Judul: Pemanfaatan Jamur Tiram Putih (Pleorotus ostreatus) dalam Pembuatan Nugget
Abstrak: Tujuan penelitian ini adalah memanfaatkan jamur tiram putih produksi nugget. Desain eksperimen yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap. Faktor yang digunakan adalah substitusi tiram putih jamur untuk daging ayam yang terdiri dari empat taraf, 0% (F0), 60% (F1), 80% (F2) dan 100% (F3). Berdasarkan uji organoleptik formula terpilih adalahF1 yang mengandung jamur tiram putih dan daging ayam sebesar 6:4 (60%). Ini formula mengandung energi 488%; karbohidrat 63,29%; lemak 20,51%; protein 12,52%; serat pangan 11,60%; kalsium 50,16%; besi 5,76%; dan natrium 668,79%. Formula ini dapat dianggap sebagai energi tinggi, karbohidrat, protein, serat makanan, dan nugget besi. Untuk memenuhi 20% Rekomendasi Dietary Allowance (RDA) dari protein, nugget sebaiknya dikonsumsi 100 gram per takaran saji.
Keyword: Nugget, White Oyster Mushrooms Nugget, White Oyster Mushrooms

Judul: Pemanfaatan Limbah Substrat Jamur Tiram dan Penambahan Sumber Nutrisi pada Budidaya Jamur Tiram Putih
Abstrak: Oyster mushroom or Pleurotus ostreatus (Jacq:Fr) Kummer is a type of wood-rot fungi commonly found in nature. White oyster mushroom has been widely marketed in the form of fresh or was processed like mushrooms chips. Substrates commonly used for the development of oyster mushroom cultivation is sawdust of Falcata. The more number of oyster mushroom cultivation gave the more waste of its substrate, while this waste still has nutrients that can be re-used for the cultivation of oyster mushroom. The objective of this study was to study the effect of the use of waste oyster mushroom substrate and liquid organic fertilizer to the growth and yield of oyster mushroom cultivation. Stages in this research consisted of substrate creation, seeding or inoculation, caring and observation of fungal development, and chemical composition analysis. The observations were the growth during the vegetative phase and reproductive phase, the character of the fruit body morphology, and the chemical composition analysis results of oyster mushroom fruiting bodies. The composition media of 75% spent mushroom substrate mixed with 25% of new mushroom substrate gave the best result on growth and mushroom yields. Concentration of 0.2% and 0.5% liquid organic fertilizer gave best yields. Besides the media and genetic factors, environmental factors such as temperature, humidity, and light affected the growth and yield of oyster mushroom.
Keyword: Pleurotus, oyster mushroom, mushroom substrate, mushroom cultivation, liquid organic fertilizer, Bogor Agricultural University (IPB)

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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