Judul: Ketahanan Papan Partikel Kayu Kempas (Koompassia malaccensis Maing.) dan Kayu Tusam (Pinus merkusii Jungh. et de Vr.) terhadap Serangan Rayap Tanah (Coptotermes curvignathus Holmgren.)
Abstrak: INTRODUCTION. One of small diameter log utilization is by composite products, for example particle board because particle board can ignoring size and quality of wood as its raw material. The utilization of small diameter log into particleboard excpect to cover its low durability properties. So the research needed to find the durability of small diameter log particle board. The purpose of this study was to determine the durability of particleboard from Kempas and Tusam to termite attack (Coptotermes curvignathus Holmgren). MATERIALS AND METHOD. This study used particleboard made from Kempas and Tusam woods with density target were 0.8 g/cm3 and 0.9 g/cm3. This particleboard were adding urea formaldehyde (UF) 12% and paraffin 2%. Durability test against subterranean termite attack were used methods based on SNI 01.7207-2006. Testing with these method was determining the durability of particleboard based on the value of particleboard weight loss, feeding rate and termite mortality during the test period. RESULTS. The result gained after test of termites attack are Kempas wood have smaller weight loss than Tusam wood. Statistically wood species factor showed a significant result also density target factor. Based on average value of weight loss, Kempas wood has better durability properties than Tusam wood. Density target 0,9 g/cm3 have smaller average value of weight loss than density target 0,8 g/cm3. Compared with solid wood, there insignificant different statistically between solid wood and particleboard, thus durability properties of solid wood and particleboard disposed equal. Termites mortality are high, by interval 80,5%-100%. In the end of test there wasn’t any living termite on particleboard, but on solid wood there was any. Feeding rate value on Kempas wood was smaller than Tusam wood.
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Judul: Ketahanan Papan Komposit dari Limbah Kayu dan Karton Gelombang terhadap Serangan Rayap Tanah (Coptotermes curvignathus Holmgren)
Abstrak: This research was designed to determine the level of composite boards resistance against subterranean termites C. curvignathus. The composition of the adhesive between the water-based polymer isocyanate (WBPI) and melamine-formaldehyde (MF) were 1:0, 1:4, 0:1, and paraffin content of 0, 4, 8% based on oven dry particle and corrugated carton. The produced composite boards consisting of three layers. The face and back layers made of corrugated carton waste and the core layer was made of wafer wood waste. The board target density was 0.7 g cm-3. The board was hot pressed at 170 ºC with specific pressure of 25 kgf cm-2, for 12 minutes. The composite boards resistance were tested according to Japanese Standard JIS K 1571:2004. Research results show that B8 type composite board (WBPI-MF were 1:4 and paraffin content of 8%) performed the best result compared to the other types. B8 type composite boards can be determined as the optimum conditions for the composite board production made of wood waste and corrugated carton.
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Judul: Infeksin virus rota pada anak babi
Abstrak: Virus Rota sudah lama diduga sebagai salah satu penyebab diare pada anak babi yang baru dilahirkan. Hal ini diperkuat dengan berhasilnya Mebus dan kawan-kawan mengidentifikasi virus Rota pada kejadian diare yang ter jadi pada anak sapi yang baru dilahirkan. Infeksi virus Rota merupakan hal yang serius, kejadian yang mewabah pernah dilaporkan di Amerika Serikat, Inggris, Kanada dan Australia. Sedangkan kejadian di Indonesia yang dihubungkan dengan infeksi virus Rota belum dilaporkan. Virus Rota termasuk keluarga Reo viridea. Sesuai dengan namanya, virus Rota menyerupai roda (Rota = Wheel), mengandung asam nukleat (nucleid acid) yang berupa asam nukleat ribo (ribo nucleid acid, RNA) dan berserabut ganda (double stranded), tidak mempunyai selubung (envelop atau peplos). Hewan rentan adalah hewan yang berumur sangat muda. Selain menyerang babi, dapat pula menyerang sapi, domba, rusa, anjing, kucing, tikus, kelinci, unggas dan manusia. ...
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