Judul: Biodiversitas, Karakter Morfologis dan Aspek Reproduksi Jenis Ikan Khas Perairan Mangrove di Suaka Margasatwa Muara Angke, Penjaringan Jakarta Utara
Abstrak: The research was conducted in Muara Angke Wildlife Conservation, Penjaringan, North Jakarta. The aim of this study was to determine fish diversity in mangrove ecosystem, morphological character, and reproduction aspect (P. schlosseri, A. Gymnocephalus, and L. subviridis). Furthermore, those were compared with the same fish species in Ujung Kulon National Park. The result showed that there were 32 spesies belongs to 29 genera and 24 families were found in Muara Angke Wildlife Conservation. Based on PCA analysis, P. schlosseri has variance that can be explained 45.5%, L. subviridis 59.8%, and A. gymnocephalus 64.5%. The highest fluctuating asymmetry character is located in gill rakers. P. schlosseri supposedly better able to adapt to the pattern in the SMMA positive allometric growth (b> 3). Fecundity of this three species is vary and depend on environmental factors.
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Judul: Komposisi Jenis dan Struktur Vegetasi Hutan Mangrove di Suaka Margasatwa Muara Angke, Jakarta Utara
Abstrak: Hutan mangrove Suaka Margasatwa Muara Angke (SMMA) merupakan kawasan penyangga kehidupan di DKI Jakarta yang memerlukan penjagaan dari kerusakan. Informasi struktur dan komposisi jenis hutan mangrove dapat membantu pengelolaan berkelanjutan. Penelitian ini bertujuan mempelajari komposisi jenis dan struktur vegetasi hutan mangrove di SMMA. Analisis vegetasi dilakukan menggunakan metode grid dengan luasan yang diamati seluas 6.800 m2 berjumlah 17 petak dengan ukuran setiap petak 20 x 20 m. Penelitian ini menunjukkan bahwa hutan mangrove SMMA memiliki 26 jenis tumbuhan penyusun dari 21 famili. Jenis Sonneratia caseolaris dan Rhizophora mucronata mendominasi pada pohon dan permudaannya, Brachiaria mutica pada tumbuhan bawah, serta Nypa fruticans mendominasi palem-paleman. Nilai keanekaragaman dan indeks kekayaan jenis hutan mangrove SMMA tergolong rendah. Indeks dominansi hutan mangrove SMMA pada pohon dan palem tergolong tinggi, semai dan tumbuhan bawah tergolong sedang, dan pancang tergolong rendah, sedangkan kemerataan jenis pada pohon, pancang, dan tumbuhan bawah tergolong sedang, dan semai dan palem-paleman tergolong rendah. Struktur horizontal hutan mangrove membentuk kurva J terbalik, sedangkan struktur vertikal membentuk lapisan stratum C dan stratum D., Muara Angke Wildlife Reserve (SMMA) mangrove forest is the buffer zones for DKI Jakarta which requires protection from damage. Information of mangrove forest structure and species composition can assist sustainable management. This study aims to study species composition and vegetation structure of SMMA mangrove forest. Vegetation analysis was carried out by the grid method with an observed area of 6.800 m2 totaled 17 plots with a size of each quadrat 20 x 20 m. This study shows that the results of SMMA mangrove forest has 26 species from 21 families. Species Sonneratia caseolaris and Rhizophora mucronata dominate the level of trees and the regeneration, Brachiaria mutica of undergrowth, with Nypa fruticans dominate palms. The diversity and species richness index of SMMA mangrove forest was low. The dominance index on trees and palms were high, while seedlings and undergrowth were moderate, and on saplings were low, while the species evenness index on trees, saplings, and undergrowth was moderate, and for seedlings and palms low. For the horizontal structure of mangrove forest forms an inverted J-curve, while the vertical structure forms stratum C and stratum D.
Keyword: analisis vegetasi, hutan mangrove, Suaka Margasatwa Muara Angke

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition