Judul: Karakterisasi Sifat Molekuler dan Fungsional Protein Kacang hijau (Phaseolus Aureus)
Abstrak: Konsentrat protein termasuk bahan yang dibutuhkan oleh Industri pangan di Indonesia. Sementara itu, kacang hijau sebagai salah satu sumber protein telah banyak dibudidayakan di negara ini. Kedua hal tersebut mendorong dilakukannya penelitian mengenai sifat protein kacang hijau yang dapat dimanfatkan dalam pembuatan produk pangan. Karakterisasi protein kacang hijau dilakukan dalam beberapa tahap. Pada awalnya biji kacang hijau ditepungkan dengan Willey mill lalu dihilangkan lemaknya. Tepung bebas lemak diisolasi proteinnya dengan pengendapan basa dan asam. Kadar protein tepung bebas lemak dan konsentrat diukur dengan metode Kjeldahl yang hasilnya berturut - turut adalah 24,29% dan 76,83%. Tepung bebas lemak dan konsentrat protein kacang hijau dianalisa komposisi as am aminonya dengan HPLC menggunakan pereaksi OP A. Asam amino yang mendominasi adalah asam glutamat, asam aspartat, dan leusin, baik untuk tepung bebas lemak maupun konsentrat protein.
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Judul: Karakteristik Sifat Molekuler dan Fungsional Protein dari Kacang Jogo (Phaseolus vulgaris)
Abstrak: Kacaug jog0 merupakan tanaman asli I~idoiiesia yailg meniiliki kadar protein yang cukup tinggi (22%). Sampai sekarang pemanfaatan kacang jogo ban1 terbatas pada konsumsi sehari-liari saja. Hal ini disebabkan masih niinininya pengetahuan niengenai sifat fungsional dari kacang jog0 tersebut. Penelitian ini bertujuan untuk mengisolasi protein dari kacang jogo. Isolat protein tersebut kemudian diteliti lebih lanjut untuk mendapatkan karakterisasi molekuler dan sifat fungsional dari isolat protein kacang jogo. Penelitian ini didahului dengan pembuatan isolat protein kacang jogo. Metode pembuatan isolat protein yang digunakan merupakan adaptasi metode pembuatan isolat protein kedelai. Dari pembuatan isolat protein, didapat kadar protein sebesar 72,05%. Rendalinya hasil ini disebabkan karena masih ada protein yang belum terekstrak di samping masih terdapalnya pengotor di dalam konsentrat protein yang didapat.
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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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