Judul: Analisis residu antibiotik (Oksitetrasiklin) pada udang akibat perlakuan sebelum proses pengolahan
Abstrak: Salah satu penyebab terjadinya penolakan terhadap produk ekspor udang adalah ditemukannya antibiotik pada tubuh udang dalam jumlah yang cukup tinggi. Antibiotik yang terdapat pada tubuh udang berasal dari pakan yang diberikan selama udang dibudidayakan di dalam tambak. Pada penelitian ini, proses penetrasi antibiotik ke dalam tubuh udang dilakukan dengan cara perendaman udang di dalam larutan antibiotik (Oksitetrasiklin) dengan konsentrasi 100 ppm. Bahan baku yang telah mengalami perlakuan tersebut, dipisahkan menjadi enam bagian, yaitu untuk perlakuan pencucian (A), penyimpanan dalam suhu kamar selama 5 jam (B), penyimpanan pada suhu 4 °C selama 5 jam (C), penyimpanan pada suhu 0 °C selama 24 jam atau 1 hari (D), perebusan selama 5 menit (E), dan sebagai kontrol (0). Analisa yang dilakukan pada sampel menggunakan HPLC (High Performance Liquid Chromatography), TLC (Thin Layer Chromatography), dan Spektrofotometer Infra Merah (Infra Red). Hasil yang diperoleh dari identifikasi menggunakan TLC, menunjukan bahwa terbentuknya beberapa senyawa lain dengan BM yang lebih besar jika dibandingkan dengan standar antibiotik Oksitetrasiklin. Senyawa-senyawa tersebut diduga ...
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Judul: Analisis Residu Antibiotika Tetrasiklin dalam Susu Bubuk yang Diimpor melalui Pelabuhan Laut Tanjung Priok
Abstrak: Using antibiotics in dairy farm are popular for therapy or applied as a stimulant growth. However, the presence of antibiotic residue in milk causes harmful effects on consumer's health. Tetracycline is one of the antibiotic used in an effort to improve the health of livestock, especially in disease treatment. The aim of this research was to analyze tetracycline residue in imported milk powder. Sixty imported milk powder samples were collected at Tanjung Priok Sea Port. All samples were tested using enzym linked immunosorbent assay (ELISA) as a screening test and the result showed 8 out of 60 samples (13.33%) were positive of tetracycline residue. Eight samples which were positive determined by ELISA then were confirmed by high performance liquid chromatography (HPLC) method. Five of the 8 samples contained tetracycline residue in the confirmation method. Five samples contained tetracycline residue in a high concentration, which was above the maximum residue limit according to the National Standardization Agency of Indonesia.
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Judul: Utilization of terra/MODIS L1B data for analysis of horizontal wind profile in the troposphere
Abstrak: This study was concerned with horizontal wind derived from data collected with the Moderate-resolution Imaging Spectroradiometer (MODIS) on board the NASA’s Earth Observation System (EOS)-Terra satellite. The aim of this study is to develop a method for the estimation of horizontal wind movement in the troposphere based on Navier-Stokes equation. The method was applied to a calibrated and geolocated Terra/MODIS L1B 1 km data set. The data inputs to estimate surface temperature are retrieved from TIR (Thermal Infrared) bands 31 (10.780 μm to 11.280 μm) and 32 (11.770 μm to 12.270 μm). The obtained surface temperatures were later used to approximate geopotential height on a constant-pressure surface by using the modified Poisson equation. The main assumptions used are the hydrostatic equilibrium, ideal gas law, constant lapse rate and constant acceleration of gravity. Based on the distribution of geopotential height, the pressure gradient force is measured by the gradient of geopotential on an isobaric coordinate to present the horizontal wind profile. For certain topographic areas especially in the mountain ranges, there was a disadvantage of using pressure as a vertical coordinate which lead to inaccuracy. In spite of that, Terra/MODIS L1B data with 1 km spatial resolution can be used to estimate the horizontal wind movement in the troposphere.
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