Word: celle
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...most of the effects of the whole virus, but it is a thousand times less powerful. Evidently, the researchers suggest, the virus needs to be "carefully packaged for safe transmission." One effective package design is like a tadpole: the virus uses its tail as a stinger to pierce the cell and inject the nucleic acid. Researchers at the National Cancer Institute have just reported photographic evidence that this is the mode of attack used by a mouse leukemia virus...
Shadows in a Cell. When Munch began painting, the great new movement was impressionism. Though Munch admired and benefited from this exploration into the mysteries of light, he himself was concerned with "shadows and movements, such shadows as a prisoner sees in his cell, those curious grey streaks of shadows which flee and then return, which slide apart and come together again like fans, bending, curving, dividing." In almost all his canvases there is such tension and vibration that even a bright landscape like Midsummer Night (see color) seems about ready to disintegrate into tragedy. For Munch, nature was filled...
...cocktail-party bore who laces his chatter with the tiresome cliche about "crazy, mixed-up women" has more medical science on his side than he knows-and more than medical scientists themselves have recognized until recently. Even normal women, it appears, are mixtures of two different types of cells, or what the researchers call "genetic mosaics." If both cell types are normal, so is the woman. But if one is defective, though a woman may seem to enjoy good health herself, she may pass on hereditary disorders to her children. And oddly, the victims will nearly always be her sons...
From what they have slowly and painstakingly pieced together about mosaicism in female cells, medical geneticists are getting a better understanding of several inherited disorders including some forms of anemia and hemophilia, and color blindness. The research has a direct bearing on cases of genetically confused sex, in which both males and females may have an extra female sex chromosome. And this in turn may have surprising importance in mental deficiency, in which sex-chromosome abnormalities are now being detected more often. The cell studies are also tied in with some forms of cancer, especially a form of chronic leukemia...
Exquisite Chemistry. Geneticists who looked through microscopes at chromosomes taken from cell nuclei had noticed long ago that in some of their slides there was an unusually dark spot. Not until 1949 did Canada's Dr. Murray Llewellyn Barr realize that the spot appeared only in female cells. This discovery alone was invaluable for determining the true or nuclear sex in many cases involving various degrees of hermaphroditism.* But what was the spot...