Judul: Penggunaan Lidah Buaya Aloe Vera barbadens  Kering dan Segar sebagai Imbuhan Pakan dan  Pengaruhnya terhadap Aktivitas Enzim serta  Performans Ayam Pedaging
Abstrak: Suatu penelitian telah dilakukan untuk mengetahui pengaruh penambahan gel lidah buaya (Aloe Vera barbadens) kering dan segar sebagai irnbuhan pakan ayam pedaging. Sebanyak 4 ekor ayam umur 5 minggu digunakan untuk melihat respons ayam pedaging terhadap gel lidah buaya segar, sedangkan 180 ekor anak ayam dialokasikan secara acak ke dalam 6 jenis perlakuan, yaitu (1) ransum basal (RB) + 0,25 g gel lidah buaya kering (GLBK)/kg ransum, (2) RB + 0,50 g GLBWkg ransum, (3) RB + 1,O g GLBKkg ransum, (4) RB + 25 g gel lidah buaya segar (GLBS), (5) RB + 50 g GLBSkg ransum dan (6) RB + 100 g GLBSkg ransum.
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Judul: Studi banding bahan ransum dan kadar protein dengan penambahan mineral-vitamin pada ayam pedaging
Abstrak: Penelitian ini dilakukan di Kandang milik Jurusan Ilmu Nutrisi dan Makanan Ternak, Fakultas Peternakan, Ins- titut Pertanian Bogor, selama enam minggu sejak tanggal 5 September 1985 sampai dengan tanggal 17 Oktober 1985. Tujuan penelitian ini adalah mempelajari kemampuan tepung ubi kayu sebagai bahan ransum ayam pedaging, un- tuk menggantikan jagung. Penelitian ini menggunakan percobaan faktorial 3x2x2 dengan Rancangan Acak Lengkap yang terdiri atas tiga ba- han ransum (jagung, ubi kayu berkulit dan ubi kayu tanpa kulit), kesatuan protein ransum (23 persen untuk periode stater, 20 persen untuk periode finisher; dan 20 persen untuk periode stater, 18 persen untuk periode finisher) dan penggunaan mineral-vitamin (tidak ditambahkan dan ditambahkan). Mineral yang ditambahkan adalah KI (37.2 ppm), Na2S203 (144.3 ppm) dan FeSO4 (498.6 ppm), sedang- kan vitamin yang ditambahkan adalah Vitamin B12 (101.5 tablet per kwintal). Ransum perlakuan terdiri 12 macam dan tiap perlakuan diulang sebanyak dua kali dengan se- puluh ekor ayam pada setiap ulangan. Untuk memperoleh data dilakukan pemotongan ayam pada umur enam minggu se- banyak 48 ekor yang diambil dari setiap ulangan sebanyak dua ekor. Pengaruh perlakuan diuji dengan sidik ragam dan dilanjutkan dengan uji ortogonal. Hasil penelitian menunjukkan bahwa banan ransum ber- pengaruh sangat nyata (P/ 0.01) terhadap persentase bo- bot karkas. Interaksi antara bahan ransum dan kadar pro- tein terlihat sangat nyata (P 1 0.01), dan dari uji orto- gonal terlihat adanya perbedaan antara bahan ransum ja- gung dengan ubi kayu pada kadar protein ransum 20 18 - persen (P0.01) sedangkan pada kadar protein 23- persen tidak ada perbedaan. Persentase bobot karkas 20 yang diperoleh berkisar antara 69 sampai 75 persen dari bobot hidup. Persentase bobot lemak abdomen yang diperoleh ber- kisar antara 1.98 sampai 3.07 persen. Hasil sidik ragam memperlihatkan bahwa bobot lemak abdomen ini tidak dipe- ngaruhi oleh perlakuan, tetapi dari uji ortogonal terli- hat adanya perbedaan bahan ransum jagung dengan ubi kayu pada kadar protein 20 18 persen (P0.05)....
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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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