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. ...
Keyword: 

Judul: Peranan virus rota pada diare anak sapi
Abstrak: Virus rota sebagai salah satu agent penyebab diare pada anak sapi telah dapat dipastikan setelah Mebus et al. (1969) di USA berhasil mengisolasinya dari filtrat feses anak sapi (McNulty, 1976). Pada penelitian selanjutnya McNulty (1978) melaporkan bahwa virus rota selain menyerang anak sapi juga babi, domba, kambing, manusia, unggas, kelinci, tikus, anjing, kucing, rusa dan kuda. Durham dan Johnson (1982) mengatakan bahwa virus rota berbentuk bulat dan mengandung RNA serabut ganda yang dikelilingi atau diselaputi oleh kapsid ganda. Dari bentuk tersebut menyebabkan virus rota terlihat menyerupai roda dan dari sinilah nama rota diberikan (rota = roda). Selanjutnya dikatakan bahwa pada kapsid bagian dalam terdapat antigen yang spesifik terhadap group pada semua virus rota tanpa memandang dari hewan apa virus itu berasal. Sebaliknya kapsid bagian luar mengandung antigen yang spesifik terhadap spesies menurut hewan asal virus tersebut dan antigen inilah yang mempunyai aktifitas hemaglutinasi. Struktur virus rota ada dua macam, pertama yang mempunyai kapsid perlapis tunggal tanpa mampu mengaglutinasikan sel darah merah, kedua virus rota dengan kapsid berlapis ganda dengan kemampuan mengaglutinasikan sel darah merah.
Keyword: 

Judul: Quality enhancement of the inner part of oil palm trunk by close system compression method and by phenol formaldehyde compregnation
Abstrak: Improvement of physical and mechanical properties of oil palm trunk could be done by close system compression (CSC) and by compregnation with fenol formaldehida. The aims of these researches were to determine the maximum compression level by studying the density distribution and stress-strain curves of oil palm trunk, to evaluated the fixation of the inner part of oil palm trunk by close system compression, heat treatment and steam treatment, to measured the physical, mechanical, anatomical and chemical of densified oil palm trunk by CSC, and to evaluated the physical and mechanical of phenol formaldehyde (PF)- densified of oil palm trunk. The results showed that density of oil palm trunk was around 0.23-0.74 g/cm3. The density at the outer part was higher, and then decreasing toward the center of trunk. The stress-strain curves showed that water saturated and wet conditions were easier to compress than that of air dry condition. The compression level increased from the outer part to the center. The maximum compression levels of the center park were 67% in air dry condition and 72-73% in wet and water saturated conditions from their initial thickness. Fixation of the trunk by steam treatment method was achieved at 170 oC for 30 min, by CSC at 180 oC for 30 min, while by heat treatment was not yet fixed even at 200 oC for 180 min. Compression by CSC results in the improvement of the physical and mechanical properties of the inner part of oil palm trunk. The density, MOR, MOE and compression parallel to grain of densified-oil palm trunk were improved 3.33-90%, 14.31-192.81%, 43.22-192.74% and 18.93- 123.20%, from the initial samples (control), respectively. The chemical components especially holocellulose was decreased with the increasing of temperature and time of compression, but the other components (lignin, alfa cellulose, extractive by hot water and by alcohol-benzene) were increased. Then, PF compregnation results in the improvement of the physical and mechanical of the inner part of oil palm trunk. The density, MOR, MOE and compression parallel to grain of PF-densified oil palm trunk were improved 94.12–176.47%, 191.7–309.5%, 108.2–287.5%, and 83.72–191.75%, from the initial samples (control), respectively. The last, the inner part of oil palm trunk after treating by CSC and by compregnation PF is suitable for furniture material.
Keyword: Oil Palm Trunk, Close System Compression Method, phenol formaldehyde, physical and mechanical properties