Judul: Properties of Oriented Stand Board (OSB) made from Mixing Bamboo
Abstrak: This study evaluates the effects of strand combination, and durability of OSB againts termites attack on the properties of oriented stand board (OSB) made from mixing bamboo species, that capable to produce high quality of OSB made from mixing bamboo. This research was making of OSB with the core layer arientation perpendicular to the face and the back layers. Nine straind combinations from three strand bamboo (T) (Gigantochloa apus (J.A. and J.H. Schultes) Kurz). Were manifactured, namely BBB, BAB, BTB, AAA, ABA, ATA, TTT, TBT, ana TAT. Bonded with 5% of Methylene Diphenyl Diisocyanate (MDI).
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Judul: Properties of oriented strand boards made from some species of bamboo
Abstrak: Bamboo is one of lignocellulotic material from non-timber forest product that have great potential as a wood substitution for OSB's raw material. In order to improve physical and mechanical properties of the OSB boards, the bamboo's strands pre-treated by steaming. Steaming pre-treatment was reported could improve dimensional stability and mechanical properties of the boards (Haryadi 2011; Iswanto et al. 2010; Rowell et al. 2002). Adhesive is important element in the manufacture of OSB due to its role as a binder constituent elements of wood. Isocyanate has a lot of advantages, i.e. high reactivity, good bonding strength and high durability, therefore could produce product with high physical and mechanical performance (Kawai et al. 1998). However, its cost that relatively higher than other adhesive based on formaldehyde may limits its utilization in industry. Utilization a mixture of formaldehyde and non formaldehyde adhesive (PF and ISO) with pre-treatment on the strands by steaming was expected contribute on the properties of the boards. In order to determine mechanical properties of the boards, destructive and non-destructive evaluation were taken in this study. The purpose of this study is to develop high quality of OSB that can fulfill the standard in its physical and mechanical properties. The plan of experiments was done by using completely randomized design with two independent variable (Factor A and B). There is also one confounding variable that have no interaction with other variables. Pre-treatment variation (Factor A) is the first factor that consist of 2 levels: steam (a1) and non steam (a2), while the second factor was composition of adhesive on the face, core, and back which consist of 4 levels: 3 layers of strands were bonded by using isocyanate (b1), 3 layers of strands were bonded by using phenol-formaldehyde (b2), face and back layer were bonded by using isocyanate while core layer was bonded by using phenol-formaldehyde (b3), and face and back layer were bonded by using phenol-formaldehyde while core layer was bonded by using isocyanate (b4). Group (C) consist of three different bamboo species, which are bamboo betung (c1), bamboo andong (c2) and bamboo tali (c3). Based on physical evaluation of OSB, the obtained values as follows: density 0.73 – 0.79 gr cm-3; MC 7.19 - 9.53%; TS 24 hours 3.54 – 11.57%; WA 24 hours 21.72 - 39.62%. Whereas from mechanical evaluation was obtained the values as follows: IB 3.52 - 13.82 kgf cm-2, MOR dry // 444 - 925 kgf cm-2, MOR dry ┴ 132 - 256 kgf cm-2, MOR wet // 264 - 612 kgf cm-2, MOR wet ┴ 85 - 187 kgf cm-2 , MOE dry // 50503 - 116044 kgf cm-2, MOE dry ┴ 9436 – 18126 kgf cm-2, MOE wet // 33536 – 9041 kgf cm-2, MOE wet ┴ 6550 – 12839 kgf cm-2. The results of non destructive evaluation (NDE) towards stiffness (MOEd) by using simple regression analysis showed that NDE could not used to estimate Modulus of Elasticity static (MOEs) and Modulus of Rupture (MOR). All parameters evaluated for physical properties of OSB, and almost all parameters for mechanical properties fulfill the standards
Keyword: bamboo, isocyanate, OSB, phenol formaldehyde, steam and non steam.

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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