Judul: Estimation of Carbon Dioxide Emissions Due to Forest and Land Fires in Muaro Jambi Regency, Jambi Province
Abstrak: Kebakaran hutan memiliki dampak serius terhadap perubahan iklim karena menghasilkan emisi gas karbon dioksida. Kabupaten Muaro Jambi adalah kabupaten dengan kebakaran hutan dan lahan terparah di Provinsi Jambi. Penelitian bertujuan menduga emisi gas karbon dioksida yang dihasilkan di Kabupaten Muaro Jambi. Metode yang dilakukan adalah dengan menduga luasan area terbakar menggunakan citra Sentinel-2, kemudian dilakukan perhitungan emisi karbon dioksida menggunakan persamaan Seiler dan Crutzen. Hasil penelitian menunjukkan bahwa jumlah hotspot yang terdeteksi di Kabupaten Muaro Jambi secara berurutan pada tahun 2019, 2020, 2021 dan 2022 sebesar 3367, 18, 6, dan 2 titik. Sementara itu, emisi gas karbondioksida yang dihasilkan pada tahun 2019, 2020, 2021 dan 2022 di tanah mineral sebesar 615,913,55 ton, 4.353,76 ton, 415,90 ton, dan 2.895,54 ton. Sedangkan di lahan gambut emisi yang dikeluarkan sebesar 8.922,62 ton, 4.761,38 ton, 36,14 ton, dan 121,35 ton., Forest fires have a serious impact on climate change because they produce carbon dioxide gas emissions. Muaro Jambi District is the district with the worst forest and land fires in Jambi Province. The study aims to estimate the carbon dioxide gas emissions generated in Muaro Jambi Regency. The method used was to estimate the burned area using Sentinel-2 imagery, then calculate carbon dioxide emissions using the Seiler and Crutzen equation. The results showed that the number of hotspots detected in Muaro Jambi Regency in 2019, 2020, 2021 and 2022 amounted to 3367, 18, 6, and 2 points, respectively. Meanwhile, carbon dioxide gas emissions generated in 2019, 2020, 2021 and 2022 on mineral soil amounted to 615,913.55 tons, 4,353.76 tons, 415.90 tons, and 2,895.54 tons. While in peatlands the emissions released were 8,922.62 tons, 4,761.38 tons, 36.14 tons, and 121.35 tons.
Keyword: Emisi gas karbon dioksida, Hotspot, Kabupaten Muaro Jambi, Tutupan lahan

Judul: Estimation of carbondioxide Emission Of Forest and Land Fire in Tanjung Jabung Timur Regency,  Jambi Province
Abstrak: Kebakaran lahan dan hutan berkontribusi besar pada peningkatan emisi karbon di atmosfer bumi. Emisi karbon ini dapat berdampak buruk terhadap lingkungan. Penelitian ini difokuskan dalam estimasi luas area kebakaran dan estimasi emisi karbon di Kabupaten Tanjung Jabung Timur, Provinsi Jambi. Penelitian dilakukan dengan metode digital untuk menduga luas area terbakar. Peta luasan kebakaran diperoleh dengan menggunakan citra Landsat 8 OLI/TIRS Tier 2. Penghitungan emisi karbondioksida menggunakan persamaan Seiler dan Crutzen. Fluktuasi jumlah hotspots yang terdeteksi pada tahun 2016-2020 menyebabkan perbedaan luas area yang terbakar, jumlah hotspots tertinggi diperoleh pada tahun 2019, sebanyak 6.839 titik pada tanah gambut dan 1.529 titik pada tanah mineral dan merupakan area terluas yang terbakar yaitu sebesar (7.758,17 ha) pada tanah gambut dan (9.434,56 ha) pada tanah mineral. Penelitian ini menunjukkan bahwa besarnya emisi dari suatu wilayah dipengaruhi oleh kandungan biomassa dan luasan area terbakar. Emisi gas CO2 terbesar diperoleh pada tahun 2019 sebesar 507.433,1 ton CO2 pada tanah gambut dan 103.048,2 ton CO2 pada tanah mineral ., Land and forest fires contribute greatly to the increase in carbon emissions in the earth's atmosphere. These carbon emissions may bring negative impacts on the environment. This research is focused on estimating the burnt area and estimating carbon emissions in Tanjung Jabung Timur Regency, Jambi Province. The research was conducted using a digital method to estimate the burned area. A burnt area map was made using Landsat 8 OLI/TIRS Tier 2 images. The carbon emission was calculated by using Seiler and Crutzen (1980) equation. Fluctuations in the number of hotspotss detected in 2016-2020 led to differences in the area burned during the period. The highest number of hotspots found in 2019, detected as many as 6.839 points on peat lands and 1.529 points on mineral soil and was the largest area burned was (7.758,17 ha) on peat lands and (9.343.56 ha) on mineral soil . This research proves that the amount of emissions from an area is greatly influenced by the biomass and burnt area. The largest CO2 gas emissions was found in 2019 which was 507.433,1 ton CO2 on peat lands and 103.048,2 ton CO2 on mineral soils.
Keyword: carbondioxide emission, hotspots, land and forest fire, Tanjung Jabung Timur

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.
Keyword: