Judul: Optimasi Pemanfaatan Sumberdaya Perikanan Tangkap dan Budidaya Kerang Mutiara (Studi Kasus: Teluk Semangka Kabupaten Tanggamus)
Abstrak: The aim of this research are to study the optimum of fishery resource, economic value of spat cultivation and policy optimal allocation the use of resource for fishing and aquaculture. The sampling method used snowball method and purposive sampling for fishermen and for the spat cultivators is a census method. Types of data collected in this study consisted of two sources of data are primary data and secondary data. Semangka Bay resource of Tanggamus District has not been optimally utilized. Actual economic value of fishing in this bay is Rp6.660,200,000.00. The optimal value fishery with a dynamic approach is Rp370,814,200,000.00 in which Sardinella (Sardinella spp.) production could be increased up to 80.01 percent, 12.16 percent Teleosts (Leiognathidae spp.), Anchovies (Stolephorus spp.) 12.16 percent and 5.32 percent Cuvier (Rastrelliger spp.). Actual economic value of spat cultivation based on number of cage units are as follows (1) Rp1,432,379,615,561.00 for 12,340 units (2) Rp1,708,633,661,842.00 for 9,255 units (3) Rp 1,984,887,708,123.00 for 6,170 units and (4) Rp2,208,756,465,239.00 for 3,670 units. Results of policy analysis and optimum utilization of fisheries in the Bay of Semangka cultivation is the cultivation of exploiting the potential of 25 percent or 109.15 ha.
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Judul: Kajian Ekonomi Sumberdaya Perikanan di Perairan Pemangkat Kabupaten Sambas
Abstrak: Penelitian ini bertujuan mengkaji alokasi optimum ikan laut yang didaratkan di Pelabuhan Perikanan Nusantara (PPN) Pemangkat dengan menggunakan Model Bio-economic. Nilai optimum yang dihitung adalah tingkat produksi, jumlah effort dan nilai manfaat sumberdaya. Nilai ini kemudian dialokasikan menjadi tangkapan optimum per effort, jumlah alat tangkap, jumlah nelayan dan nilai manfaat optimal. Hasil perhitungan alokasi optimum sumberdaya ikan di Perairan Pemangkat ini menghasilkan banyaknya tangkapan optimal (quota) per trip yang dapat ditangkap oleh nelayan di perairan Pemangkat. Tangkapan optimal per trip setingkat gill net untuk menangkap ikan demersal pada discount rate 2,89 % adalah sebanyak 15,70 kilogram, tangkapan optimal per trip setingkat purse seine untuk menangkap pelagis besar adalah sebanyak 42,97 kilogram dan pelagis kecil sebanyak 1.435 kilogram. Untuk tangkapan optimal per trip setingkat lampara Dasar untuk menangkap udang dan molusca berturut-turut adalah sebanyak 16,71 kilogram dan 16,71 kilogram. Jumlah alat tangka optimal berdasarkan analisis dinamik adalah sebanyak 10 unit alat setingkat gill net untuk menangkap ikan demersal, 6 unit alat setingkat purse seine untuk menangkap ikan pelagis besar dan pelagis kecil serta 0 unit alat setingkat lampara dasar untuk menangkap udang dan molusca. Konsekuensinya diharapkan jumlah nelayan gill net optimal adalah sebanyak 51 orang, nelayan purse seine 187 orang dan nelayan lampara dasar sebanyak 0 orang.
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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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