Judul: Respon Tikus Putih (Rattus norvegicus) yang Dikontaminasi Radikal Bebas terhadap Pemberian Tepung Delima (Punica granatum L.) sebagai Sumber Antioksidan
Abstrak: Saat ini keberadaan peternakan tidak hanya terdapat di daerah pedesaan, namun juga telah banyak berdiri di daerah perkotaan. Keberadaan peternakan di tengah kota perlu mendapatkan perhatian yang lebih dalam hal manajemen pemeliharaan ternaknya, karena saat ini kota-kota besar seperti Jakarta tercatat memiliki tingkat polusi tinggi yang dapat mengakibatkan terganggunya kesehatan ternak. Kesehatan ternak yang terganggu akan berdampak pada menurunnya atau rendahnya produksi yang dihasilkan dari ternak tersebut. Polusi yang semakin hari jumlahnya semakin bertambah itu merupakan sumber radikal bebas. Radikal bebas merupakan suatu atom, molekul, atau senyawa yang mengandung satu atau lebih elektron yang tidak berpasangan sehingga sangat reaktif. Pembentukan radikal bebas dalam tubuh dapat disebabkan oleh hasil samping proses oksidasi, olahraga yang berlebihan dan terkena serangan polusi lingkungan dari asap rokok, kendaran bermotor dan radiasi. Akibat dari radikal bebas dalam jumlah besar adalah gangguan produksi DNA, lapisan lipid pada dinding sel, pembuluh darah, produksi prostaglandin, kerusakan sel dan mengurangi kemampuan sel untuk beradaptasi terhadap lingkungannya yang pada akhirnya dapat menyebabkan kematian sel, sehingga menimbulkan efek berbahaya bagi kesehatan. Untuk mengatasi masalah radikal bebas dapat digunakan bahan yang mengandung antioksidan. Antioksidan didefinisikan sebagai inhibitor yang bekerja menghambat oksidasi dengan cara bereaksi dengan radikal bebas reaktif membentuk radikal bebas tak reaktif yang relatif stabil.
Keyword: animal health, DNA production disruption, lipid layer, cell wall, prostaglandin production

Judul: Efek Tepung Delima (Punica granatum L.) sebagai Sumber Antioksidan pada Metabolisme Tikus Putih (Rattus norvegicus) yang Dikontaminasi Asap Rokok, Effect of Pomegranate Powder as Antioxidant Source on Metabolism of White Rat (Rattus norvegicus) Contaminated with Cigarette Smoke
Abstrak: The effect of pomegranate fruit and seed powder as a source of antioxidant on consumption, digestion of lipid and crude fiber are evaluated in this study. Thirty of 28 day old rats were used in this experiment. This experiment used completely randomized design with three treatments and ten replications. The experimental rats were given diets containing pomegranate at levels of 0% (R0= control diet), 5% (R1= R0 containing 5% pomegranate fruit and seed powder) and 10% (R2= R0 containing 10% pomegranate fruit and seed powder). Variables measured were ether extract, crude fiber, NFE intakes and digestibilities and abdominal circumference. Data were analyzed with Analysis of Variance (ANOVA) and differences among treatments were tested by contrast orthogonal tests. Results show treatments affected nutrient intakes (P<0.01), but did not produced significant effect on nutrient digestibilies. There were no significant effect of treatments on the change in abdominal circumference. In conclusion, the use of pomegranate fruit and seed powder increased fat and carbohydrate intake in mice contaminated with cigarette smoke; however there were no effect on fat and carbohydrate digestibilities, and the change in abdominal circumference. The best result was produced by R1 which contained 5% pomegranate fruit and seed powder.
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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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