Judul: Penentuan Komposisi Protein Putih Telur dari Beberapa Galur Ayam dengan Cara Elektroforesis SDS Gel
Abstrak: Telur ayam kampung diyakini memiliki keunggulan dibanding dengan telur ayam ras, walaupun secara ilmiah belum pernah dibuktikan. Oleh karena itu percobaan ini dirancang untuk melihat apakah ada perbedaan komponen protein putih telur antara ayam kampung dengan ayam ras.
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Judul: Profil Protein Putih Telur Unggas Dengan Metode SDS PAGE
Abstrak: Putih telur yang banyak digunakan dalam pengolahan pangan yaitu telur ayam ras, sedangkan pemanfaatan telur itik masih belum sebanyak telur ayam. Itik manila (Cairina moschata) dan itik alabio (Anas platyrhynchos borneo) banyak dipelihara sebagai penghasil daging dan telur. Pemanfaatan telur itik tersebut masih terbatas sebagai telur komersil dan telur tetas. Jenis telur unggas memiliki karakterisasi fraksi protein berbeda yang berperan terhadap sifat fungsional dan senyawa bioaktif yang dihasilkan. Penelitian ini bertujuan menganalisis fraksi protein putih telur dari ayam ras, itik manila, dan itik alabio. Hasil yang didapatkan dalam penelitian ini meliputi visualisasi fraksi protein dengan metode SDS-PAGE dan konsentrasi kuantitatif protein. Putih telur dari ketiga jenis unggas memiliki berat molekul protein yang serupa antara lain fraksi protein ovomucin sekitar 97 kDa, ovotransferin 70 kDa, dan lisozim 15 kDa. Hasil SDS PAGE protein putih telur dari ketiga jenis unggas memperlihatkan pemisahan fraksi protein dengan intensitas yang berbeda. Protein dominan yang teramati pada ayam ras yaitu ovabulmin dan lisozim. Ovotransferin dan ovomucin dominan terdapat pada itik manila, sedangkan itik alabio memiliki ovomucoid dominan. Konsentrasi protein putih telur total pada itik manila menunjukan nilai yang paling tinggi sebesar 16.03±0.67 mg mL-1, secara berturut-turut diikuti dengan itik alabio 14.31±0.60 mg mL-1 dan ayam ras 10.12±0.42 mg mL-1.
Keyword: putih telur, SDS PAGE, senyawa bioaktif, sifat fungsional

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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