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The swelling behavior of pH sensitive polymer particles has been investigated by embedding the particles in a polyvinylalcohol (PVA) hydrogel membrane. Changes of one-half of an absorbance unit in the turbidity of the hydrogel membrane were observed as a result of the swelling and shrinking of the polymer particle in response to changes in the pH of the solution in contact with the membrane. The PVA...
The construction of an inexpensive SPR instrument that can be used for both teaching and research is described. Using a 2′×2′ optical table to construct this instrument allows both scientists and students full access to the operation of the spectrometer. Furthermore, the use of open platform instrumentation has the advantage of maintaining the focus on the relationship between emerging technology...
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