Judul: Model Dinamika Sistem Emisi Sektor Energi dan Penerapan Konsep Kota HIjau di Kabupaten Bogor, Jawa Barat
Abstrak: Emisi merupakan indikator utama peningkatan efek rumah kaca dengan konsentrasi gas CO2. Gas karbondioksida berpengaruh terhadap kenaikan suhu atmosfer yang berdampak negatif terhadap penurunan kualitas lingkungan. Luas Kabupaten Bogor yaitu 298 839.31 ha dengan jumlah penduduk 5 202 097 jiwa, memiliki aktivitas masyarakat serta perekonomian yang tinggi sehingga mengakibatkan emisi sektor energi meningkat dikarenakan penggunaan bahan bakar yang tinggi. Kota hijau atau green city merupakan konsep kota ekologis yang sehat dan ramah lingkungan, efektif dalam mengatasi permasalahan lingkungan akibat pemanasan global. Berbasiskan pendekatan dinamika sistem, emisi berdasarkan hasil pemodelan pada tahun 2033 adalah 12 735 693.06 ton CO2. Emisi tresebut dapat dilakukan penetralan emisi dengan kombinasi atribut kota hijau yaitu green transportation, green energy, green waste dan green open space. Penerapan konsep kota hijau ini turut berkontribusi bagi Indonesia dalam Sustainable Development Goals (SDGs) pada goal nomor tujuh, dua belas dan tigas belas.
Keyword: green city attributes, emissions, mitigations, modeling

Judul: Model Dinamika Sistem Penyerapan Emisi CO2 di Kota Bogor
Abstrak: Most of the urban pollution is the result of carbon dioxide (CO2) emission from human activities. Green city is a concept of handling these problems by including the environmental aspects in every urban activity. Bogor is one of the cities that have implemented that concept. This research identified CO2 absorption in Bogor and the alternatives to solve the emission problem. CO2 absorption system model was created using software Stella 9.0.2 based on loss – gain emission concept for 30 years prediction. Many urban activities are assumed to increase CO2 emission, while the decrease factor is green open spaces as CO2 sequester. Human activities that contribute to CO2 emission are transportation, industries, energy consumption such as fuel or electricity, house hold waste, and farms. The result of this research, the CO2 emission of Bogor reached 20 027 878 tons in 2042. Combined mitigation in several sectors could reduce CO2 emission by 2 797 667 tons. CO2 emission could be neutralized by reforestation in 2036.
Keyword: Bogor Agricultural University (IPB), loss – gain emission, model, green city, urban pollution

Judul: Apatite Growth Optimation on Chicken Mucouse by Fourier Transform Infrared (FTIR) Characterization
Abstrak: Some experiment had been conducted to grow apatite from supersaturated solution of calcium phosphate ions on chicken mucouse. The calcium and phosphate ions were originated from Ca(NO3)2 and (NH4)2HPO4. Carbonate ions from (NH4)2CO3 was also used as starting solution. Experiment was carried out within about 5 hours at temperature 370 C and pH 7. Value of Ca+ : PO4 3- was 1.67, while molar ratio of CO3 2- : PO4 3- was 0.5 : 1. Molarity of molar ratio CO3 2- : PO4 3- variated approximately 0.15 : 0.30, 0.51 : 1.02, and 0.90 : 1.80. Mass of mucouse powder was constant 0.75 gram. The analysis result of Fourier Transform Infrared (FTIR) showed that the precipitation was apatite carbonate type A and B. In these experiment it was found out that the mucouse reduce the crystallinity of apatite precipitant, and the growth of apatite crystal was optimum at solution with molar ratio CO3 2- : PO4 3- about 0.15 : 0.30.
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