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 Ikan pada Ekosistem Terumbu Buatan di Perairan Pulau Karya dan Pulau Harapan, Kabupaten Administrasi Kepulauan Seribu, DKI Jakarta
Abstrak: Coral reef is the most extensive and highly productive marine ecosystems located in the tropical ocean. The purpose of this study was to examine the structure of reef fish communities in artificial reef in Karya and Harapan Island using parameters, such as reef fish species and family abundance, reef fish trophic level, diversity, eveness, and dominance index. Based on the highest family composition of reef fish in an observation station of Karya and Harapan Island, the most dominating are Pomacentridae (Amblyglyphidodon curacao and Pomacentrus lepydogenis) and Labridae (Cirrhilabrus cyanopleura. Reef fish that are often found trofik level in the artifical reef is herbivorous reef fish 50 % (550 individuals), while reef fish that are often found based on fish group of reef fishes is major reef fish (854 individual). There are no domination by particular species on both stations. High diversity index was present, while both the stations are not significantly different with each other using Hutchinson test, uniformity index is high
Keyword: Bogor Agricultural University (IPB), trophic level, ecology indeks, abundance of reef fish

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: