Sun, 20 Jul 2008 13:44:12 BST CiteULike: matthewhflamm Chatterjee http://www.citeulike.org/user/matthewhflamm/author/Chatterjee CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/matthewhflamm/article/2682989 <i>Blood, Vol. 111, No. 7. (1 April 2008), pp. 3507-3513.</i><br /><br />Protein microarrays presenting spots of collagen and lipidated tissue factor (TF) allowed a determination of the critical surface concentration of TF required to trigger coagulation under flow. Whole blood supplemented with corn trypsin inhibitor (to inhibit factor XIIa) was perfused over microarrays for 5 minutes. Immunofluorescence staining of platelet glycoprotein GPIbalpha and fibrin(ogen) revealed a critical TF concentration (EC50) of 3.6, 8.4, and 10.2 molecules-TF/microm2 at wall shear rates of 100, 500, and 1000 s1, respectively. For collagen arrays where only the center lane of spots (in the direction of flow) contained TF, a downstream distance of 14 mm was required for the thrombus to widen enough to reach across a 300-micrometer gap to the adjacent TF-free lanes of collagen spots, in agreement with numerical simulation. To investigate the effect of low levels of circulating TF, whole blood (+/- 100 fM added TF) was tested under static and flow conditions. After 5 minutes, the addition of 100 fM TF to whole blood had negligible effect under static conditions, but caused a 2.5-fold increase in fibrin formation under flow. This report defines the threshold concentrations of surface TF required to trigger coagulation under flow. 10.1182/blood-2007-08-106229 Determination of surface tissue factor thresholds that trigger coagulation at venous and arterial shear rates: amplification of 100 fM circulating tissue factor requires flow Uzoma Okorie William Denney Manash Chatterjee Keith Neeves Scott Diamond doi:10.1182/blood-2007-08-106229 Blood, Vol. 111, No. 7. (1 April 2008), pp. 3507-3513. 2008-04-17T17:16:41-00:00 2008 Blood 111 7 3507 3513 flow tissue_factor http://www.citeulike.org/user/matthewhflamm/article/2599272 <i>Computers & Chemical Engineering, Vol. 29, No. 4. (15 March 2005), pp. 701-712.</i><br /><br />A technique, termed net-event kinetic Monte Carlo (NE-KMC), is presented for overcoming large disparities in time scale that may render conventional KMC inefficient or intractable when fast reversible processes exist. The success of this approach derives from the consolidation of fast reversible processes into single "net events". The resulting self-regulating method appropriately samples rare events even when partial equilibrium (PE) exists between fast reversible microscopic processes. Moreover, we show that computational savings over conventional KMC are proportional to the separation in time scales between the fast reversible process and rare events. We illustrate the capabilities of this new technique for a homogeneous series reaction system, and extend the net-event concept to distributed systems where multiple microscopic processes occur simultaneously. In a culminating example, we combine the time and length scale capabilities of NE-KMC and adaptive coarse-grained MC, respectively, to stochastically model diffusion through a realistically thick membrane. Net-event kinetic Monte Carlo for overcoming stiffness in spatially homogeneous and distributed systems MA Snyder A Chatterjee DG Vlachos doi:10.1016/j.compchemeng.2004.09.016 Computers & Chemical Engineering, Vol. 29, No. 4. (15 March 2005), pp. 701-712. 2008-03-26T17:36:49-00:00 2005 Computers & Chemical Engineering 29 4 701 712 cg_kmc kmc stiff http://www.citeulike.org/user/matthewhflamm/article/2552054 <i>The Journal of Chemical Physics, Vol. 124, No. 6. (2006)</i><br /><br />View This Record in Scopus Multiscale spatial Monte Carlo simulations: Multigriding, computational singular perturbation, and hierarchical stochastic closures Abhijit Chatterjee Dionisios Vlachos The Journal of Chemical Physics, Vol. 124, No. 6. (2006) 2008-03-18T16:49:06-00:00 2006 The Journal of Chemical Physics 124 6 AIP no-tag