Judul: Struktur Komunitas Ikan di Lokasi Transplantasi Karang Perairan Pulau Pramuka dan Sekitarnya.
Abstrak: Reef fish is an organism that has the greatest individu number in the coral. The purpose of this study was to assess the type and abundance of reef fish and the value of diversity index, uniformity and dominance in the area of cultivation of coral transplantation in Pramuka Island and the surrounding waters. Observations reef fish and water samples were taken from the transplant area of 5 stations in March 2015. Reef fish are found in both the transplant area totaling 1126 individuals. Families are found in both the transplant area numbered 16 families and consists of 51 species. The average value of the index of diversity at observation area in the medium category. The average value of the index uniformity at observation area was include in the category of high uniformity and stable community. The average value dominance index was calculate at observation area are in the low category dominance.
Keyword: Fish, Coral Transplantation, Pramuka Island

Judul: Struktur Komunitas Echinodermata di Lokasi Transplantasi di Perairan Pulau Pramuka dan Sekitarnya
Abstrak: Echinodermata yang hidup pada lokasi transplantasi memiliki peranan penting dalam berbagai proses ekologis terumbu karang. Penelitian ini bertujuan untuk mengkaji struktur komunitas dan sebaran jenis dari filum Echinodermata di beberapa lokasi transplantasi terumbu karang Pulau Pramuka, Kepulauan Seribu. Pengambilan data dilakukan dengan menggunakan metode belt transect (20x4) m. Berdasarkan hasil penelitian, echinodermata yang ditemukan pada lokasi transplantasi terdiri dari 3 kelas, 4 ordo, 9 famili, 13 genus dan 14 spesies. Echinodermata yang paling banyak ditemukan adalah jenis Diadema setosum (Kelas. Echinoidea). Secara umum, kualitas perairan Pulau Pramuka dalam keadaan baik untuk menunjang kehidupan terumbu karang dan echinodermata. Karakteristik habitat akan mempengaruhi keberadaan jenis echinoderamata yang hidup di ekosistem terumbu karang. Indeks keanekaragaman echinodermata pada kelima stasiun penelitian dikategorikan rendah karena nilai H' yang diperoleh hanya berkisar antara 0.58 sampai 0.81. Indeks keseragaman echinodermata pada stasiun 1 dikategorikan sedang karena nilai E yang diperoleh sebesar 0.64 dimana komunitas dalam keadaan labil, sedangkan pada stasiun 2, 3, 4 dan 5 dikategorikan tinggi dengan nilai E berturut-turut sebesar 0.86; 0.85; 0.78 dan 0.77 dimana komunitas dalam keadaan stabil. Indeks dominansi echinodermata pada kelíma stasiun penelitian dikategorikan rendah karena nilai C yang diperoleh hanya berkisar antara 0.18 sampai 0.33.
Keyword: Community structure, Echinoderms, Coral transplantation, Pramuka Island, Coral reeft, Belt transect method, Diadema setosim, Echinoidea class, Water quality

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.
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