Judul: Sifat Fisik dan Sensori Snack Ekstrusi dengan Penambahan Tepung Daging Tulang Leher Ayam Pedaging.
Abstrak: Snack merupakan makanan ringan yang digemari oleh seluruh lapisan masyarakat. Tak heran bila penjualan snack tidak pernah merosot bahkan jenis makanan ini muncul dalam bentuk dan rasa yang lebih bervariasi. Snack ekstrusi merupakan kelompok snack yang dibuat melalui pemasakan ekstrusi dengan menggunakan alat extruder. Snack ekstrusi yang beredar di pasaran, umumnya memiliki kandungan gizi yang rendah dan flavor pada produk menggunakan bahanbahan sintetik seperti MSG (monosodium glutamat) yang akan menimbulkan efek samping jika bahan-bahan tersebut terakumulasi dalam jumlah yang banyak pada tubuh manusia. Salah satu usaha untuk meningkatkan kandungan gizi serta untuk meningkatkan cita rasa gurih pada snack ekstrusi adalah dengan menambahkan bahan baku snack yang berupa grits jagung dengan tepung daging-tulang leher ayam. Penelitian ini bertujuan untuk mempelajari karakteristik fisik dan sensori snack ekstrusi yang ditambahkan tepung tulang leher ayam.
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Judul: Pemanfaatan Tepung Daging- Tulang Leher Ayam Pedaging pada Pembuatan Makanan Ringan (Snack) untuk Meningkatkan Nilai Gizi
Abstrak: Snack quite popular in Indonesia, it was practical and long storage characteristics made them highly consumed. Broiler’s neck meat and bone meal is one of animal byproduct from animal product industries. It can change into meal and as an alternative source of proteins and minerals. Snack products commonly doesn’t have a balanced nutritional composition, so this research conducted to study the making of snack which increasing with broiler’s neck meat and bone meal and to evaluate the physical characteristic, nutritional composition and consumer’s acceptability of products. The nutritional content observed from the product consisted of water, protein, fat, carbohydrate, ash, calcium and phosphor. The physical analysis observed consist of hardness, kamba’s density and objective color analysis. An organoleptic test was also done. Experimental design used in this reseach was Completely Randomized Design with broiler’s neck meat and bone meal concentration as the response which five concentration stages 0%; 2,5%; 5%; 7,5% and 10%. Each stage consist three replications. The data was analyzed with Analysis of Variance and if the result was significantly different, it was followed with Duncan’s test. The panelist acceptability data was analyzed with Kruskal Wallis and if the result was significantly different, it was followed with mean rank different test that built by Gibbons. The results of nutritional content analysis seen that the water content ranged from 4,53-4,11%; protein content of 9,87-16,15%; fat 21,87-24,85%; carbohydrate 61,09-47,78%; ash 2,62-7,09% calcium 0,029-0,588% and phosphor 0,063-0,095%. The nutritional content analysis result showed that increasing that broiler’s neck meat and bone meal make significantly differences. The physical characteristic result showed that increasing of broiler’s neck meat and bone meal didn’t make significantly differences to fragility and kamba’s density. The average of fragility was 1611,08±43,80 gram force and 1,083±0,005 g/ml for kamba’s density. Objective color analysis showed that increasing of broiler’s neck meat and bone meal incline lower yellowness and got dark to the snack product. The result of organoleptic test to the colour, chicken taste and crispiness gave very obvious influence. The texture and general appearance of the snack didn’t give obvious influence.
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Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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