Judul: Struktur Populasi Udang Penaeid dan Keterkaitannya dengan Mangrove Tambak di Desa Jayamukti Kabupaten Subang
Abstrak: Kabupaten Subang memiliki mangrove sebagai habitat biota ekonomis penting, seperti udang penaeid. Penelitian ini bertujuan mengidentifikasi struktur populasi udang, mangrove tambak Desa Jayamukti-Subang, serta keterkaitan antara struktur mangrove dengan udang. Pengamatan mangrove dan sampling udang penaeid dilakukan di enam stasiun, dengan metode transek garis yang di dalamnya ada 3 petak contoh serta pengumpulan sampel udang penaeid dengan bubu. Parameter lingkungan yang diamati adalah suhu, salinitas, pH, DO, jenis dan kerapatan mangrove. Ada dua jenis mangrove dan tiga jenis udang yang ditemukan, dengan genus Metapenaeus lebih dominan. Ada korelasi erat untuk antara panjang karapas dengan berat udang, yang bersifat allometrik negatif. Penelitian ini mendapati bahwa kerapatan mangrove berkontribusi sebanyak 66% terhadap rata-rata ukuran panjang karapas udang, khususnya jenis Metapenaeus monoceros.
Keyword: Mangrove, Metapenaeus monoceros, Penaeus merguiensis, pond, Metapenaeus tenuipes

Judul: Kondisi Mangrove dan Struktur Komunitas Udang (Studi Kasus di Kecamatan Pasekan, Indramayu)
Abstrak: Mangrove is one of a group of plants in the tidal area. This study aims to describe community structure of shrimp with relation to mangroves. Research analyzed were species of shrimps in three different sub-habitats are ponds, river, and beaches in the Pabean Ilir and Pagirikan villages, Indramayu. Conditions measurzed include vast, density, and basal cover of mangroves and water quality. The results showed that the extent and mangrove density in the Pagirikan village lower than Pabean Ilir village. Environmental conditions in the two observation stations showed the results do not significant different and still in the range for survival of shrimp. There are eight species of shrimp during the observation, namely Penaeus merguiensis, P. japonicus, P. monodon, Acetes sp., Metapenaeus ensis, M. monoceros, Harphiosquilla raphidae, and M. rosenbergii. Diversity shrimps in the Pabean Ilir slightly higher than Pagirikan, however not significant. Community structure differences found between sub-habitat of ponds, river, and beaches from each of the two observation sites.
Keyword: Shrimp., P. merguiensis, Mangrove, Diversity, Indramayu

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4