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: Efek laktagogum daun jinten (colens ambonicus lour) pada tikus laktasi
Abstrak: Penelitian dilakukan di Laboratorium Fisiologi dan Farmakologi Fakultas Kedokteran Hewan dan Laboratorium Biokimia Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Pertanian Begor sejak bulan Juni 1992 hingga Pebruari 1993. Tujuan dari penelitian ini adalah untuk mengetahui efek daun jinten terhadap produksi air susu, pertumbuhan kelompok anak, kadar DNA, kadar RNA kelenjar mammae, konsentrasi tiroksin dan glukosa serum pada tikus laktasi. Dalam penelitian ini di gunakan 90 ekor tikus putih (Wis tar) umur tiga bulan yang sedang laktasi. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan enam perlakuan, lima ulangan dan RAL pola Faktorial, di mana faktor pertama yaitu pemberian ekstrak daun jinten dan faktor kedua yaitu periode laktasi hari ke-2, ke-14 dan ke-28. Perlakuan yang diberikan adalah pember ian ekstrak daun jinten per oral kepada masingmasing kelompok tikus laktasi sebanyak o, 20, 40, 60 dan 80 g/kg BB, dua hari sekali selama 26 hari. Sebagai kontrol positif diberikan moloco+B12 yang mengandung 15 mg ekstrak plasenta dan 20 mg vitamin B12. Kadar DNA dan RNA ditentukan dengan menggunakan pereaksi difenilamin dan orsinol, sedangkan konsentrasi T4 ditentukan dengan metode Solid Phase Radioimmunoassay (RIA) dan konsentrasi glukosa serum ditentukan dengan metode GOD PAP.
Keyword: Coleus amboinicus

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.
Keyword: