Judul: Efek Sinergis Taurin Lintah Laut (Discodoris sp.) dan Temulawak (Curcuma xanthorriza Roxb.) dalam Serbuk Minuman Fungsional
Abstrak: Aquatic resources such as sea slug (Discodoris sp.) can be made into functional beverages. Sea slug has been reported to possess antioxidant properties which allege that the functional drink made from sea slug contains taurine. The study was conducted into 3 phases: 1 )preparation of raw materials (Discodoris sp.) 2) preparation of additional ingredients (ginger, curcuma and lemon) 3) formulation of the functional beverage product. The aim of the study were 1) to determine the concentration of raw materials composition by considering the synergistic effect of taurine on the functional beverage, 2)to determine the effect of the preparation of functional beverage powders on total taurine, 3)to determine the effect of storage on taurine content functional beverage powders sea slug. Three best formula which physically acceptable:T1 formula (Discodoris sp. 20%, ginger 40%, curcuma 20%, lemon 20%),T2 Formula (Discodoris sp. 25%, ginger 40%, curcuma 15%, lemon 20%), and T3 Formula (Discodoris sp. 30%, ginger 40%, curcuma 10%, lemon 20%). Addition of sea slug, ginger, curcuma and lemon in formulation caused a synergistic effect on taurine content. The length of storage decreased the amount of taurine in the functional beverage powders sea slug.
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Judul: Formulasi Minuman Fungsional Omega-3 dari Lintah Laut (Discodoris sp.)
Abstrak: Water resources such as Sea slug (Discodoris sp.) can be made as functional beverages. One of the important compound in Sea slug is omega-3 fatty acid. Omega-3 fatty acid is useful for our healthy. The study aimed to determine the best formulation based on the content of omega-3 in functional beverage of sea slug. The study was conducted in three phases: 1) the preparation of raw materials (Discodoris sp.), 2) the preparation of additional ingredients (ginger and soybean), 3) the stage of formulation of the functional beverage products. There were are three formulation, formulation A1 (Discodoris sp. 20%, ginger 35%, soybean 45%), A2 (Discodoris sp. 25%, ginger 35%, soybean 40%), and A3 (Discodoris sp. 30%, ginger 35%, soybean 35%). The best formulation with highest omega-3 and sensory was achieved in formulation A1. Sea slug functional beverage can be sources of omega-3 fatty acid. Testing the stability of the parameters chemical and microbiological shelf life by showing prediction of critical parameters is TPC, the formula A1 has a shelf life of 64 days at 30 oC, 70 days at 35 oC, and 84 days at 45 oC. The higher storage temperature the shelf life of the product will be longer.
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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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