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 Berbasis Potensial Woods-Saxon Termodifikasi dan Konsep Pusat Massa dengan Metode Runge Kutta Orde 4
Abstrak: Inti atom tersusun atas nukleon-nukleon yang saling berinteraksi. Interaksi nukleon dalam inti atom sudah pernah disimulasikan pada penelitian sebelumnya menggunakan potensial Woods-Saxon umum dengan sistem biner. Akan tetapi simulasi tersebut hanya berhasil sampai inti atom helium dan isotopnya. Interaksi nukleon di dalam inti atom dengan nomor massa di atas inti atom helium belum berhasil disimulasikan. Penelitian ini bertujuan menyimulasikan interaksi nukleon pada inti atom dengan nomor massa di atas inti atom helium dan membandingkan hasil simulasi setiap inti atom. Potensial yang digunakan adalah potensial Woods Saxon termodifikasi dengan tetap menggunakan sistem biner. Pola interaksi nukleon ditemukan melalui analisis numerik persamaan orbit massa tereduksi dari kedua massa yang berinteraksi pada sistem biner dengan metode Runge Kutta orde 4. Penelitian ini mampu menyimulasikan hingga inti atom berilium-10 dengan percobaan tambahan pada inti atom boron dan karbon. Karakteristik massa nukleon mempengaruhi bentuk potensial dan karakteristik pola interaksi nukleon setiap inti atom. Sistem biner hanya dapat diterapkan pada inti atom dengan massa yang kecil., The nucleus of an atom is composed of interacting nucleons. Nucleon interactions in atomic nuclei have been simulated in previous studies using a common Woods-Saxon potential with a binary system. But the simulation only worked up to the nucleus of the helium and its isotope. The interaction of nucleons in the nucleus with mass numbers above the nucleus of helium has not been successfully simulated. This study aims to simulate the interaction of nucleons in the nucleus with a mass number above the nucleus of helium and compare the simulation results of each atomic nucleus. The potential used is the modified Woods-Saxon potential while still using a binary system. Nucleon interaction patterns are found through numerical analysis of the reduced orbital mass equations of the two masses interacting in a binary system using 4 th order Runge Kutta method. This research is able to simulate up to the nucleus of beryllium-10 with additional experiments on the nucleus of boron and carbon. The mass characteristic of interacting nucleons affects the potential form and the characteristics of nucleon interaction pattern of each atomic nucleus. Binary systems can only be applied to atomic nuclei with small masses.
Keyword: binary, modified Woods-Saxon, nucleons interaction

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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