Judul: Hubungan Curah Hujan dengan Kejadian Kebakaran Hutan dan Lahan di Provinsi Sumatera Selatan
Abstrak: Forest existence in Indonesia is vulnerable due to a disturbance, particularly forest fire. One of the causes of forest and land fire is the weather condition which is so fierce in the drought season. South Sumatera is an area with high vulnerability of forest fire, it is included into three provinces with the highest forest fire occurrence in Indonesia. This research aim to analize the influence of precipitation toward the forest and land fire occurrences at South Sumatera province. The result shows that the drought season in South Sumatera occur from July until September, with the peak season at August. The number of hotspot increase between May until October with peak of forest fire occurrence at September, right after the peak of drought season at August. It is clearly showed that daily and 10-daily mean of daily precipitation could be used to explain forest fire occurences. The result of this research emphasize that forest fire prevention in South Sumatera strongly suggested to be started at May when the number of precipitation decrease drastically and the number of hotspot increase
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Judul: Hubungan Curah Hujan dan Titik Panas (Hotspot) Sebagai Indikator Terjadinya Kebakaran Hutan dan Lahan di Provinsi Jambi
Abstrak: Kebakaran hutan dan lahan selalu terjadi setiap tahun di Indonesia, terutama di Pulau Sumatera khususnya di Provinsi Jambi. Provinsi Jambi termasuk salah satu wilayah yang sering menyumbangkan hotspot sebagai indikator kebakaran hutan dan lahan. Iklim merupakan salah satu faktor alami yang berpengaruh pada terjadinya suatu kebakaran hutan di Indonesia. Tujuan penelitian ini adalah untuk menganalisis hubungan antara hotspot dengan curah hujan terhadap terjadinya kebakaran hutan di Provinsi Jambi periode 2013-2017. Analisis data jumlah dan luasan kebakaran hutan dan data curah hujan yang telah direkapitulasikan berdasarkan bulan pertahunnya dianalisis menggunakan analisis deskriptif kualitatif. Jumlah hotspot terendah pada setiap tahunnya terjadi pada bulan Mei-September, pada bulan-bulan tersebut terjadi musim hujan di Provinsi Jambi. Sedangkan jumlah hotspot tertinggi pada setiap tahunnya terjadi pada bulan Desember-Januari, pada bulan-bulan tersebut terjadi musim kemarau di Provinsi Jambi. Tahun 2015 memiliki jumlah hotspot yang terbesar yaitu 60 228 titik, dan jumlah terendah pada tahun 2016 yaitu sebanyak 47 335 titik.
Keyword: curah hujan, hotspot, kebakaran

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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