Judul: Community Structure of Bivalve in Coastal Area of Panjang Island and Tarahan Island, Banten and Variation of Shell’s size measure.
Abstrak: Coastal areas of Panjang island and Tarahan island has variety of substrates such as sand, and coral reef. This made possible the existence of bivalve community in this areas. The research was purposed to know the community structure of bivalves in the areas and the variation of shell size. This research had been done in May 2008 until September 2008. Samples of bivalve were taken by using randomly kuadrant transect method. The diversity index are ranged from 0.45 to 1.59, evenness index are ranged from 0.10 to 0.48, dominant index are ranged from 0.24 to 0.78, and similarity index are ranged from 0.18 to 0.50. Gafrarium divaricatum has obesity value (%Obesity) are ranged from 43.60% to 66.28%, while the relative height are ranged from 80.66% to 93.49%. Perna viridis has obesity value (%Obesity) are ranged from 19.09% to 38.67%, while the relative height are ranged from 38.17% to 71.60%. Keyword: Community structure, Bivalve, Variation of shell size
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Judul: Diversity of Molluscs (Bivalve and Gastropod) in Carita Beach, Pandeglang, Banten.
Abstrak: Carita beach is one of a beach ecosystem that has variety of substrates. Substrates were dominated by sand and corral reef flat. There were vegetations such as seagrass and seaweed. The aim of the research was to know species richness and diversity of Bilvave and Gastropod in Carita beach, Pandeglang, Banten. The research was conducted on May 2008. Molluscs sample were collected from 4 stations randomly by using quadrat method. There were 34 species molluscs that had been observed, 3 species belong to Bivalves and 31 species belong to Gastropods. The highest Important Value Index (IVI) of all station was found in Donax cuneatus with 55.21%. The lowest IVI was found in thirteen species of Bivalve and Gastropod with 0.83%. The diversity index (H’) ranged from 0.130 to 2.216, the evenness index (E) was 0.072 to 0.717, and the dominant index (C) was 0.198 to 0.960. The highest diversity index (2.216) was found at station 4 and the lowest (0.130) was at station 1. The similarity index ranged from 0 to 0.744. Key word : diversity, quadrat method, Carita beach
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Judul: Katalis Zink Ferit Tersubstitusi Cu untuk Oksidasi Benzil Alkohol
Abstrak: Katalis berperan dalam menurunkan energi aktivasi. Katalis ZnFe2O4 dan ZnFe2O4 tersubstitusi Cu disintesis menggunakan metode kopresipitasi untuk digunakan dalam oksidasi benzil alkohol. Katalis dicirikan dengan spektrofotometer inframerah (FTIR) dan difraktometer sinar-X. Spektrum FTIR menunjukkan puncak serapan dari ikatan Zn-O dan Fe-O masing-masing pada rentang 559‒575 cm-1 dan 419‒447 cm-1. Difraktogram menunjukkan terbentuknya fase tunggal Zn0.6Cu0.4Fe2O4 pada katalis ZnFe2O4 tersubstitusi Cu 20%. Benzil alkohol dioksidasi dengan sistem refluks. Konversi benzil alkohol meningkat dengan meningkatnya suhu. Kadar benzaldehida yang dihasilkan dengan katalis ZnFe2O4 tersubstitusi Cu 20% lebih tinggi dibandingkan dengan katalis ZnFe2O4 yang tidak tersubstitusi dan yang tersubstitusi Cu 60 dan 80%. Hal tersebut menunjukkan bahwa katalis ZnFe2O4 tersubstitusi Cu 20% memiliki kinerja yang lebih baik dalam oksidasi benzil alkohol menjadi benzaldehida dengan kadar benzaldehida 8.763%.
Keyword: Benzil alkohol, katalis, oksidasi, ZnFe2O4