排序方式: 共有6条查询结果,搜索用时 0 毫秒
1
1.
SEARCHING FOR PHYTOCHROME MUTANTS 总被引:2,自引:0,他引:2
2.
3.
Li D Jung YS Tan S Kim HK Chory E Geller DA 《Journal of colloid and interface science》2011,358(1):47-53
We report quantitative measurement of heat generation in Au-nanoparticle colloidal solutions induced by radiofrequency (RF) electromagnetic waves (13.56 MHz; 25 W). The possible role of Au nanoparticles in RF heating was systematically investigated by separating the metal nanoparticles away from the colloidal solutions by centrifugation. Contrary to the previously made assumption in this field, it is found that Au nanoparticles do not contribute to RF energy absorption. The electrical conductivity measurement of the solutions with and without Au nanoparticles reveals that the Joule heating via ionic conduction in the electrolyte solutions is the dominant mechanism of RF-radiation-to-thermal conversion. 相似文献
4.
To isolate clinically and biologically relevant cell types from a heterogeneous population, fluorescent or magnetic tagging together with knowledge of surface biomarker profiles represents the state of the art. To date, it remains exceedingly difficult to separate phenotypically and physically similar cell types from a mixed population. We report a microfluidic platform engineered to separate two highly similar cell types using a single antibody by taking advantage of subtle variations in surface receptor density and cell size. This platform utilizes antibody-conjugated surfaces in microfluidic channels together with precise modulation of fluid shear stresses to accomplish selective fractionation in a continuous flow process. Antibody conjugation density variation on the adhesive surfaces is achieved by covalently immobilizing an antibody in the presence of poly(ethylene glycol). This platform is used to demonstrate separation of two CD31 positive cell types, human umbilical vein endothelial cells and human micro vascular endothelial cells. 相似文献
5.
Bert De Rybel Dominique Audenaert Grégory Vert Wilfried Rozhon Juliane Mayerhofer Frank Peelman Silvie Coutuer Tinneke Denayer Leentje Jansen Long Nguyen Isabelle Vanhoutte Gerrit T.S. Beemster Kris Vleminckx Claudia Jonak Joanne Chory Dirk Inzé Eugenia Russinova Tom Beeckman 《Chemistry & biology》2009,16(6):594-604
6.
Bifurcations from an invariant circle for two-parameter families of maps of the plane: A computer-assisted study 总被引:6,自引:0,他引:6
D. G. Aronson M. A. Chory G. R. Hall R. P. McGehee 《Communications in Mathematical Physics》1982,83(3):303-354
We consider a two-parameter family of maps of the plane to itself. Each map has a fixed point in the first quadrant and is a diffeomorphism in a neighborhood of this point. For certain parameter values there is a Hopf bifurcation to an invariant circle, which is smooth for parameter values in a neighborhood of the bifurcation point. However, computer simulations show that the corresponding invariant set fails to be even topologically a circle for parameter values far from the bifurcation point. This paper is an attempt to elucidate some of the mechanisms involved in this loss of smoothness and alteration of topological type. 相似文献
1