Judul: Efektivitas Ekstrak Biji Nimba Azadirachta indica untuk Pengobatan Parasit Argulus sp. pada Ikan Mas Koki Carassius auratus
Abstrak: Goldfish is an ornamental fish favored by many people because of it’s body shape and color unique. One of the obstacle in the cultivation of goldfish is an ectoparasite that infected on it’s body and fin called Argulus sp. One of the plants that used as medicinal treatment is a neems. This study aimed to examining the effectivity of neems seeds extract in reinsing the Argulus sp in the goldfish. This research consists of 5 treatments with 2 replications, namely neems seeds extract with concentrations A (20 mg/l), B (40 mg/l), C (60 mg/l), K- (dimilin 1.5 g/l), and K+ (without neem extract and dimilin). The result shows that the treatments of neem seeds extract 40 mg/l cause reduction/slope the intensity level of Argulus sp. and increasing the survival rate of goldfish higher more than other neems seeds extract dossage.
Keyword: neem, goldfish, Argulus sp

Judul: Efektivitas dan Efisiensi Pengobatan Parasit Argulus sp. pada Ikan Mas Koki Carassius auratus dengan Ekstrak Kasar Bakteri Simbion Spons Strain S12-3(C)
Abstrak: Penelitian ini bertujuan untuk menguji efektivitas dan efisiensi senyawa ekstrak kasar kultur bakteri untuk penanggulangan parasit Argulus sp. pada ikan mas koki. Prosedur yang digunakan pada penelitian ini meliputi ekstraksi kasar bakteri simbion, uji toksisitas terhadap Artemia sp. koleksi parasit, uji tantang, dan pengobatan. Konsentrasi pengobatan menggunakan ekstrak kasar bakteri simbion spons yang diberikan pada penelitian ini adalah 100 mg/L, 50 mg/L, 10 mg/L, kontrol dimilin® (1500 mg/L), dan kontrol positif (0 mg/L). Hasil dari penelitian ini menunjukkan bahwa penggunaan ekstrak kasar bakteri simbion spons pada dosis 50 mg/L efektif untuk membunuh parasit Argulus sp. dalam jangka waktu 4 hari dengan survival rate ikan 100 %. Hal ini menunjukkan efektivitas yang lebih baik daripada kontrol pengobatan menggunakan dimilin®. Selain efektif, penggunaan ekstrak kasar bakteri simbion spons juga lebih efisien, dilihat dari keuntungan yang diperoleh yaitu sebesar Rp 366 813,- dibandingkan dimilin® yang hanya Rp 192 803,-.
Keyword: Argulus sp, bakteri simbion spons, ikan mas koki, senyawa bioaktif

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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