Judul: Studi Pertumbuhan Kepiting Bakau (Scylla serrata Forskal, 1997) di Perairan Karangsong, Kabupaten Indramayu, Provinsi Jawa Barat.
Abstrak: Scylla serrata is one of dominant catches in Karangsong water using bubu. High continously catch on activity could reduce on number of the mud crab population. This study was conducted in Juni-September 2013. Crab sampling was conducted in Karangsong water each 1 month. Length frequency distribution of male mud crab ranged between 60-138 mm, while females between 74-139 mm. Crab’s growth patterns in water of Karangsong is negative allometric. Through the analysis of growth parameter estimation, can be obtained K = − ln (􀜾����), L∞ = 􀯔���� 􀬵����􀬿����􀯕����, and t0 for mud crab males and females are respectively, K equal to 0,39 and 0,42 per month, L∞ equal to 157.35 and 147.99 mm, with t0 - 0,26 and -0,24 months
Keyword: Growth Parameter, Indramayu, water of Karangsong, Giant Mud Crab (Scylla serrata)

Judul: Pertumbuhan dan Produktivitas Kepiting Bakau (Scylla serrata) di Perairan Delta Cimanuk, Indramayu, Jawa Barat
Abstrak: Kepiting bakau (Scylla serrata) merupakan organisme perairan yang berasosiasi dengan ekosistem mangrove. Penelitian dilaksanakan di Pabean Ilir dan Pagirikan dengan tujuan untuk mengestimasi pertumbuhan, produktivitas sekunder dan produktivitas tangkapan kepiting bakau di dua lokasi yang memiliki kondisi mangrove berbeda. Observasi dilaksanakan selama tiga bulan sejak Agustus hingga Oktober 2014. Hasil nilai b dan faktor kondisi menunjukkan kepiting bakau di Pabean Ilir memiliki pertumbuhan yang lebih cepat dibandingkan dengan di Pagirikan. Hasil analisis produktivitas sekunder di Pabean Ilir cenderung lebih tinggi dibandingkan dengan Pagirikan di Pabean Ilir dan Pagirikan sebesar 13,9290 g.m-2.tahun-1 dan 11,8415 g.m-2.tahun-1. Biomassa di Pabean ilir dan Pagirikan adalah 1,08 g.m-2 dan 1,03 g.m-2. Rasio P/B di Pabean Ilir dan Pagirikan sebesar 12,85 dan 11,48. Hasil ini berbeda dengan produktivitas tangkapan. Rata-rata produktivitas tangkapan di Pabean Ilir sebesar 24 g.m- 2.tahun-1, sedangkan di Pagirikan sebesar 47 g.m-2.tahun-1. Hasil tabel sidik ragam (ANOVA) single factor menunjukkan habitat dan lokasi tidak berbeda nyata terhadap hasil tangkapan harian kepiting bakau.
Keyword: Cimanuk delta, growth, mangrove crab, secondary productivity

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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