Judul: Penggunaan Destillers Dried Grain with Solubles (DDGS) Jagung sebagai Sumber Protein Nabati Pakan Benih Ikan Gurame Osphronemus gouramy Lac.
Abstrak: This experiment was conducted to examine the effect of the use of DDGS as a source of vegetable protein on the growth of the giant gouramy O. gouramy Lac. juvenile. Feed is devided into two, the feed for testing of digestibility and testing of growth. The feed for testing of digestibility are References Diet (100% control of feed) and Test Diet (70% of control feed and 30% of DDGS), while the feed for testing of growth are 0%, 10%, 20%, and 30% DDGS. The fish were feed the experimental diet at satiation. Giant gouramy be used in this research have weight 4.72±0.78 g. Culture of fish conducted during 40 days in the aquarium sized 50x40x35 cm. Test of growth from DDGS up to 30% showed no significant difference (P>0.05) in daily growth rate (2.82 to 2.91%), survival rate (100%), feed consumptions (139.07-159.22 g), and feed efficiency (64.52-71.05%). Whereas, protein retention (16.29 to 25.02%), lipid retention (31.36 to 53.52%) are significantly different with control. It is conclude that the use of DDGS as the source of vegetable protein with various consentration on the feed of giant gouramy until 30% didn’t affect the daily growth rate, survival rate, and feed consumptions. The highest feed efficiency of DDGS treatment is 20%.
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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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