Judul: Analisis genotipe normal dan abnormal pada klon kelapa sawit (Elaeis guineensis Jacq.) dengan RAPD
Abstrak: The formation of flower and fruit abnormalities in oil palm still unclear. The aim of this study is to analyze the genetic similarities, grouping among normal and abnormal genotypes, and to obtained a specific DNA band for abnormalities by RAPD analysis. Plant materials have been used i.e. MK152, Mk203, MK209, and MK212 (normaVabnormal and male flowers), while clones MK104 and MK176 (normal and abnormal). Amplification of DNA samples have been done with 15 random primers. Genetic similarities and phenogram were analyzed with NTSYS-pc.
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Judul: Analisis Keragaman Genetik Kelapa Sawit (Elaeis guineensis Jacq) Asal Jawa Barat Dengan Penanda RAPD (Random Amplified Polymorphic DNA)
Abstrak: Genetic diversity study is the way to clustering an individual in a population for various prospect such as plant improvement. Oil palm (Elaeis guineensis Jacq) in this research are a population of oil palm that still exist since Holland colony and estimate have resistances to Ganoderma sp. Genotype information from those were conducted by RAPD. This research aims to clustering 58 oil palm trees by RAPD method. The research consist of four stages that begin from DNA isolation, DNA amplification, genetic similarity analysis, and construction of phylogenetic tree by UPGMA (Unweighted Pair Group Method Arithmatic Mean) method in NTSYS. The result of DNA isolation were showed good band and 12000 bp in size. The DNA amplification with 20 random primer were resulted 1870 DNA band from 229 locus. About 95% among of them are polymorphic band. Similarity analysis was showed the genetic similarity coeficient value about 69% - 95%. The clustering at genetic similarity coeficient value 76% was divided the population into two big group. The increasing of genetic similarity coeficient value will be obtained more cluster. This genotype information can be used as references in oil palm improvement program
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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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