Judul: Performa Pertumbuhan dan Daya Tahan Ikan Nila Oreochromis niloticus F1 Hasil Seleksi Berbasis Marka MHC I terhadap Penyakit Streptococcosis
Abstrak: Streptococcosis, caused by the bacteria Streptococcus agalactiae, is a type of diseases that is often found in Nile tilapia farming. MHC I molecules are involved in immune system of vertebrate. This study was performed to evaluate the inheritance of the MHC I marker, the growth response and disease resistance of the first generation of Nile tilapia selected using marker assisted selection method and infected by S. agalactiae bacteria. First generation (F1) were produced by performing crossbreeds, namely: female and male having MHC I, female without MHC I x male having MHC I, female having MHC I x male having MHC I, and female and male without MHC I. MHC I marker inheritance in the progenies were identified, and challenged test was conducted by interperitoneally injecting of 0.1 mL S. agalactiae (107 CFU/mL) for 14 days. The inheritance of MHC I marker in F1 fish was relatively high level, ranging from 78.3-93.0%. Crossbreed of female and male without MHC I has 85.0% survival, highest than other treatments.
Keyword: 

Judul: Aplikasi Berbagai Dosis Bakteri Proteolitik L1k dalam Pakan untuk Pengendalian Streptococcosis pada Ikan Nila Oreochromis niloticus dengan Metode Kohabitasi
Abstrak: Tilapia is a popular freshwater commodity were attacked bacterial disease such as streptococcosis caused by Streptococcus agalactiae. The objective of this research are to assay added treatment of bacterial proteolytic L1k toward increase immune response immune of tilapia (Oreochromis niloticus) infected by Streptococcus agalactiae N14G with cohabitation method. In this study, fish were fed diets containing different doses of proteolytic bacteria of L1k with the doses of 1%, 2% and 3%. Control fish (positive control and a negative control) were not given feed containing probiotic. After that, the fish tested challenged by cohabitation method. Treatment of bacteria proteolytic L1k in different doses of 1%, 2% and 3% can increase the survival rate of tilapia (respectively for 93.33%, 95.56%, and 97.78%) compared with the positive control fish by 68.89%. The addition of bacteria proteolytic L1k as probiotics to the diet may increase the immune response
Keyword: 

Judul: Persamaan Geodesik Black Hole dengan Metrik Kerr 4+1 Dimensi dalam Koordinat Waktu Kosmik
Abstrak: Persamaan geodesik black hole dengan metrik Kerr 4+1 dimensi dalam koordinat waktu kosmik merupakan interpretasi lain dari persamaan geodesik black hole dengan metrik Kerr 4+1 dimensi, dimana acuan waktu yang digunakan diubah dari koordinat waktu wajar (proper time) ke dalam koordinat waktu kosmik (cosmic time). Waktu kosmik merupakan koordinat waktu yang dimana pengamat bergerak mengikuti ekspansi dari alam semesta. Penelitian ini merekonstruksi persamaan geodesik black hole dengan metrik Kerr 4+1 dimensi yang telah ditemukan pada penelitian sebelumnya menjadi persamaan geodesik yang memiliki fungsi terhadap dimensi waktu (t). Hasil akhir dari transformasi persamaan dapat digunakan sebagai bahan studi pustaka untuk penelitian lebih lanjut mengenai persamaan geodesik black hole dalam koordinat waktu kosmik.
Keyword: Dimensi ekstra, Metrik Kerr, Persamaan geodesik, Waktu kosmik