Papers – Page 971 – TechConnect Briefs

Separation of Long Polyelectrolytes in a Microfuluidic Channel with Constrictions: A Monte Carlo Study

Tessier F., Slater G.W., University of Ottawa, CA

We present Monte Carlo simulation results for the motion of long linear polyelectrolytes inside a microchannel of molecular dimensions, structured as a periodic array of wells linked by narrow constrictions. Molecules are driven in the [...]

Squeezing Flow of Particles and Large Molecules Suspended in a Liquid Through Nanochannels

Acrivos A., Khusid B., Koplik J., Drazer G., New Jersey Institute of Technology, US

The presentation addresses the status of current understanding of the hydrodynamic phenomena accompanyin the motion of a nanometer-sized particle through a nanotube.

Direct Numerical Simulation of Moving Charged, Flexible Bodies with Thermal Fluctuations

Patankar N.A., Northwestern University, US

The interaction of sub-micron scale objects with fluids is an important problem encountered in miniaturized systems. Various physical phenomena should be modeled simultaneously for a fundamental investigation of these systems. Our objective is to develop [...]

Transient Analysis of Electroosmotic Flow in Nano-diameter Channels

Qiao R., Aluru N.R., University of Illinois at Urbana-Champaign, US

Transient analysis of electroosmotic flow in a nano-diameter channel is presented. The time for flow to reach steady state in a nano-diameter channel for various Debye lengths is investigated by solving the Navier-Stokes equations in [...]

Numerical and Analytical Studies of AC Electric Field in Dielectrophoretic Electrode Arrays

Feng J.J., Krishnamoorthy S., Chen Z.J., Makhijani V.B., CFD Research Corporation, US

Manipulation of micro-sized particles and biological cells using dielectrophoresis (DEP) is an emerging technique in MEMS and nano technology[3]. This paper presents an exact solution of dielectrophoretic motion of a polarized particle in the vicinity [...]

Nanomolecular Gravitational Interactions Causing Incrased Probability of Birth Defects in Humans During Period from Conception to Early Fetus Formation

Vezzoli G.C., The Franklin Institute of Technology, US

It is found that small decreases in gravity that are caused by planet syzygy, full moon presence, and cosmogonic events of deep space can cause a sufficient change in gravitational interactions to affect the nucleons [...]

11-cis-Retinal Protonated Schiff Base: The effect of environment and solvent on the chromophore of rhodopsin

Entel P., Sugihara M., Buß V., Elstner M., Frauenheim Th., Gerhard-Mercator-Universität, DE

Recently the structure of rhodopsin was determined from the X-ray diffraction data extending to the resolution of 2.8 A. We have studied the effects of amino acids and of water using A density functional based [...]

Modeling of the Deformation of Living Cells Induced by Atomic Force Microscopy

Rudd R.E., McElfresh M., Baesu E., Balhorn R., Alleny M., Belak J., Lawrence Livermore National Lab., US

We describe finite element modeling of the deformation of living cells by atomic force microscopy (AFM). Cells are soft systems, susceptible to large deformations in the course of an AFM measurement. Often the local properties, [...]

Molecular, Surface and Continuum Issues in the Capture of Bacteria Particles by Solid Aerosols

Kohlberg I., Boezer G., Greer W., Good R., Institute for Defense Analyses, US

In this study, we develop the design parameters required to remove airborne biological particles by impact with scavenging aerosols. The conditions for capturing air-borne biological particles for a head-on collision are deter-mined as a function [...]

Structure-function study of Porins

Chen D.P., Tang J., Eisenberg R.S., Rush Medical College, US

Single channel current-voltage (IV) relations were measured from proteins that form channels across the outer membranes of Gram-negative bacteria-porins and their mutants in solutions of KCl. The wild-type porins and some of their specific mutants [...]