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Fucoidan is composed of l-fucose, sulfate groups and one or more small proportions of d-xylose, d-mannose, d-galactose, l-rhamnose, arabinose, glucose, d-glucuronic acid and acetyl groups in different kinds of brown seaweeds. Many reports have demonstrated that fucoidan has antitumor activities on various cancers. However, until now, few reviews have discussed the antitumor activity of fucoidan and...
At present, Lao grids are not yet interconnected over the whole nation. According to electrical connections, there are 3 parts: northern-middle grid, southern grid I, and southern grid II. This document analyzes voltage level of Laos Northern Grid in terms of the scheme of putting into operation, Laos Northern Grid line charging power compensating ratio is relatively low. At relatively light load,...
In some cases, continuous small power disturbances can excite a low-frequency oscillation. Removal of disturbance source is the best way to rapidly damp the oscillation down. In this paper, a new method is proposed to locate disturbance source that is based on the space-time characteristics of low-frequency oscillation in the large-scale power grid. Meanwhile, a new principle for out-of-step oscillation...
In this study, we developed and validated a new, rapid, specific and sensitive ultra-performance liquid chromatography–tandem mass spectrometric (UPLC–MS/MS) method to simultaneously determine parecoxib sodium (PX) and its active metabolite, valdecoxib (VX), in rat plasma. Plasma samples were prepared by plasma protein precipitation combined with a liquid-liquid extraction method. The separation was...
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