Judul: Performa, absorpsi dan profil mineral darah domba kembar lepas sapih yang mendapat kobalt dan bakteri rumen selama prasapih
Abstrak: Periode transisi pasca sapih merupakan periode kritis; mikroba rumen anak domba belum berkembang, pemberian susu dihentikan dan pemberian pakan diubah dari pakan yang mudah dicerna ke pakan yang sulit dicerna. Namun performa anak domba dan perkembangan bakteri rumennya selama prasapih dapat mempengaruhi utilisasi nutrien dan performanya pada periode transisi lepas sapih. Penelitian ini bertujuan untuk mengevaluasi performa, absorpsi dan profil mineral di darah (Ca, P, dan Mg) pada anak domba lepas sapih yang diberi Co dan konsorsium bakteri rumen selama periode prasapih. Sebanyak 8 ekor domba garut umur 3-4 bulan dengan kisaran bobot badan 9.86±2.02 kg digunakan dalam penelitian yang sudah dibagi ke dalam dua perlakuan yaitu kontrol dan pasca pemberian konsorsium bakteri rumen selama periode prasapih (CoBac) dan dikelompokkan menjadi empat kelompok berdasarkan bobot badan. Hasil menunjukkan bahwa pemberian Co dan konsorsium bakteri rumen selama periode prasapih belum dapat mempengaruhi performa, absorpsi mineral dan profil mineral darah domba saat lepas sapih.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Absorption, Blood, Co+rumen bacteria, Mineral, Performance

Judul: Performa Absorpsi dan Profil Mineral Darah Domba Kembar Lepas Sapih yang Mendapat Kobalt dan Bakteri Rumen Selama Prasapih.
Abstrak: The transition period at post-weaning is a crucial period; the microbial rumen of lamb is not developed yet, milk diet has been removed and the feeding regime is changed. However, growth performance and rumen bacteria in preweaning period affects the growth and nutrient utilization of weaned lamb. The study was designed to evaluate the performance, the absorption and the blood mineral profile (Ca, P, and Mg) in post-weaning lamb offered Co and rumen bacteria consortium previously in the pre-weaning period. Three-four months old of 8 garut sheep with initial body of 9.86±2.02 kg were divided into two treatments groups of control and the post administration of rumen bacteria consortium (CoBac) groups. Results showed that administration of Co and rumen bacteria consortium during pre-weaning period had no effect on performance, mineral absorption and blood mineral profile in post-weaning. It is concluded that administration of Co and rumen bacteria consortium during pre-weaning period of lamb did not improve the performance and nutrient utilization during transition period.
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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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