Judul: Physical and Chemical Characteristics of Dry Grated Sago (Sapuring) as An Alternative Feed Ingredient
Abstrak: Total areal sagu di dunia adalah 6,5 juta ha dan Indonesia memiliki lahan sagu 5,5 juta ha, pemanfaatan sagu di Indonesia kurang dari 5%. Penelitian bertujuan mengkaji karakteristik fisik dan kimia sapuring sebagai bahan pakan alternatif. Penelitian menggunakan Racangan Acak Lengkap (RAL) dengan 3 perlakuan dan 3 ulangan. Perlakuan yang digunakan yaitu, utuh (P1), penyaringan mash 30 (P2), peremukan dan penyaringan mash 30 (P3). Data diuji ANOVA dilanjut uji Duncan. Parameter yang diukur yaitu sifat fisik; kerapatan tumpukan, kerapatan pemadatan tumpukan, ukuran partikel, sudut tumpukan, dan berat jenis. Sifat kimia; analisis proksimat (bahan kering, abu, protein kasar, lemak kasar, serat kasar, bahan ekstrak tanpa nitrogen), gross energy, serat kasar, dan kelarutan total. Hasil ukuran partikel pada P1 688,42 μm; P2 371,18 μm dan P3 370,81 μm. Berat jenis untuk P1 0,86 g cm-3, P2 1,11 g cm-3 dan P3 1,25 g cm-3. Analisis proksimat bahan kering 87,94-88,11%, abu 3,31-4,00%, protein kasar 2,51-3,44%, lemak kasar 0,11-0,18%, serat kasar 2,36-5,19%, dan bahan ekstrak tanpa nitrogen 76,53-78,72%. Gross energy memiliki hasil 3509-3620 kkal kg-1, kelarutan total 14,65-16,36%. Penyaringan dengan mash 30 dapat mengurangi serat kasar hingga 55%. Berdasarkan hasil penelitian, sapuring dapat dijadikan sebagai bahan pakan alternatif., The area of sago in the world is 6,5 mio ha and Indonesia has 5,5 mio ha of sago land, the application of sago in Indonesia is less than 5% of total potential. The purpose of this study was to examine the physical and chemical characteristics of sapuring as an alternative feed ingredient. The study used a Completely Random Design (CRD) method with 3 treatments and 3 replications. The treatments applied, whole (P1), sieving with mash 30 (P2), crush, and sieving with mash 30 (P3). The results were analyzed by ANOVA and continued with Duncan's test. The parameters are physical characteristics; bulk density, compact bulk density, particle size, angle of repose, and specific density. Chemical characteristics; proximate analysis (dry matter, ash, crude protein, crude lipid, crude fiber, nitrogen free extract), gross energy, crude fiber, and total solubility. The results of the physical characteristic were particle size at P1 688,42 μm, P2 371.18 μm, and P3 370.81 μm. specific density for P1 0.86 g cm-3, P2 1.11 g cm-3 and P3 1.25 g cm-3. Chemical characteristics of the proximate dry matter 87.94-88.11%, ash 3.31-4.00%, crude protein 2.51-3.44%, crude lipid 0.11-0.18%, crude fiber 2.36-5.19%, and nitrogen free extract 76.53-78.72%. Gross energy has a result of 3509-3620 kcal kg-1 and a total solubility of 14.65-16.36%. Sieving with mash 30 can reduce crude fiber until 55%. Based on the results sapuring can be used as an alternative feed
Keyword: chemical characteristic, energy source, physic characteristic, sapuring

Judul: Uji In Vitro Batang Sagu (Metroxylon sp) Pada Ransum Sapi Potong
Abstrak: Penelitian ini bertujuan mengevaluasi penggunaan batang sagu sebagai pakan sapi potong secara in vitro. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan 5 perlakuan dan 4 kelompok. Perlakuan yang digunakan terdiri dari P0 (ransum kontrol: 20% hijauan + 80% Konsentrat), P1 (20% hijauan + 67,5 % konsentrat + 12,5% batang sagu), P2 (20% hijauan + 55 % konsentrat + 25% batang sagu), P3 (20% hijauan + 42,5 % konsentrat + 37,5% batang sagu), dan P4 (20% hijauan + 30% konsentrat + 50% batang sagu). Parameter yang diukur dalam penelitian ini adalah derajat keasaman (pH) dalam fermentor, koefisien cerna bahan kering, koefisien cerna bahan organik, konsentrasi NH3, serta konsentrasi VFA total. Hasil penelitian menunjukkan penggunaan batang sagu utuh 37,5% ke dalam ransum meningkatkan dengan nyata KCBK, KCBO, dan konsentrasi VFA total yang diukur (P<0.05), kecuali derajat keasaman (pH) di dalam rumen dan konsentrasi NH3., In Vitro test of sago stems (Metroxylon sp) on beef cattle rations. Guided by DIDID DIAPARI and HERI AHMAD SUKRIA. This study aims to evaluate the use of sago stems as feed for beef cattle in vitro. This study used a Randomized Block Design (RAK) with 5 treatments and 4 groups. The treatments used consisted of P0 (control ration: 20% forage + 80% concentrate), P1 (20% forage + 67.5% concentrate + 12.5% sago stalks), P2 (20% forage + 55% concentrate + 25 % sago stalks), P3 (20% forage + 42.5% concentrate + 37.5% sago stalks), and P4 (20% forage + 30% concentrate + 50% sago stalks). The parameters measured in this study were the degree of acidity (pH) in fermentor, dry matter digestibility coefficient, organic matter digestibility coefficient, NH3 concentration, and total VFA concentration. The results showed that the use of 37.5% whole sago stalks into the diet significantly increased KCBK, KCBO, and total VFA concentration measured (P<0.05), except for the degree of acidity (pH) in the rumen and NH3 concentration.
Keyword: batang sagu, fermentasi, in vitro, kecernaan

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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