Judul: Variasi Kloroplas Shorea laevis Ridl. Di Kalimantan Berdasarkan Penanda Mikrosatelit
Abstrak: Shorea laevis Ridl. merupakan salah satu jenis penting dari famili Dipterocarpaceae ditinjau dari segi ekologi maupun ekonomi. Secara umum, S. laevis menyebar di Semenanjung Myanmar, Thailand, Semenanjung Malaysia, dan Indonesia (Sumatera dan Kalimantan). Penelitian ini menggunakan cpDNA dengan penanda mikrosatelit dan diamati alel serta lokus polimorfiknya yang bertujuan untuk mengetahui distribusi haplotipe cpDNA S. laevis di Kalimantan dan menduga keragaman cpDNA di dalam dan antar populasi S. laevis. Hasil analisis cpDNA berdasarkan penanda mikrosatelit terdapat empat multilokus haplotipe, yaitu A, B, C, dan D. Dua multilokus haplotipe ditemukan pada populasi Sari Bumi Kusuma dan dua multilokus haplotipe ditemukan di populasi ITCIKU. S. laevis memiliki nilai keragaman genetik (He) antara 0,046 - 0,128 dan nilai diferensiasi genetika (Gst) = 0,545. Hubungan kekerabatan terjauh dimiliki oleh populasi Sarpatim dengan Sari Bumi Kusuma, sedangkan populasi dengan jarak genetik terdekat adalah antara populasi Berau, Batu Ampar, Suka Jaya Makmur dan Bukit Bangkirai.
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Judul: Keragaman Genetik Shore laevis Ridl. di Kalimantan Berdasarkan Penanda Mikrosatelit
Abstrak: Shorea laevis Ridl. is one member of commercial species from Dipterocarpaceae family. This species is also as one of the important trees in tropical rain forest, based on ecological and economic evaluation. In general, S. laevis distributes naturally in Peninsular Myanmar and Thailand, Peninsular Malaysia, Sumatera, Aceh, and Borneo Island. The objective of this study was to cross species amplify microsatellites and to estimate genetic variation within and among populations. This study used nuclear microsatellite analysis based on observed alleles and polymorphic loci. Results showed that S. laevis had moderate value of genetic variation within population (He) = 0,4443. In general, this value of genetic variation was smaller if compared to other Shorea species that also analysed by the same method. The closest genetic relationship (smallest distance) was possessed by S. laevis populations of Bukit Bangkirai and PT. ITCIKU, while the furthermost relationship (largest distance) was possessed populations of Batu Ampar and PT. Sari Bumi Kusuma.
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Judul: Kajian Stabilitas Inti Super Berat dengan Nomor Atom 110 Sampai dengan 200 Menggunakan Model Inti Tetesan Cairan
Abstrak: Liquid droplets of nucleic models can be derived equations to estimate the binding energy, binding energy per nucleon, the most stable isotope, and the condition of the occurrence of spontaneous fission. The equations are then converted into a numerical equation form which is then inserted into the MATLAB programming language. Based on the results of the calculations have been carried out in this study, super-heavy nuclei will undergo spontaneous fission in the Z = 135. At Z = 135 the energy needed to create the nucleus undergoing fission or activation energy is very small at around 0:48 MeV. Above Z = 135 the activation energy is negative, it means to form a nucleus with Z> 135 needed some energy. Then at Z = 135 the ratio Z2 / A is 48.86, almost reaching requirement ratio Z2 / A where the nucleic will undergo spontaneous fission is 49. Binding energy per nucleon for super-heavy nuclei up to Z = 200 is about 7 - 5.5 MeV, together with a range of light nuclei are stable. So there may be a super-heavy nuclei are stable at Z <135 and above Z> 135 there will be no stable nucleic
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