Judul: Efektivitas pemberian ekstrak etanol purwoceng (Pimpinella alpina) selama 1-13 hari kebuntingan terhadap bobot ovarium dan uterus tikus putih (Rattus sp.)
Abstrak: The research was aimed to examine the effects of purwoceng ethanol extract on the ovarium and the uterus weight of pregnant rat during 1-13 days gestation. This study consisted of two groups, the control group (no treatment) and the group that was given purwoceng ethanol extract. Purwoceng has been known as an estrogenic plant. Purwoceng ethanol extract was given on the first day until the 13th day of gestation. Rat were dissected on the 13th day of pregnancy to get the ovarium and the uterus weight. The result had shown that purwoceng ethanol extract tended to increase ovarium weight as well as the uterus weight.
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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: 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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