Judul: Keanekaragaman dan Komposisi Species Semut (Hymenoptera: Formicidae) pada Vegetasi Mangrove Kabupaten Kolaka, Sulawesi Tenggara dan Muara Angke, Jakarta:
Abstrak: Salah satu kelompok fauna yang memiliki kelimpahan tertinggi pada filum Arthropoda adalah kelompok serangga. Serangga merupakan fauna avertebrata yang memiliki peranan penting dalam berbagai ekosistem. Salah satu kelompok serangga yang memiliki peranan ekologi yang sangat penting adalah semut (Hymenoptera: Formicidae). Semut merupakan serangga eusosial yang penyebarannya sangat luas dan dapat ditemukan pada berbagai habitat mulai hutan tropis, padang rumput dan beberapa habitat lainnya. Semut memiliki keanekaragaman yang tinggi dan memiliki kemampuan adaptasi sehingga keberadaannya dapat ditemukan disemua habitat . Selain pada daerah teresterial semut juga dapat ditemukan di daerah pesisir pantai karena terdapat habitat yang memungkinkan keberadaan semut yaitu vegetasi mangrove antara lain Sonnerafia, Rhizophora dan Bruguiera. Kabupaten Kolaka dan Muara Angke adalah sebagian dari daerah pesisir pantai di Indonesia yang memiliki vegetasi mangrove. Kedua wilayah tersebut diduga memiliki keragaman semut yang cukup tinggi dan berbeda. Perbedaan yang terjadi disebabkan kondisi habitat dan faktor lingkungan. Oleh karena itu kedua daerah tersebut dijadikan lokasi penelitian. Pada vegetasi mangrove Kabupaten Kolaka lokasi pengambilan semut dilakukan pada tiga stasiun yaitu pada stasiun Latambaga, Samaturu dan Wolo, sedangkan pada vegetasi mangrove Muara Angke dilakukan pada satu stasiun yaitu pada kawasan Suaka Margasatwa Muara Angke (SMMA).
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Judul: Keanekaragaman Serangga di Ekosistem Mangrove: Studi Kasus Hutan Mangrove di Kawasan Pesisir Angke Kapuk, Jakarta Utara
Abstrak: Mangrove is the habitat of various insects which have important function of ecosystem. However, many insect species and their functions in mangrove ecosystem have not been identified yet. This research is aimed to elucidate the species composition of mangrove in relation to the species diversity of insect. This research was conducted in three different mangrove stand in Mangrove Protection Forest of Angke Kapuk and Soedyatmo highway mangrove area. They are monoculture stand of A. marina, mixed stand of A. Marina and R. mucronata, and mixed stand of S. alba and R. mucronata. Sampling was collected by using line quadrat method. There were eight quadrats (10 m × 10 m) suspended at every mangrove stand. Incest traping was using yellow-pan trap method. The result indicates that the mixed stand A. Marina and R. mucronata has the highest value of insects abundance. The dominant insect at every mangrove stand were order of Diptera.
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Judul: Pemurnian dan karakterisasi protein inhibitor RNA helikase virus hepatitis C
Abstrak: Hepatitis C virus (HCV) infection is the second most common chronic viral infection in the world with global prevalence. This infection is contribution to chronic hepatitis and liver cirrhosis, often leading to hepatocellular carcinoma. There is no effective drug and vaccine available against HCV. The current standard treatment, a combination of pegylated interferon-α with ribavirin, is limited by its suboptimal response rate in a significant patient population, side effects, and affordability. Therefore, development of effective drug is needed. One approach to find out the candidate of antiviral drug is to discover the inhibitor of enzyme that essential for virus replication, such as RNA helicase. Streptomyces chartreusis 5-095 produce the inhibitor of HCV RNA helicase. The aim of this study was to purify the protein inhibitor which has inhibition activity against ATPase activity of RNA helicase HCV from S. chartreusis 5-095. The supernatant of culture S. chartreusis 5-095 exhibited high inhibiton activity against ATPase activity of RNA helicase HCV (approximately 72%) at 10 days of incubation. The extracellular protein inhibitor was partially purified by procedures of precipitation with ammonium sulfate to 65% saturation and gel filtration (Sephadex G50) using methanol water solution (4:6) as an eluen. The purity of protein inhibitor was monitored by SDS PAGE. The protein inhibitor showed a relative molecular mass were estimated to be 14 kDa and increased the purity 23,08 fold than those of the crude protein. The specific activity and IC50 after purification were 13,1338 U/mg and 0,0767 mg/mL, respectively. The activity of purified protein inhibitor showed its stability over pH range from 5-8 and optimum at pH 7,4. The inhibition activity showed its stability up to 70% at temperature 100 oC. The purified protein inhibitor relatively stable its activity at storage in the range of -20 oC to room temperature for 35 days.
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