Study on utilization and protection of resources of Ephedra Tourn. ex L. in Inner Mongolia Effect of Herba Ephedrae Decoction on levels of amino acid neurotransmitters in prefrontal cortex of rats Effects of among compositions of Herba Ephedrae decoction on genic xpression of 5-lipoxygenase activating protein,IL-4 and leukotriene C4 in asthmatic mice Determination of ephedrine and pseudoephedrine in Herba Ephedrae and Maxing Shigan Tang by capillary zone electrophoresis