Judul: Pemberian Ekstrak Daun Murbei Yang Difermentasi Dengan Cairan Rumen Dalam Pakan Mencit (Mus Musculus) Sebagai Hewan Model Sistem Pasca Rumen
Abstrak: The objective of this experiment was to study the effect of fermented mulberry leaves extract utilization in mice feed as animal model for post ruminal system. This experiment used a completely randomized design, with 6 treatments and 4 replications. The treatments were P0 (semi purified diet), P1 (P0 + fermented rumen liquid residue), P2 (P1 + mulberry leaves extract 0.06% DNJ), P3 (P1 + fermented mulberry leaves extract 0.06% DNJ), P4 (P1 + mulberry leaves extract 0.12% DNJ), and P5 (P1 + fermented mulberry leaves extract 0.12% DNJ). The experiment was conducted for 24 days with 3 days adaptation periods. Variables observed were feed consumption, feed digestibility, daily body weight gain and blood glucose. The data were analyzed by Analysis of Variance, and differences among treatments were examined with Duncan’s Multiple Range Test. The results showed that the addition of mulberry leaves extract significantly (P<0.01) reduced daily body weight gain, consumption, and blood glucose, reduce feed digestibility (P<0.05) compared to control, but fermented mulberry leaves extract could reduce the negative effect of DNJ. Daily body weight gain of mice given 0.06% and 0.12% fermented mulberry leaves extract was significantly (P<0.01) higher than those mice given the same concentration of non fermented mulberry leaves extract (0.10 vs – 0.16 gram/day) and (0.01 vs – 0.14 gram/day). It is concluded that DNJ in mulberry leaves extract is not fully degraded in the rumen, and it still has negative effect to the variables measured. Keywords : mulberry leaves extract, fermented, mice, post ruminal
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Judul: Penambahan Jamu Ternak Dalam Pakan Ruminansia Dan Efeknya Terhadap Profil Fermentasi Rumen Secara In Vitro
Abstrak: Pakan hijauan memiliki peranan penting terhadap kebutuhan nutrien dan fermentasi rumen. Pakan sapi perlu diperhatikan baik dari segi kualitas maupun kuantitas. Upaya untuk meningkatkan kualitas pakan yaitu dengan cara pemberian nutrien yang cukup dan penambahan feed additive. Penelitian ini bertujuan untuk mengevaluasi pengaruh penambahan jamu ternak dalam pakan ruminansia terhadap profil fermentasi rumen. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) dengan 5 perlakuan dan 3 ulangan. Bahan feed additive pada penelitian ini adalah temulawak, kunyit, jahe, dan bawang putih yang dibuat dalam bentuk tepung jamu. Penggunaan jamu pada taraf 1%-4% mengandung senyawa aktif flavonoid, triterpenoid, dan quinon. Hasil penelitian menunjukkan bahwa masing-masing perlakuan tidak berpengaruh nyata (P>0.05) terhadap produksi gas dan kinetika gas. Perlakuan kelima (kontrol+4% jamu) menunjukkan nilai NH3 (amonia) yang optimal (20.78 mM). Nilai kecernaan bahan kering (70.19%) dan bahan organik (69.99%) tertinggi dihasilkan pada perlakuan kelima (kontrol+4% jamu).
Keyword: fermentasi rumen, jamu ternak, senyawa aktif

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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