Judul: Penentuan Dosis Perendaman Hormon Pertumbuhan Rekombinan Ikan Kerapu Kertang pada Pascalarva Udang Galah
Abstrak: This research was conducted to determine the immersion dose of recombinant giant grouper growth hormone (rElGH) that generates high growth performance in giant freshwater prawn. The study was consisted of 5 treatments with three replications. Those were immersion dose of 0.15 mg/L, 1.5 mg/L and 15 mg/L. As control post larval-35 (PL-35) was without treatment (control-1) and PL-35 was immersed in water containing 100 mg/L bovine serum albumin (BSA) without rElGH (control-2). In amount of 30 PL-35 for each treatment were bath immersed for 1 hour in a plastic packing containing 200 mL of water and 100 mg/L BSA. PL were further maintained for 12 weeks in the 30-L glass aquarium and fed flake form of commercial diet 3 times daily, at satiation. The results showed that the highest of biomass (58.77±1.98 gram), specific growth (6.85±0.01 % per day), average body weight (1.09±0.01 gram) and average total body length (5.09±1.01 cm) were obtained in 15 mg/L dose of treatment (p<0.05). Biomass of the prawn in 15 mg/L immersion dose was approximately 79.9% higher than control-1 (32.67±1.45 gram). Survival of prawn in all treatment and controls were similar (p>0.05). The prawn immersed with rElGH at a dose of 15 mg/L had 9.55% lower protein content, while lipid content was 6.33% higher than control. Thus, the immersion of PL in 15 mg/L rElGH could increase the growth of giant freshwater prawn, and can be useful to increase the aquaculture production.
Keyword: biomass, giant freshwater prawn pascalarvae, immersion dose, recombinant growth hormone

Judul: Penentuan Dosis Hormon Pertumbuhan Rekombinan Ikan Kerapu Kertang Pada Larva Ikan Lele Sangkuriang Melalui Perendaman
Abstrak: Growth and survival rate are the main factor determining the productivity of aquaculture. This research was conducted to obtain the dose of recombinant giant grouper growth hormone (rElGH) that generates highest growth and survival rate of Sangkuriang catfish at larval stage through immersion. The research used a completely randomized design and consisted of four treatments with three replications. The dose of rElGH used was 0 (control), 0.2 mg/L, 2.0 mg/L and 20.0 mg/L. rElGH was dissolved in 100 mL water containing 9 g/L salt solution and 100 mg/L bovine serum albumin. A total of 100 larvae at 5 days after hatching were hiperosmotic treated on 35 g/L salt solution for 2 minutes, and then immersed into 100 mL of rElGH solution for 1 hour. Fish were reared for 21 days and fed on blood worm ad libitum. The results showed that biomass and survival rate of 2 mg/L rElGH treated fish was 49.60% and 47.67% higher than control, respectively. Thus, the biomass of Sangkuriang catfish seed can be improved by immersing in water containing 2 mg/L rElGH, and it is potentially high to be used in order to increase aquaculture production.
Keyword: immersion., recombinant growth hormone, larval catfish

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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