Judul: Nori Analog Formulation from Ulva lactuca Seaweed with the Addition of Surimi
Abstrak: Nori merupakan produk pangan ringan yang dibuat dengan bahan dasar rumput laut. Nori yang dibuat dari rumput laut Ulva lactuca akan menghasilkan nori dengan tekstur yang mudah robek dan memiliki kandungan protein yang rendah. Penambahan bahan lain untuk memperbaiki tekstur dan meningkatkan nilai gizi nori dapat dilakukan. Surimi dengan sifatnya yang mampu membentuk gel serta memiliki kandungan protein yang tinggi. Penelitian ini bertujuan menentukan pengaruh penambahan surimi terhadap kualitas nori analog, serta menentukan karakteristik fisik dan kimiawi nori analog yang dihasilkan. Proses formulasi nori dilakukan dengan penambahan surimi perlakuan 28, 30, dan 32% (b/b). Nori analog dengan penambahan surimi 28% memiliki nilai protein tertinggi sebesar 28,11% (basis kering). Nori analog dengan perlakuan penambahan surimi 32% memiliki jumlah asam amino terbanyak. Penambahan surimi mempengaruhi komposisi kimia yang terkandung dalam nori analog. Formula nori analog terpilih berdasarkan hasil uji hedonik yaitu dengan penambahan surimi 30%., Nori is a snack product made with seaweed as the basic ingredient. Nori which made with Ulva lactuca will produce nori with a texture that is easily torn and has a low protein content. The addition of other ingredient to improve the texture and increase the nutritional value of nori. This study aims to determine the effect of adding surimi to quality of nori analog, as well as to determine the physical and chemical characteristics of the resulting nori analog. The nori analog formulation process was carried out with the addition of 28, 30, and 32% (w/w) surimi treatments. Nori analog with the addition of 28% surimi had the highest protein value of 28,11% (dry basis). Nori analog treatment with the addition of 32% surimi had the highest number of amino acids. The addition of surimi affects the chemical composition contained in nori analog. The nori analog formula was selected based on the results of the hedonic test with addition of 30% surimi.
Keyword: formulation, nori, Nori Analog, Surimi, Ulva lactuca

Judul: Formulation of Nori-Like from Green Seaweed Ulva lactuca with the Addition of  Boiled Water
Abstrak: Pembuatan produk nori-like dapat dilakukan menggunakan rumput laut Ulva lactuca, dengan menambahkan air rebusan pemindangan. Tujuan penelitian ini menentukan formula ¬nori-like terbaik, dari U. lactuca dengan penambahan air rebusan pemindangan, serta mengevaluasi karakteristik produk nori-like U. lactuca dengan penambahan air rebusan dari proses pemindangan. Pembuatan produk nori-like dilakukan dengan menambahkan konsentrat air rebusan pemindangan dengan jumlah yang berbeda dalam proses pengolahan. Formulasi terpilih, secara sensori, dalam pembuatan nori-like yaitu dengan menambahkan konsentrat air rebusan pemindangan sebanyak 3%. Produk nori-like yang dibuat pada penelitian ini memiliki nilai gizi yang lebih rendah dibandingkan nori yang telah komersil, akan tetapi hasil yang diperoleh telah menunjukkan bahwa penambahan 3% konsentrat air rebusan pemindangan dalam pembuatan nori-like dapat meningkatkan nilai gizi pada produk nori-like, dengan kadar air 12,77%, abu 14,53%, protein 17,02%, lemak 5,88%, dan serat pangan 25,77%. Asam amino yang mendominasi pada nori-like terpilih yaitu histidina, asam glutamat, dan glisina. Produk ini memiliki nilai aw 0,59 serta intensitas warna L,a,b berturut-turut 14,28, 0,76, dan 14,44., Nori-like products can be made using Ulva lactuca seaweed, with an additional boiled fish water. The purpose of this study was to determine the selected nori-like formula, made from U. lactuca with the addition of boiled fish water, and to evaluate the characteristics of nori-like from U. lactuca with the addition of boiled water from boiling process. The making of nori-like products was done by adding different amounts of boiled water concentrate during the process. The selected nori-like formula was made by adding 3% of the concentrated boiled water. The nori-like products made in this study contained a lower nutritional value than commercial nori, but the results obtained have shown that an additional 3% of the boiled water concentrate in the processing of nori-like can increase the nutritional value of nori-like, with 12.77% water content, 14.53% ash, 17.02% protein, 5.88% fat, and 25.77% dietary fiber. The dominant amino acids in the selected nori-like were histidine, glutamic acid, and glycine. This product has an aw value of 0.59 and L, a, b values of 14.28, 0.76, and 14.44, respectively.
Keyword: nori-like, Ulva lactuca, boiled water

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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