Word: cellsã
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Beneath the film that Parker developed, cells can grow, and when they bunch up, scientists can measure and observe the cells??€™ transition from a mere collection of cells to actual muscle tissue...
Kassis’ test looks to circulating tumor cells??€”any tumor, no matter how small, sheds tumor cells into the bloodstream. These cells typically die on their own, and are cleaned up by phagocytes—a type of white blood cell. The test examines whether markers of ingested tumor cells are detectable in the patient’s phagocytes. The results are then compared to an non-phagocytic white blood cells, such as lymphocytes. Kassis said that he conceived of this approach due to his background in immunology. While this field is typically far removed from radiology...
...researchers packaged various combinations of compounds into liposomes—fat-and-lipid based particles found in cells??€”and injected the slow release anesthetic drug-delivery systems into rats to examine their effects...
...measures separate Bush’s ethical ideology from the truth of stem cell research. The ethical arguments levied against stem cells are unconvincing. The use of stem cells is not a destruction of human life. The embryos from which these cells are cultivated are merely a collection of cells??€”with no moral status as persons—and would otherwise be discarded. Yet, the use of this collection of cells could have life-saving implications. The restrictive policies of the previous administration allowed religious beliefs to hinder scientific advancement. Moreover, due to the limitations of the past...
...unethical because it requires the destruction of embryos—had been constrained by a 2001 order from President Bush that limited funding to research using only the 21 cell lines existing at the time of his directive. Critics of that restriction have long contended that embryonic stem cells??€”believed to be capable of morphing into any body tissue cells??€”merit federal support because they could lead to new treatments for degenerative diseases, such as Parkinson’s. Once Obama signs the executive order, researchers at the Harvard Stem Cell Institute will be able...