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: Community Structure and Distribution of Macrozoobenthos in Bojonegara Coastal Waters, Banten Bay, Indonesia
Abstrak: Penelitian ini bertujuan untuk mengetahui struktur komunitas dan distribusi makrozoobentos di perairan pantai Bojonegara, Teluk Banten. Penelitian ini dilaksanakan selama lima bulan pada bulan Januari, Februari, Agustus, September dan Oktober 2020 di enam titik stasiun. Pengambilan sampel makrozoobentos dilakukan menggunakan Van Veen Grab, sedangkan pengambilan data parameter fisik kimia perairan dilakukan secara in-situ dan eks- situ. Struktur komunitas makrozoobentos didapatkan melalui analisis kepadatan, komposisi jenis, indeks keanekaragaman, indeks keseragaman dan indeks dominansi. Hubungan makrozoobentos dengan lingkungan dianalisis menggunakan PCA dan indeks similaritas. Makrozoobentos yang diperoleh selama penelitian terdiri dari 6 filum (Moluska, Annelida, Arthropoda, Echinodermata, Nematoda, dan Sipuncula), 8 kelas dan 77 genera, di antaranya Bivalvia (18) , Gastropoda (37), Polychaeta (12), Malacostraca (4), Echinoidea (2), dan masing- masing 1 genera untuk Chromadorea, Scapopoda, dan Sipunculidea. Kelas Bivalvia dan Gastropoda merupakan jenis makrozoobentos yang ditemukan di seluruh stasiun. Analisis Komponen Utama (PCA) menunjukkan adanya korelasi positif antara Bivalvia, Gastropoda, Sipunculidea dengan parameter kecerahan dan salinitas. Echinoidea dan Scapopoda dipengaruhi oleh parameter suhu, sedangkan Polychaeta, Malacostraca dan Chromadorea dipengaruhi oleh parameter pH., The study aims to determine the community structure and distribution of macrozoobenthos in the coastal waters of Bojonegara, Banten Bay. The study was conducted for five months in January, February, August, September and October 2020 on six stations. Macrozoobenthos sampling was carried out using Van Veen Grab, while the physical and chemical parameters of the waters were observed in situ and ex-situ. The community structure of macrozoobenthos was obtained by analyzing the density, species composition, diversity index, evenness index and dominance index. The relationship of macrozoobenthos with the environment was analyzed using PCA and the similarity index. The results of the study showing that there were 6 phyla belong to macrozoobenthos (Molluscs, Annelids, Arthropods, Echinoderms, Nematodes, and Sipuncula), 8 classes and 77 genera, namely; Bivalvia (18), Gastropoda (37), Polychaeta (12), Malacostraca (4), Echinoidea (2), and respectively 1 genus for Chromadorea, Scapopoda, and Sipunculidea. The class of Bivalvia and Gastropoda were types of macrozoobenthos that mostly found at all stations. Principal Component Analysis (PCA) showed a positive correlation between Bivalves, Gastropods, Sipunculidea with transparency and salinity parameters. Echinoidea and Scapopoda were influenced by temperature parameters, while, Polychaeta, Malacostraca and Chromadorea were influenced by pH parameters.
Keyword: Banten Bay, community structure, macrozoobenthos, PCA, Banten Bay, community structure, macrozoobenthos, PCA

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