Iâve come across a historical footnote on the English language and I thought everyone would get a kick out of it. Up until about 2 hundred years ago, there was a 27th letter in the English language. This letter is still in common use today and I would bet that you have used it recently. But this letter is no longer considered a letter; it is now regarded either an abbreviation or punctuation. Iâm talking about the (&) ampersand.
Gneiss is a medium to coarse-grained, irregularly banded rock with only poorly developed cleavage. The light and dark bands (gneissic banding) are alternations of felsic vs. mafic layers. Slate is a product of low grade metamorphism (not terribly great burial temperatures and pressures are required).
Particle size control : - Particle size of any suspension is critical and must be reduced within the range. -Too large or too small particles should be avoided. Larger particles will: Too fine particles will easily form hard cake at the bottom.Suspensions having particle sizes of greater than about 1micron in diameter are called as coarse suspensions.Â¾Suspensions are the biphasic colloidal dispersions of nanosized drug particles stabilized by surfactants. Â¾Size of the drug particles is less than 1mm. Nano suspensions (10 ng).