Judul: Perbandingan Dua Metode Isolasi DNA pada 49 Jenis Kayu Tropis
Abstrak: Keberhasilan ekstraksi DNA (Deoxyribonucleic Acid) sangat penting bagi proses investigasi genetika kehutanan molekuler. Penggunaan sampel biasanya berupa organ tanaman hutan yang lunak dan muda karena memiliki sumber DNA yang bagus. Namun, jenis sampel tersebut tidak dapat diperoleh dalam kasus tertentu seperti untuk tujuan forensik. Sebagai penggantinya, kayu memiliki potensi sebagai sumber DNA dimana metode ekstraksinya sudah dikembangkan dengan berbagai tingkat keberhasilan, akan tetapi pengujian efektifitasnya pada kayu tropis yang tumbuh di Indonesia belum pernah dilaporkan. Tujuan penelitian ini adalah untuk membandingkan hasil isolasi DNA dari berbagai jenis sampel kayu kering dan segar menggunakan dua metode isolasi yaitu Cetyl Trimethyl Ammonium Bromide (CTAB) dan Qiagen DNeasy Plant Mini Kit (QDPMK). Hasil ekstraksi divisualisasi dalam gel agarosa, dikuantifikasi menggunakan Nanophotometer NP80 Implen dan diamplifikasi menggunakan dua primer universal yaitu ITS dan rbcL. Hasil ekstraksi sampel kayu kering tidak tervisualisasi pada gel sedangkan sampel kayu segar menunjukkan sapuan (smear) yang cukup tebal untuk kedua metode ekstraksi. Hasil uji kuantitas menunjukkan bahwa sampel yang diekstraksi menggunakan metode CTAB memiliki konsentrasi lebih banyak dibandingkan dengan metode QDPMK pada kedua jenis sampel, namun memiliki nilai optical density ratios diluar rentang kemurnian (λ260/280 : 1,8 – 2,0 dan λ260/230 : 2,0). Keberhasilan proses amplifikasi primer ITS dan rbcL pada sampel kering cukup rendah namun tidak berbeda jauh pada kedua metode. Hasil amplifikasi ITS dan rbcL pada sampel kayu segar memiliki keberhasilan yang cukup tinggi.
Keyword: Amplifikasi, CTAB, DNA, Ekstraksi, QDPMK

Judul: Uji Lapang Lacak Balak Kayu Jati dengan Penanda RAPD
Abstrak: INTRODUCTION. Demand for teak based product increases progressively, particularly as raw materials for furniture industry. The increasing demand for teak wood, exceeds the amount that can be produced sustainably by production forest. The gaps existing between demand for raw material teak wood and the volume of teak wood which can be produced have triggered the activity of illegal logging and administrative manipulation of wood. Therefore there is a need for accurate method of producing evidence which is difficult to be manipulated to support log tracking and determine the origin of doubtful wood. The use of genetics technology is a new method to be developed and applied for log tracking certification and evidence seeking for criminal cases, such as illegal logging. Genetic markers are inherent and internal features of the wood itself, so they are difficult to be manipulated. One of the methods of genetic marking which could be applied for DNA analysis was RAPD (Random Amplified Polymorphic DNA). The objectives of this research were testing the matching between stump wood DNA and wood DNA in log landing site (TPK), and approximate detection of the origins of stolen woods and woods which are used for sawmill industry, based on existing database. MATERIALS AND METHOD. This research was conducted in Room of Genetic Analysis, Sub-department of Silviculture, Faculty of Forestry; and Laboratory of Molecular Biology, Inter University Center (PAU), Bogor Agricultural University, from August through October 2008. Plant materials used were woods from KPH (Forest Management Unit) Purwakarta (stump wood and TPK wood) and KPH Ciamis (stump wood, TPK wood, stolen wood and sawmill industry wood). The method used was RAPD (Random Amplified Polymorphic DNA). Equipments used were among other things, tube, micropipette, tips, centrifugation, freezer, electrophoresis bath, PCR machine and UV transilluminator. Materials used were buffer extract, PVP, chloroform, phenol, ethanol, aquabidest, DNA, primer, H2O, taq polymerase, agarose, buffer TAE and blue juice. Tracking of stump wood and TPK wood was conducted on the basis of allelic structure of individual stump woods and TPK woods which were tested. Approximate detection of the origin of stolen wood and sawmill wood was conducted by cluster analysis. RESULTS AND CONCLUSION. Results of log tracking showed similarity in allelic structure between stump wood and TPK wood in teak populations of Ciamis but not for population of Purwakarta. This phenomenon showed DNA technology can be used to match wood DNA between stump and that in TPK. Results of cluster analysis showed that stolen woods and woods used in sawmill industry grouped themselves in West Java cluster, or specifically in cluster KPH Ciamis with least genetic distance of 0.0353 for stolen woods and 0.0358 for woods used in sawmill industry.
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Judul: Dynamic New Keynesian Model for Unemployment and Inflation Rate.
Abstrak: This paper deals with a scientific analysis of the equilibrium level of hiring, employment and unemployment. The basic model being used is a standard new Keynesian model, which states that utility function depends on consumptions and working hours. Utility maximization refers to a standard labour supply equation, with the marginal cost’s dynamics on new Keynesian model simply reflects movements in real wages and productivity. Furthermore, trade-off between output and inflation stabilization can be considered using the new Keynesian Phillips curve. Dynamic general equilibrium model is a model that can be used to study interactions between market imperfections and nominal rigidities, which is capable of overcoming the main shortcoming of the standard new Keynesian model. In the general equilibrium model there are three groups of the economy agents, namely households, firms and monetary authority. The results of this research science that bargaining processes between firms and workers will yield optimal wage. Increase in labour will cause wages to fall, but the unemployment rate can be reduced. An increase in the firm’s monopoly power will shift the labour demand curve downward, which will reduce the number of workers that firm is willing to hire for any given bargained wage.
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