Judul: Analisis Fitokimia Simplisia Daun Jinten (Coleus ambinicus) pada Tempat Tumbuh yang Berbeda
Abstrak: Coleus amboinicus Lour, known as daun jinten in Indonesia, is widely used as herbal medicinal plant for increase of breast milk production, antiseptic and afrodiciac. This plant is expected to have different component appropriate with their habitat condition. The purpose of the research was to identify phytochemical component and to compare the levels of total phenolic and flavonoid compound of daun jinten, and to analyze the factors that distinguish both total component in phytochemical from soil component and temperature of growing place from daun jinten such as Tegal and Bogor. The average soil organic element from Tegal was higher. Based on phytochemical analysis, simplicia of daun jinten contained alkaloid, flavonoid, saponin, steroids, and tannin. The total content of phenolic from Tegal was 1.698 mg GAE/g simplisia and 2.009 mg GAE/g simplicia and the total content of phenolic from Bogor (2.040 mg GAE/g simplicia and 1.340 mg GAE/g simplicia). The total content of flavonoid from Tegal was 1.922 mg QE/g simplicia and 2.987 mg QE/g simplicia higher than the total content of flavonoid from Bogor (1.285 mg QE /g simplicia and 0.925 mg QE/g simplicia). Differentiation in component of soil nutrient element and climate habitat condition influenced with differentiation of levels in total phenolic and flavonoid compound daun jinten (Coleus amboinicus Lour).
Keyword: Bogor Agricultural University (IPB), daun jinten, phytochemical, soil nutrient element, Medicinal plant, Breast milk production

Judul: Pengaruh pupuk fosfor dan pupuk herbal pada tiga  taraf naungan terhadap pertumbuhan dan metabolit  sekunder tanaman daun jinten (Coleus amboinicus  Lour)
Abstrak: Tujuan dari penelitian ini adalh mengkaji pengaruh fosfor dan pupuk herbal pada tiga taraf naungan terhadap pertumbuhan dan kadar metabolit sekunder tanaman daun jinten (Coleus amboinicus Lour.). Penelitian ini dilaksanakan dikebun percobaan IPB Baranang Siang Bogor. Penelitian dilaksanakan dari bulan Oktober 2000 sampai Juni 2001, dengan menggunakan rancangan acak kelompok berfaktor, yang terdiri dari 2 faktor. Faktor pertama adalah tiga taraf naungan (0%, 50% dan 75%). Faktor kedua adalah 16 kombinasi percobaan dari 4 dosis pupuk P (0 P; 1.25 g/polibag P;1.875 g/polibag P dan 2.50 g/polibag P) dan dosis pupuk herbal (0 g Herbal; 0.25 g/polibag P dan 2.50 g/polibag P) dan dosis pupuk herbal (0 g Herbal; 0.25 g/polibag Herbal; 0.75 g/polibag Herbal dan 1.25 g/polibag Herbal) dengan 3 ulangan.
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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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