منابع مشابه
An exit exchanger
he protozoan parasite Toxoplasma gondii heads out of its host cell when Ca 2 ϩ levels peak in its cytoplasm. Now, Arrizabalaga et al. (page 653) find that proper regulation of these Ca 2 ϩ levels, and thus of Toxoplasma exit, requires a Na ϩ /H ϩ exchanger (NHE), suggesting a link between proton and Ca 2 ϩ regulation. The increase in Ca 2 ϩ levels, which can be induced artificially with an iono...
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The typical installation of a heat exchange device usually involves a flow contraction at the core entrance and a flow expansion at the core exit. Repeated flow Contraction and expansion are experienced in the flow passages of some compact heat exchangers. The latter refers to the flow passages in the plate-fin type with louvered fins or stripped fins and in the tubular type with dimpled-circul...
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Measurements of three-dimensional turbulent flow in the exit head section of a shell-andtube heat exchanger were performed using three-component laser Doppler velocimeter. The test geometry is half of a hemispherical cap with two outlet-tubes and with a cylindrical inlet section. Distributions of the velocity vector field, the three mean velocity components, and the Reynolds stress components a...
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Recent theory posits a new corporate governance channel available to blockholders: the threat of exit. Threats, however, are distinct from actual exits and thus difficult to measure directly. This paper exploits financial crises as natural experiments that exogenously changed stock liquidity and thus the credibility of blockholder exit threats. During these crises, firms with larger blockholder...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 2004
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb1655iti3