Dielectric analysis of aqueous poly(L-glutamic acid) and poly-L-(glutamic acid4, Tyrosine1) solutions at high frequencies from capacitance measurements

A new parallel-plate capacitor fixture has been designed and successfully used to measure dielectric loss of polyelectrolyte solutions with volumes as low as droplets of 13e26 mL. It is particularly useful when studying polypeptides that are either high-cost or can be synthesized only in limited quantities.