منابع مشابه
Shrink-wrap vesicles.
We describe a simple approach to the controlled removal of molecules from the membrane of large unilamellar vesicles made of fatty acids. Such vesicles shrink dramatically upon mixing with micelles composed of a mixture of fatty acid and a phospholipid (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC)), as fatty acid molecules leave the vesicle membrane and accumulate within the mixed mi...
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Iterated Function Systems (IFSs) are among the best-known methods for constructing fractals. The sequence of pictures E0; E1; E2; : : : generated by an IFS fX; f1; f2; : : : ; ftg converges to a unique limit E , which is independent of the choice of starting set E0, but completely determined by the choice of the maps fi. Random context picture grammars (rcpgs) are a method of syntactic picture ...
متن کاملGenomes on the shrink.
B ecause genetic events do not fossilize, we are forced to deduce the evolution of bacterial genomes by comparing the features of contemporary organisms. This comparative approach has exposed many of the alterations endured by bacterial genomes (bouts of expansion and contraction or changes in base compositions), but such reconstructions are often imprecise, and sometimes incorrect, because the...
متن کاملTo grow or to shrink…
Aurora B puts chromosomes in their place mall molecule inhibitors of Aurora B activity, characterized by Hauf et al. (page 281) and Ditchfield et al. (page 267), reveal that the mammalian kinase and its budding yeast counterpart, Ipl1, have similar functions. Without Aurora B, mistakes in kinetochore–chromosome interactions go uncorrected. Early evidence of a function for the Aurora family in c...
متن کاملLymphocytes shrink to stay fit
In response to an infection, proinfl ammatory cytokines stimulate lymphocytes to take up nutrients so that they can proliferate and mount an immune response. Once the infection is cleared, however, cytokine levels decline and the lymphocytes’ nutrient supply is abruptly cut off. Most of the cells quickly die by apoptosis, but a small fraction survive and differentiate into longlived memory cell...
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ژورنال
عنوان ژورنال: The Iowa Review
سال: 2001
ISSN: 0021-065X,2330-0361
DOI: 10.17077/0021-065x.5363