Judul: Ketahanan Oriented Strand Board Bambu terhadap Serangan Rayap dan Kumbang
Abstrak: INTRODUCTION. Bamboo is very promising to be used as OSB raw materials due to its excellent physical and mechanical properties. Unfortunately, naturally bamboo is also very susceptible to termite and beetles attack. In order to complete the information regarding the feasibility of using bamboo OSB for building component, the research associate with the resistance of OSB made from mixing bamboo against termite and powder post beetle attacked were observed. MATERIALS AND METHOD. Three layered OSBs were produced with the size of 30 cm x 30 cm x 1.0 cm. Three (3) bamboo species were used in this experiment ie., Betung bamboo (Dendr ocalamus asper Schult.F) Backer ex. Heyne), Andong bamboo (Gigantochloa verticillata (Willd.) Munro), and Ampel bamboo (Bambusa vulgaris Schrad. Ex Wendl.). Nine (9) c ombination of bamboo OSBs were prepared from these bamboos, namely 1) Betung/Betung/Betung; 2) Betung/Andong/Betung; 3) Betung/Ampel/Betung; 4) Andong/Andong/Andong; 5) Andong/Betung/Andong; 6) Andong/Ampel/Andong; 7) Ampel/Ampel/Ampel; 8) Ampel/Betung/Ampel; and 9) Ampel/Andong/Ampel. The density of OSB was around 0.7 g/cm3. Commercial MDI adhesive was used to bond the strands to OSB in amount of 5%. Four OSBs were prepared for each treatment. The resistances of bamboo OSBs against subterranean and dry wood termites were evaluated in accordance to Indonesia standard (SNI 01. 7207-2006). Meanwhile, the resistance of bamboo OSBs against powder post beetles was evaluated using semi-field test. RESULTS AND DISCUSSION. The results indicated that the resistance of bamboo OSBs against subterranean termite (Coptotermes curvignathus Holmgren) increased 2 times compared to the solid bamboo. All the bamboo solid used belongs to “poor” (level 4) and after converted into OSBs the resistance of bamboo OSBs increased to become “resistance” (level 2). Conversely, the resistance of bamboo OSBs against dry wood termite (Cryptotermes cynocephalus Light) attacked decreased 2 times compared to the solid bamboo. All the bamboo solid used belongs to “very resistance” (level 1) and after converted into OSBs the resistance of bamboo OSBs lowered to become “moderately resistance” (level 3). Based on the values of weight loss obtained, whether OSBs prepared from single species bamboo or mixing bamboos had similar resistance to C. curvignathus and C. cynocephalus attacked. It was observed that the species of powder post beetle attacked the bamboo OSBs was Anobium sp. The resistance of solid bamboo against Anobium sp was varied. The average weight loss of Betung bamboo, Andong bamboo and Ampel bamboo were 3.19%, 17.39% and 25.36%, respectively. The average weight losses of bamboo OSBs prepared in this experiment were in the range of 2.85- 3.87%. Andong bamboo and Ampel bamboo belong to very susceptible to Anobium sp attacked. After converted into bamboo OSBs their resistances were increased around 5 times. Whether OSBs prepared from single species bamboo or mixing bamboos had similar resistance to Anobium sp.
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Judul: Ketahanan Oriented Strand Board dari Bambu Betung (Dendrocalamus asper (Schult. f.) Backer ex Heyne) terhadap Cuaca
Abstrak: Bamboo is promising material for OSB product. The physical and mechanical properties of OSB prepared from bamboo strands was much better than OSB prepared from wood strands. In order to complete the technical data of bamboo OSB, the research related to physical and mechanical properties of OSB before and after exposure to weather at elevated time were impotant to be observed. Betung bamboo (Dendrocalamus asper (Schult. f.) Backer ex Heyne) strands and isocyanate resin were used in this experiment. Prior to be sprayed with adhesive, parts of bamboo strands were steamed at 126 °C, with 1.4 kg/cm2 pressure for 1 hour. Non steam strands were used for control OSB. Two levels of isocynate resin (i.e 4 and 5%) were applied. The physical and mechanical properties of OSB before and after exposure for 1, 3 and 6 months to weather, and extractive substances before and after steam treatment were evaluated. The results indicated that the physical and mechanical properties and chemical properties of OSB were significanrly affected by pretreatment, adhesive levels and duration of exposure to weather. OSB prepared from steamed strands had better mechanical properties compare to control board. The higher the resin level applied resulted in the better the dimensional stability and strength of board. Steamed treated on bamboo strands reduced the extractives of bamboo. Exposure OSB board to weather linearly reduced dimensional stability and strength of board. After 6 months of exposure, severe delamination occurred in the surfaces and sides of board resulted in the physical and mechanical properties can not be evaluated.
Keyword: weathering., steam, weathering., steam, oriented strand board, isocyanate, betung bamboo

Judul: Leukemia pada kucing
Abstrak: Leukemia pada kucing adalah suatu penyakit yang sangat patogen, disebabkan oleh sejenis virus. Virus ini dikenal sebagai Feline Leukemia Virus atau FeLV. FeLV ini oleh beberapa ahli dikatakan hanya bersifat ganas pada hewan kucing. Penularannya bisa secara horizontal maupun congenital. Kucing pada semua tingkat umur dapat terserang oleh FeLV ini. Khusus pada bentuk "thymic leukemia", virus ini hanya menyerang anak-anak kucing berumur diba- wah 1 tahun. Kucing-kucing liar atau yang tidak terpeli- hara jarang sekali terinfeksi FeLV. Selain dari serangan virus FeLV itu sendiri, maka penyakit leukemia ini bisa disebabkan oleh beberapa fak- tor yang sudah ada dalam tubuh hewan dan sangat menunjang perkembangan penyakit ini, yaitu antara lain tumor, agen toksik, cedera oleh kecelakaan dan gangguan hemopoiesis. FeLV menyerang sel-sel darah dalam tubuh hewan se- hingga pembentukan darah berjalan tidak normal. Terlihat sel-sel darah yang belum dewasa sudah beredar dalam sir- kulasi darah. Bentuk dan jumlahnya tidak lagi seimbang dalam tubuh hewan kucing tersebut. Gejala klinis antara lain kekurusan, ikterus, anemia, lemah, anoreksia, dyspnoe, sulit menelan, batuk, dan membran mukosa pucat. Selain itu kelenjar pertahanan tubuh juga membengkak, kemudian terjadi hepatomegali, spleenomegali dan pembengkakan pada ginjal. Terbentuk massa tumor pada beberapa tempat. Secara biopsy pada sumsum tulang akan terlihat be- berapa perubahan. Sumsum tulang berwarna merah tua atau abu-abu. Konsistensinya lunak dan terdapat banyak sekali memproduksi sel darah putih. Melalui gambaran darah leukemia ini lebih mudah didiagnosa. Jumlah retikulosit rendah sekali. PCV 8-15%, hemoglobin menurun, sel darah putih (WBC) meningkat, lim- fosit meningkat, Alfaglobulin juga ada peningkatan, dan banyak eosinofil yang belum dewasa beredar dalam darah…dst
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