Judul: Pembuatan protein konsentrat wheat pollard sebagai pemanfaatan hasil samping penggilingan gandum
Abstrak: Salah satu sumber protein yang belum dimanfaatkan di Indonesia saat ini adalah dedak gandum. Dedak gandum merupakan hasil samping dari proses penggilingan gandum yang mempunyai kandungan gizi yaitu kandungan protein lebih tinggi dari tepung terigu. Kandungan protein dari dedak gandum adalah 17.68% sedangkan tepung terigu berkisar antara 12 - 13% (keduanya merupakan berat kering). Maka di dalam penelitian ini akan dikaji pembuatan protein konsentrat dari dedak gandum (wheat pollard). Pembuatan protein konsentrat dapat dilakukan dengan menggunakan metode ekstraksi basa dan hidrolisis secara enzimatis. Hasil yang diperoleh dari kedua metode ini akan dibandingkan untuk menentukan hasil yang terbaik...
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Judul: Ekstraksi Germ Gandum sebagai Konsentrat Protein untuk Fortifikasi Protein Tepung Lokal
Abstrak: Germ gandum memiliki kandungan protein yang tinggi, sehingga potensial untuk jadikan produk fortifikan protein berupa konsentrat untuk meningkatkan kualitas protein tepung lokal. Tujuan penelitian ini yaitu untuk mengetahui pengaruh faktor pH (A) dan waktu ekstraksi (B) dalam menghasilkan konsentrat protein dari germ gandum dan terhadap karakteristik sifat fisikokimia konsentrat protein yang dihasilkan dengan menggunakan Rancangan Acak Lengkap (RAL) Faktorial serta mengidentifikasi kandungan asam amino konsentrat protein germ gandum. Tahapan penelitian ini meliputi karakterisasi germ gandum, proses isolasi protein, dan karakterisasi konsentrat protein germ gandum. Ekstraksi dilakukan dalam keadaan basa dengan perlakuan pH pada 8.5-10.5 dengan waktu ekstraksi selama 2.5 jam-3.5 jam. Hasil penelitian menunjukkan bahwa rendemen tertinggi konsentrat protein germ gandum diperoleh pada kondisi pH 9.5 dan waktu 3.5 jam. Namun rendemen tertinggi tidak berbanding lurus dengan tingginya kadar protein yang terekstrak. Kondisi pH 10.5 dan waktu ekstraksi 3.5 jam memiliki kadar protein tertinggi. Berdasarkan hasil karakterisasi konsentrat protein germ gandum, diketahui bahwa semakin tinggi pH dan waktu ekstraksi meningkatkan kadar protein dan aktivitas emulsi. Asam amino esensial tertinggi yang terkandung dalam konsentrat protein germ gandum yaitu arginin dan asam amino non esensial tertinggi yaitu asam glutamat. Berdasarkan metode CPI, perlakuan terbaik diperoleh pada kombinasi perlakuan dengan pH 9.5 dan waktu 3.5 jam.
Keyword: ekstraksi, fortifikasi, konsentrat protein, germ gandum

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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