Judul: Studi Kekerabatan dan Morfologi Padi Lokal Adan Hasil Mutasi Sinar Gamma
Abstrak: Adan rice is a variety of rice grown in the highlands of East Kalimantan with only once harvest every year. Mutation by gamma rays on this Adan rice make its age of ripening more early in order to increase its productivity. Analysis of molecular and morphological from Adan rice mutant has not been done before. That analysis needs to be conducted to compare the differences between wildtype of rice and mutant Adan rice. This research aimed at showed diversity or similarity of wildtype Adan rice and mutant Adan rice used microsatellite or SSR markers. The dendogram obtained from molecular analysis SSR showed that wildtype Adan rice and mutant Adan rice (BMA 1-9) are located in same large group with 58% similarity coefficient. Mutant rice is similar to the wildtype in the BMA 3 and BMA 9 groups. Mutations with gamma rays shortened on flowering and increased the number of productive tillers to 96%. Mutations of gamma rays also shortened the height of rice mutants until 20%, reduced the total number of tillers from mutant rice until 44%, and reduced the number of leaf yellowing mutant rice until 66%.
Keyword: similarity coefficient, microsatellite (SSR), Adan rice

Judul: Analisis Sidik Jari DNA Padi Beras Merah, Padi Aromatik, dan Padi Genjah
Abstrak: Rice is one of major crops comodities with a high fenotype diversity. It can be divided into 3 cluster, red rice, aromatic rice, and genjah rice. The differences between those cluster, can be seen from fenotype and genotype of each variety using molecular markers based on gene. The objective of this research is to identify the specific character of red rice, aromatic rice, and genjah rice and the genetic diversity using Simple Sequence Repeat (SSR) molecular markers. Material genetic from rice was isolated using isolation DNA standard method, break the cell wall, expel parts of the cell, and precipitate the DNA parts (Sambrook method), and then the isolate was amplified using polymerase chain reaction (PCR) amplification procedure. Subsequently, analysis by association, evolution, and linkage (TASSEL) software was used for data processing. Genetic variation is based on the result of DNA amplification using PCR process from rice variety used. The results of this research showed the variation of DNA bands from 100 bp until 350 bp of red rice, aromatic rice, and genjah rice varies, also there is association between fenotype and genotype of variety in cluster. TASSEL was used to obtain description of variety and produced a dendrogram that show us the variety type of those variety, also which variety and markers has a significant result in amplification procedure.
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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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