1,467 research outputs found
Investigation of the mRNA expression for secreted frizzled-related protein 2 (sFRP2) in chick embryos
No full textPyrimidinoceptor-mediated Activation of Phospholipase C and Phospholipase A2 in RAW264.7 Macrophages.
No full textImprovement of wear and cavitation-erosion by ALD-deposited LiAlxOy films on an Mg-10Li-0.5Zn alloy
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Enhancement of random lasing through fluorescence resonance energy transfer and light scattering mediated by nanoparticles
No full textSpatio-temporal variation in the elemental compositions of otoliths of southern bluefin tuna Thunnus maccoyii in the Indian Ocean and its ecological implication
No full textThe elements Na, Mg, Mn, Ca, Sr and Ba in otoliths of southern bluefin tuna Thunnus maccoyii, collected from their feeding ground in the central Indian Ocean and spawning ground between southern Java and north-western Australia were measured by laser-ablation inductively coupled plasma mass spectrometry (LA-ICPMS) and compared among sampling locations and developmental stages. The Na, Mg and Mn to Ca concentration ratios were significantly higher at the larval stage than at the adult stage, and the ratio reached a peak at the first inflection point of the otolith, mean ±s.d. 43·3 ± 4·9 days after hatching and decreased sharply to a low level thereafter. The temporal change of the elements:Ca ratios in the first inflection point corresponded to the life stage transition from larva to juvenile, indicating that the uptake rate of elements from ambient waters was significantly influenced by the ontogenetic change in the fish. The elemental composition at the otolith edge differed significantly in sub-adults on the feeding grounds and adults on the spawning grounds. Thus, the otolith elemental composition can be used as a biological tracer to study the time of the ontogenetic shift and to reconstruct the past migratory environmental history of T. maccoyii. In addition, the elemental composition of the otolith core of the adult was similar between feeding and spawning grounds, indicating that the fish in the Indian Ocean had the same larval origin, which is consistent with the single spawning population hypothesis
On Three-dimensional Continuous Saltating Process of Sediment Particles Near the Channel Bed
No full textSimultaneous determination of some sweeteners and preservatives in Chinese preserved fruits by micellar electrokinetic capillary chromatography.
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