Abstract:
:A mathematical model has been developed to investigate previously obtained experimental findings relating to the activation of factor X by surface-bound tissue factor--factor VIIa (TF:VIIa) in a tubular flow reactor. In those experiments, factor X was perfused through a microcapillary tube over a range of flow (shear) conditions and the activated product, factor Xa, was measured at the outlet of the tube using a chromogenic assay. In the present study, the steady-state convection-diffusion equation with Michaelis-Menten kinetics used to describe the reaction at the wall was numerically integrated using an implicit method based on linear systems of ordinary differential equations. The results from the numerical analysis indicated that shear rate directly affects both Km and Vmax. Values of Km decreased from 151 to 16 nM as the shear rate increased from 25 to 2400 sec-1. Additionally, there was a twofold increase in Vmax from 1.4 to 3.0 pmol/cm2/min as the shear rate increased from 25 to 300 sec-1. These findings are in contrast with classical enzyme behavior and imply a direct effect of fluid flow on the kinetics of factor X activation.
journal_name
Ann Biomed Engjournal_title
Annals of biomedical engineeringauthors
Gir S,Slack SM,Turitto VTdoi
10.1007/BF02660888subject
Has Abstractpub_date
1996-05-01 00:00:00pages
394-9issue
3eissn
0090-6964issn
1573-9686journal_volume
24pub_type
杂志文章abstract::Similarities between photoreceptor Kx channels and EAG and KCNQ channels suggest that the Kx channel may be related to one or both of these families of potassium channels. To provide a basis for further comparison of these channels, as well as to reveal the role of zinc (endogenously present in photoreceptors) in Kx c...
journal_title:Annals of biomedical engineering
pub_type: 杂志文章
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章,评审
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journal_title:Annals of biomedical engineering
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journal_title:Annals of biomedical engineering
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doi:10.1007/s10439-013-0794-6
更新日期:2013-07-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章,评审
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journal_title:Annals of biomedical engineering
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doi:10.1007/s10439-010-0225-x
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journal_title:Annals of biomedical engineering
pub_type: 临床试验,杂志文章
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/BF02584215
更新日期:1983-01-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/s10439-016-1662-y
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journal_title:Annals of biomedical engineering
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journal_title:Annals of biomedical engineering
pub_type: 临床试验,杂志文章
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/BF02368415
更新日期:1990-01-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/s10439-011-0293-6
更新日期:2011-07-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/s10439-020-02658-y
更新日期:2020-11-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
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更新日期:2014-03-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/s10439-016-1781-5
更新日期:2017-05-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/BF02368298
更新日期:1995-01-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/s10439-016-1647-x
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journal_title:Annals of biomedical engineering
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journal_title:Annals of biomedical engineering
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journal_title:Annals of biomedical engineering
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
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更新日期:2004-08-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章,评审
doi:10.1007/s10439-015-1413-5
更新日期:2016-02-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/s10439-006-9157-x
更新日期:2006-09-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 临床试验,杂志文章
doi:10.1007/s10439-012-0615-3
更新日期:2012-12-01 00:00:00
abstract::Kiani et al. (Kiani, M. F., A. R. Pries, L. L. Hsu, I. H. Sarelius, and G. R. Cokelet, Am. J. Physics. 266: H1822-H1828, 1994) suggested that blood velocity, hematocrit, and nodal pressures can oscillate spontaneously in large microvascular networks in the absence of biological control. This paper presents a model of ...
journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1114/1.1306346
更新日期:2000-06-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/s10439-008-9530-z
更新日期:2008-09-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 杂志文章
doi:10.1007/BF02367387
更新日期:1982-01-01 00:00:00
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journal_title:Annals of biomedical engineering
pub_type: 临床试验,杂志文章
doi:10.1114/1.1481051
更新日期:2002-05-01 00:00:00