Search results
Results from the WOW.Com Content Network
In gas chromatography, the Kovats retention index (shorter Kovats index, retention index; plural retention indices) is used to convert retention times into system-independent constants. The index is named after the Hungarian-born Swiss chemist Ervin Kováts , who outlined the concept in the 1950s while performing research into the composition ...
Example chromatogram showing signal as a function of retention time. In chromatography, resolution is a measure of the separation of two peaks of different retention time t in a chromatogram. [1] [2] [3] [4]
The retention ratio can be calculated using the following formula, essentially, the amount of dividends the company pays out divided by its net income: Retention Ratio = 1 − Dividend Payout Ratio = Retained Earnings / Net Income. This formula can be rearranged to show that the retention ratio plus payout ratio equals 1, or essentially 100%.
In chromatography, the retardation factor (R) is the fraction of an analyte in the mobile phase of a chromatographic system. [1] In planar chromatography in particular, the retardation factor R F is defined as the ratio of the distance traveled by the center of a spot to the distance traveled by the solvent front. [2]
The forgetting curve hypothesizes the decline of memory retention in time. This curve shows how information is lost over time when there is no attempt to retain it. [1] A related concept is the strength of memory that refers to the durability that memory traces in the brain. The stronger the memory, the longer period of time that a person is ...
Retention distance, or R D, is a concept in thin layer chromatography, designed for quantitative measurement of equal-spreading of the spots on the chromatographic plate and one of the Chromatographic response functions. It is calculated from the following formula:
A compact, versatile Dutch oven is crafted in France from premium cast iron for exceptional heat retention and distribution, with a smooth enamel interior. Save $220 | same price as Black Friday ...
The log P of a solute can be determined by correlating its retention time with similar compounds with known log P values. [ 40 ] An advantage of this method is that it is fast (5–20 minutes per sample).