Judul: Karakteristik Gen Cytochrome Oxidase Subunit I (COI) pada Ulat Sutera Liar (Attacus atlas L.) asal Jawa Barat
Abstrak: Attacus atlas is a silkworm of Indonesia, distributing from Nangroe Aceh Darusalam (NAD) to West Papua. Based on genetic databases from GenBank, there is no genome complete data of this species, especially Indonesian origin. This study was aimed to characterize A. atlas COI gene originated from West Java Province. Genomic DNA was extracted from the tissue of A. atlas larvae from Bogor and Purwakarta. DNA extraction were then followed with DNA amplification and sequencing of COI gene. A. atlas COI gene were aligned along with other spesies COI gene to compare nucleotide sequences of COI gene. COI gene sequence data of the others were acquired from GenBank. Cricula trifenestrata, Antheraea pernyi, Bombyx mori, and Bombyx mandarina were among species included in the alignment. Six samples were amplified and the amplification product was 595 nt, which was then analyzed with MEGA 4.0 software. This study was able to characterize A. atlas COI gene and product was 508 nt. Nucleotide sequences of the gene was monomorfic and conserved in the species level. There are 31 diagnostic nucleotide sites characterizing A. atlas. Group separation was distinct between the member of Saturniidae family (A. atlas, C. trifenestrata, and A. pernyi) with the member of Bombycidae family (B. mori and B. mandarina). Phylogenetic analysis of A. atlas showed that A. atlas possesses separate nodes, while the position of C. trifenestrata closes to A. pernyi
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Judul: Karakteristik Gen Cytochrome Oxidase Subunit I (COI) pada Kerang Bulu (Anadara antiquata Linn.) asal Perairan Panimbang dan Bojonegara, Provinsi Banten
Abstrak: Anadara antiquata is an intertidal bivalve belongs to Arcidae Family. Its distribution in Indonesia is widespread. Its play role both in economy and ecology. Based on genetic database from GenBank, there is no genome data of A. antiquata from Indonesia. Therefore, to accomplish information on this hairy cockle, this research was aimed at characterizing cytochrome oxidase subunit I (COI) in cockle (Anadara antiquata linn.) from Banten (Panimbang and Bojonegara). Hairy cockle samples were collected from Panimbang and Bojonegara. Those were extracted for DNA analysis. DNA extraction and amplification process were followed with DNA sequencing of COI gene that produced 607 nucleotides (nt). The product was analyzed using software MEGA 4.0 and aligned with some sequences from GenBank database. This study was able to characterize A. antiquata COI gene which product was 382 nt using alignment method of Clustal W.
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Judul: Masalah Persediaan Produk yang Mudah Rusak dengan Mempertimbangkan Inflasi dan Diskon, Studi Kasus: Akhir Periode Diskon Bertepatan dengan Waktu Pembelian
Abstrak: Persediaan merupakan salah satu aset termahal dari banyak perusahaan. Persediaan pada kenyataannya membutuhkan perawatan tertentu, tempat penyimpanan, dan dapat mengalami kerusakan seiring dengan lama waktu penyimpanan, sehingga persediaan tidak dapat disimpan dalam jangka waktu yang lama. Tujuan dari pengelolaan persediaan adalah menjaga ketersediaan produk agar bisa memenuhi kebutuhan pelanggan dan efektivitas biaya. Perusahaan mengelola persediaan untuk menjaga kebutuhan pelanggan dalam jangka panjang, dan untuk melindungi pasar terhadap beberapa produk maupun pesaing. Dalam karya ilmiah ini, dibahas model Economic Order Quantity dengan tingkat kerusakan konstan dan diskon untuk kasus periode diskon berakhir saat waktu pemesanan regular tiba. Penelitian ini menghasilkan formulasi masalah persediaan untuk menentukan kuantitas pesanan dengan diskon dan periode pengisian ulang dengan diskon sehingga memaksimumkan penghematan biaya total. Selain itu, dihasilkan pula rumusan pengaruh tingkat kerusakan, diskon, dan tingkat suku bunga terhadap periode pengisian ulang dan penghematan biaya total.
Keyword: diskon, nilai sekarang, persediaan