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InGaAs/InP double heterojunction bipolar transistors (DHBTs) with non-abrupt junctions have been utilized to achieve a high efficiency class-AB CDMA power amplifier (PA). InGaAs/InAlAs superlattice layers are inserted at the emitter-base junction and the base-collector junction to remove abrupt barriers in the conduction band. These non-abrupt junctions provide a low knee voltage in collector current-voltage...
The interactions of benzalkonium chloride (BC)with components of stratum corneum, a model system of intercellular lipids in human stratum corneum and homogenized rat stratum corneum were characterized in terms of thermodynamics at pH 7.5 and 37°C. BC was strongly bound to cholesterol and cholesterol sulfate with higher affinities (105~106 M-1) than to any other components of the stratum corneum by...
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