Judul: Pertumbuhan dan kelangsungan hidup benih ikan gurame yang diberi pakan alami yang disuplementasi hormon pertumbuhan rekombinan
Abstrak: The study was conducted to determine the effectiveness of feeding Artemia nauplii and silk worm supplemented with recombinant growth hormone (rHP) on giant gourami fry to increase its growth. This study consisted of four treatments with two replications. The treatments were (A) Artemia enriched with rHP and silk worm without rHP supplementation, (B) Artemia enriched with rHP and silk worms with not lisated bacteria producing rHP, (C) Artemia enriched with rHP and silk worm with lisated bacteria producing rHP, and ( D) control without rHP enrichment. Giant gourami larvae used was two-day-old after yolk egg absorbed and in amount of 50 fish for each replication. Artemia nauplii of 202 mg wet weight were immersed into 200 ml of rHP solution for 30 minutes, and then it divided equally into each aquarium. Feeding fish on rHP-enriched Artemia nauplii was once a day for one week of rearing. Two gram of silk worms were mixed with rHP and allowed for 15 minutes. Feeding fish on rHP-enriched silk was once a day for 2 weeks of rearing. Fish were raised for 8 weeks and fed on live food ad libithum. The results showed that absolute and specific growth rate of treatments and control was similar (P>0.05). Fish biomass in Treatment A (192.31 g) was relatively higher compared to other treatments (172.88 and 173.95 g) and control (170.50 g). Survival rate of fish in treatment A (99%) and control (100%) was higher (P<0.05) compared to treatment C (91%) and B (89%). Thus, Artemia nauplii could be used to deliver rHP in order to increase growth of giant gourami fry.
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Judul: Pertumbuhan dan kelangsungan hidup benih Ikan Gurame yang diberi protein rekombinan GH melalui perendaman dengan dosis berbeda
Abstrak: This research was conducted to determine the dose of rGH giant gouramy (r- OgGH) given through immersion that generate the highest growth of gouramy juvenile. The dose of rGH used was 10 mg / l, 20 mg / l, and 30 mg / l and without administration of rGH as a control. Fifty fries of 2 days after the yolk egg absorbtion were immersed into 200 ml of rGH solution for 60 min. Immersion was performed 3 times and applied once a week. The fish were reared in aquaria at stocking densities of 7 fish/l for 5 weeks and fed on Artemia nauplii and blood worm 2 times a day ad libitum. The results showed that the average body weight of 30 mg/l (0.3394 g) and 20 mg/l (0.3179 g) rGH-treated fish were higher (P<0.05) compared to that of 10 mg/l (0.2423 g) and control (0.1939 g). There was no body weight differences (P>0.05) between the fish treated with 20 mg/l and 30 mg/l of rGH, and between the fish treated with 10 mg/l rGH and control. Furthermore, the growth rate of rGH-treated fish was higher (P<0.05) compared with control. Survival of fry treated with rGH 30 mg/l (100%) was higher than the control and other treatments. Thus, immersion of fry in 30 mg/l rGH solution can be applied to enhance the growth of giant gouramy with a high survival rate.
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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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