Judul: Kalkulasi Biomassa Karbon pada Ekosistem Mangrove di Pesisir Kabupaten Tangerang
Abstrak: Kabupaten Tangerang memiliki potensi mangrove di wilayah pesisirnya yang berperan penting dalam penyerapan karbon yang disimpan dalam bentuk bimassa mangrove. Penelitan ini bertujuan menentukan kemampuan mangrove dalam menyimpan karbon serta rencana pengelolaannya di Pesisir Kabupaten Tangerang. Penelitian dilakukan di Desa Ketapang, Patramanggala dan Tanjung Pasir. Persamaan alometrik digunakan untuk meghitung biomassa mangrove kemudian stok karbon disetimasi. Hasil penelitian menunjukkan kerapatan mangrove tertinggi sebesar 274 ind/ha.. Rata- rata stok karbon dan serapan emisi karbon jenis Rhizhopora stylosa adalah 0,75ton C/ha (2,74 ton CO2e/ha), jenis Avicennia marina 13,41ton C/ha (49,17 ton CO2e/ha), jenis Avicennia alba 0,50ton C/ha (1,84 ton CO2e/ha) dan jenis Rhizophora mucronata mencapai 0,14ton C/ha (0,51 ton CO2e/ha). Rata-rata stok karbon Desa Ketapang 3,70ton C/ha, Desa Patramanggala mencapai 3,32ton C/ha dan Desa Tanjung Pasir mencapai 3,55ton C/ha Kemampuan mangrove dalam menyerap karbon tertinggi ditemukan pada jenis Avicennia marina dan desa simpanan karbon tertinggi adalah Desa Ketapang., Tangerang Regency has the potential of mangroves in its coastal areas and important role carbon sequestration and absorption in biomass. This study purpose to determine the ability of mangroves to absorb carbon and their management plans in Coastal Tangerang. The research Ketapang village, Patramangala and Tanjung Pasir. Allometric equations are used to calculate mangrove biomass and then carbon stock is estimated. The results showed the average carbon stock and carbon emission absorption of Rhizhopora stylosa is 0.75 tonsC/ha (2,74 tons CO2e/ha), Avicennia marina is 13.41tons C/ha (49,17 tons CO2e/ha) Avicennia alba is 0.50tons C/ha (1,84 tons CO2e/ha) and Rhizophora mucronata is 0.14 tons C/ha (0,51 tons CO2e/ha). The average stock carbon based on different locations, namely Ketapang Village reached 3.70tons C/ha, Patramangala Village reached 3.32tons C/ha and Tanjung Pasir Village reached 3.55tons C/ha The highest ability of mangroves to absorb carbon was found on the Avicennia marina species and the village with the highest carbon is Ketapang Village.
Keyword: blue carbon, mangrove, emission absorption

Judul: Estimasi Cadangan Karbon dan Serapan CO2 di Atas Permukaan Tanah pada Tegakan Mangrove di Kabupaten Rembang, Jawa Tengah
Abstrak: Mangrove biasanya difungsikan sebagai upaya pencegahan abrasi pantai. Hutan mangrove di Kabupaten Rembang terletak pada dua desa, yaitu Desa Pasar Banggi dan Desa Tireman. Tujuan penelitian ini untuk mendapatkan informasi mengenai serapan CO2 pada tegakan mangrove di Desa Pasar Banggi dan Desa Tireman, Kabupaten Rembang. Jenis mangrove yang ditemukan dalam penelitian ini adalah Rhizophora mucronata, Rhizophora stylosa, Rhizophora apiculata, dan Avicennia marina. Penelitian ini dilaksanakan pada bulan Juni-Juli 2022. Pembuatan plot menggunakan metode transek jalur dengan purposive sampling. Biomassa atas permukaan tanah dihitung menggunakan persamaan alometrik dan dikalikan dengan faktor konversi biomassa ke karbon sebesar 0, 47 (IPCC 2006) untuk memperoleh cadangan karbon kemudian dikalikan dengan atom relatif C agar diperoleh serapan CO2 mangrove. Hasil penelitian menunjukkan bahwa kerapatan mangrove tidak begitu mempengaruhi besarnya biomassa serta cadangan karbon. Kerapatan mangrove tertinggi sebesar 8400 ind/ha. Biomassa memiliki hubungan yang positif dengan cadangan karbon dan serapan CO2. Nilai biomassa atas permukaan tanah tertinggi terdapat pada stasiun 3 sebesar 740,69 ton/ha dan biomassa atas permukaan tanah terendah pada stasiun 4 sebesar 348,46 ton/ha. Nilai diamater mempunyai pengaruh yang besar terhadap nilai biomassa. Mangrove di Kabupaten Rembang memiliki cadangan karbon di atas permukaan tanah sebesar 281,18 ton/ha dengan kemampuan penyerapan CO2 sebesar 206,30 ton/ha/tahun., Mangroves usually function to prevent coastal abrasion. Mangrove forests in Rembang Regency are located in two villages, namely Pasar Banggi Village and Tireman Village. The purpose of this study was to find out information about the estimated amount of CO2 absorption in mangrove stands. The types of mangroves found in this study consists of Rhizophora mucronata, Rhizophora stylosa, Rhizophora apiculata, and Avicennia marina. This research was conducted in JuneJuly 2022. Plots were determined using a path transect method with purposive sampling. The aboveground biomass was calculated using an allometric equation and multiplied by a biomass-to-carbon conversion factor of 0.47 (IPCC 2006) to obtain the value of carbon stocks and then multiplied by the relative atomic mass of C to obtain the value of CO2 absorbed by the mangroves. The results showed that mangrove density did not significantly affect the amount of biomass and carbon stock. The highest mangrove density reached 8400 ind/ ha. Biomass provided a positive relationship with carbon stocks and CO2 uptake. The highest aboveground biomass value was found at station 3 reaching 740,69 tons/ha and the lowest aboveground biomass was at station 4 of consisting 348,46 tons/ha. The diameter value has a large influence on the biomass value. Mangroves in Rembang Regency have above-ground carbon stocks of 281,18 tons/ha with a carbon sequestration capacity of 206,30 tons/ha/year.
Keyword: mangrove, biomass, carbon, carbon stock, CO2 sequestration

Judul: The Dynamic of HIV Virus Infection as a Result of Protease Inhibitor Therapy.
Abstrak: Acquired immunodeficiency syndrome (AIDS) is defined as symptoms of deterioration human immune system caused by human immunodeficiency virus (HIV). The virus damages the leucocytes; therefore, once a person infected by the HIV, his/her immune system will be paralyzed and eventually will not be able to survive from any disease. HIV is transmitted in many ways, such as having unsafe sex, using unsterilized syringe, blood transfusion, and many more. So far, there has not been discovered yet a way or a medicine that can totally cure this disease. However, reverse transcriptase inhibitor therapy, protease inhibitor, or combination of those two can decline the growth of virus inside the body of the infected person. Therefore, the immune system will be enhanced back to normal phase. In this paper, will analyze the effect of protease inhibitor therapy on the dynamics of virus inside the blood with different value of effectiveness. There are two mathematical models of protease inhibitor therapy to consider, i.e. perfect and imperfect protease inhibitor. The perfect protease inhibitor therapy hinders the virus to grow well and not to infect healthy leucocytes. On the other hand, the imperfect one cannot completely detained the virus growth.
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