THE scale method is still regarded as the most accurate and reliable method for measuring refractive index gradients and is extensively used in diffusion and sedimentation measurements. The ...

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Based on highly accurate optical interferometry and fundamental quantum calculations, researchers in the US are developing an improved definition of the SI unit for pressure that will consign the ...

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Horiba has developed a particle size distribution measuring device that accurately measures particle size distribution even in the presence of similar-shaped particles. The device uses image ...