Density Meter Utilizing Pressure Gradient Variation

Experiences with a Density Meter

The use of this instrument, utilising galvanic action to indicate the density of massecuite as a guide to crystallization in sugar-boiling vacuum pans and its construction from cheap and readily available materials are enlarged upon. Difficulties experienced in the instrument's successful operation are enumerated and the means of overcoming these are set forth as a guide to present and future o...

variation of cholesterol, phospholipid and triacylglycerol content in subsets of human spermatozoa isolated by density gradient.

objectives lipid components of spermatozoa have an important role in its functional activity. in this study the concentration of cholesterol, phospholipid, triacylglycerol and total lipid in different subsets of human spermatozoa, isolated as three fractions by a discontinuous puresperm gradient, was determined. methods aliquots of the liquefied semen samples (n=107) were layered on top of the ...

Effect of Material Gradient on Stresses of FGM Rotating Thick-Walled Cylindrical Pressure Vessel with Longitudinal Variation of Properties under Non-uniform Internal and External Pressure

The present paper provides a semi-analytical solution to obtain the displacements and stresses in a functionally graded material (FGM) rotating thick cylindrical shell with clamped ends under non-uniform pressure. Material properties of cylinder are assumed to change along the axial direction according to a power law form. It is also assumed that the Poisson’s ratio is constant. Given the exist...

Super-high density Si quantum dot thin film utilizing a gradient Si-rich oxide multilayer structure.

A gradient Si-rich oxide multilayer (GSRO-ML) deposition structure is proposed to achieve super-high density Si quantum dot (QD) thin film formation while preserving QD size controllability for better photovoltaic properties. Our results indicate that the Si QD thin film using a GSRO-ML structure can efficiently increase the QD density and control the QD size. Its optical properties clearly pro...

Preparative Density Gradient Centrifugations