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This method is used to find depletion force strength by adhering to a static plate one particle in a dispersion particle doublet and applying shear force through fluid flow. The drag created by the dispersion particles resists the depletion force between them, pulling the free particle away from the adhered particle.
The Hubbert curve [2] is the first derivative of a logistic function, which has been used for modeling the depletion of crude oil in particular, the depletion of finite mineral resources in general [3] and also population growth patterns. [4] Example of a Hubbert Linearization on the US Lower-48 crude oil production.
In nuclear physics, the Bateman equation is a mathematical model describing abundances and activities in a decay chain as a function of time, based on the decay rates and initial abundances. The model was formulated by Ernest Rutherford in 1905 [ 1 ] and the analytical solution was provided by Harry Bateman in 1910.
Enantioselective synthesis, also called asymmetric synthesis, [1] is a form of chemical synthesis.It is defined by IUPAC as "a chemical reaction (or reaction sequence) in which one or more new elements of chirality are formed in a substrate molecule and which produces the stereoisomeric (enantiomeric or diastereomeric) products in unequal amounts."
Starting fractionation immediately after sample injection is not ideal because the sample is going to spread out randomly from the injection site, so the beginning velocity and place of the particles are not all the same. This leads to line broadening and insufficiency. In order to correct such an error, sample focusing is proposed. 2. Sample ...
Fick's first law relates the diffusive flux to the gradient of the concentration. It postulates that the flux goes from regions of high concentration to regions of low concentration, with a magnitude that is proportional to the concentration gradient (spatial derivative), or in simplistic terms the concept that a solute will move from a region of high concentration to a region of low ...
Similar to the continuous-flow method, the time between mixing and quenching can be adjusted by varying the length of the reaction tube. Comparison of stopped flow with quenched flow for nitrogenase from Klebsiella pneumoniae. The pulsed quenched-flow method, introduced by Alan Fersht and Ross Jakes, [9] eliminates the need for a long reaction ...
The Noyori asymmetric hydrogenation of ketones is an excellent example of dynamic kinetic resolution at work. The enantiomeric β-ketoesters can undergo epimerization , and the choice of chiral catalyst, typically of the form Ru[(R)-BINAP]X 2 , where X is a halogen , leads to one of the enantiomers reacting preferentially faster.