 4.5 % concentrate.Key words: Kecombrang, extract, aedes spp, natural insectiside
Durability of Modified Fiber Plactic Composite (FPC) Against Marine Borer Ade Dwi Fonna Rizki; Luthfi Hakim; Ridwanti Batubara
Peronema Forestry Science Journal Vol 3, No 1 (2014): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The Fiber plastic composite (FPC) board that made from corrugated paper fiber and plastic polypropylene with maleic anhydride (1 % and 2 %) as compatibilizer and benxzoil peroxide (15 %) as initiator (modified). The purpose of this research were to evaluate the quality of the physical properties of modified FPC board, identification kinds of marine borer, and the durability against marine borer. The physical properties was based on JIS A 5905-2003 and JIS A 5908-2003. The durability of modified FPC board against marine borer was based on SNI 01-7207-2006. The Modified FPC board was soaking in the sea of Port Belawan, Medan for six months.The results showed the physical properties of modified FPC board were full fil the standard JIS A 5905-2003 and JIS A 5908-2003. The durability of modified FPC board against marine borer according SNI 01-7207-2006 was classified into very durable and durable. The marine organism which found on modified FPC board were 17 specieses but only 2 specieses classified as marine borers, there are Limnoria sp and Teredo sp. After the split test was known that the pattern of attacks on the modified FPC board is Martesia striata's attack patterns of pholadidae.Keywords: FPC, Marine Borer, Modified, Physical Properties, Sea Of Port Belawan
Sifat Fisis dan Mekanis Papan Partikel Dari Serbuk Limbah Gergajian Dengan Berbagai Kadar Perekat Isosianat Chamvion IR; Tito Sucipto; Luthfi Hakim
Peronema Forestry Science Journal Vol 4, No 1 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Serbuk limbah gergajian kayu mahoni sangat melimpah. Penelitian ini bertujuan untuk menentukan kadar perekat isosianat terbaik terhadap sifat fisis dan mekanis papan semen yang dihasilkan; serta mengevaluasi pengaruh kadar perekat terhadap kualitas papan partikel. Kadar perekat isosianat yang digunakan adalah 6%, 8%, 10%, 12%, dan 14%. Target kerapatan yang ditetapkan adalah 0,7 g/cm3. Jenis perekat yang digunakan ialah isosianat H3M. Papan ditekan dengan kempa panas pada 25 kg/cm2 selama 5 menit dilanjutkan dengan pengkondisian selama 7 hari. Hasil penelitian menunjukkan bahwa nilai sifat fisis yang dihasilkan memenuhi standar JIS A 5908 (2003). Dari hasil penelitian ini kadar perekat terbaik adalah 14%. Kata Kunci : serbuk mahoni, papan partikel, isosianat, kadar perekat  

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