Judul: Mempelajari Kadar Mineral Dan Logam Berat Pada Komoditi Sayuran Segar Di Beberapa Pasar Di Bogor.
Abstrak: Sayuran segar adalah bahan pangan yang banyak mengandung vitamin dan mineral yang penting, namun rantai pemasarannya relatif panjang, maka keamanan pangan dan pengawasan mutu dari produk sayuran saat sampai di tingkat pedagang pengecer tidak terperhatikan. Oleh karena itu, penelitian itu dilakukan dengan tujuan menganalisa kadar mineral dan cemaran logam berat pada sayuran segar dan mengamati keamanan pangan produk sayuran. Prinsip dari analisa ini adalah mengukur mineral dan kandungan cemaran logam berat pada sampel sayuran, yaitu kangkung,untuk kontrol diambil di daerah perkebunan Ciomas, bayam, untuk kontrol diambil di daerah perkebunan Ciapus, kol, untuk kontrol diambil di daerah perkebunan Cipanas, selada, untuk kontrol diambil di daerah perkebunan Cipanas dan daun singkong, untuk kontrol diambil dari daerah perkebunan Sindang Barang. Dimana kelima sampel sayuran tersebut juga diambil dari kelima pasar di daerah Bogor yang disurvei, yaitu Pasar Bogor, Pasar Anyar, Pasar Merdeka, Pasar Gunung Batu dan Pasar Leuwiliang. Untuk persiapan sampel digunakan metode pengabuan basah lalu kadamya dianalisa dengan spektrofotometer serapan atom (AAS).
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Judul: Cemaran logam berat timbal Pb pada buah anggur yang dijual di tepi jalan raya di Kota Bogor
Abstrak: Tujuan umum penelitian ini adalah untuk mengetahui tingkat cemaran logam berat (timbal) pada buah anggur yang dijual di tepi jalan. Adapun tujuan khususnya untuk (1) mengetahui tingkat kesadaran pedagang yang berjualan di tepi jalan terhadap bahaya cemaran timbal, (2) mengetahui tingkat cemaran logam berat timbal pada buah anggur yang dijual di tepi jalan kota Bogor, (3) mengetahui pengaruh lamanya penyimpanan buah anggur terhadap kadar cemaran logam berat timbal, dan (4) mengetahui pengaruh pencucian buah anggur terhadap kadar kontaminasi logam berat timbal. Penelitian dilakukan selama bulan Februari 2004 sampai dengan bulan April 2004 di ruas jalan kota Bogor, yaitu di jalan Jembatan Merah, Sukasari dan Gunung Batu. Pemilihan lokasi (ruas jalan) dilakukan secara purposive didasarkan pada tingkat kepadatan lalu lintas yang paling tinggi di kota Bogor, serta terdapat sejumlah pengecer buah yang berjualan di tepi jalannya. Dari pengecer tersebut dikumpulkan informasi meliputi keadaan umum lokasi, karakteristik dan kebiasaan pedagang melalui kuesioner, serta diambil buah anggur sebagai contoh untuk dianalisa kadar timbalnya.
Keyword: buah anggur

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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