Judul: Mempelajari penggunaan tepung ubi kayu (Manihot utilisima Pohl) sebagai bahan dasar pembuatan Bahan Makanan Campuran (BMC)
Abstrak: Penelitian ini bertujuan membuat Bahan Makanan Campuran dari tepung ubi kayu, tepung kacang hi jau dan tepung ikan selar, mengetahui komposisi zat gizi dan mutu gizi dari Bahan Makanan Campuran yang dihasilkan, mengetahui kandungan energi dan protein dari hasil olahan bentuk kering dan basah serta daya terima konsumen terhadap hasil olahan tepung BMC. ...
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Judul: Penilaian mutu gizi bahan makanan campuran (BMC) untuk balita dengan bahan dasar ubi kayu dan daya terima konsumen terhadap produk olahannya
Abstrak: Penelitian ini bertujuan untuk mengkaji mutu biologi protein Bahan Makanan Campuran (BMC) yang terbuat dari tepung ubi kayu, tepung tempe, terigu, tepung kacang hijau, dan tepung kacang kedele dan mengetahui daya terima konsumen terhadap produk olahannya. Penelitian ini dilakukan di laboratorium Kimia Pangan dan Laboratorium Percoban Makanan, Jurusan GMSK, laboratorium Biokimia Pangan, jurusan TPG, dan Pusat Pengembangan Tekhnologi Pangan IPB, dari bulan Juli sampai bulan Desember 1993. Bahan yang digunakan dalam penelitian ini adalah ubi kayu, terigu, tempe, kacang hijau, kacang kedele, dan bahan-bahan untuk pembuatan produk. Alat yang digunakan adalah alat penepungan, alat untuk analisa kimia, alat untuk percobaan tikus, serta alat untuk pembuatan produk. Penelitian ini dilakukan dalam beberapa tahap, yaitu penepungan bahan baku utama BMC, penyusunan formula BMC dengan mengacu pada hasil penelitian Suharti (1991), yaitu formula STP yang terdiri dari tepung ubikayu-terigu-tempe dengan perbandingan 20-40-40, formula STH terdiri dari tepung ubikayu- terigu-tepung kacang hijau dengan perbandingan 20-35-45, dan formula STK terdiri dari tepung ubikayu- terigu-tepung kacang kedele dengan perbandingan 20-45-35, analisis kimia masing-masing formula, kemudian uji mutu biologis dengan percobaan tikus selama 10 hari. Tahap berikutnya adalah pembuatan produk (biskuit, bolu kukus, dan kue lapis) dan uji organoleptik terhadap warna, rasa, aroma, tekstur, dan rasa (untuk biskuit ditambah parameter kerenyahan) dengan 30 orang panelis, setelah itu dilakukan analisis zat gizi produk olahan terpilih.
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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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