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The abbreviation gtt or gtts comes from the Latin word gutta, meaning drop. It is used to indicate the number of drops of a liquid in medicine, cooking, or organic synthesis. The volume of a drop varies depending on the liquid and the device used to measure it.
Molar concentration is a measure of the amount of solute per unit volume of solution, usually expressed in moles per liter. Learn the definition, units, properties, and examples of molar concentration and related quantities such as molality and formality.
Learn the definition, notation, units and properties of mass concentration, a measure of the mass of a constituent in a mixture per unit volume. Find out how it relates to density, molar concentration, mass fraction and other related quantities.
Glomerular filtration rate (GFR) is the volume of fluid filtered from the kidney glomeruli per unit time. It is a measure of kidney function and can be calculated or estimated using various methods, such as creatinine clearance, inulin, or radioactive tracers.
A colony-forming unit (CFU) is a unit that estimates the number of viable microbial cells in a sample that can multiply under controlled conditions. Learn about the theory, methods, uses and tools for counting CFUs in microbiology.
The following equation is used to calculate the number of colony forming units (CFU) per ml from the original aliquot / sample: CFU per ml = Average number of colonies for a dilution x 50 x dilution factor. Advantages. Faster than other methods. Produce less bacterial contamination of the working surface.
Learn about the meaning and usage of parts-per notation, a set of pseudo-units to describe small values of dimensionless quantities. Find out how to convert between parts-per notation and other units, and see examples of applications in chemistry, physics, engineering and NMR.
The key quantities are then the pressure drop along the pipe per unit length, Δp / L , and the volumetric flow rate. The flow rate can be converted to a mean flow velocity V by dividing by the wetted area of the flow (which equals the cross-sectional area of the pipe if the pipe is full of fluid).