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The Scherrer equation, in X-ray diffraction and crystallography, is a formula that relates the size of sub-micrometre crystallites in a solid to the broadening of a peak in a diffraction pattern. It is often referred to, incorrectly, as a formula for particle size measurement or analysis. It is named after Paul Scherrer.
Plant cellulose, which makes up the cell walls of most plants, is a tough, mesh-like bulkwork in which cellulose fibrils are the primary architectural elements. While bacterial cellulose has the same molecular formula as plant cellulose, it has significantly different macromolecular properties and characteristics. [ 8 ]
Cells lining the small intestine increase the surface area over which they can absorb nutrients with a carpet of tuftlike microvilli. The ratio between the surface area and volume of cells and organisms has an enormous impact on their biology, including their physiology and behavior. For example, many aquatic microorganisms have increased ...
Sedimentation time is longest for the finest particles, so this technique is useful for sizes below 10 μm, but sub-micrometer particles cannot be reliably measured due to the effects of Brownian motion. Typical apparatus disperses the sample in liquid, then measures the density of the column at timed intervals.
The micrometre (Commonwealth English as used by the International Bureau of Weights and Measures; [1] SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, [2] is a unit of length in the International System of Units (SI) equalling 1 × 10 −6 metre (SI standard prefix "micro-" = 10 −6); that is, one millionth of a metre (or one thousandth of a ...
DAMASCUS/LATAKIA, Syria (Reuters) -Syrian Christians attended regular Sunday services for the first time since the dramatic overthrow of President Bashar al-Assad a week ago, in an early test of ...
Size of a bee hummingbird compared to a human hand With a mass of approximately 1.95 grams (0.069 oz) and a length of 5.5 centimetres (2.2 inches), the bee hummingbird ( Mellisuga helenae ) is the smallest known dinosaur as well as the smallest bird species, and the smallest warm-blooded vertebrate .
Amber Heard is expanding her family.. The Aquaman actress, 38, is expecting her second baby, PEOPLE can exclusively confirm. A spokesperson for Heard says, "It is still quite early in the ...