This paper reports the development of a lead-free brush material for high-load starter motors. These brushes can be used in much more extreme conditions --at a PV-value (the product of the brush contact pressure and sliding velocity) approximately three times that of conventional starter motor brushes, and double the electrical current density. The major technical requirement for this developme...

We propose the design of a novel mixed polymer brush system that could act as a selective sensor with a distinct on-off switch. In the proposed system, a (single) nanoparticle (such as an antibody) is end-attached to a responsive chain, which is surrounded by a brush of nonresponsive chains. The collapse of the responsive chain leads to a protected state, where the nanoparticle is hidden in the...

We present the results of discontinuous molecular dynamics simulations of mechanically assembled monolayers in good solvent. Polymers of chain lengths 5-100 were end-grafted to surfaces at low density and then compressed laterally at varying rates. Data for brush thickness and end-monomer density were collected as a function of surface density; they were shown to correspond well with theoretica...

This paper proposes a novel algorithmic framework for an advanced virtual brush to be used in interactive digital painting. The framework comprises the following components: a geometry model of the brush using a hierarchical representation that leads to substantial savings in every step of the painting process; fast online brush motion simulation assisted by offline calibration that guarantees ...

iron oxide, [ 10 ] zinc oxide, [ 11 ] cadmium selenide, [ 12 ] gold [ 13 ] and others in nanocomposites is a promising approach to introduce new functionalities to a polymer such as tunable refractive index, magnetism, surface hardness, UV absorption, etc. However, aggregation of nanoparticles is commonly encountered, leading to unsatisfactory performance of nanocomposites and frustrating effor...

Morphological transformations in polymer brushes in a binary mixture of good and bad solvents are studied using dissipative particle dynamics simulations drawing on a characteristic example of polyisoprene natural rubber in an acetone-benzene mixture. A coarse-grained DPD model of this system is built based on the experimental data in the literature. We focus on the transformation of dense, col...

The atomic force microscope is broadly used to study the morphology of cells, but it can also probe the mechanics of cells. It is now known that cancerous cells may have different mechanical properties to those of normal cells, but the reasons for these differences are poorly understood. Here, we report quantitatively the differences between normal and cancerous human cervical epithelial cells ...

1. Brush borders were isolated from rabbit kidney-cortex homogenates by rate-zonal centrifugation through a sucrose density gradient in a B-XIV zonal rotor, followed by differential centrifugation. 2. The method of preparation gave brush borders of high purity with a reasonable yield. The morphological appearance supported the evidence from enzymic and chemical investigations, that the brush bo...

In the companion paper (M. D. Peterson and M. S. Mooseker (1993). J. Cell Sci. 105, 445-460) we describe a method for modeling brush border assembly in the Caco-2BBe clones. In this study we have examined the molecular changes accompanying cell contact-induced brush border assembly. A subset of brush border proteins was tracked throughout brush border assembly by immunoblotting and by immunoflu...