Judul: Karakteristik Fisikokima Beras Analog dari Beberapa Varietas Ubi Jalar
Abstrak: Ketergantungan masyarakat Indonesia yang besar terhadap beras akan terus meningkat, sementara produksi beras memiliki keterbatasan. Sumber pangan lokal sebagai sumber karbohidrat pensubstitusi beras tersedia melimpah, di antaranya ubi jalar. Pengolahan ubi jalar menjadi bentuk produk mirip beras atau beras analog dapat mempromosikan konsumsi sumber pangan non-beras. Penelitian ini bertujuan untuk membandingkan mutu fisik dan kimia beras analog yang dibuat dari ubi jalar dari varietas yang berbeda (ubi jalar putih, ungu dan merah). Hasil analisis proksimat beras analog kadar air 8,82-12,09%, kadar abu 1,56-3,44%, kadar lemak 2,38-4,99%, kadar protein 5,19-6,18% dan kadar karbohidrat 87,86-89,03%. Aktivitas antioksidan beras analog berkisar 16,34-26,42%. Total fenolik yang terkandung pada beras analog sebesar 77,77-119,72 mg GAE/100 g. Kandungan antosianin beras analog berkisar pada 0,05-0,25 mg/100g. Beras analog ubi jalar memiliki warna merah-kuning. Densitas Kamba beras berkisar 0,49-0,55 g/mL dengan waktu pemasakan selama 4,4-5,2 menit.
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Judul: Pengembangan Beras Analog Ubi Jalar Ungu Sebagai Pangan Fungsional Tinggi Serat Dan Kaya Polifenol
Abstrak: Kemajuan zaman yang pesat membawa dampak pada perubahan pola hidup manusia salah satunya yaitu pola konsumsi makanan rendah serat. Kurangnya asupan serat memberikan dampak pada kesehatan misalnya gangguan pencernaan dan penyakit degeneratif sehingga dibutuhkan adanya inovasi produk pangan sumber karbohidrat yang tinggi serat. Beras analog merupakan salah satu dari inovasi tersebut. Beras analog dapat dibuat dari bahan yang memiliki kandungan serat tinggi, misalnya tepung ubi jalar ungu. Tepung jagung juga ditambahkan untuk menambah kandungan protein beras analog. Pengembangan beras analog ubi jalar ungu dilakukan dengan pencampuran tepung ubi jalar ungu dan tepung jagung yang akan menghasilkan dua formula. Kedua formula yang dipilih adalah formula dengan hasil uji organoleptik terbaik (F1) dan formula dengan kandungan ubi jalar ungu paling tinggi (F3), dimana kedua formula ini selanjutnya akan dianalisis karakteristik fisik dan kimianya. Hasil analisis densitas kamba kedua formula (F1 dan F3) adalah sebesar 0.55 g/ml dan 0.62 g/ml dan bobot seribu butir 11.84 gram dan 14.78 gram. Hasil analisis proksimat pada kedua formula mengandung kadar air 8.72 % dan 11.30 %, kadar abu 1.32 % dan 1.60 %, kadar lemak 0.77 % dan 0.58 %, kadar protein 4.37 % dan 3.80 %, dan kadar karbohidrat 84.80 % dan 82.70 %. Kandungan fenolik total kedua formula lebih tinggi apabila dibandingkan dengan beras sosoh, yaitu F1 sebesar 28.22 %, F3 sebesar 32.31 %, dan beras sosoh sebesar 4.12 %. Serat pangan kedua formula 8.27 % dan 9.50 %. Berdasarkan standar Kepala BPOM tahun 2011, kedua formula beras analog memenuhi kriteria untuk diklaim sebagai pangan “tinggi serat”.
Keyword: pangan fungsional, serat pangan, beras analog, ubi jalar ungu, tepung jagung.

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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