Judul: Isolasi dan karakterisasi sifat fisik, kimia, dan fungsional pati  gayam (Inocarpus edulis Forst.)
Abstrak: Informasi dasar mensenai biji gayam (Inocarpus edulis Forst.), salah satu jenis legum domestik, masih sangat sedikit, khususnya mengenai pati gayam. Oleh karena itu perlu dilakukan penelitian untuk mengetahui karakteristik pati gayam dalam rangka pemanfaatan biji gayam. Pengamatan yang dilakukan mencakup: (1) struktur anatomi buah gayarn serta sifat fisik dan kimia biji gayam, (2) karakteristik fisik dan kirnia granula pati gayam, (3) karakteristik pembentukan pasta dan gel pati gayam, serta (4) daya cerna pati gayam. Cara isolasi pati gayam dikembangkan dari cara isolasi pati jagung.
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Judul: Sifat-sifat Fisiko Kimia Pati Beberapa Varietas Unggul Jagung (Zea Mays L.)
Abstrak: Tujuan dari penelitian ini adalah untuk mempelajari sifat-sifat fisik dan kimia pati dari tiga varietas unggul jagung yaitu varietas Arjuna, Bromo dan Kalingga, sehingga dapat dijadikan informasi dasar yang diperlukan bagi pengo- lahan pangan yang menggunakan pati jagung sebagai salah sa- tu bahan mentahnya. Rata-rata rendemen pati jagung yang diperoleh dari ketiga varietas ini adalah 39,81 persen (berdasarkan berat kering). Secara statistik, varietas mempengaruhi tiga parameter 1 yang dianalisa, yaitu kadar air, derajad putih dan suhu gelatinisasi. Sedangkan ekstraksi lemak berpengaruh terhadap semua parameter kecuali densitas kamba. Ekstraksi lemak akan meningkatkan nilai kadar air (dari 6,46 menjadi 10,91 persen berat kering), kadar amilosa (30,44 menjadi 37,48 persen berat kering), derajad putih (86,24 menjadi 91,33), viskositas balik pasta (598 BU men- jadi 775 BU) serta kekerasan (10,94 x 103 menjadi 26,59 x 103 dyne/cm²) dan daya tahan pecah gel pati (1,21 x 107 menjadi 2,375 x 107 erg/cm²). Tetapi perlakuan ini akan menurunkan suhu gelatinisasi (69,87°C menjadi 67,25°C), viskositas puncak (848,33 BU menjadi 635 BU) dan konsisten- si amilografi (1010 BU menjadi 848,33 BU). Densitas kamba tidak dipengaruhi oleh ekstraksi lemak (rata-rata 0,50 gram/ ml). Hasil pengamatan di bawah mikroskop menunjukkan bahwa granula pati jagung berbentuk poligonal dan pada keadaan sinar terpolarisasi menunjukkan sifat birefringent yang akan hilang pada saat pasta pati mencapai puncak viskositas- nya (saat granula pati mulai pecah). Penyimpanan gel pada suhu rendah (4°C) akan meningkatkan nilai kekerasan (dari 14,725 x 103 menjadi 22,81 x 103 dyne/cm²) dan daya tahan pecah gel pati (dari 1,66 x 107 menjadi 1,97 x 107 erg/cm²)…
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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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