Judul: Keberadaan Salmonella spp. pada telur ayam ras curah dan organik pada berbagai pasar di Dramaga Bogor
Abstrak: Salmonella merupakan bakteri patogen yang ditemukan dalam pangan dan dapat menyebabkan penyakit pada hewan dan manusia. Salmonella dapat hidup pada bahan pangan asal hewan seperti daging, susu, dan telur. Telur ayam merupakan bahan pangan penting yang dapat mencukupi kebutuhan protein individu. Salmonella dapat menyebabkan salmonellosis yang membahayakan bagi hewan dan manusia. Telur harus bebas Salmonella spp. agar dapat menjamin keamanan pangan bagi manusia. Tujuan penelitian ini adalah memberikan gambaran terhadap kualitas mikrobiologi telur ayam ras curah di warung, minimarket, supermarket dan telur ayam organik di supermarket di Dramaga Bogor terhadap pencemaran Salmonella spp. Metode yang digunakan pada penelitian ini mengacu pada SNI 2897:2008 mengenai metode pengujian cemaran mikroba dalam daging, susu, dan telur. Sampel telur ayam ras curah dari warung, minimarket, dan supermarket memperlihatkan hasil negatif terhadap Salmonella spp. Sampel telur ayam organik dari supermarket memperlihatkan hasil negatif terhadap Salmonella spp. Ditinjau dari kualitas mikrobiologisnya tidak terdapat perbedaan antara telur ayam ras curah dan telur ayam organik terhadap keberadaan Salmonella spp.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Egg, Salmonella spp, Organic egg, Foodborne disease, Salmonellosis

Judul: Isolasi dan Identifikasi Salmonella enteritidis pada Telur Saluran Pencernaan dan Feses Ayam Ras dari Peternakan Ayam Petelur di Gunung Sindur Bogor
Abstrak: Salmonella became a major cause of food poisoning. Several types of Salmonella could infect chicken as well as pig, cattle, egg and other fresh product. Poultry could be infected by several types of this bacteria. Adult laying hens infected by Salmonella may carry the organisme in their small intestines and shed it in their faeces, which may lead to contamination of the eggshell surface, alternatively contamination of the laid egg may occur in vivo through the dessemination of the organisme to the egg following localization and colonization of the small intestine by Salmonella, that is by transovarian transmision. Total 6 hens, 12 eggs, and 22 samples of faeces were test. From this case, we must give more our atention to Salmonella so this study evaluated the prevalence of Salmonella in different hatchery by applying Bacteriological Analitycal Methode (BAM) for isolation and identification of this bacteria. The test shown that just faeces from Farm A which were contaminated by Salmonella. Test were not found all kind of species Salmonella in egg and gastrointestine
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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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