Judul: Pemberian ekstrak gambir (Uncaria gambir Roxb) sebagai antioksidan dalam air minum terhadap performa ayam petelur Isa Brown umur 40-43 minggu.
Abstrak: Gambir (Uncaria gambir Roxb) adalah salah satu tanaman herbal yang berpotensi sebagai sumber antioksidan alami. Penelitian ini bertujuan untuk mengevaluasi pengaruh pemberian ekstrak gambir terhadap performa ayam petelur. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 3 perlakuan dan 5 ulangan. Peubah yang diamati adalah konsumsi pakan, konversi pakan (FCR), produksi telur massa, profil darah (eritrosit, hematocrit, haemogobin, leukosit dan diferensiasi leukosit), konsentrasi MDA didalam plasma darah serta nilai IOFC (Income Over Feed Cost). Materi penelitian yang digunakan yaitu 90 ekor ayam petelur strain Isa Brown umur 40 minggu. Perlakuan yang diberikan adalah R0 = ransum control, R1= R0 + 20 mg kg-1 BB (Bobot Badan) ekstrak gambir dalam air minum, R2=R0+ 40 mg kg-1 BB ekstrak gambir dalam air minum. Hasil menunjukkan bahwa pemberian 20 mgkg-1 BB gambir dalam air minum meningkatkan persentase eosinofil secara signifikan (P<0.05). Perlakuan tidak mempengaruhi performa dan profil darah. Pemberian gambir (Uncaria gambir Roxb) dalam air minum dapat menurunkan konsentrasi MDA dalam darah. Penggunaan 20 mgkg-1 BB gambir dalam air minum dapat menurunkan tingkat stress oksidatif pada ayam petelur. Kesimpulan penelitian ini adalah gambir dapat digunakan sebagai sumber antioksidan untuk ayam petelur.
Keyword: ayam petelur, gambir, performa

Judul: Performa Puyuh (Coturnix-coturnix japonica) Periode Layer yang Diberi Ekstrak Gambir (Uncaria gambir Roxb.) dalam Pakan
Abstrak: Gambir adalah salah satu tanaman yang mengandung senyawa polifenol berupa katekin yang merupakan sumber antioksidan alami. Tujuan penelitian ini adalah untuk mengevaluasi pengaruh ekstrak gambir dalam pakan sebagai sumber antioksidan alami terhadap performa puyuh periode layer. Penelitian ini menggunakan 200 ekor puyuh yang dipelihara selama 6 minggu. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 5 perlakuan dan 4 ulangan. Peubah yang diamati adalah konsumsi pakan, produksi telur, produksi massa telur, bobot telur, mortalitas, konversi pakan, dan nilai Income Over Feed Cost (IOFC). Data yang diperoleh dianalisis menggunakan analysis of variance (ANOVA) dan uji duncan. Perlakuan yang diberikan adalah P0= ransum kontrol, P1= ransum kontrol+0.1% ekstrak gambir, P2= ransum kontrol+0.2% ekstrak gambir, P3= ransum kontrol+0.3% ekstrak gambir, P4= ransum kontrol+ antibiotik Bacitracin dalam air minum. Hasil menunjukkan bahwa penambahan ekstrak gambir 0.2% menunjukkan performa
Keyword: gambir, ayer, performa, puyuh

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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