Judul: Mangrove Ecotourism Services Assessment in Mangrovesari Marine Tourism Village, Kaliwlingi, Brebes Regency, Central Java
Abstrak: Wilayah pesisir Kabupaten Brebes memiliki kawasan mangrove dengan potensi nilai ekonomi yang tinggi. Salah satu jasa ekosistem mangrove adalah jasa budaya berupa ekowisata. Desa Wisata Bahari Mangrovesari mengalami penurunan kondisi lingkungan yang disebabkan oleh kurangnya informasi mengenai penilaian terhadap jasa ekowisata mangrove. Penelitian ini bertujuan menghitung nilai ekonomi ekowisata mangrove, serta mengidentifikasi faktor-faktor yang mempengaruhi kegiatan wisata. Metode penarikan sampel yang digunakan dalam penelitian ini purposive sampling dengan teknik pengumpulan data berupa wawancara. Valuasi dilakukan menggunakan Willingness to Pay (WTP) dan Travel Cost Method (TCM). Nilai ekonomi ekowisata mangrove Desa Wisata Bahari Mangrovesari dari pendekatan WTP sebesar Rp 490.524.000/tahun, sedangkan nilai ekonomi yang diperoleh dari pendekatan TCM sebesar Rp 170.028.000/tahun. Faktor-faktor yang berpengaruh nyata dalam kesediaan membayar adalah pendidikan dan pendapatan. Faktor-faktor yang yang berpengaruh nyata dalam jumlah kunjungan wisata diataranya, pendidikan, waktu luang, dan biaya perjalanan., The coastal area of Brebes Regency has mangrove areas with high potential value. One of the mangrove ecosystem value is cultural services in the form of ecotourism. Mangrovesari Marine Tourism Village has experienced a decline in environmental conditions caused by a lack of information regarding the valuation of mangrove ecotourism services. This study aims to calculate the economic value of mangrove ecotourism, and identify factors that influence tourism activities. The sampling method used in this study was purposive sampling with data collection techniques in the form of interviews. Valuation is done using Willingness to Pay (WTP) and Travel Cost Method (TCM). The economic value of mangrove ecotourism in Mangrovesari Marine Tourism Village from the WTP approach amounted to IDR 490,524,000/year, while the economic value obtained from the TCM approach amounted to IDR 170,028,000/year. Factors that have a real effect on willingness to pay are education and income. Factors that have a real effect on the number of tourist visits include education, leisure time, and travel costs.
Keyword: economic value, mangrove ecotourism, Travel Cost Method, Willingness to Pay

Judul: Potential of Mangrove Resources for Ecotourism Development in Pejarakan Village, Buleleng Regency, Bali
Abstrak: Potensi ekosistem mangrove yang berada di Desa Pejarakan, Kabupaten Buleleng tergolong cukup tinggi untuk dijadikan ekowisata, hal ini didukung oleh keanekaragaman jenis mangrove yang beragam, potensi biota yang tinggi, dan objek pemandangan yang indah. Penelitian ini bertujuan untuk menganalisis potensi sumberdaya mangrove untuk pemanfaatan ekowisata serta merumuskan strategi pengelolaan ekowisata mangrove di Desa Pejarakan, Kabupaten Buleleng, Bali. Penelitian ini berlokasi di ekosistem mangrove PT Agung Menjangan Mas, Tambak Pejarakan BBRBLPP, Desa Pejarakan. Data yang diambil berupa data parameter kesesuaian wisata mangrove, parameter lingkungan, dan parameter sosial ekonomi. Analisis yang dilakukan berupa analisis kesesuaian wisata (IKW), daya dukung kawasan, willingness to pay, persepsi masyarakat, serta analisis SWOT. Hasil penelitian yang didapat sesuai untuk dikembangkan menjadi ekowisata dengan nilai IKW kategori sesuai pada dua titik dan sangat sesuai pada satu titik. Nilai DDK sebesar 234 orang pengunjung per hari dengan panjang lintasan tracking mangrove sepanjang 1.461 meter. Analisis WTP yang didapat untuk tiket masuk sebesar Rp. 15.833, strategi pengembangan yang dapat dilakukan adalah strategi agresif, dan memiliki tiga prioritas strategi utama., The potential of mangrove ecosystems in Pejarakan Village, Buleleng Regency, is quite high to be used as ecotourism; this is supported by the diversity of diverse mangrove species, high biota potential, and beautiful scenic objects. This study aims to analyze the potential of mangrove resources for ecotourism utilization and formulate a mangrove ecotourism management strategy in Pejarakan Village, Buleleng Regency, Bali. This research is in the mangrove ecosystem of PT Agung Menjangan Mas, BBRBLPP Teaching Pond, and Pejarakan Village. The data taken is in the form of data on mangrove tourism suitability parameters, environmental parameters, and socioeconomic parameters. The analysis carried out is in the form of tourism suitability analysis (IKW), regional carrying capacity, willingness to pay, community perception, and SWOT analysis. The results of the research obtained are suitable to be developed into ecotourism, with the IKW value of the category at two points and very appropriate at one point. The DDK value is 234 visitors per day with a mangrove tracking track length of 1.461 meters. According to the WTP analysis obtained for entrance tickets of Rp. 15.833, the development strategy that can be done is aggressive and has three main strategic priorities.
Keyword: Mangrove ecosystem, Tourism suitability index, Willingness to pay

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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