Judul: Analysis of Abundance and Characteristics of Microplastic in the Gastrointestinal Tract of Sandfish (Holothuria scabra) cultured in Pasar Island, Bandar Lampung
Abstrak: Pulau Pasaran merupakan pulau yang berlokasi di Provinsi Lampung, terletak di Kecamatan Teluk Betung Timur, Kota Bandar Lampung. Perairan Pulau Pasaran berpotensi tercemar oleh mikroplastik karena adanya aktivitas masyarakat dan kegiatan perikanan yang tinggi. Salah satu kegiatan perikanan di Pulau Pasaraan yaitu budidaya teripang pasir. Penelitian ini bertujuan untuk mengidentifikasi kelimpahan mikroplastik dan karakteristiknya berdasarkan bentuk, warna, dan ukuran pada saluran pencernaan teripang pasir (Holothuria scabra) budidaya di Pulau Pasaran, Bandar Lampung. Karakteristik mikroplastik yang diamati yaitu bentuk, warna, dan ukuran. Uji statistik yang digunakan yaitu Kruskall-Wallis, dan dilanjutkan dengan Mann Whitney apabila terdapat perbedaan nyata. Kelimpahan mikroplastik rata-rata pada penelitian 57.42±50.61 partikel/individu. Karakteristik bentuk pada saluran pencernaan teripang pasir didominasi oleh bentuk fiber. Warna mikroplastik yang ditemukan didominasi oleh warna hitam. Ukuran mikroplastik didominasi oleh ukuran 300-500 µm. Tipe polimer yang ditemukan setelah dilakukan uji FT-IR spectroscopy yaitu polyvinyl chloride (PVC), polyprolylene (PP), polystyrene (PS), dan polyethylene (PE)., Pasaran Island is located in Lampung Province, located in Teluk Betung Timur District, Bandar Lampung City. Pasaran Island is considered polluted by microplastics due to high community and fishery activities. One of the fisheries activities on Pasaran Island is the cultivation of sandfish. The purpose of this study was to identify the abundance of microplastics and their characteristics based on the shape, size, and color of the gastrointestinal tract of sandfish (Holothuria scabra) cultured in Pasaran Island, Bandar Lampung. The microplastic characteristics observed were shape, color and size. The statistical test used was Kruskall-Wallis, and continued with Mann Whitney if there was a significant difference. The average microplastic abundance in the study was 57.42±50.61 particles/individual. The most dominant microplastic characteristic found in the gastrointestinal tract of aquaculture sandfish is fiber. Dominant microplastic color that is black color. Size of the microplastics was dominated by the size of 300-500 µm. The types polymers found after FT-IR spectroscopy are polyvinyl chloride (PVC), polyprolylene (PP), polystyrene (PS), dan polyethylene (PE).
Keyword: abundance of microplastics, microplastics, sand fish (Holothuria scabra)

Judul: Kandungan Logam Berat Merkuri (Hg) dan Kadmium (Cd) pada Air, Sedimen, dan Teripang Pasir (Holothuria scabra) Budidaya di Pulau Pasaran, Bandar Lampung
Abstrak: Pulau Pasaran merupakan salah satu pulau di Kelurahan Kota Karang. Kecamatan Teluk Betung Timur, Bandar Lampung. Salah satu komoditasnya yaitu teripang pasir (Holothuria scabra). Penelitian ini bertujuan untuk mendeskripsikan pencemaran logam berat merkuri (Hg) dan kadmium (Cd) pada air, sedimen dan teripang pasir (Holothuria scabra) budidaya di Pulau Pasaran, Bandar Lampung. Kandungan logam berat diukur dengan menggunakan AAS (Atomic Absorption Spectrophotometer). Kandungan logam berat Hg di air, sedimen dan daging teripang pasir sebesar 0,004-0,009; 0,006-0,015; dan 0,01-0,033 ppm. Kandungan logam berat Cd di air, sedimen dan daging teripang pasir sebesar <0,001; <0,005-0,006; dan 0,046-0,109 ppm. Perairan tambak budidaya teripang pasir Pulau Pasaran telah tercemar logam berat Hg. Tidak ada indikasi pencemaran logam berat Hg dan Cd pada sedimen. Konsentrasi logam berat Cd yang terdeteksi pada daging teripang pasir telah melebihi baku mutu. Kata kunci: logam berat, Pulau Pasaran, teripang pasir
Keyword: heavy metals, Pasaran Island, sandfish

Judul: Penyusunan Overlap Graph menggunakan Suffix Tree pada DNA Sequence
Abstrak: The DNA sequence assembly is very important in genome analysis. This step aims to reconstruct contigous DNA fragment (contigs) from short fragment by concatenating fragments based on the overlap region among them. This method employs overlap graph for solving the problems. In this graph, nodes represent fragments and edges represent overlap. This research developed a software for constructing overlap graph using suffix tree. The evaluation was conducted by measuring the number of nodes, number of edges, and the execution time in many values of minimum overlap. The minimum overlap is defined as the minimum length of substring which is considered as the overlap region between two fragments. The evaluation results showed that the number of nodes, the number of edges, and the execution time were increased with the decreasing of the minimum overlap value.
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