Judul: Perkembangan Embrio Ikan Zebra (Danio Rerio) Setelah Paparan Ekstrak Etanol Temu Lawak (Curcuma Xanthorrhiza) Dan Temu Putih (Curcuma Zedoaria).
Abstrak: Temu lawak dan temu putih merupakan obat tradisional yang telah digunakan secara turun-temurun. Kedua tanaman ini telah dilaporkan bersifat toksik pada embrio ikan zebra. Penelitian ini bertujuan untuk mempelajari perkembangan embrio ikan zebra setelah paparan ekstrak temu lawak, temu putih, dan campurannya. Nilai LC50 ekstrak etanol temu lawak, temu putih, dan campurannya berturut-turut adalah 16.9, 112.1, dan 82.9 ppm. Ekstrak temu lawak menyebabkan penghambatan proses menetas pada embrio ikan zebra, sebaliknya ekstrak temu putih tidak menunjukkan efek penghambatan tersebut. Malformasi mayor yang terjadi pada embrio ikan zebra akibat paparan ekstrak temu lawak adalah edema perikardium, koagulasi darah, notokorda, dan edema kantong kuning telur; akibat paparan temu putih adalah edema perikardium dan koagulasi darah; serta akibat paparan campuran keduanya adalah edema perikardium, koagulasi darah, dan sirkulasi darah. Ekstrak temu putih memiliki sifat antagonis terhadap ekstrak temu lawak, yaitu mampu menghilangkan efek penghambatan proses menetas serta menurunkan kelainan pada notokorda dan kantong kuning telur.
Keyword: abnormalitas, embrio ikan zebra, LC50, temu lawak, temu putih

Judul: Uji Toksisitas Ekstrak Etanol Rimpang Temu Putih terhadap Larva Udang dan Embrio Ikan Zebra
Abstrak: Curcuma zedoaria, known as temu putih, is commonly used as traditional medicine in Indonesia. The toxicity of this herb needs to be studied to improve its application. This research aims to evaluate the toxicity of the crude ethanol extract of temu putih rhizome against brine shrimp (Artemia salina) larvae and zebrafish (Danio rerio) embryos and to analyze the suspected active compounds contained in the extract. The crude ethanol extract showed 50% lethal concentration value (LC50) at 588 ppm against brine shrimp larvae and 215 ppm against zebrafish embryos. In zebrafish embryos, exposure of the crude ethanol extract has caused major malformation in development of head, namely brain and eyes organs. Based on the gas chromatography-mass spectrometry analysis, the suspected active compound that play a role in the toxicity are epicurzerenone, curzerene, and curzerenone, which 2,4,6-trimethylacetophenone as the predominant compound.
Keyword: Bogor Agricultural University (IPB), LC50, Danio rerio, Curcuma zedoaria, Artemia salina

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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