Judul: Eksplorasi Gen Cytochrome Oxidase Subunit I (COI) dari Kerang Mutiara (Pinctada fucata) yang Berasal dari Lokasi Geografis yang Berbeda
Abstrak: Pinctada fucata is one of the marine bivalves producing pearl which has been utilized and cultured in some countries. These oysters can be found in the Persian Gulf (United of Emirates Arab) and Semau Strait, East Nusa Tenggara (Indonesia). Despite the high potential for the development of P. fucata fishery and culture in Indonesia, the exploration of these oysters has not been conducted. The aim of this research is to explore Cytochrome Oxidase Subunit I (COI) gene sequences of pearl oyster (Pinctada fucata) originating from Persian Gulf (United of Emirates Arab) and Semau Strait, East Nusa Tenggara (Indonesia). The results of the analysis of P. fucata COI gene sequences from both regions shows that there are 33 mutation sites consisting of 16 insertion mutation sites and 17 deletion mutation sites. The difference of P. fucata COI gene sequences from both regions may be a molecular identity that can provide protection of the species and its pearl production. Species authentication of P. fucata may be determined using COI gene sequence in order to prevent illegal trading.
Keyword: Persian Gulf, Pinctada fucata, East Nusa Tenggara, COI gene

Judul: Karakteristik Gen Cytochrome Oxidase Subunit I (COI) pada Kijing Anodonta woodiana (Lea, 1834)
Abstrak: Anodonta woodiana is one of freshwater mussel which have been widely cultivated for its ability to produce pearls. A. woodiana has the ability to produce nacre and prismatic crystal that produce pearls. This ability is closely related to genetic information in this species. The aim of this study was to examine the characteristic of cytochrome oxidase subunit I (COI) gene in freshwater mussel A. woodiana from West Java Province. Genomic DNA was extracted from tissue of A. woodiana from Bogor and Depok. Extracted DNA continued by amplification and sequencing of COI gene. COI gene was aligned with some COI genes from other species, ingroup (familiy Unionidae) and outgroup obtained from GenBank. Amplified of COI gene were successfully yielded in 608 bp. This study was not able to characterize COI gene of A. woodiana well because there are inhibitors. Nucleotid along 608 bp can not be used as a barcode. Phylogenetic analysis of A. woodiana showed that A. woodiana is separated from other family Unionidae.
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Judul: Solusi Geometri Schwarzschild untuk Dimensi 4+1 dengan Invarian Rotasi Isotropik
Abstrak: Metrik Schwarzschild merupakan solusi eksak pertama dari persamaan medan Einstein dengan mangasumsikan metrik statik dan simetris. Metrik Schwarzschild yang ditemukan oleh Karl Schwarzschild masih dalam dimensi 3+1, namun seiring dengan teori-teori terbaru yang menunjukkan bahwa alam semesta tidak hanya di dimensi 3+1. Maka melalui penambahan dimensi, tujuan penelitian ini memperoleh solusi pada geometri Schwarzschild untuk dimensi 4+1 dengan memodifikasi koordinat bola yang invarian rotasi isotropik dan melalui penurunan rumus seperti koordinat bola, simbol Christoffel, dan tensor Ricci. Selain mendapatkan solusi ini, metrik Schwarzschild dimensi 4+1 dapat digunakan sebagai metrik dasar untuk memperoleh solusi blackhole dan wormhole pada dimensi 4+1. Hasil akhirnya, dengan memanfaatkan modifikasi koordinat bola, metrik Schwarzschild dapat dibentuk sehingga diperoleh solusi geometri Schwarzschild untuk dimensi 4+1.
Keyword: metrik Schwarzschild, persamaan medan Einstein, modifikasi koordinat bola, penambahan dimensi, invarian rotasi isotropik