XXXIII. On the controversy concerning Volta's contact force

Neutrophil adhesive contact dependence on impingement force.

Neutrophil capture and recruitment from the circulation requires the formation of specific receptor/ligand bonds under hydrodynamic forces. In the present study we examine bond formation between beta2-integrins on neutrophils and immobilized ICAM-1 while using micropipettes to control the force of contact between the cell and substrate. Magnesium was used to induce the high affinity conformatio...

Xxxiii. the Decarboxylation of Pectin

Xxxiii. the Fat of Yeast

Probably owing to the small quantity of material usually available, only one previous examination of yeast fat, that by Hinsberg and Roos [1903], appears to have been carried out, and, as this investigation was inconclusive on several points, it appeared to be worth while to go over the ground again. In an examination of yeast products for the "vitamines" or "hormones" connected with the phenom...

Finite Element Simulation of Contact Mechanics of Cancer Cells in Manipulation Based on Atomic Force Microscopy

The theory of contact mechanics deals with stresses and deformations which arise when the surfaces of two solid bodies are brought into contact. In elastic deformation contact occurs over a finite area. A regular method for determining the dimensions of this area is Hertz Contact Model. Appearance of atomic force microscope results in introduction of Contact ...

Design and Construction of a Novel Tactile Sensor for Measuring Contact-Force, Based on Piezoelectric Effect

In this paper, design and construction of a tactile sensor for measuring contact-force is presented. Mechanism of measuring contact-force in this tactile sensor is based on impedance changing of piezoelectric crystal and voltage of different points in circuit as a result of applying force on the crystal. By considering a specific point in the circuit and recording the changes of its voltage, ma...