Judul: Sintesis Hidrotermal dan Karakterisasi Kristal Titanium Dioksida (TiO2)
Abstrak: The aim of this research is studied about methode and temperature effect to phase and size of titanium dioxide (TiO2) crystal. Titanium dioxide (TiO2) crystal was synthesized by hydrothermal method with mixed of TiO2 powder (Rutile, Merck) and strong of natrium hidroxide (NaOH) in hydrothermal container at 180 °C for 48 h. After synthesized, one sample made without calcination (a) and two samples other were calcinated at 500 °C (b) and 800 °C for 2 h (c). The morphologies of crystals were analyzed using X-ray diffraction and Scanning Electron Microscopy (SEM). Crystal without calcination (a) was obtained with avarage size crystal about 0,147 nm and cristalinity was resulted about 37,84 %, this crystal was amorphous thus hadn’t formed into anatase or rutil phase yet. In second treatment (b), crystal was obtained with average size about 34,507 nm, crystal was formed into anatase phase and it had crystalinity about 70,38 %. In third treatment (c), crystal was more homogen with average size about 45,168 nm and crystalinity was resulted about 90,47 %. Crystal (c) was becomes unstable and transformed from anatase into rutile phase
Keyword: 

Judul: Sintesis dan Pencirian Natrium Titanat (Na2Ti2O4(OH)2) Berbahan Dasar Titanium Dioksida
Abstrak: TiO2 can be utilized as basic material for synthesis of sodium titanate (Na2Ti2O4(OH)2). This research was purposed to synthesize and characterize sodium titanate from TiO2 rutile powder as a basic material. Sodium titanate was synthesized by hydrothermal process at temperature 130 °C by mixing TiO2 rutile powder with 5 M and 10 M NaOH solution, then each was calcinated at temperature 700 °C. The energy dispersive X-ray analysis showed that sodium titanate has been successfully synthesized. This result was also supported by functional group analysis with Fourier transform infrared (FTIR) spectrofotometer showing the existence of Ti-O-Na vibration band at 989.42 cm-1. The formation of sodium titanate was depend on the reaction condition such as temperature, reaction time, and NaOH concentration. Scanning electron microscope image indicated that sodium titanate synthesized at 130 °C in 20 hours reaction time with 10 M NaOH had crystal size of 99.37 nm.
Keyword: 

Judul: Studi Pelelangan Bandeng di Kabupaten Pangkajene dan Kepulauan, Provinsi Sulawesi Selatan
Abstrak: Pelelangan Bandeng di Kabupaten Pangkajene dan Kepulauan (Pangkep) didirikan tahun 1960. Objek lelang berupa bandeng yang berukuran 3 jari (0,22 kg/ekor). Total bandeng pada bulan Juli 2007 sekitar 976 ton/bulan. Harga bandeng di pelelangan sekitar Rp 8856,03/kg. Pelaksanaan lelang dimulai pukul 21:00-03:00 WITA. Pengelolaan pelelangan dilaksanakan oleh Pemerintah Daerah melalui Dinas Pendapatan Daerah Kabupaten Pangkep beserta beberapa pihak diantaranya petambak, pungawa, pacatto, pagandeng, dan penagih retribusi. Saluran pemasaran bandeng di pasar lokal diantaranya Petambak- Pelelangan-Pacatto (S1), Petambak-Pelelangan-Pacatto-Pengecer Pasar (S2), Petambak-Pelelangan-Pacatto-Pagandeng Sepeda (S3), Petambak-Pelelangan- Pacatto-Pagandeng Motor (S4). Saluran pemasaran S1 memiliki nilai margin dan biaya pemasaran terkecil sebesar Rp 3.304,53/kg dan Rp 2.540,38/kg, serta memiliki nilai indeks efisiensi terkecil yaitu 34,45 %. Penarikan retribusi diatur Perda No.22 Tahun 2000 tentang Perubahan Pertama Perda No.4 Tahun 1999 tentang Retribusi Pasar Grosir atau Pertokoan. Mekanisme pelelangan yang terjadi yaitu kegiatan pra lelang, kegiatan lelang, kegiatan pasca lelang dan beberapa kegiatan penunjang pelelangan. Realisasi penerimaan retribusi terhadap target tahun 2006 sebesar 72,39 %. Kontribusi retribusi pelelangan terhadap retribusi pasar grosir pada tahun 2006 sebesar 71,03% . Kontribusi retribusi pelelangan terhadap Pendapatan Asli Daerah (PAD) tahun 2006 sebesar 0,2 %. Hasil analisis Internal Factor Evaluation (IFE) diketahui bahwa pelelangan bandeng pangkep memiliki 7 faktor strategis internal. Skor IFE yang diperoleh senilai 2,83. Bandeng Pangkep memenuhi kriteria bandeng berkualitas salah satu faktor kekuatan yang memiliki skor tertinggi senilai 0,80. Hasil analisis Eksternal Factor Evaluation (EFE) diketahui bahwa pelelangan bandeng pangkep memiliki 7 faktor strategis eksternal. Kecenderungan masyarakat Sulawesi yang menyukai ikan merupakan salah satu faktor peluang yang memiliki skor tertinggi senilai 0,72. Skor EFE yang diperoleh senilai 3,17 menunjukan bahwa pelelangan bandeng berada di atas rata-rata (2,50) dalam kekuatan eksternal. Ini berarti posisi eksternal pelelangan bandeng cukup kuat. Pelelangan bandeng telah mampu memanfaatkan peluang maupun ancaman yang terdapat di pelelangan bandeng. Kata Kunci : pelelangan, bandeng, Pangkep, margin, efisiensi, retribusi dan faktor strategis
Keyword: