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Phenotypically wingless (ws) chick embryos have wing buds characterized by the spreading of mesenchymal cell death in an anterior-to-posterior direction beginning at stage 19. It has been argued that this may reflect the absence of a functional polarizing zone (ZPA). When tested by preaxial grafting into normal wing buds (stages 20-21), wingless ZPAs (stage(More)
The use of apoptosis-inducing agents in the treatment of malignant cancer is increasingly being considered as a therapeutic approach. In this study, the induction of apoptosis and necrosis was examined in terms of temporal dose responses, comparing a malignant and nonmalignant breast cell line. Staurosporine (SSP)-induced apoptosis and H(2)O(2)-induced(More)
Within the eMinerals project we have been making increasing use of CML (the Chemical Markup Language) for the representation of our scientific data. The original motivation was primarily to aid in data interoperability between existing simulation codes, and successful results of CML-mediated inter-code communication are shown. In addition, though, we have(More)
The purpose of a staging system is to stage embryos by morphology rather than chronology. This is particularly useful when embryos do not develop exactly synchronously, as in the case of the chick. At present the Hamburger and Hamilton (1951) series is universally used to stage chick embryos. The aim of the present study was to provide a series of(More)
Removal of the posterior half of the chick wing bud between stages 17-22 results in failure of the anterior distal tissue to survive and differentiate. This observation has been interpreted in terms of a requirement by the anterior half of a factor supplied by the posterior half of the limb containing the zone of polarizing activity (ZPA). This relationship(More)
Twenty-nine white-clover pastures from the North Island of New Zealand were tested by enzyme-linked immunosorbent assays for five viruses: Alfalfa mosaic virus (AMV), Beet western yellows virus (BWYV) Red clover necrotic mosaic virus (RCNMV), Soybean dwarf virus (SbDV) White clover mosaic virus (WClMV) and also for potyviruses. All the pastures were(More)
The query of material's properties via a grid enabled Web portal plays a critical role in the MaterialsGrid project within eScience. However, developing a normal standard portlet to query material properties is by no means a perfect solution. Portal page refresh is an expensive action as one portlet refresh can result in the refreshing of other portlets. In(More)