Judul: Study of Androgenic Effect of Ethanolic Extract of Root Purwoceng (Pimpinella alpina KDS) on the Reproduction Performance of Adult Female Rats (Rattus norvegicus)
Abstrak: which had been used in male reproductive research because it has androgenic property. Studies of purwoceng on female reproductive performance is not clearly yet. This research was conducted to explore the effect of purwoceng on duration of each period and total time of estrus cycle. A total of 48 female rats strain of Sprague Dawley were divided into 4 groups based on their estrous period: proestrus, estrus, metestrus and diestrus. Each group consisted of 6 rats as a control and 6 rats as treated animals. Extract of purwoceng was given oraly every day for 10 days. After 10 days, half of them were sacrificed and the rest of group were continued for vaginal smears examination until day 15. The results showed that purwoceng given at various periods during 2 cycles of estrous extend the time period of proestrus and estrus, and significantly different in estrous period when given during the period of estrus (P<0.05) compare to other period. Time period of metestrus and diestrus were decreased except period of metestrus which increased during administration of purwoceng on metestrus. The weight of uterine and ovarian was higher on rats receiving purwoceng during estrus period than the control (P<0.05). The conclusion of this research was that the administration of purwoceng was more effective when it was given at times of estrus period.
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Judul: Siklus Reproduksi Anak Tikus Dari Induk Yang Diberi Ekstrak Etanol Akar Purwoceng Selama 13–21 Hari Kebuntingan.
Abstrak: Purwoceng (Pimpinella alpina) is one of Indonesian medicinal herbals that was originating from high altitudes area such as Dieng at Central Java. Its root has an efficacious as aphrodisiac because of its compound such as isoflavon group. The aim of this study was to test the efficacy of phytoestrogens contained in purwoceng (Pimpinella alpina) on the descended testes, vaginal opening and estrous cycle. This study used two groups of pregnant rats. The first group consist of four pregnant rats which were given purwoceng root ethanol extract with dose of 25 mg / ml per 300 g BW orally at 13–21 gestation. The second group of rats were given water at the 13th day of gestation to 21 as a control. All pregnant rats were selected rats which has delivered 8–9 pups. The results showed that time of descended testes and vaginal opening of purwoceng group was earlier than control, descended testes of purwoceng group was on day 29 and vaginal opening was on day 36. Descended testes of control group was on day 34 and vaginal opening was on day 38. Length of estrous cycle in purwoceng group were longer than control with proestrus and estrus phase were also longer than control.
Keyword: Estrous cycle, ethanol extracted, purwoceng roots, Rattus norvegicus, vaginal opening

Judul: Formulasi Hamiltonian untuk Menggambarkan Gerak Gelombang  Internal pada Laut Dalam
Abstrak: Laut dapat dianggap terdiri dari lapisan-lapisan air yang memiliki rapat massa yang berbeda. Perbedaan rapat massa air laut dapat disebabkan oleh perbedaan kadar garam dan temperatur pada setiap lapisan air laut. Akibat perbedaaan rapat massa ini, maka muncul suatu gelombang. Gelombang internal adalah suatu gelombang yang terjadi di bawah permukaan, yang merupakan batas dua lapisan air laut karena adanya perbedaan rapat massa pada setiap lapisan air laut. Pada penelitian ini akan dibatasi pada fluida dua lapisan dengan kedalaman yang cukup besar. Diasumsikan bahwa kedua lapisan fluida ini masing-masing mempunyai rapat massa yang konstan dan berupa fluida ideal, yaitu fluida yang tak mampat (incompressiable) dan tak kental (inviscid). Gelombang interfacial terjadi pada batas kedua lapisan fluida (interface)
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