نتایج جستجو برای: concentration gradient method
تعداد نتایج: 2036316 فیلتر نتایج به سال:
We report a general diffusion based method to form micrometer-scale lateral chemical gradients in polymer brushes via selective alkylation. A quaternized brush gradient is derived from a concentration gradient of alkylating agent formed by diffusion in permeable media around a microchannel carrying the alkylating agent. Polymer brushes containing both charge and aromatic gradients are formed us...
The class of equilibrium gradient methods utilizes the opposition of two forces, at least one of which changes in magnitude with position, to separate and concentrate analytes. The drawback of many methods of this type is that the production of two opposing forces requires in comparison to standard methods, such as capillary electrophoresis, a relatively complex apparatus. In addition, for tech...
OF THE DISCLOSURE A method and device are provided for affinity gradient focusing for directing at least one analyte in a solution containing a pseudostationary phase and located in a conduit or microchannel. The method includes establishing a gradient in a retention factor of the pseudostationary phase for the at least one analyte. The analyte is caused to be moved within the conduit whereby t...
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