Judul: Patogenisitas Daun Gamal (Gliricidia sepium (Jacq.) Steud. Terhadap Pertumbuhan dan Perfonna Beberapa Organ Dalam Mencit Putih (Mus musculus L. Strain Albino).
Abstrak: Gamal dalam bahasa latin disebut Gliricidia sepium merupakan tanaman leguminosa pohon di daerah tropis yang pertumbuhannya cepat. Tanaman gamal yang berasal dari Amerika Tengah merupakan salah satu jenis tanaman yang dapat digunakan sebagai sumber hijauan untuk pakan ternak ruminansia. Selain itu, tanaman gamal dapat digunakan sebagai tanaman pagar, tanaman pelindung, pupuk hijau, kayu bakar, pencegah erosi, dan obat penyakit kulit.
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Judul: Teknik Penyimpanan Stek Batang Gamal (Gliricidia sepium) untuk Penanaman : Media dan Lama Penyimpanan serta Zat Pengatur Tumbuh
Abstrak: Gamal (Gliricidia sepium) merupakan tanaman yang memiliki banyak manfaat baik secara ekologi maupun ekonomi. Gamal memiliki potensi besar untuk dikembangkan sebagai bahan baku energi baru dan terbarukan di Indonesia. Berdasarkan hal tersebut dibutuhkan penyediaan bibit gamal dalam jumlah besar. Tujuan penelitian ini adalah menganalisis pengaruh media simpan dan lama penyimpanan serta zat pengatur tumbuh terhadap pertumbuhan stek batang gamal. Penelitian dilaksanakan di Taman Hutan Kampus Institut Pertanian Bogor (IPB) dengan menggunakan Rancangan Acak Lengkap (RAL) faktorial yang terdiri dari tiga faktor perlakuan yakni media simpan, lama penyimpanan, dan zat pengatur tumbuh. Hasil penelitian menunjukan faktor interaksi antar perlakuan tidak memberikan pengaruh nyata pada setiap parameter yang diuji. Perlakuan media simpan secara tunggal juga tidak memberikan pengaruh nyata, sedangkan perlakuan lama penyimpanan dan zat pengatur tumbuh memberikan pengaruh nyata terhadap parameter persentase berakar, persentase bertunas, dan panjang akar. Stek batang gamal memiliki pertumbuhan terbaik dengan lama penyimpanan 2 pekan dan 4 pekan serta dengan menggunakan zat pengatur tumbuh Rootone F.
Keyword: Gliricidia sepium, penyimpanan, stek batang, zat pengatur tumbuh

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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