Judul: Penambahan Antioksidan dalam Ransum Kaya Asam Lemak Tak Jenuh terhadap Penampilan Induk Domba Garut Laktasi
Abstrak: Penelitian bertujuan untuk menguji pengaruh antioksidan vitamin E dan ekstrak teh hitam dalam ransum kaya asam lemak tak jenuh terhadap penampilan induk domba garut laktasi. Penelitian didesain menggunakan rancangan acak lengkap (RAL) dengan 3 perlakuan dan 5 ulangan yaitu P0 (ransum mengandung asam lemak tak jenuh), P1 (P0 + antioksidan vitamin E 500 ppm), dan P2 (P0 + antioksidan ekstrak teh hitam 500 ppm). Peubah yang diamati meliputi konsumsi bahan kering, konsumsi zat makanan, penyusutan bobot badan, pertambahan bobot badan, efisiensi pakan, dan produksi susu induk domba. Data diolah menggunakan analisis ragam (ANOVA). Hasil menunjukkan penambahan antioksidan dalam ransum kaya asam lemak tak jenuh tidak berpengaruh nyata terhadap konsumsi bahan kering, konsumsi zat makanan, penyusutan bobot badan, pertambahan bobot badan, dan efisiensi pakan (P>0.05). Perlakuan berpengaruh nyata terhadap produksi susu induk domba (P<0.05). Penampilan induk domba garut laktasi yang mendapat ransum kaya asam lemak tak jenuh tidak dipengaruhi oleh penambahan antioksidan vitamin E dan ekstrak teh hitam.
Keyword: asam lemak tak jenuh, domba garut, ekstrak teh hitam, penampilan, vitamin E.

Judul: Penambahan Antioksidan dalam Ransum Kaya Asam Lemak Tak Jenuh terhadap Kualitas Susu Induk dan Performa Domba Prasapih
Abstrak: Penelitian ini bertujuan untuk mengkaji pengaruh antioksidan vitamin E dan ekstrak teh hitam dalam ransum mengandung kaya asam lemak tak jenuh terhadap kualitas susu induk dan performa anak domba prasapih. Penelitian ini menggunakan desain rancangan acak lengkap (RAL) dengan 3 perlakuan dan 5 ulangan pada 15 ekor induk domba. Perlakuan yang diberikan terdiri dari A0 (ransum tinggi asam lemak tak jenuh tanpa antioksidan), A1 (A0+ 500 ppm vitamin E), dan A2 (A0+ 500 ppm ekstrak teh hitam). Peubah yang diukur dalam penelitian ini meliputi komposisi protein, laktosa, berat jenis susu, pertambahan bobot badan anak, bobot sapih anak, daya tahan tubuh anak domba sampai lepas sapih. Data diolah dengan menggunakan analisis ragam (ANOVA). Hasil penelitian menunjukkan penambahan antioksidan vitamin E dan ekstrak teh hitam memperbaiki berat jenis, protein dan laktosa susu induk. Perlakuan penambahan antioksidan tidak berpengaruh nyata (P>0.05) terhadap bobot sapih anak. Perlakuan berpengaruh nyata (P<0.05) terhadap pertambahan bobot badan anak 0-28 hari.
Keyword: antioksidan, asam lemak tak jenuh, komposisi susu, performa domba

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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