Judul: Pengamatan kualitas susu pasteurisasi di DKI Jakarta, Bogor dan Bandung
Abstrak: Susu pasteurisasi adalah produk olahan susu yang mempunyai bentuk dan rasa seperti susu segar dengan masa simpan lebih lama. ...
Keyword: Milk, Pasteuration

Judul: Inspection of Milk Quality from Milk Shops in the Student Settlement Areas of IPB Dramaga and Cilibende
Abstrak: Susu merupakan sumber pangan hewani yang berperan dalam kehidupan manusia karena mengandung berbagai komponen gizi. Indonesia memiliki tingkat konsumsi susu masih tergolong rendah. Sebagai salah satu upaya untuk meningkatkan konsumsi susu, berbagai macam produk olahan susu dengan aroma dan bentuk yang lebih “kekinian” dibuat. Namun, jaminan terhadap kualitas produk olahan susu yang dijual tidak semua diketahui. Penelitian ini bertujuan untuk mengetahui kualitas sampel susu yang diperoleh dari kedai susu yang berada di sekitar kawasan permukiman mahasiswa kampus Institut Pertanian Bogor Dramaga dan Cilibende. Total sampel susu yang dibeli dari 13 kedai susu di lokasi penelitian sebanyak 39 sampel berupa susu plain tanpa tambahan pemanis, perasa ataupun es batu. Berdasarkan uji Kesempurnaan Pasteurisasi dan Sterilisasi dapat diketahui bahwa seluruh sampel merupakan susu pasteurisasi, bahkan 30.8% merupakan susu sterilisasi. Hasil uji komposisi dan uji pH menunjukkan nilai rata-rata berat jenis, kadar lemak, kadar protein, kadar laktosa, bahan kering, bahan kering tanpa lemak dan pH sampel susu daerah Dramaga secara berturut-turut adalah 1.0190 g/mL, 2.66%, 2.02%, 3.03%, 8.18%, 5.52% dan 6.89, sedangkan sampel susu daerah Cilibende adalah 1.026 g/mL, 3.80%, 2.75%, 4.13%, 11.34%, 7.54% dan 6.54. Berdasarkan hasil penelitian ini dapat disimpulkan bahwa kualitas dari susu siap minum yang dijual di kedai sekitar permukiman mahasiswa Institut Pertanian Bogor kurang baik karena tidak memenuhi syarat standar minimum SNI No. SNI 01-3951-1995 tentang Susu Pasteurisasi.
Keyword: IPB University, milk, pasteurized, quality

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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