Judul: Hubungan antara jumlah sel somatis dlam susu kandang dengan mastitis subklinis dan produksi susu
Abstrak: Penelitian ini bertujuan untuk mengetahui hubungan antara jumlah sel somatis dalam susu kandang dengan masitis subklinis serta kaitannya dengan produksi susu. Pemeriksaan jumlah sel somatis dilakukan secara langsung dan tidak langusng. Secara langsung menggunakan metode Breed dan cara tidak langsung menggunakan IPB-1. Penelitian ini dilaksanakan di Laboratorium Kesehatan Masyarakat Veteriner, Fakultas Kedokteran Hewan, Institut Pertanian Bogor dan pengambilan sampel dilakukan di kawasan usaha peternakan (KUNAK), Cibungbuang, Bogor. elain itu dilakukan juga pengambilan data produksi susu per kandang melalui pengisian kuesioner terhadap 45 peternak yang dijadikan sampel pada penelitian ini.
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Judul: Penelitian Pendahuluan Perbandingan Tiga Metode untuk Mendiagnosa Mastitis Subklinis dan Hubungannya terhadap Penurunan Produksi Susu
Abstrak: Penelitian ini dilakukan di Perusahaan Peternakan Pati, Jawa Tengah, mulai tanggal 12 Mei sampai 12 Juni 1984, dan di Laboratorium Kesehatan masyarakat Veteriner Fakultas Kedokteran Hewan, Institut Pertanian Bogor , mulai tanggal 12 Juni sampai 31 Juli 1984. Tujuan penelitian ini adalah untuk mengetahui metode yang lebih efektif dan efisien dalam mendiagnosa mastitis subklinis pada sapi perah, sehingga nantinya diharapkan dapat digunakan peternak dalam usaha mencegah timbulnya kerugian akibat mastitis. Selain itu penelitian ini juga bertujuan untuk mengetahui gambaran mengenai penurunan produksi susu dari sapi-sapi yang menderita mastitis subklinis. Pada Penelitian ini digunkan 81 contoh susu kuartir yangt diambil pada setiap pemerahan pagi. Contoh susu ini berasal dari 22 ekor sapi perah fries holland yang sedang Isotasi antara bulan ketiga sampai bulan keenam. Metode untuk mendiagnosa masitis subklinis yang digunakan dalam penelitian ini adalah California Mastitis Test (CMT) Aulendorfer Mastitis Probe (AMP), AHI Mastitis Detector (MD) dan Breed.
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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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