Judul: Valuasi Ekonomi dan Analisis Konservasi Hutan Mangrove di Kabaupaten Kubu Raya
Abstrak: Mangrove is a forest type that grown on tidal areas and has a tolerance to certain value of salinity. As an ecosystem, mangrove plays important roles and functions as a life support system. It is often the benefits and functions of a mangrove ecosystem, are not easily recognizable and measurable so mostly neglected in a regional development planning of an area as is the case in the regency of Kubu Raya. The research is aimed at the identification of mangrove ecosystem benefits, total economic value of a mangrove ecosystem and analysis of mangrove conservation strategy in Kubu Raya Regency. The benefits identified consist of direct benefits (such as commercial wood, fire woods, poles, charcoal, aquatic biota, the use of palm leaves and mangrove seedlings) and indirect benefits (such as prevention of abrasion, storing carbon, producing oxygen, seawater intrusion barrier and producing nutrients), optional and existence benefits. It is also identified that the total economic value of mangroves in Kubu Raya Regency is Rp. 400,018,397,288,- per year. The value is the higest among others and it indicated that the peoples of Kubu Raya District significantly respected to existence of mangrove present and in the future. Production forest managed by private sector (IUPHHK) are more efficient and higher economic values than other (in the protection forest and other land use areas). It indicates that the protection forest and other land use areas not managed optimally yet. In order to enhance the benefit values of mangrove in Kubu Raya District, it needs the following strategies: diversification in the uses of protection forest (land utilization, environmental services, and non wood forest products), increase the efficiency of forest management/utilization by local community, application of profer mangrove silviculture, and implementation of criteria and indicator of sustainable mangrove management.
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Judul: Penilaian ekonomi hutan mangrove: studi kasus Desa Pantai Bahagia, Kecamatan Muara Gembong, Kabupaten Bekasi, Jawa Barat
Abstrak: Tujuan penelitian ini antara lain: 1) Mengestimasi nilai ekonomi total hutan mangrove di Desa Pantai Bahagia, Kecamatan Muara Gembong, Kabupaten Bekasi, Jawa Barat, 2) Mengestimasi nilai ekonomi kerusakan hutan mangrove di Desa Pantai Bahagia, Kecamatan Muara Gembong, Kabupaten Bekasi, Jawa Barat, 3) Mengkaji altematif kebijakan dalam pengelolaan sumberdaya hutan mangrove agar tercapainya pengelolaan yang lestari. Adapun metode analisis data penelitian meliputi metode valuasi ekonomi untuk mengestimasi nilai ekonomi total hutan mangrove serta analisis citra lands at ETM + 7 untuk menentukan luas hutan mangrove yang rusak sehingga dapat diperoleh nilai ekonomi kerusakan hutan mangrove dan dari hasil penilaian ekonomi hutan mangrove Desa Pantai Bahagia dapat menghasilkan suatu kebijakan pengelolaan hutan mangrove agar terciptanya pengelolaan yang lestari. Berdasarkan hasil perhitungan, nilai ekonomi total hutan mangrove di Desa Pantai Bahagia pada tahun 2009 sebesar Rp 15.526.375.185,19. Nilai tersebut didominasi oleh nilai manfaat tak langsung sebesar Rp 7.234.324.448,11, kemudian nilai manfaat keberadaan sebesar Rp 5.115.620.400,00, nilai manfaat langsung sebesar Rp 3.153.228.697,08 dan nilai manfaat pilihan sebesar Rp 23.201.640,00. Berdasarkan hasil analisis citra landsat ETM+7 pada tahun 2008 dan 2009, diperoleh informasi bahwa terjadi penambahan luas air (tambak dan sungai) dari 1440,27 ha (2008) menjadi 1478,79 ha (2009) dan penambahan luas bangunan dari 215,91 ha (2008) menjadi 236,79 ha (2009), sedangkan luas hutan mangrove terjadi pengurangan dari 185,31 ha (2008) menjadi 166,32 ha (2009). Penurunan luas hutan mangrove diduga karena pengalihfungsian mangrove menjadi tambak dan bangunan. Berdasarkan hasil perhitungan, nilai ekonomi total hutan mangrove pada tahun 2009 sebesar Rp 15.526.375.185,19 dan nilai ekonomi total pada tahun 2008 sebesar Rp 17.231.833.884,82, sehingga estimasi penilaian ekonomi kerusakan sebesar Rp 1.705.458.699,63. Sebagai sistem penyangga, keberadaan hutan mangrove sangat berpengaruh terhadap keberadaan makhluk hidup disekitamya. Oleh karena itu diperlukan suatu kebijakan pengelolaan sumberdaya hutan mangrove agar manfaat keberadaan sumberdaya hutan mangrove juga dapat dirasakan oleh generasi mendatang. Dalam rangka pengelolaan sumberdaya hutan mangrove secara lestari, maka diperlukan kebijakan sebagai berikut: 1) Pendekatan Ekosistem, 2) Pendekatan Sosial Ekonomi dan Budaya, 3) Pendekatan Sosial Politik, 4) Pendekatan Hukum dan Kelembagaan.
Keyword: Penilaian ekonomi, Nilai ekonomi total, Nilai ekonomi kerusakan, Hutan mangrove, Bogor Agricultural University, Institut Pertanian Bogor, IPB

Judul: Sintesis α-Fe2O3 menggunakan metode sol gel
Abstrak: In this reseach was succeeded make powder α-Fe2O3 with particle size 202.64 nm. Synthesis using Sol-Gel method with SiO2 coating derived from Si(OC2H5)4 at temperature of 750 oC for 5 hours. Characterization XRD prove that sample form is α-Fe2O3 (11 peaks) and β-Fe2O3 (2 peaks) with crystal size 20.69125 nm and crystallization 44 %. The cystal structure of α-Fe2O3 is rhombohedral and β-Fe2O3 is hexsagonal. Optic characterization show that the sample absorbing light at wavelength less than 480 nm. Bandgap energy of the optical characterization measurments is 2.74 eV.
Keyword: α-Fe2O3, annealing, bandgap energy, sol-gel, crystal structure.