Judul: Residu Antibiotika Dalam Ayam Pedaging yang diberi Dosis Pengobatan Spiramisina
Abstrak: Tujuan penelitian ini adalah untuk mendeteksi kadar residu spiramisina pada plasma, daging, hati dan ginjal dan untuk menentukan waktu henti spiramisina pada ayam broiler setelah pengobatan. Spiramisin diberikan kepada ayam broiler umur lima minggu melalui air minum dengan dosis pengobatan 400 mg per literlekorlhari selama tiga hari berturut-turut. Ayam dipotong setiap hari mulai dari hari pertama sampai dengan hari ke-20 setelah pengobatan terakhir. Konsentrasi spiramisina dalam plasma, daging, hati dan ginjal ditentukan dengan metoda Cawan silinder (cup plate method) menggunakan bakteri Micrococcus luteus ATCC 9341. Dalam penelitian ini residu spiramisina masih dapat dideteksi pada plasma, daging, hati dan ginjal berturut-turut sampai dengan hari ke- 2, 12, 14 dan 15 setelah pengobatan terakhir. Kadar terendah spiramisina yang terdeteksi pada penelitian ini adalah 0,0412 µglml dalam plasma, 0,0376 µgig dalam daging, 0,0389 µgig dalam hati dan 0,0391 µgig dalam ginjal, sedangkan batas maksimum residu spiramisina yang diperbolehkan pada unggas adalah 0, 1 µgig.
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Judul: Kajian Residu Antibiotik pada Paha dan Hati Ayam serta Persentase Organ Dalam akibat Pemberian Pakan Komersil dengan Waktu Henti Berbeda
Abstrak: Residu antibiotik adalah senyawa asal atau metabolitnya yang terdapat dalam jaringan produk hewani. Penelitian ini bertujuan untuk menguji persentase organ dalam dan ada tidaknya residu antibiotik pada paha dan hati akibat pemberian dua pakan komersil dengan waktu henti yang berbeda pada ayam broiler. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 6 perlakuan dan 3 ulangan. Peubah yang diamati adalah keberadaan residu antibiotik pada paha dan hati ayam dan persentase organ dalam. Penelitian menggunakan 200 ekor ayam broiler strain CP 707 Arbor Arcres dengan umur 1 hari ( DOC ) dan analisis residu menggunakan 18 ekor ayam broiler dengan umur 35 hari. Perlakuan yang diberikan P1= pakan A (35 hari), P2 = pakan B (35 hari), P3 = P1 diganti pakan basal+probiotik (7 hari terakhir), P4 = P2 diganti pakan basal+probiotik (7 hari terakhir), P5 = P1 diganti pakan basal+probiotik (3 hari terakhir), P6 = P2 diganti pakan basal+probiotik (3 hari terakhir). Hasil penelitian menunjukan bahwa setiap golongan antibiotik memiliki waktu henti yang berbeda untuk menghilangkan residu antibiotik pada hati dan paha ayam. Perlakuan pada penelitian ini tidak mempengaruhi persentase organ dalam.
Keyword: antibiotik, residu antibiotik, organ dalam ayam

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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