Judul: Pengaruh Glazing dan Lama Penyimpanan terhadap Mutu Ikan Kembung (Rastrelliger sp ) Beku
Abstrak: Tujuan penelitian ini adalah untuk mengetahui pengaruh glazing terhadap mutu Ikan Kembung (Restrellinltr. sp) beku selama penyimpanan beku, pengaruh lama penyimpanan beku terhadap mutu Ikan Kembung (Rastrellirrey sp) beku serta pengaruh interaksi antara perlakuan glazing dengan lama penyimpanan beku terhadap mutu Ikan Kembung (Rastrelliney sp) beku.
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Judul: Pengaruh jenis pengemas, suhu pembekuan dan lama penyimpanan terhadap mutu udang kering - beku ( freeze - dried shrimp )
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh je- nis pengemas, sunu pembekuan dan lama penyimpanan terhadap mutu udang kering-beku yang dihasilkan. Rancangan percobaan yang digunakan adalan rancangan acak lengkap pola faktorial uengan qua mail ulangan. Per- lakuan yang diterapkan meliputi jenis pengemas (rolyethylene dan Folypropylene), sunu pembekuan (-20, -10 aan -5°C) aan lama penyimpanan (0, 4 aan 8 minggu). Pengamatan meliputi rasio rehidrasi, kadar air, kadar protein aan organoleptik (tekstur, warna, flavour, penampakan dan penerimaan) setelan udang kering-beku direhiurasi. Hasil penelitian menunjukkan bahwa sunu pembekuan ber- pengaruh terhadap rasio renidrasi, kadar air, flavour, pe- nampakan dan penerimaan, tetapi kurang berpengarun ternauap tekstur uan warna. Jenis pengemas berpengarun terhauap kauar uir, sedang- kan lama penyimpanan berpengaruh terhadap rasio reniarasi dan kadar air. Rasio rehiarasi tertinggi (0,9700) dicapai pada inter- aksi antara perlakuan suhu pembekuan -10 °C uan lama pe- nyimpanan O minggu, sedangkan rasio reniurasi yang terendah (0,9125) dicapai pada interaksi antara perlakuan sunu pem- bekuan -10 °C dan lama penyimpanan 8 minggu. Kadar air tertinggi (10,8583) aicapai pada interaksi antara perlakuan jenis pengemas Polyethylene aan lama po- nyimpanan 8 minggu. Suhu pembekuan -5°C memberikan kauur air yang relatif lebih tinggi dibandingkan dengan sunu pom- kuan -10 dan -20 °C. Kadar protein tertinggi (71,6520) dicapai pada inter- aksi antara perlakuan sunu pembekuan -10°C dan sama penyim- panan 4 minggu, sedangkan yang terenuah (69,4850) aicapai pada interaksi antara perlakuan suhu pembekuan -5 °C dan lama penyimpanan O minggu. Nilai pengamatan organoleptik berfluktuasi, namun flux- tuasi tersebut masin diatas ambang batas penerimaan. Umim- nya interaksi antara perlakuan jenis pengemas uan lama pe nyimpanan berpengaruh terhadap nilai organoleptik, kecuali tekstur udang kering-beku setelah direniurasi….
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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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