#mechanical force

[predictoreports]

Variable Displacement Pump Market Analysis 2012-2017 and Forecast 2018-2023

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A Variable Displacement Pump is a type of mechanical-electrical motor placed in a fluid channel. Built either to generate electrical power from the natural flow of fluid past it or to apply mechanical force to make stationary fluid flow in a pipe gives the variable displacement pump a dual use — adjustable capability. Such pumps have versatile applications because they can be set to capture the maximum amount of hydraulic fluid energy as the velocity of fluid flow in a channel dynamically changes, or they can be switched to applying mechanical energy powered by electricity to increase fluid flow. The Asia-Pacific Variable Displacement Pump market will reach xxx Million USD in 2018 and CAGR xx% 2018-2023. The report begins from overview of Industry Chain structure, and describes industry environment, then analyses market size and forecast of Variable Displacement Pump by product, region and application, in addition, this report introduces market competition situation among the vendors and company profile, besides, market price analysis and value chain features are covered in this report.

[currentsinbiology]

Cells 'walk' on liquids a bit like geckos

Researchers at Queen Mary University of London have discovered that cells can 'walk' on liquids a bit like the way geckos stick to other surfaces.

Cells are typically grown on solid materials, such as tissue culture plastic, degradable polymers and bioceramics. It is thought that the strong mechanical properties of these biomaterials are required to allow cell adhesion, an important process often controlling the behaviour of stem cells and promoting implant incorporation by surrounding tissues and tissue regeneration.

In this study, published in Nano Letters, the researchers report the successful growth of skin cells at the surface of liquid oil droplets.

This is surprising as the low viscosity of liquids is not thought to support the mechanical forces generated by cells during their adhesion.

The research team discovered that protein nanosheets, films only a few nanometres thick, assemble at the surface of such liquids and display strong mechanical properties sufficient to resist cell-generated forces.

By combining different types of mechanical characterisation methods at the nanoscale, they propose that cell adhesion to such liquids is not mediated by surface tension, as in the case of the walking of water striders, but more akin to the adhesion of geckos to a wide range of surfaces, in which shear forces play an important role.

Dexu Kong et al, Protein Nanosheet Mechanics Controls Cell Adhesion and Expansion on Low-Viscosity Liquids, Nano Letters (2018). DOI: 10.1021/acs.nanolett.7b05339 

Protein nanosheet assembly displaying strong mechanical properties allow cell adhesion and proliferation at the surface of liquids. Credit: Julien Gautrot