Judul: Evaluasi Penurunan Serat Kasar dan Peningkatan Nilai Kecernaan Bungkil Kelapa Dengan Penambahan Enzim Cairan Rumen Domba Sebagai Bahan Baku Pakan Ikan Mas Cyprinus carpio
Abstrak: The objectives of this work were to evaluate the roles of sheep rumen liquor enzymes on its capability to reduce the crude fiber contant and enhance the apperent digestibility of coconut cake meal (BK) for common carp Cyprinus carpio. The work comprised by two stages experiments. In experiment I, BK was hydrolized with 0, 25, 50, 75, 100, or 125 ml enzymes/kg BK for 0, 12, and 24 hours, respectively. Thereafter, proximate compositions of BK were analyzed. In experiment II, hydrolyzed BK (BKe) contained the least crude fiber content from the result of experiment I was tested for its digestibility. It was found that BK hydrolyzed with 125 ml enzymes/kg BK for 24 hours had the lowest value of crude fiber content, and highest value of glucose content. In this treatment, crude fiber content was decreased from 14,34% to 6,98%, while the glucose content was increased from 0,014% to 0,464%. The apparent digestibility of BKe was found to be higher than BK. The total digestibility, protein carp was 63,92% and 54,58%, 79,53% and 65,17%, 72,2% and 49,17% for BKe and BK, respectively. It was concluded that sheep rumen liquor enzymes could reduce the crude fiber content of BK, and enhance its apparent digestibility for carp Cyprinus carpio.
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Judul: The Effectiveness of Sheep Rumen Liquor Enzyme Addition on The Reduction of Cocoa-pod Husk Meal Fiber Content and Its Digestibility in Tilapia Diet.
Abstrak: Dua tahap penelitian dilakukan untuk mengevaluasi penambahan enzim cairan rumen domba dalam menurunkan kandungan serat kasar kulit buah kakao (KBK) dan mengevaluasi kecernaan KBK yang telah dihidrolisis dengan enzim cairan rumen domba dalam pakan ikan nila Oreochromis niloticus. Pada penelitian tahap satu, enzim cairan rumen domba ditambahkan dengan konsentrasi yang berbeda yaitu 0, 50, 100 dan 150 mL/kg KBK dengan lama inkubasi yang berbeda yaitu 0, 12, dan 24 jam. Pada penelitian tahap dua, nilai kecernaan ditentukan dengan menggunakan indikator Cr2O3 yang ditambahkan ke dalam pakan acuan dan pakan perlakuan, yaitu pakan dengan penambahan KBK yang telah dihidrolisis dengan dosis terbaik pada penelitian tahap satu (KBKe) dan kulit buah kakao tanpa hidrolisis (KBK). Ikan nila yang digunakan mempunyai bobot rata-rata 3,86 ± 0,44 g ditebar dengan kepadatan 15 ekor per akuarium dan dipelihara selama15 hari. Hasil penelitian tahap satu menunjukkan hidrolisis KBK dengan menggunakan cairan rumen 150 mL/kg dan lama waktu inkubasi 12 jam dan 24 jam mempunyai nilai serat kasar KBK terendah yaitu sebesar 21,38% dan 21,67%. Sedangkan pada uji kecernaan terlihat bahwa nilai kecernaan bahan KBKe lebih tinggi (33,95%) dibandingkan dengan KBK (10,97%). Dengan demikian dapat disimpulkan bahwa penambahan enzim cairan rumen domba dapat menurunkan kandungan serat kasar kulit buah kakao dan meningkatkan kecernaan dari kulit buah kakao pada pakan ikan nila
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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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