Judul: Analisis Ekonomi Eksternalitas Kegiatan Produksi Minyak dan Gas Bumi di Laut terhadap Kegiatan Perikanan Tangkap
Abstrak: The offshore oil and gas exploitation activities have significant contribution in fulfilling the world’s oil and gas needs. However, the activities have to face several interest-conflicts with other parties such as marine capture activities that exploited different types of resources on the same location. This study shows that there is negative externality from the fishers’s perception towards the enforcement of safety zone which is located on the radius of 500 meters from the oil and gas production platform. The field study endorsed their assumption that the safety zone has limited their fishing grounds, therefore reducing their income per trip. The result shows that fishing ground’s productivity near the offshore oil and gas production platform area is lower than the productivity in non offshore oil and gas production platform area. On the contrary, the bio-economic analysis shows that the fishing ground productivity near the offshore oil and gas production platform area is higher compared to the productivity in non offshore oil and gas production platform area. The conclusion from both results is that the enforcement of safety zone in offshore oil and gas production platform area affects the marine capture’s productivity in the short run. Meanwhile the safety zone can increase and maintain the productivity in the long run because the production platform is functioning as temporary marine protected area for fish and other creatures in the sea. The findings are also utilized as input factors in designing the alternatives of environmental management model that is beneficial for both activities.
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Judul: Model embedded dinamik ekonomi interaksi perikanan-pencemaran
Abstrak: Penelitian ini menghitung nilai depresiasi dan kerugian ekonomi sumberdaya perikanan yang hilang sebagai akibat aktivitas produksi (tangkap) dan non produksi (pencemaran). Secara umum penelitian ini bertujuan untuk membangun model embedded dinamik ekonomi interaksi perikanan-pencemaran, serta menilai manfaat sumberdaya darn perikanan sebagai akibat kegiatan produksi dan non produksi, serta dampaknya terbadap kesejahteraan. Analisis interaksi perikanan-pencemaran dilakukan melalui model Embedded, dimana faktor non produksi (pencemaran), 'dititipkankan' kedalam model pertumbuhan ikan. Dengan menggunakan pendekatan modifikasi dari fungsi pertumbuhan surplus produksi dan modifikasi dari Pontryagin Maximum Principle, studi ini menghitung nilai kehilangan akibat pencemaran terhadap produksi lestari dan biomass, This research was motivated by a never ending question which arises in fisheries management in Indonesia. Sources after sources tell us that Indonesia is endowed with rich ocean resources especially fisheries which could have generated much potential benefits which in turn could have been enjoyed by all stakeholders involved in fishing activities. However, ironically, this economic potential benefits were not mirrored in the well-being of fishing community. The fact that proverty in fishing community is still persisted is an evidence of such as paradox.
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Judul: Prenilasi Senyawa β-Diketon sebagai Prekursor 3-Prenilflavon
Abstrak: One group of flavonoids that has not been commonly synthesized is 3- prenylflavone. The main objective of this experiment was to synthesize precursor of 3-prenylflavone. Firstly, β-diketone was synthesized via 4 steps from phenol as starting compound with total yield of 24%. Prenylation of β-diketone with prenyl bromide and K2CO3 base produced 4 fractions which were separated by using preparative thin layer chromatography (PTLC) with n-hexane:EtOAc (8:2) as the eluent. Fraction with Rf = 0.80 was further separated by using preparative PTLC with n-hexane:EtOAc (99:1) as the eluent. Two fractions were obtained with Rf = 0.38 and 0.42. The first fraction has been characterized as diprenylated β-diketone with 49% yield. Application of protecting group on the phenolic OH group in β- diketone are needed to obtain monoprenylated β-diketone which can be further cyclized into 3-prenylflavone
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