Judul: Identifikasi jumlah sel hidup Staphylococcus aureus dalam toge goreng yang dijajakan pedagang di Kotamadya Bogor
Abstrak: Tujuan dari penelitian ini adalah untuk mengetahui mutu mikrobiologi toge goreng yang dijajakan pedagang di Kotamadya Bogor melalui penghitungan jumlah sel hidup S. aureus, pengukuran pH dan suhu pengolahan serta mempelajari kondisi higiene dan sanitasi yang mempengaruhi jumlah sel hidup S. aureus dalam toge goreng. Penelitian dilaksanakan pada bulan April sampai Mei 1996. Pengujian kandungan sel hidup S. aureus dilakukan di Laboratorium Kesehatan Masyarakat, Jurusan Gizi Masyarakat dan Sumberdaya Keluarga, Fakultas Pertanian, Institut Pertanian Bogor. Unit contoh yang diambil adalah sebanyak 10 pedagang yang dipilih secara acak. Contoh toge goreng diambil pada pagi hari saat mulai dijajakan dan pada siang hari saat dijajakan. Data yang diperoleh dianalisis dengan menggunakan analisis deskriptif dan analisis regresi.
Keyword: S. aureus, toge goreng

Judul: Idetifikasi Cemaran Bakteri Staphylococcus aureus Pada Daging Ayam yang di Jual di Pasar Tradisional dan Modern di Sekitar Kampus Institut Pertanian Bogor
Abstrak: Chicken meat is one of foodstuffs which derived from animal that can be used by bacteria as a medium to grow and multiply. One of bacteria which uses this medium is Staphylococcus aureus. Staphylococcus aureus is one of the microbial pathogens that can cause food intoxication. The purpose of this research is to determine the contamination of S. aureus in chicken meat which is sold in traditional and modern markets. The meat samples were taken ten times from a traditional and modern market once a week regularly. This research used Gram Coloring test, Catalase test, glucose and mannitol fermentation in aerobic test, coagulase test, and Mannitol Salt Agar (MSA). The results of this study showed that the bacteria in the samples was identified as S. aureus.
Keyword: Traditional market., Staphylococcus aureus, Modern market, Chicken

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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