Judul: Valuasi Ekonomi Sumberdaya Alam Kawasan Panas Bumi Kamojang Jawa Barat
Abstrak: Natural resource is something the can utilized for various purposes and needs of human life. Natural resources must always be well kept and preserved, because of its limited resources. Kamojang geothermal area is an area containing abundant of natural resources, where the geothermal energy is converted to electricity. Besides containing the geothermal potential energy, Kamojang is also an area of Nature Park, Production Forest, Horticultural Agriculture and ecotourism. The area of Kamojang is located in the border of two different regions: Regency of Bandung and Regency of Garut in West Java. The regular control is conducted by the PT. Pertamina Geothermal Energy as administrator of Kamojang geothermal area and BKSDA of West Java as administrator of Nature park and Ecotourism. Therefore, preservation of Kamojang area is still maintained. By appropriate management from PT. Pertamina Geothermal Energy and the local governments of Kamojang area, it is expected that this area can be better quality of environment in the future. The direct use value significances of Kamojang geothermal area is IDR 1.810.197.943.950, while its indirect use value significances is IDR 3.011.714.430. The existence value of natural resources in Kamojang geothermal area is IDR 8.023.230.000, and the bequest values of natural resource in Kamojang geothermal area is IDR1.139.490.000. The total economic value derived from Kamojang geothermal area is IDR 1.822.372.378.380.
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Judul: Model Pengelolaan Berkelanjutan Kawasan Taman Wisata Alam Sumber Semen di Kabupaten Rembang
Abstrak: Sumber Semen Natural Tourism Park is the only conservation area located in Rembang Regency. This area is designated as a protected area by two ministries, namely the Ministry of Environment and Forestry and the Ministry of Energy and Mineral Resources. Confirmed by Presidential Decree Number 26 of 2011 concerning Designation of Groundwater Basins as Conservation/Protected Areas. One of the reasons is that this area is the largest water recharge area in Rembang Regency which is part of the North Kendeng Karst Mountains area. However, some parties are not aware of the value possessed by Sumber Semen Natural Tourism Park so that the willingness to participate in managing the area is still low. This study aims to estimate the total economic value of the area, determine the level of community dependence, determine the status of sustainable management of the area and develop a model for sustainable management of the Sumber Semen Natural Tourism Park area. This research is expected to be taken into consideration for stakeholders in making decisions related to Sumber Semen Natural Tourism Park, either directly or indirectly. This research was conducted at Sumber Semen Natural Tourism Park, Gading Village and Tahunan Village in 2021. The respondents used were 2% of the respondent population, both visitors and the research village community. Data collection was carried out by interviews, field observations, biodiversity exploration and literature study. Then analyzed by benefit transfer, willingness to pay and total economic value to estimate the total economic value of the area, analysis of economic benefits (share and cover) to determine the level of community dependence on the area, and sustainability analysis to determine the area's sustainability status. All analysis results are taken into consideration in developing a sustainable management model for the Sumber Semen Natural Tourism Park area. The total economic value is estimated by identifying the potential in Sumber Semen Natural Tourism Park. The potential in question is the potential of flora, fauna, springs, environmental services and forest carbon stocks in the area. Exploration results showed a diversity of identified flora as many as 124 species. It was found that there were still many woody species, such as teak (Tectona grandis) and two types of mahogany (Swietenia mahagoni and Swietenia macrophylla). This sufficiently illustrates the history of Sumber Semen Natural Tourism Park which was formerly eco-tourism area managed by Perhutani KPH Kebonharjo. Fauna diversity identified 6 species of birds, 1 mammal, 2 herpetofauna and several butterflies. Utilization of water is carried out for tourism activities, agricultural irrigation and fulfillment of household clean water needs. Utilization is carried out by the surrounding community and PDAM Banyumili, Rembang Regency, to meet the clean water needs of 4 sub-districts in Rembang Regency. The minimum estimation result of forest carbon stocks is 468.31 tons/ha. The estimated total economic value of the area is IDR 12,486,219,121. This value is obtained from the direct use value in the form of tourism activities, agricultural irrigation and household clean water of IDR 7,961,788,620, the indirect use value of forest carbon stocks of IDR 164,596,754, the optional value of biodiversity of IDR 98,573,961 and
Keyword: community dependency level, economic valuation, environmental  services, sustainability status, sustainable management

Judul: Penggunaan hemolisin anti darah ayam dalam uji pengikatan komplemen (Complement Fixation Test)
Abstrak: Penelitian ini bertujuan untuk mengetahui bahwa hemolisin dapat diperoleh dari inokulasi sel darah merah ayam pada kelinci sehingga memudahkan pelaksanaan uji pengikatan komplemen (Complement Fixation Test) di lapang karena Ketersediaan ayam lebih menjamin. Untuk memeperoleh hemolisin, dalam penelitian ini digunakan kelinci dari spesies Oryctulagus cuniculus yang telah diinokulasi sel darah merah ayam. Hemolisin yang dihasilkan kemudian diuji untuk mengetahui titernya dengan menggunakan metode uji reaksi pengikatan komplemen yang biasa digunakan di laboratorium dan juga dengan modifikasi. Penelitian ini menunjukkan bahwa hemolisin dapat diperoleh dari inokulasi sel daralı merah ayam yang menghasilkan titer tinggi. Titer hemolisin yang tinggi diperoleh dari pengujian titrasi hemolisin dengan modifikasi metode yang biasanya digunakan di laboratorium yaitu sebelum penambahan komplemen, hemolisin (Hn) dan RBC tidak diinkubasikan dalam penangas air suhu 37°C.
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