Judul: Analisis Hubungan Kadar Karbon dengan Berat Jenis Kayu Jati (Tectona grandis L. f.)
Abstrak: One of the environmental issues associated with forest is climate changing due to global warming caused by rising of greenhouse gases, such as carbon dioxide (CO2). Forests absorb carbon dioxide during the process of photosynthesis. The less number of forest caused less carbon dioxide absorbed and more carbon dioxide can thicken the blanket of greenhouse gases in atmosphere. Reforestation and afforestation were done in order to reduce the green house effect. Teak (Tectona grandis L. f.) belonged the kind of hardwood. Teak also has ability to hold the top soil, prevent the erosion, absorb CO2 from the air and it has a high economic value. The research was conducted at the KPH Balapulang Perhutani Unit I Central Java. The purpose of this study was to determine the relationship between levels of carbon with density found in teak (Tectona grandis L. f.). The sample of trees is selected based on class of age, namely (1) the diameter distribution it’s age classes, (2) the sample of tree must be healthy and the form are normal, and (3) sample of trees should represent average conditions of Teak trees in age classes concerned. Laboratory test was conducted to determine the specific weight and carbon content on any part of the tree. The equation which is obtained based on the regression results are used to determine the closeness relationship between the carbon content and the density of the wood teak (Tectona grandis L. f.). The results showed that there was a significant difference in the value of the carbon content and density in each part of the tree. The greatest density has found in the roots and the largest carbon content has presented in the trunk. The closeness equation between carbon content and wood density formulated in 𝑌=112,20𝑋10,41𝑋2−0,09.
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Judul: Persamaan Alometrik Biomassa dan Massa Karbon Pohon Jati (Tectona grandis Linn. f.) (KPH Balapulang, Perum Perhutani Unit I, Jawa Tengah).
Abstrak: The forest contribute to reduce greenhouse gases (GHG) that become trigger global climate change by binding the CO2 gas in the atmosphere. In the climate change convention entitled Conference of the Parties held in 1997, Kyoto Protocol was declared. One of the contents of this protocol is used by the developed countries as the basis to finance low-pollution project in developing countries. Calculating the forest carbon mass using allometric equations of biomasss and carbon mass is still rarely done, therefore the research is needed to gain further information. The Teak tree (Tectona grandis Linn. f.) is known as a high-quality commercial wood and it is widely planted in Java Island. This research was conducted at KPH Balapulang, Perum Perhutani’s Unit I, Central Java. The objective of this research is to get allometric equation of biomass and carbon mass for Teak tree (Tectona grandis Linn. f.). Selection of sample trees in each age class was conducted by purposive sampling, ranging from age class 1 to age class 5. Laboratory test were conducted to determine the carbon content in each part of the tree. Best equation was selected conducted using allometric regression based on the highest R2(adj), (real level) p <0,05, Fcount > Ftable and smallest standard deviation (s). The results of the this study showed the differences of the carbon content in various parts of the tree (trunk, branches, twigs, leaves, and roots). Allometric equations selected for biomass Teak tree (Tectona grandis Linn. f.) is B = 0,1383 D2,45 and allometric equation selected for Teak tree carbon mass is M = 0,0933 D2,44.
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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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