Judul: Potensi Kebakaran Hutan di IUPHHK-HT PT. Wana Subur Lestari Kalimantan Barat
Abstrak: Forest and land fire problems have become one of the great issue recently, nationally and internationally. The cause of the fire studied from rainfall rate and fire source in two sides, the in-side which is company and the out-side which is society around concession which related to land clearing. The valuation of potential forest fire in concession area of PT. WSL was so important to be held for preventing forest fire. It can be used as early warning system. Collecting data conducted by indepth interview with the company, and questioner for society in Permata village and Radak II village. The number of respondents are 91 wich are 45 respondents from Radak II village and 46 respondents from Permata village. This research method is snowball method. The result of this research showed that based on the average of rain fall rate per year on 5 years recently is about 3199 mm. It can be concluded that PT. WSL is not prone to get fire. Based on fire source studied, it showed that the company done a land clearing 100% by mechanical tool (using excavator). While the largest potency of fire sources is come from the society in Permata village and Radak village, almost 60% the society in that village still using fire to do land clearing.
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Judul: Potensi Kebakaran Hutan di KPH Bogor Perum Perhutani Unit III Jawa Barat dan Banten
Abstrak: The potential of forest fire can be studied based on forest fire controlling and source of forest fire that is human activity also rainfall. The objectives of this research are to analyze the level of vulnerability forest fire based on rainfall rate from 5 years recently, to study the source of forest fire and analyze the efforts of forest fire controlling in KPH Bogor. The result showed that the average of yearly rainfall rate on recent 5 years is 2 545 mm. It can be categorized into not prone toward forest fire. The potential of forest fire that caused by land clearing was low because it was controlled burning applied by the society. The potential of forest fire that caused by social conflict was quite high due to lack of good relations between KPH Bogor and the society. Less on information about socialization program and less on attention toward the existence of warning board is a ineffective forest fire controlling.
Keyword: rainfall, potential forest fire, KPH Bogor, human activity, forest fire controlling

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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