The present invention provides compounds of the formulawhereinR is optionally substituted lower alkyl, cycloalkyl or aryl;R′ is alkyl or aryl;n is zero or an integer of 1 or 2; or an enantiomer thereof; or an enantiomeric mixture thereof.The compounds of formula (I) are bridged C2-symmetric biphenyl.....
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Heat exchange enhancement
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An AC/DC power converter includes a pair of input terminals, a boost unit, a DC/DC converter, a coupler chain, and a discharge chain. The pair of input terminals connect to a pulsating DC source. The boost unit is coupled to the input terminals and generates a voltage higher than the voltage at the .....
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A method and apparatus provide an improved EM reverberation chamber which facilitates the dynamic three dimensional (3D) manipulation of EM field polarization within the chamber and produces a uniform field distribution inside the chamber. The chamber includes one or more walls with tunable lumped e.....
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The subject invention pertains to medical apparatuses and methods for reducing or preventing leakage of injected therapeutic agents (including liquid-containing substances, cells) into a solid or hollow tissue/organ after puncturing.
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