Judul: Perubahan Tutupan/Penggunaan Lahan Sebelum dan Sesudah Kebakaran Hutan Menggunakan SIG di Kalimantan Barat
Abstrak: Selama dua dekade terakhir, seperempat hutan tropik di Kalimantan telah mengalami perubahan menjadi daerah pertanian serta daerah perkotaan oleh manusia. Perubahan tersebut diakibatkan oleh adanya kebakaran hutan. Kebakaran dijadikan alat untuk membuka lahan untuk lahan pertanian maupun perkebunan dengan alasan mudah dan murah untuk dilakukan. Studi mengenai kaitan penyebaran titik panas serta kebakaran hutan dan lahan dengan perubahan tutupan/penggunaan lahan perlu dilakukan agar dapat dijadikan data acuan pengelolaan sumber daya alam hayati dan pemantauan kebakaran hutan di wilayah Kalimantan. Pada tahun 2011 hingga 2013 ditemukan 2 066 titik panas yang terindikasi sebagai kebakaran hutan. Titik panas tersebut ditemukan paling banyak di daerah pertanian lahan kering campur (33.00%), hutan rawa sekunder (18.68%), dan hutan sekunder (14.79%). Tiga tahun setelah kejadian, perubahan tutupan lahan paling banyak menjadi hutan lahan kering campur (25.57%), perkebunan (28.02%), dan pertanian lahan kering (10.91%). Hutan rawa sekunder dan hutan sekunder menurun menjadi masingmasing hanya sebanyak 3.63% dan 6.98%. Untuk penggunaan lahan, titik api banyak ditemukan pada areal penggunaan lain (49.92%) dan diikuti hutan tanaman industri (18.50%). Hal ini menunjukkan kebakaran hutan yang terjadi lebih banyak disebabkan oleh pembukaan lahan yang dilakukan masyarakat dibandingkan oleh perusahaan.
Keyword: Kalimantan Barat, kebakaran hutan, perubahan, titik panas, tutupan lahan

Judul: Hubungan antara Titik Panas dengan Perubahan Penutupan/ Penggunaan Lahan (Studi Kasus: Kabupaten Kapuas, Provinsi Kalimantan Tengah)
Abstrak: Land and forest fires in Indonesia have become a serious problem since 1982/1983. Annually the area that was burned widespread, which is caused by the increasing number of forest converted to plantations, agriculture, settlements, and so forth. Indicator commonly used for early detection of forest and land is hotspots, obtained from a meteorology satellite remote sensing. The objectives of this research are to analyze the distribution pattern of hotspots in Kapuas District, analyzed land cover/use change in Kapuas District, analyzed the relationship between hotspots and land cover/use change in Kapuas District, and analyzed the relationship hotspots and rainfall anomaly in Kapuas District. The maximum distribution of hotspots during 2005 to 2011 was indicated in 2006 and 2009; it was expected because of the effect of long term dryness (El-Nino), so the intensity of the fire increased. During 2005 to 2011, many hotspots identified in shrub swamps, shrub, plantations, secondary swamp forest, and secondary upland forest. Hotspots are identified on the site, possibly due to a fire caused by the preparation of agriculture or plantation. It is marked by an increase in land cover change to plantation up to 49.5%, while the secondary swamp forest and secondary upland forest decreased up to 19.2% and 7.83%. The rainfall anomaly is also expected to be able to affect the number of hotspots. When rainfall in the condition of subnormal, then hotspot identified more than when rainfall was above normal.
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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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