Judul: Keragaan Planlet Dendrobium Lasianthera (Jj. Smith) Hasil Iradiasi Sinar Gamma Generasi Mv1
Abstrak: Dendrobium merupakan salah satu genus anggrek yang paling banyak diminati oleh konsumen. Dendrobium lebih disukai karena bentuk dan warna bunganya lebih bervariasi, daya tahan kesegaran bunganya lebih lama, produktivitasnya tinggi dan harganya terjangkau. Salah satu anggrek dendrobium spesies yang ada di Indonesia dan dipergunakan dalam penelitian ini adalah Dendrobium lasianthera (JJ. Smith) yang berasal dari Papua Nugini dengan ciri khasnya berpetal keriting. Penelitian ini bertujuan untuk mengidentifikasi keragaman karakter kuantitatif dan keragaan planlet Dendrobium lasianthera (JJ. Smith) setelah aklimatisasi yang sebelumnya telah diiradiasi sinar gamma pada kondisi in vitro dengan dosis 0, 20, 40, 60 dan 80 Gy. Hasil dari penelitian ini menunjukkan bahwa iradiasi sinar gamma dapat menginduksi keragaman dan berpengaruh nyata terhadap karakter kuantitatif yaitu jumlah daun, panjang daun, lebar daun, tinggi tanaman, jumlah akar, panjang akar, ukuran stomata, kerapatan stomata dan pengurangan jumlah kromosom. Pada keragaan tanaman juga terdapat perubahan berupa bentuk daun, bentuk ujung daun, tekstur permukaan daun, simetri daun dan tanaman roset.
Keyword: anggrek, keragaman, kromosom, karakter kuantitatif, stomata

Judul: Pengaruh iradiasi sinar gamma terhadap pertumbuhan plb anggrek Dendrobium lasianthera (JJ. Smith) secara in vitro
Abstrak: This research aimed to learn the effect of gamma ray-irradiation on protocorm like bodies (plb) Dendrobium lasianthera and determined Lethal dosage (LD) 30 and 50. The irradiation has done at the Center of Technology Application of Isotops and Radiation, Nuclear Energy Agency (PATIR-BATAN), the research started from February 2014 to July 2014. The research implemented the completely randomized design (CRD) with a single factor that gamma rayirradiation dosage were 0 Gy, 20 Gy, 40 Gy, 60 Gy, 80 Gy, and 100 Gy. Each dose of gamma ray-irradiation treatment was repeated 5 times, of which there were 30 units of the experiment and each experimental unit consisted of five culture bottles were individually planted 4 plb Dendrobium lasianthera. The results of this research showed that the effect of gamma ray-irradiation dose significantly decreased the percentage of live plb, percentage of plb germination, number of leaves, number of roots, the percentage of rooted plant. Plantlets changes observed among other wide leaves, and the spiral leaves. Lethal dose 30% (LD30) was at 19.7697 Gy irradiation dose and LD50 was at 67.3504 Gy irradiation dose.
Keyword: Bogor Agricultural University (IPB), mutation, Lethal Dosage (LD), in vitro, gamma ray-irradiation, Dendrobium lasianthera

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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