Judul: Efektivitas Pemberian Ektrak Etanol Purwoceng (Pimpinella alpina) pada Hari 1-13 Kebuntingan terhadap Keberhasilan Implantasi pada Tikus Putih (Rattus sp.)
Abstrak: Purwoceng is medicinal herbs that also have ability as estrogenic compound. The study was conducted to analyse the effect of ethanol extract purwoceng on implantation site, corpus luteum number, and ratio of implantation site to corpus luteum. A total of 8 pregnant rats were used in this study. They were devided into 2 groups; control group and treated group. The pregnant rats from treated group were given ethanol extract purwoceng with dose 83,25 mg/kg body weight starting from day 1 until 13 days of pregnancy. The control group is a non treated pregnant rats. Total of implantation site, corpus luteum number, and ratio of implantation site to corpus luteum were analyzed by non-parametric methode. The result showed that ethanol extract purwoceng in treated pregnant had a higher ratio value than negative control. Total of implantation site in treated group almost equal to the total of corpus luteum. The conclusion of this study that purwoceng ethanol extract can increase the success of implantation
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Judul: Efektivitas Pemberian Ekstrak Etanol Purwoceng (Pimpinella alpina) pada Hari 1-13 Kebuntingan Terhadap Keberhasilan Implantasi pada Tikus Putih (Rattus sp.)
Abstrak: Purwoceng adalah tanaman herbal yang bersifat estrogenik. Penelitian dilakukan untuk menganalisa pengaruh ekstrak etanol purwoceng terhadap titik implantasi, jumlah korpus luteum dan rasio titik implantasi terhadap korpus luteum. Sebanyak 8 tikus betina bunting yang digunakan dalam penelitian ini dibagi menjadi 2 kelompok; kontrol dan perlakuan. Tikus betina dari kelompok perlakuan diberi ekstrak etanol purwoceng dengan dosis 83,25 mg/kg BB sejak hari 1-13 kebuntingan. Sedangkan kelompok kontrol adalah tikus betina yang tidak mendapatkanekstrak etanol purwoceng Jumlah implantasi, jumlah korpus luteum dan rasio titik implantasi terhadap jumlah korpus luteum dianalisis dengan metoda nonparametrik. Hasil penelitian menunjukan bahwa ekstrak etanol purwoceng yang diberikan pada tikus perlakuan memiliki rasio lebih tinggi di banding kontrol. Jumlah titik implantasi pada kelompok perlakuan memiliki nilai yang sama dengan jumlah korpus luteum. Kesimpulan dari penelitian ini adalah ekstrak etanol purwoceng dapat meningkatkan keberhasilan implantasi. Hak
Keyword: Purwoceng, Estrogenic, Progesterone, Corpus luteum, Ovarium

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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