Judul: Mempelajari Sifat Fisik dan Kimia Fermentasi dengan Starter ultur Lactobacillus plantaru
Abstrak: Sosis fennentasi merupakan salah satu produk olahan daging yang dibuat dengan melibatkan mikroorganisme, terutama mikroorganisme dari golongan bakteri asam laktat, yang dapat membantu proses fennentasi sehingga mampu meningkatkan daya tahan produk. Penelitian ini bertujuan untuk mempelajari sifat fisik dan kimia pada sosis ferulentasi yang dibuat dari daging dan lemak sapi, melalui evaluasi secara fisik seperti pengukuran nilai pH, aw, kadar air, wama dan tekstur. Evaluasi seem·a kimia meliputi kadar nitrit, as am laktat, protein dan lemak serta penilaian organoieptik melalui uji hedonik.
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Judul: Karakteristik kimia sosis fermentasi dengan kultur starter Lactobacillus plantarum dan Penicillium chrysogenum
Abstrak: Daging merupakan salah satu bahan pangan hasil ternak yang sangat penting bagi manusia untuk memenuhi kebutuhan protein hewani. Salah satu jenis olahan daging adalah sosis fermentasi. Penambahan kultur starter untuk menghasilkan sosis fermentasi merupakan usaha untuk memperbaiki kualitas. Bakteri asam laktat Lactobacillus plantarum dan kapang Penicillium chrysogenum dapat digunakan sebagai starter kultur pada sosis. Penelitian ini bertujuan untuk menghasilkan sosis fermentasi dengan penggunaan kultur starter bakteri asam laktat Lactobacillus plantarum yang dikombinasikan dengan kapang Penicillium chrysogenum dan untuk mengetahui karakteristik kimianya. an hanya untuk kepentingan pendidikan , penel elitian, penulisan k mich, penyusunan laporan pe karyo in Penelitian dilakukan di Bagian Ruminansia Besar Fakultas Peternakan dan Pusat Antar Universitas (PAU) pangan dan gizi IPB. Waktu penelitian berlangsung dari bulan Mei hingga bulan September 2004. Penelitian terdiri atas dua tahap yaitu penelitian pendahuluan berupa persiapan dan perbanyakkan starter kultur Lactobacillus plantarum dan Penicillium chrysogenum. Penelitian utama terdiri atas pembuatan sosis fermentasi serta analisa kimia. Parameter yang diamati meliputi nilai pH, total asam tertitrasi, aktivitas air (a), kadar air, kadar protein, dan kadar lemak, kadar abu dan kadar karbohidrat. Rancangan percobaan yang digunakan adalah rancangan acak lengkap (RAL) pola searah untuk analisa hasil pada masa sebelum penyimpanan, dan rancangan acak lengkap (RAL) pola faktorial untuk analisa hasil pada masa penyimpanan. Perlakuan yang diberikan adalah menggunakan kultur starter tunggal Lactobacillus plantarum dan menggunakan kultur starter kombinasi Lactobacillus plantarum dan Penicillium chrysogenum...
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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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