Judul: Study of Deuteron Static Properties Based on Relativistic Meson Potential
Abstrak: Persamaan Schrödinger terkopel untuk partikel deuteron dalam potensial meson relativistik telah berhasil dipecahkan menggunakan metode finite difference. Model potensial ini mengatakan bahwa interaksi antar nukleon untuk medium- range dan long-range dimediasi oleh pertukaran beberapa meson yaitu ρ, ω, σ, δ, dan π. Pertukaran meson-meson tersebut menimbulkan interaksi berupa gaya atraktif untuk jarak pisah antar nukleon medium dan jauh. Perhitungan beberapa besaran statis deuteron kemudian dilakukan dengan memanfaatkan fungsi gelombang keadaan S dan D. Hasil perhitungan beberapa besaran statis deuteron yaitu energi ikat E_{B} = 2.23722784 MeV , momen dipol magnet mu_{D} = 0.8611965076 My dan momen quadrupol listrik Q_{d} = 0.3303f * m ^ 2 . Nilai besaran-besaran statis deuteron tersebut mendekati hasil eksperimen. Hal ini menunjukan bahwa model potensial meson relativistik dapat digunakan untuk memodelkan interaksi antar nukleon pada deuteron.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Deuteron, Meson Relativistik, Meson, Finite Difference, Interaksi nukleon nuklon, Diskritasi persamaan diffrensia

Judul: Simulasi Interaksi Nukleon Menggunakan Konsep Pusat Massa dan Potensial Woods-Saxon dengan Metode Runge Kutta Orde 4.
Abstrak: Fisika inti merupakan cabang bahasan dalam bidang fisika yang bertujuan mempelajari stuktur inti atom, interaksi antar penyusun inti atom, dan gaya yang mendasarinya. Penelitian ini bertujuan mendapatkan model interaksi yang terjadi antar nukleon. Interaksi antar nukleon pada penelitian ini dimodelkan dengan sistem pusat massa biner (dua benda) dan potensial yang dialaminya dinyatakan dengan potensial Woods-Saxon dengan parameter tertentu. Persamaan model yang diperoleh selanjutnya diselesaikan menggunakan metode numerik Runge Kutta orde 4 dengan program Matlab R2012a untuk mendapatkan nilai gaya nuklir Woods-Saxon. Model yang digunakan pada penelitian ini bisa menyimulasikan interaksi nukleon pada partikel deuteron, triton, isotop helium-3, dan helium dengan baik.
Keyword: interaksi nukleon, massa, sistem biner, potensial Woods-Saxon

Judul: Uji kinerja promoter gen LEAFY dan AGAMOUS tanaman kakao (Theobroma cacao L.) pada tanaman tembakau (Nicotiana tabacum L.)
Abstrak: Performance of cocoa’s (Theobroma cacao L.) gene promoters, TcLFY and TcAG, in a tobacco plant (Nicotiana tabacum L.) used as a plant model has been tested. The two promoters were introduced into the tobacco plant cells using a modified leaf discs method employing Agrobacterium tumifaciens AGL0. The transformed tobacco plant cells were then regenerated and their morphology were observed periodically. The tobacco plants harbouring the gene promoter TcLFY, during regeneration, showed a leaf morphology similar to that of the positive control. However, the growth rate of tobacco plants inserted with promoter TcLFY was faster compared to that of the positive control. Tobacco plants harbouring gene promoter TcAG, during regeneration, showed imperfect leaf morphology. The growth rate of these tobacco plants was slower than that of the positive control and of the tobacco plants inserted harbouring gene promoter TcLFY. These results indicated that the introduced promoters affect the morphology of the tobacco plants. In order to further confirm the presence of the GFP gene and activation of TcLFY: GFP and TcAG: GFP, a molecular verification test was carried out. Variation of sucrose concentration in the media was made to examine the effect of sucrose on the activity promoters TcAG and TcLFY in tobacco plants. The sucrose concentration tested were 0%, 0,5% and 4% followed by observation on the 3rd and 7th day of cultivation. At 0% sucrose concentration the tobacco plants harbouring promoter TcLFY showed yellowish leaf, while those cultivated in the media with sucrose concentration of 0.5% and 4% grew well and normal. This indicated that sucrose affects the activity of the promoter TcLFY in tobacco plants. Tobacco plants inserted with promoter TcAG did not show significant morphological changes when grown in a medium of 0%, 0,5% or 4% sucrose concentration. This indicated that addition of sucrose does not significantly affect the induction of expression of the AG gene and the activation of the promoter TcAG.
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