Judul: Efektivitas Ekstrak daun Jambu Biji (Psidium guajava L.) Sambiloto (Andrographis paniculata (Burm.F.) Nees) dan Sirih (Piper betle L.) terhadap Infeksi Bakteri Aeromonas hydrophila pada Ikan Patin (Pangasius hypophthalmus
Abstrak: lkan patin (Pangasius hypophthalmus) di lndonesia mempunyai prospek yang baik dalam pemasaran baik dalam ukuran benih sebagai ikan hias maupun pada ukuran dewasa untuk konsumsi. Permasalahan yang sering muncul dalam budidaya adalah timbulnya penyakit, salah satunya adalah serangan penyakit MAS (Motile Aeromonad Septicaemia) yaitu bakteri Aeromonas hydrophila.
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Judul: Efektivitas Ekstrak Daun Jambu Biji (Psidium Guajava L.)Sambiloto (Andrographis Paniculata Nees) Dan Daun Sirih (Piper Betle L.) Terhadap Infeksi Bakteri  (Aeromonas Hydrophila L31, Pada Ikan Lele Dumbo (Clarias Sp.)
Abstrak: Ikan lele dumbo (Clarias sp.) disukai oleh masyarakat karena rasa dagingnya yang lezat dan gurih, di samping harganya relatif murah dibandingkan jenis ikan lainnya. Hal tersebut menyebabkan permintaan terhadap ikan lele durnbo meningkat, dan mendorong para petani ikan untuk mengintensifkan budidayanya. Namun intensifikasi sering menghadapi kendala salah satunya adalah penyakit. Penyakit yang sering ditemukan pada lele dumbo adalah MAS (Motile Aeromonad Septicaemia) yang disebabkan oleh bakteri Aeromonas hydrophila. Penanggulangan penyakit yang disebabkan bakteri A. hydrophila biasanya menggunakan antibiotik. Namun dipihak lain pemakaian antibiotik pada budidaya akan meningkatkan fiekuensi isolat bakteri yang resisten terhadap antibiotik tersebut. Indonesia kaya akan tanaman yang berpotensi sebagai obat, seperti daun jambu biji (Psidium guajava L.), sambiloto (Andrographis paniculata Nees), dan daun sirih (Piper betle L.). Dari penelitian-penelitian yang telah dilakukan diketahui bahwa tanaman obat tersebut memiliki khasiat sebagai antibakteri. Penelitian ini bertujuan untuk mengetahui keefektifan tanaman obat tersebut untuk pencegahan dan pengobatan penyakit MAS (Motile Aeromonad Septicemia) pada ikan lele dumbo (Clarias sp.) yang terinfeksi bakteri bakteri A. hydrophila L ~ I . Penelitian dilaksanakan pada bulan April sampai Juli 2001, di Laboratorium Kesehatan Ikan, Jurusan Budidaya Perairan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor, Kampus Darmaga, Bogor.
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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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