Judul: Mapping of Water Regulation and Recreation Ecosystem Services in Bogor City
Abstrak: Jasa ekosistem merupakan keuntungan yang dapat diperoleh manusia dari ekosistem. Kuantitas dan kualitas jasa ekosistem dapat dipengaruhi oleh penggunaan lahan akibat pertumbuhan penduduk terutama di Kota Bogor. Jasa ekosistem perkotaan seperti pengaturan tata air dan rekreasi merupakan jasa yang penting keberadaannya di Kota Bogor. Penelitian ini bertujuan memetakan potensi kedua jasa ekosistem tersebut. Pemetaan potensi jasa ekosistem dapat berguna untuk mengetahui sebaran dan nilai jasa ekosistem. Potensi jasa ekosistem pengaturan tata air dan rekreasi dinilai dengan menggunakan Analytical Hierarchy Process (AHP) dari parameter penutup lahan dan bentuk lahan. Potensi jasa ekosistem pengaturan tata air di Kota Bogor memiliki nilai yang berkisar antara 3,990 sampai 8,104 dan didominasi oleh kelas rendah dengan luas 5286,61 ha atau sekitar 47,49% luas Kota Bogor. Potensi jasa ekosistem rekreasi di Kota Bogor memiliki nilai yang berkisar antara 3,579 sampai 7,184 dan didominasi oleh kelas rendah dengan luas 4918,57 ha atau sekitar 44,19% luas Kota Bogor.
Keyword: AHP, jasa ekosistem, pengaturan tata air, rekreasi

Judul: Priority of City Forest Locations for Water Conservation in Bogor City
Abstrak: Kota Bogor terus mengalami perkembangan jumlah penduduk yang berimplikasi terhadap pesatnya pembangunan. Hal tersebut menyebabkan tekanan terhadap lingkungan yaitu perubahan tutupan lahan, sehingga kawasan resapan air terus berkurang. Penelitian ini bertujuan menentukan Prioritas lokasi hutan kota untuk konservasi air berdasarkan faktor jasa ekosistem pengaturan air, rencana tata ruang wilayah, tutupan lahan, dan kerapatan vegetasi. Pembobotan faktor dilakukan menggunakan Analytical Hierarchy Process. Prioritas lokasi hutan kota dikategorikan menjadi tiga kelas Prioritas yaitu Prioritas 1 dengan luas 591 ha (5,3%), Prioritas 2 dengan luas total 3.026 ha (27,2%), dan Prioritas 3 dengan luas 7499 ha (67,5%). Prioritas 1 berada pada pola ruang kawasan lindung dengan dominasi berupa kawasan tempat pemakaman umum. Prioritas 2 berada pada pola ruang kawasan budidaya dengan dominasi berupa kawasan perumahan kepadatan sedang., The city of Bogor has experienced continuous population growth, leading to rapid urbanization. This development has exerted immense pressure on the environment, resulting in significant land-use changes and a subsequent decline in water catchment areas. This study aims to prioritize locations for urban forest establishment to enhance water conservation, considering factors such as water regulation ecosystem services, spatial planning, land cover, and vegetation density. The Analytical Hierarchy Process was employed to weight these factors. The prioritized locations for urban forests were categorized into three classes: Priority 1 (591 ha, 5.3%), Priority 2 (3,026 ha, 27.2%), and Priority 3 (7,499 ha, 67.5%). Priority 1 areas predominantly fall within protected zones, often dominated by public cemeteries. Priority 2 areas are primarily located in cultivated zones, with a significant proportion being medium-density residential areas.
Keyword: Hutan Kota, jasa ekosistem, Pengaturan air

Judul: Synthesis of Apatite - Chitosan Composite Using Duck Eggshell and Chitosan with Temperature and pH Control
Abstrak: Composite of apatite-chitosan was prepared by using chitosan as polymer matrix. Calcium phosphate was prepared from CaO and (NH4)2HPO4, which the ratio Ca : P had to be 1.67. Chitosan is produced by deacetilase from biopolymer chitin. Duck eggshell (95% CaCO3) as starting material was converted to be calcium oxide (CaO) through calcinations with temperature 1000oC for 5 hours. In-situ and ex-situ methods were prepared from apatite and chitosan (dissolved with acetate acid 2%). Calcium phosphate prepared for bone implantation, but it is too fragile and brittle to be implant into the body. So addition of chitosan can decrease crystalinity and increase mechanic characteristic (tougher). Composite apatite-chitosan was resulted by fast precipitation. Fast precipitation was held in a breaker glass with nitrogen atmosphere, under controlled temperature at 37oC and pH 7, in order to increase amount of hydroxyapatite. Precipitation with CaO which was dropped by (NH4)2HPO4. Hydroxyapatite and chitosan were appearing at samples with in-situ and ex-situ methods which indicating by peak matching of XRD (closed lattice parameter, crystal size), overlapping at FTIR spectra and supporting by SEM picture (homogenous and agglomerated particle). However, it still needs further research to examine biocompatibility osteoconductive degree of sample by in-vivo and in-vitro test.
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