Judul: Potential Carbon Storage of Acacia and Puspa Mixed Stand at KHDTK Haurbentes, Bogor
Abstrak: Forest has an important role in controlling global warming. Forest absorbs CO2 and stores it as plant biomass through the process of photosynthesis. The purpose of this research is to calculate biomass and carbon storage potential of acacia and puspa mixed stand at KHDTK Haurbentes, Bogor. The research was conducted by making sample plots measuring 20 x 20 meters. The measurement of the biomass of saplings, poles, and trees was carried out using a non-destructive method, while the measurement of the biomass of litter and understorey using a destructive method. The analysis of litter and understorey samples to obtain the dry weight of the kiln and stored carbon is carry out at Pengaruh Hutan Laboratory, Faculty of Forestry and Enviroment, IPB. The result of this research showed that potential for biomass and carbon storage of acacia and puspa mixed stand at KHDTK Haurbentes are 31.70 ton/ha and 15.62 ton/ha. The estimation of carbon storage was directly proportional to biomass potential.
Keyword: biomass, carbon, climate change, forest

Judul: Model persamaan alometrik biomassa dan massa karbon pohon Akasia mangium (Acacia mangium Willd.): studi kasus pada HTI Akasia mangium di BKPH Parung Panjang, KPH Bogor, Perum Perhutani Unit III Jawa Barat dan Banten
Abstrak: Increasing concentrations of greenhouse gases like carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFC), perfluorocarbons (PFC) and sulfur hexafluoride (SF6) in the atmosphere already have environmental impacts caused by rising air temperature at the earth. Forests can absorb greenhouse gases by way of transforming CO2 from the air to deposit the carbon stored in trees. Acacia mangium is a fast growing tree species having ability to tolerate wide-range soil conditions, which make this spesies attractive for tree planting in critical lands. This research was conducted in Acacia mangium plantation forest at Parung Panjang Sub-District, Bogor District, Perum Perhutani Unit III, West Java and Banten. The objective of this research are (1) to learning the carbon content of tree biomass component, (2) to learning the allometric equation models for biomass and carbon mass estimation and (3) estimating the carbon stocks of Acacia mangium plantation. Selection of sample trees in each diameter class were conducted by purposive sampling, starting from diameter class 0-5 cm to those of 35-40 cm. Laboratory tests were conducted to determine the carbon content of tree biomass component. Selection of the best equation was conducted by using allometric regression based on the highest R2(adj). The results of the case study on Acacia mangium stands, showed that there is a differences in carbon content of tree biomass component (roots, stems, branches, twigs and leaves). The highest carbon mass is in the main stem of the tree, and the lowest is in the leaves. The model of tree biomass allometric equation of Acacia mangium is W = 0,140928 D2,31 and tree carbon mass allometric equation is C = 0,060255 D2,39. Potency of carbon stocks in Acacia mangium plantation forest at Parung Panjang Sub-District was 25,4183 ton/ha.
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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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