Cut unkind to chemistry
نویسندگان
چکیده
منابع مشابه
HIV’s unkind cut
Enzyme helps fold the SAC E spert et al. identify a phosphatase that helps shut down the spindle assembly checkpoint (SAC) when chromosomes are correctly attached to the spindle. The SAC prevents cells from entering anaphase until they have verifi ed the connections between spindle microtubules and the chromosomes. The checkpoint forms when the enzyme Mps1 phosphorylates the kinetochore protein...
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acres, and you enjoy a variety of activities on your land: watching wildlife, hiking, hunting, picking berries, picnicking or taking photos of wildlife and wildflowers. You delight in the beauty and solitude that comes with owning a woodland. You warm yourself in late fall and winter by cutting a little firewood, and you wouldn’t mind making a little extra cash, though managing your woodland fo...
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Let $G$ be a weighted digraph, $s$ and $t$ be two vertices of $G$, and $t$ is reachable from $s$. The logical $s$-$t$ min-cut (LSTMC) problem states how $t$ can be made unreachable from $s$ by removal of some edges of $G$ where (a) the sum of weights of the removed edges is minimum and (b) all outgoing edges of any vertex of $G$ cannot be removed together. If we ignore the second constraint, ca...
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hile studying the stress response of yeast cells, Jacquet et al. (page 497) discovered a new type of oscillatory process that can control gene expression. In addition to creating a computational model that should help to direct future studies of cell stress, the authors identified a sort of biological Heisenberg effect, in which the process of observing certain cells under the microscope could ...
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I n this paper we show how mathematics can illuminate the study of cake-cutting in ways that have practical implications. Specifically, we analyze cake-cutting algorithms that use a minimal number of cuts (n − 1 if there are n people), where a cake is a metaphor for a heterogeneous, divisible good, whose parts may be valued differently by different people. These algorithms not only establish th...
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ژورنال
عنوان ژورنال: Nature
سال: 1990
ISSN: 0028-0836,1476-4687
DOI: 10.1038/344372a0