Judul: Suplementasi piruvat dan laktat dalam medium kultur modifikasi m-16 guna meningkatkan perkembangan embrio mencit (Mus musculus albinus) in vitro
Abstrak: Penelitian ini dilaksanakan pada bulan April 1997 hingga bulan Februari 1998 di laboratorium Embriologi Fakultas Kedokteran Hewan Institut Pertanian Bogor. Tujuan penelitian ini adalah untuk mengetahui suplementasi piruvat dan laktat dalam medium kultur modifikasi M-16 guna meningkatkan perkembangan embrio mencit (Mus musculus albinus) in vitro. Manfaat penelitian ini adalah untuk memperoleh medium modifikasi yang ideal dengan konsentrasi yang lebih baik untuk meningkatkan perkembangan embrio mencit in vitro.
Keyword: Mus musculus albinus, Reproduction, Mouse

Judul: Perkembangan Embrio Mencit (Mus musculus albinus) Pada Inkubator CO2 Termodifikasi
Abstrak: The present study was conducted to investigate effectiveness of a simple portable CO2 incubator for embryo production (IVEP) of mouse embryo by in vitro. In an attempt to determine the culture system was using CO2 gas produced from effervescent powder that approaches a standard CO2 incubator condition (5- 6%) (B), than embryos were examine at condition with a dose of effervescent formulations below (A), and upper (C) dose of normal condition. In vitro development rates of mouse embryos cultured in the portable CO2 incubator were not significantly different from the standard (control) CO2 incubator in a variety of treatment, which shows that mouse embryos can growth as well as in these conditions. Although there were no significant differences between the two systems in terms of embryos development, but there was a significantly differences for CO2 gas generated in situ in three treatments were compared with standard CO2 incubator (control). Concentration of CO2 gas in situ in a portable CO2 incubator was higher (P<0.05) than control (5.02 ± 0.08366%) for C (6.74 ± 0.24083%) treatment, but lower than control for A (2.22 ± 0.08366%) and B (4.46 ± 0.05477%) treatments. The present study indicates that a portable CO2 incubator is a useful device for in vitro mouse embryos production. Further studies using this portable incubator system are needed to determine the optimum levels of O2, CO2, and air pressure.
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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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