Judul: Penggunaan Albumin Serum Sapi dalam Perendaman Hormon Pertumbuhan Rekombinan pada Benih Ikan Gurami
Abstrak: Immersion of recombinant growth hormone can improve the growth of giant gourami juvenile. This research was conducted to examine the effectiveness of 0,12 mg/L recombinant Ephinepelus lanceolatus growth hormone (rElGH) immersion with and without bovine serum albumin (BSA). This study used a randomized complete design with 3 replicates and the treatment are 0,12 mg/L rElGH and BSA 100 mg/L (P1) compare with 0,12 mg/L rElGH without BSA (P2) and without rElGH without BSA (K) as control. Immersion was done for 1 hour, fish was then reared for 6 weeks and fed with tubifex with ad libitum. The result showed that rElGH treatment without BSA was not significantly affected body weight, biomass, and spesific growth rate (P>0,05) while the immersion of rElGH with BSA could increased 113.12% biomass compared to the rElGH immersion without BSA. Immersion of recombinant growth hormone to improve growth of giant gourami juvenile without BSA is not effective.
Keyword: giant gourami., immersion, BSA, recombinant growth hormone, rElGH

Judul: Respons benih ikan gurame (Osphronemus goramy) yang diberi hormon pertumbuhan rekombinan melalui oral pada dosis berbeda
Abstrak: This study was aimed to evaluate the response of giant gourami juvenile on oral administration of recombinant giant grouper growth hormone (rElGH). A total of 45 juvenile were fed with rElGH coated by hydropropylmethyl cellulose phthalate (HP55) and mix with commercial diet (35% protein content). Feeding fish with diet containing four different doses of rElGH (0 mg/kg feed, 0.3 mg/kg feed, 3.0 mg/kg feed, and 30.0 mg/kg feed) was performed in twice a week for 2 month. Fish were then maintained for 1 month without rElGH treatment. The results showed that biomass harvest in treatment 3.0 mg/kg (1,376.0±38.3 g) and 30.0 mg/kg (1,362.2±78.5 g) was similar, and the two treatments were 46.76% and 44.28% higher compared to control (977.6±96.7 g), respectively. In addition, rElGH treatment increased appetite, while artificial feed conversion ratio (1.18) was lower (P<0.05) by 23.72% compared to that of control (1.46). Oral administration of rElGH also increased hepatosomatic index (16.12%) and protein content (17%), while lipid content (21%) decreased compared to control. Similar in fish survival at end of experiment, insulin-like growth factor-1 and growth hormone receptor-1 gene expression levels in brain at 24 hours after feeding in rElGH treatment and control were obtained. Thus, orally rElGH administration was effective to be applied to enhance the growth of giant gourami juvenile.
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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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