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: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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