Judul: Pemberian Kappa-Karagenan secara Oral pada Ikan Lele Dumbo Clarias sp. untuk Meningkatkan Respons Imun Non-Spesifik dan Resistensi terhadap Aeromonas hydrophila
Abstrak: A study to evaluate the role of k-carageenan in varying dose to prevent A. hydrophilla infection was conducted. Experiment comprised by two stages. The first stage which to obtain the best dose, had performed by suplementation the k-carageenan at rate 5 g/kg, 10 g/kg, 20 g/kg of fish feed, and control. After four weeks rearing all fish except in negative group was chalenged by A. hydrophilla with consentration 108 cfu/fish that performed by means intramusculary injection. The best dose then determined according to survival and hematology assay of fish. The second stages studied about efficacy of duration administration at daily, seven days, 14 days, and 21 days of the best outcoming dose, where the efficacy determined through the growth rate and survival rate of fish during14 days post-infection. The results showed that fish in group 10g kg-1 had better performance compared to other chalenged group. The value of suvival rate, total haemoglobin, hematocrite, eritrocyte count, leucocyte count, and phagocytic activity were 95,83%; 10,40±1,25 g%; 33,47±1,47%; 2,19±0,06 (106 cell/mm3); 14,47 ± 0,96 (105 sel/mm3); and 16,35 ±1,10% respectively. Moreover, even not support survival rate of fish at best (only 71%, lower than 80% at 21 days treatment), application at 14 days had considered as the best duration administration due to it’s support to the growth rate of fish at best (28g) when compared to others. Then, it was conclude that administration at rate 10 g/kg in combination with 14 days application, had better effect to elevate the immune system of catfish.
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Judul: Pemberian kappa-karaginan untuk meningkatkan respon imun non-spesifik dan resistensi penyakit pada ikan lele dumbo Clarias sp.
Abstrak: Penyakit Motile Septicaemia (MAS) yang disebabkan oleh bakteri Aeromonas hydrophila, merupakan masalah utama dalam pembudidayaan ikan air tawar, termasuk ikan lele dumbo Clarias sp. Penelitian ini dilakukan untuk meningkatkan respon imun non-spesifik ikan lele terhadap infeksi bakteri A. hydrophila, menggunakan imunostimulan kappa-karaginan (k-carragenan) yang diekstrak dari rumput laut E. cottonii.
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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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