Judul: Indeks Kondisi Bangunan dan Sisa Masa Pakai Kayu Komponen Rumah Tinggal Sederhana
Abstrak: The objective of this research was to understand the performances of the buildings and the remaining service lifetime of wood which have been used as components of low cost house, where it was at Alam Sinar Sari Residence Complex in Jl.Delima E213 Cibeureum Darmaga, Bogor. Materials used of this research were the rafters and battens which suffered the most severe degradation to both of these components. All building components were surveyed and assessed these performances. Then, creep testing, physical testing, and mechanical testing of the samples of the house are utilized to estimate the wood life service remain of the house, using the reducing of the estimation model. assessment result of the house performance was two different performances, which were respectively the front and the back of the house due to the time differences as building. The value of robustness from the front which has built on 1996 was 67.6 %, while the back which has built on 2002 the value of robustness was 80.2 %. Wood identification showed the front using Saninten wood (Castanopsis sp.) as battens and Kamper wood (Dryobalanops sp.) as rafters. In other hand, the back of the house using Bentawas wood (Wrightia sp.) as battens and Meranti wood (Shorea sp.) as rafters. Based on the calculation result of the life service remain of wood towards batten and rafter framers of the roof structure, it could be understood that the remaining service lifetime of the front and the back were securely used in 3 years and in 5 years, respectively.
Keyword: rafters, low cost housing, life service, building performance, battens

Judul: Optimation of mangium wood utilization as component of the pre-fabricated seismic resistance house
Abstrak: This research aimed to determine the value of the strength characteristics and strength distribution on ASD/LRFD as well as quality classes of 8 years mangium wood; to examine the characteristics of mangium logs and the processing process, with three most optimal sawing pattern and to find out the reliability and to investigate the behavior of shearwall mangium wood panels on the seismic resistance test. Materials used were 60 pieces of 8 years mangium logs in 22-42 cm diameter and 210 cm length come from HTI PT Inhutani II, South Kalimantan Province. Samples than tested for the physical and mechanical properties, characteristics of wood and its determination of allowable stress based on format ASTM D 2555-06, ASTM D 2915-03 in ASD/LRFD following the RSNI (2002) and ASTM D 5457-04. Processing of wood involves the log gradings; optimization sawing sawmill with three patterns (conventional, live sawing and live sawing pattern on the MOP program) and the sawing process; drying process with a standard schedule International Finance Corporation (2008) and working processes for the manufacture of wood molding. Shearwalls are tested with racking test (ISO/DIS 22452-2009) using a monotonic lateral load and analysis by SNI 1726-2002. There are four shearwall design patterns size (6.8 x 120 x 240) cm consist of straight sheathing, diagonal sheathing, diagonal windowed sheathing and shearwall with diagonal doored sheathing. Result showed that physical properties of Mangium wood such as moisture content reach 13.01% and specific gravity is 0.58. Mechanical properties of small clear specimen consist of average MOEs reach 126,960 kg/cm2, MOR 1,000 kg/cm2. Based on Full Scale-NDT data, MOE value reach 117,298 kg/cm2 The characteristics of mangium wood from PT Inhutani II are small diameter, many defects and most of their stem is not round to nearly round, tapered and straight which will affect the quality of the wood. The output result in sawn timber form are 70.9%, 73.5%, and 74.7% respectively; in rough lumber form in follows 44.9%, 42.4%, and 45.5%; in blanking form in follows 37.9%, 35.5%, and 38.2% and in lumber shearing form in follows 27.7%, 26.4%, and 28.3% each for conventional pattern, live sawing pattern and live sawing pattern on the MOP program. The highest output at the live sawing pattern on the MOP program, which is followed by conventional pattern and live sawing pattern. On the mangium wood drying process, a modified conventional method requires 30 days until 11% MC and 33 days until 9% MC. The cost of molding production process of tongue and groove lumber for the prefabricated house include the transportation costs reach Rp 3,845,495/m, includes in II-III classes strength based on (NI-5 PKKI; 1961). Allowable stress in the term of Fiber Stress (FS) between FS 7 - FS 22 and the average at FS 12 (SKI C-bo-010:1987). Strength reference between E8 - E17 and the E12 on average (RSNI 2002). Mangium wood is so stiff and strong enough that can be recommended as a structural building materials in structures such as pre-fabricated wooden houses shearwall. Weibull distribution was chosen as the standard distribution for the mangium wood strength. 3. The
Keyword: Forest product, Forestry

Judul: Karakterisasi molekuler virus gemini asal tanaman tomat
Abstrak: Virus gemini merupakan salah satu kelompok patogen utama yang menyerang dan menimbulkan kerusakan yang besar pada tanaman sayuran di daerah tropik dan sub tropik. Pada umumnya kerugian yang ditimbulkan oleh adanya suatu epidemi berkisar antara 30%-100%. Gejala tanaman tomat yang terinfeksi oleh virus gemini kadangkala mirip dengan gejala yang disebabkan oleh infeksi virus yang lain khususnya Potyviridae dan Tobamoviridae. Dengan demikian, gejala penyakit saja tidak cukup untuk digunakan dalam mengidentifikasi virus gemini. Pengetahuan tentang karakter molekuler virus gemini pada tanaman tomat yang bergejala menjadi sangat penting dalam mengidentifikasi virus gemini tersebut. Penelitian ini bertujuan untuk mengamati gejala luar, melakukan purifikasi dan mempelajari beberapa karakter molekuler virus gemini asal tanaman virus tomat. Karakter molekuler yang dipelajari meliputi ukuran dan jenis asam nukleat serta ukuran protein. Deteksi virus dengan metode polymerase chain reaction (PCR) dilakukan untuk memperkuat hasil analisis karakter molekuler. Isolat virus gemini asal tanaman tomat yang diperoleh dari Bandung, Jawa Barat ditularkan dengan serangga vektor B. tanaman tomat. daerah tabaci dari dan ke Gejala yang ditimbulkannya berupa penebalan tulang daun permukaan bawah, daun menggulung ke atas atau ke bawah, berkeriput dan tepi daun mengalami klorosis. Virus gemini isolat Bandung ini berhasil dimurnikan dari daun tomat yang bergejala dengan menggunakan metode yang digunakan ..dst
Keyword: virus gemini, tanaman tomat, purifikasi virus, isolasi tanaman