Judul: Pemberian ekstrak bawang merah,liquinox Start, NAA, Rootone-F untuk aklimatisasi stek mini pule pandak (Rauvolfia serpentina Benth.) hasil kultur in vitro
Abstrak: Pule pandak (Rauvolfia serpentina Benth.) merupakan salah satu jenis tumbuhan langka dari famili Apocynaceae yang mengandung senyawa alkaloid dan banyak digunakan masyarakat sebagai bahan obat diantaranya obat untuk mengatasi tekanan darah tinggi, disentri dan kurang nafsu makan. Salah satu usaha untuk menyelamatkan pule pandak dari kepunahan adalah dengan kegiatan konservasi ex-situ. Penelitian aklimatisasi stek mini pule pandak dilakukan untuk menjawab salah satu permasalahan yang muncul setelah perbanyakan dengan teknik kultur jaringan. Penelitian dilakukan pada 26 Februari - 21 Mei 2007 di rumah kaca Pusat Konservasi Ex-Situ Tumbuhan Obat Hutan Tropika, Laboratorium Konservasi Tumbuhan Departemen Konservasi Sumberdaya Hutan dan Ekowisata, Fakultas Kehutanan Institut Pertanian Bogor. Bahan tanaman yang digunakan adalah stek mini pule pandak hasil kultur in vitro. Bahan perlakuan berupa ekstrak bawang merah 200 ml/1, liquinox start 2 mV/L, NAA 2 mg/l, rootone-F dan gabungan NAA 2 mg/l dengan rootone-F. Semua perlakuan dicampur juga dengan larutan hyponex hijau 2 g/l kecuali rootone-F, yang diberikan pada saat perendaman stek dan perawatan. Media tanam berupa campuran arang sekam, pasir dan kompos (1:1:1). Pengamatan dilakukan terhadap seluruh unit contoh yang ditanam, meliputi: persentase peluang hidup, persentase stek berakar, panjang akar, pertambahan tinggi tanaman, pertambahan jumlah daun dan perubahan warna daun. Pengolahan dan analisis data dilakukan menggunakan Percobaan Satu Faktor (Single Factor Experiments) dengan metode Rancangan Acak Lengkap (Completely Randomize Design)
Keyword: Morfologi pule pandak, Kandungan kimia pule pandak, Kultur jaringan pule pandak

Judul: Pemberian Ekstrak Bawang Merah, Liquinox Start, NAA, Rootone-F Untuk Aklimatisasi Stek Mini Pule Pandak (Rauvolfia serpentina Benth.) Hasil Kultur In Vitro
Abstrak: Pule pandak (Rauvolfia serpentina Benth) is a kind of scarce plant from family Apocynaceae that has alkaloid compound and it's often used as a raw material of medicine such as medicine for making high blood presure out, making dysentry out, and making lose appetite out. One of efforts to save pule pandak from extinct is doing an ex-situ conservation activity. The research of mini cuttings acclimatization of pule pandak was done for solve the problem uppeared after had done propagation using tissue culture technique. The conclusion is all of treatments gave significant effect to the growth of root and the increasing of stem height. The best seed based on the average of root lenght and the increasing of stem height is the seed resulted from cuttungs with rootone-F. The highest chance to live is had by control cuttings
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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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