Judul: Analsis Residu Antibiotika dalam Daging Sapi yang Diimpor melalui Pelabuhan Tanjung Priok
Abstrak: Antibiotics are natural products of a microorganism, identical synthetic products or similar semi synthetic products that inhibit the growth of or destroy microorganisms. In veterinary medicine antibiotics are used for therapeutic, prophylactic, metaphylactic and nutritive purposes. The presence of antibiotics or their metabolites in food is potentially hazardous to health as it may cause allergic reactions in people and antibiotic resistance in pathogenic microorganisms. In addition antibiotics may influence starter cultures in food industry and lead to economic damage. The aims of this research were to detect antibiotic residue in imported beef and to analyze the effectivenes of rapid test as screening method to detect antibiotic residue in imported beef as a part of quarantine inspection. Samples size was calculated using detect disease formula and selected by random sampling. Datas regarding the proportion of antibiotic positive samples were analyzed descriptively. Rapid test showed that, 24 of the 70 samples (34.29%) contained antibiotic residue, while 17 (24.29%) samples contained antibiotic residue detected by using bioassay. Bioassay showed that samples contained beta lactams, tetracycline, macrolide, and aminoglycoside.
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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: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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