Judul: Faedah Alat Ultrasonik Sebagai Penduga Komposisi Fisik Karkas Domba Dan Kambing Pada Lingkung Nutritif Yang Berbeda
Abstrak: Penelitian ini dilakukan di Laboratorium Ilmu Produksi Ternak Domba dan Kambing, Fakultas Peternakan, Institut Pertanian Bogor, dari bulan Oktober 1989 sampai Pebruari 1990. Tujuan Penelitian ini adalah untuk menduga komposisi fisik karkas domba dan kambing pada lingkungan nutritif yang berbera melalui pengukuran tebal lemak dengan metode ultraasonik (Renco-lean meter dan Scanoprobe).
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Judul: Studi perbandingan sifat fisik alat pencernaan antara kambing dan domba pada lingkungan nutritif yang berbeda
Abstrak: ivers Penelitian ini dilakukan di Laboratorium Ilmu Produk- si Ternak Ruminansia Kecil, Fakultas Peternakan, Institut Pertanian Bogor. Penelitian dilakukan dari bulan November 1989 sampai dengan Februari 1990. Tujuan dari penelitian ini adalah untuk mengetahui dan membandingkan sifat fisik alat pencernaan antara kam- bing dengan domba pada lingkungan nutritif yang berbeda dalam rangka hubungannya dengan efisiensi penggunaan ma- kanan dan optimalisasi produksi daging. Jumlah ternak yang digunakan adalah 18 ekor jantan lokal dan 18 ekor kambing Kacang jantan. masing jenis ternak tersebut diberi tiga perlakuan domba Masing- ransum yaitu ransum dengan protein 1, 1.5 dan 2 kali standar NRC. Bahan makanan yang digunakan terdiri atas rumput lapang, bungkil kedele, jagung kuning dan kalsium karbonat yang disusun berdasarkan kebutuhan. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap. Analisa data dilakukan dengan Analisa Sidik Ragam (ANOVA). Hasil penelitian menunjukan, bahwa domba lokal mempu- 1230.9 gram, jaringan oesophagus 40.15 gram, jaringan ruret 402.07 gram, jaringan omasum 36.83 gram, jaringan abomasUA 84.67 gram, jaringan usus halus 479.7 gram, jaringan colon 147.2 gram, jaringan sekum 40.33 gram serta panjang halusnya 22.02 meter. Pada kambing rataan usus bobot total jaringan alat pencernaan 870.9 gram, jaringan oesophagus 43.75 gram, jaringan ruret 258.17 gram, ja ngan omasum 36.83 gram, jaringan abomasum 54.17 gram, jaringan usus halus 336.17 gram, jaringan colon 118.17 gram, jaringan sekum 40.50 gram serta panjang usus halusnya 17.65 meter. Domba mempunyai bobot total jaringan alat pencernaan, jaringan rumen-retikulum, abomasum, usus halus dan panjang USUS halusnya lebih berat dan panjang (p<0.05) daripada kambing, sedangkan perlakuan ransum pada domba maupun kambing tidak menunjukkan perbedaan yang nyata terhadap sifat fisik jaringan alat pencernaan. Hasil penelitian ini menunjukan bahwa ransum dengan kandungan protein sama dengan rekomendasi NRC lebih efisisien dan ekonomis dibanding dengan ransum lainnya….
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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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