Judul: Bungkil kacang tanah dalam ransum ayam broiler ditinjau dari kandungan
Abstrak: Tujuan penelitian ialah untuk menentukan cendawan dengan spesiesnya yang tumbuh pada bungkil kacang tanah yang menghasilkan aflatoksin dan persentase peoggunaan bungkil kacang tanah dalam ransum ditinjau dari segi aflatoksinnya serta pengaruhnya terhadap pertumbuhan ayam broiler. Penelitian ini terditi atas dua tahap yaitu penelitian pertama dan penelitian akhir.
Keyword: 

Judul: Performa Ayam Broiler yang Diberi Ransum Mengandung Aflatoksin dengan Level Berbeda
Abstrak: Pakan merupakan salah satu faktor penting dalam upaya pengembangan peternakan. Pakan ternak mudah rusak sehingga dapat menurunkan mutu pakan. Salah satu faktor yang mempengaruhi mutu pakan adalah infeksi kapang pada pakan maupun bahan penyusun pakan. Kapang yang banyak mencemari pakan dan bahan penyusun pakan diantaranya adalah Aspergillus flavus dan Aspergillus parasiticus. Kedua spesies kapang tersebut merupakan kapang yang menghasilkan senyawa metabolit sekunder berupa aflatoksin. Aflatoksin dapat memberikan efek negatif pada pertumbuhan ternak, dan bila dikonsumsi dalam dosis tinggi aflatoksin pada pakan dapat menyebabkan kematian. Tujuan penelitian ini adalah untuk mengetahui pengaruh level aflatoksin dalam pakan terhadap performa ayam broiler. Penelitian ini dilaksanakan dari bulan Februari sampai dengan Mei 2010, di Laboratorium Ilmu dan Teknologi Pakan dan Laboratorium Lapang Ilmu Nutrisi Unggas Kandang C. Rancangan percobaan yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap yang terdiri dari 6 perlakuan dan 4 ulangan. Perlakuan yang diberikan adalah R1 = Ransum basal mengandung 12 ppb aflatoksin (starter) dan 13 ppb aflatoksin (finisher); R2 = Ransum basal mengandung 53 ppb aflatoksin (starter) dan 57 ppb aflatoksin (finisher); R3 = Ransum basal mengandung 94 ppb aflatoksin (starter) dan 101 ppb aflatoksin (finisher); R4 = Ransum basal mengandung 136 ppb aflatoksin (starter) dan 146 ppb aflatoksin (finisher); R5 = Ransum basal mengandung 177 ppb aflatoksin (starter) dan 191 ppb aflatoksin (finisher); dan R6 = Ransum komersil. Peubah yang diamati adalah konsumsi pakan, pertambahan bobot badan, konversi pakan dan mortalitas ayam broiler.
Keyword: Aspergilus flavus, Aspergillus paraciticus, aflatoxins level, broiler performance, Completely Random Design, feed consumption, body weight gain

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.
Keyword: