Judul: Penambahan Cocktail Enzyme pada Kulit Buah Kakao, Tongkol Jagung, dan Bungkil Biji Karet yang Digunakan sebagai Bahan Baku Pakan Ikan Gurame
Abstrak: The aim of this research was to increase the digestibility of local feedstuff (cocoa pods, corn cobs, and rubber seed) by the addition of cocktail enzyme. Fish used in this study was giant gourami Osphronemus goramy with an average body weight of 20,65±0,75 g. Cocktail enzyme used was a mixture of enzymes, which consisted of xylanase, manannase, ligninase, and pectinase. Previously milled feedstuff was incubated with cocktail enzyme at a concentration of 2 g/kg material at room temperature for 24 hours. Subsequently, the incubated feedstuffs were dried, mixed with reference diet with a ratio of 30:70 and Cr2O3as a marker at a concentration of 0,5%, and used as the feed for digestibility test. Feeding was performed for 15 days and the feces were collected since the 6th day. The results show that the addition of cocktail enzyme could increase crude protein content of feedstuff with a range of 10-55%, and decrease crude fiber content of cocoa pods and corn cobs meals with a range of 17-41%. Furthermore, cocktail enzyme could also increase the feed digestibility by the giant gourami.
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Judul: Evaluasi kecernaan bungkil biji karet, kulit buah kakao, dan bonggol jagung yang difermentasi dengan cairan rumen domba pada pakan ikan nila
Abstrak: Penelitian ini bertujuan untuk mengevaluasi kecernaan bahan bungkil biji karet, Kulit buah kakao, dan bonggol jagung yang difermentasi dengan cairan rumen domba pada pakan ikan nila. Cairan rumen domba disaring kemudian digunakan intuk fermentasi bahan uji yaitu bungkil biji karet, kulit buah kakao, dan bonggol gung dengan konsentrasi 400mL/kg bahan selama 24 jam. Bahan yang belum dun sudah difermentasi kemudian digunakan untuk uji biologis dengan komposisi 10% bahan uji, 67,5% pakan komersial, 0,5% Cr:O, dan 2% binder. Ikan nila dengan ukuran rata-rata 7,310,267g/ekor digunakan sebagai ikan uji dan diberi kan perlakuan selama 20 hari dengan pengambilan feses dimulai pada hari keenam. Hasil penelitian menunjukkan bahwa fermentasi dapat meningkatkan Radar protein semua bahan sebesar 13,72-50,09%, dan menurunkan serat kasar semua bahan sebesar 20,83-28,05% kecuali pada bungkil biji karet. Hasil uji ologis pada ikan nila menunjukkan bahwa fermentasi dapat meningkatkan Recernaan protein, kecernaan energi, dan kecernaan total ketiga bahan yang diuji.
Keyword: Rubber seed, Cocoa pod, Corncob, Fermentation, Digestibility

Judul: Utilization of terra/MODIS L1B data for analysis of horizontal wind profile in the troposphere
Abstrak: This study was concerned with horizontal wind derived from data collected with the Moderate-resolution Imaging Spectroradiometer (MODIS) on board the NASA’s Earth Observation System (EOS)-Terra satellite. The aim of this study is to develop a method for the estimation of horizontal wind movement in the troposphere based on Navier-Stokes equation. The method was applied to a calibrated and geolocated Terra/MODIS L1B 1 km data set. The data inputs to estimate surface temperature are retrieved from TIR (Thermal Infrared) bands 31 (10.780 μm to 11.280 μm) and 32 (11.770 μm to 12.270 μm). The obtained surface temperatures were later used to approximate geopotential height on a constant-pressure surface by using the modified Poisson equation. The main assumptions used are the hydrostatic equilibrium, ideal gas law, constant lapse rate and constant acceleration of gravity. Based on the distribution of geopotential height, the pressure gradient force is measured by the gradient of geopotential on an isobaric coordinate to present the horizontal wind profile. For certain topographic areas especially in the mountain ranges, there was a disadvantage of using pressure as a vertical coordinate which lead to inaccuracy. In spite of that, Terra/MODIS L1B data with 1 km spatial resolution can be used to estimate the horizontal wind movement in the troposphere.
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