Judul: Variasi Genetik, Isotop, dan Spektra Near Infrared (NIR) Kayu Jati di Jawa
Abstrak: Penggunaan teknologi genetik, isotop dan near infrared (NIR) merupakan metode baru yang mungkin dapat dikembangkan dan diterapkan di masa datang untuk sertifikasi lacak balak dan pembuktian kasus kejahatan hutan, seperti illegal logging. Penelitian terdahulu khususnya untuk DNA, masih memiliki beberapa kekurangan, menggunakan sampel berupa daun, dari sedikit lokasi dan berbasis individu sehingga kurang mewakili variasi genetik jati di Jawa dan belum cukup menyediakan informasi yang diperlukan bagi lacak balak. Analisis genetik menggunakan contoh uji kayu hingga saat ini masih jarang dilakukan. Berbagai alasan mendasari mengapa contoh uji kayu jarang digunakan karena selain memiliki tingkat kesulitan yang tinggi, di dalam kayu sendiri terkandung sifat degraded-DNA yaitu DNA tidak tersebar merata pada semua jaringan kayu.
Keyword: Teak, DNA, Chemical component, NIR Spectra

Judul: Variasi Genetika Jati Jawa Berdasarkan Metode Random Amplified Polymorphic DNA (RAPD)
Abstrak: Information on genetic variation of teak in Java at present is still limited. Existing data mostly were based on isozyme analysis, on few localized population, and using leaves as sample materials. In this study usage of RAPD (Random Amplified Polymorphic DNA) as one of DNA markers, and teak wood as material to study teak genetic diversity could enrich the available information. Samples were collected from nine Forest Management Unit (FMU) representing three provinces in Java, i.e. FMU Banten, FMU Ciamis and FMU Indramayu of West Java province, FMU Cepu, FMU Kebonharjo, FMU Kendal and FMU Randublatung of Central Java province, FMU Bojonegoro and FMU Ngawi of East Java province. Leaves DNA were extracted using CTAB method and woods DNA were extracted using CTAB (Cethyl Trimethyl Amonium Bromide) method, while RAPD analysis were done using four selected primers, i.e. OPY2, OPY9, OPO13 and OPY11 . Generated data were then analyzed using POPGENE version 3.2 and NTSYS 2.02. Results showed that teak genetic diversity in Java as measured from heterozygosity level ranged from 0,0614 (FMU Ngawi) to 0,2753 (FMU Indramayu). Dendrogram based on calculated Nei’s genetic distances clustered the populations into two main groups, i.e. West Java province and Central-East Java province. Amplified DNA from wood comprised only of small size fragments (maximum 500bp) as compared to those of leaves (maximum 2500bp). If wood is going to be used as material for fingerprinting traded forest products, a refinement method in DNA analysis should be done
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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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