Judul: Sistem Peringkat Bahaya Kebakaran Hutan di Propinsi Kalimantan Barat
Abstrak: Land cover over West Kalimantan consists of forests, swamps mixed with peat, shrubs, and reeds. Field data of 2009 indicate that hotspots in the region mostly observed from May to August 2009. The largest number of hotspots indicate that region has great potential for experiencing forest fires. Impact of forest fires causes financial losses of local as well as non-local regions. The negative impact of forest fires can be minimized by makes plans of forest fire control, whereas the plan can be made easier if the level of fire danger could be known earlier. Keetch Byram Drought Index system is a popular system which is used to determine the rate of danger of forest fire in West Kalimantan. Calculation of this index only requires observational data of daily rainfall and daily maximum temperature. When a larger value of KBDI prevails, the potential of forest fires increases. On the other hand, when the value of KBDI is small, the probability of forest fire becomes less. Probability of forest fire in 2010 may be estimated fire danger rating using the previous data period. The average daily maximum value of KBDI in 1990 until 2009 show that West Kalimantan has a relative high level of fire danger. Region around Supadio and Sintang weather stations reach an extreme class value.
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Judul: Penilaian bahaya kebakaran hutan dengan menggunakan Indeks Kekeringan Keetch Byram (Keetch Byram Drought Index / KBDI) di RPH Sumberkima Propinsi Bali
Abstrak: Dalam usaha pencegahan dan penanggulangan kebakaran hutan diperlukan suatu manajemen pengendalian kebakaran hutan (forest fire management). Salah satu upaya untuk melakukan pencegahan kebakaran hutan ini yaitu dengan melakukan Penilaian Bahaya Kebakaran Hutan (Fire Danger Rating). Metode Penilaian Bahaya Kebakaran telah banyak dikembangkan untuk menilai tingkat bahaya kebakaran. Indeks Kekeringan Keetch-Byram (KBDI) baru-baru ini dikembangkan untuk menilai bahaya kebakaran hutan di Kalimantan Timur. Menurut Deeming (1995), sistem ini dinilai dapat diandalkan sebagai model yang diusulkan dalam sistem penilaian bahaya kebakaran. Keuntungan KBDI terletak pada pengumpulan data yang semuanya bisa diperoleh di stasiun klimatologi, yang berupa rata-rata curah hujan tahunan, curah hujan harian dan temperatur harian maksimum. Selain itu KBDI dapat dihitung secara manual dan persamaannya diprogram ke dalam kalkulator atau komputer. Penelitian bertujuan untuk menilai bahaya kebakaran hutan pada hutan tanaman dan lapangan terbuka serta penerapan KBDI sebagai Early Warning System di Propinsi Bali.
Keyword: forest fire

Judul: Optimization of Alginate-Chitosan Microcapsules Formation for Leydig Cells Encapsulation
Abstrak: Hypogonadism is a clinical condition characterized by low concentrations of testosterone. It is caused by malfunction of Leydig cells in producing testosterone. Encapsulation method will protect the transplanted cells from the immune system rejection. The aims of this study was to optimize the formation of microcapsules for Leydig cells encapsulation. The microcapsules were made of alginate and chitosan as the first and the second coating agents, respectively. The result showed that the minimum concentration of alginate was 1.5% (w/v) with a viscosity of 33.8 cPs, resulted spherical microcapsules with diameters of 230-270 µm. The optimum concentration of chitosan as the second coating agent was 0.5% (w/v), resulted spherical microcapsule with mechanical stability in 4 hours. Leydig cells can be trapped inside the capsule with a density that proportional with concentration of cells used in the encapsulation.
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