In the weihe valley , the environmental effect of the summer monsoon on the south is much stronger than that on the north in the holocene megathermal , which is result forming deferent structure of paleosoil ( so ) at the mjy - a site and the wsc site : at the mjy - a she , the paleosoil ( so ) belongs to typical semiarid grasslands soil - heilu soil with apb - ah - bk - c soil sectional structure ; at the mjy - a site , the paleosoil ( so ) belongs to typical semi7humid forest soil - brown soil with ah - b1 - ck - c soil sectional structure 具体表现在合水与户县大暖期强成壤阶段形成的古土壤（ s 。 ）剖面构型上：北部古土壤为典型的半干旱草原土壤一黑炉土，具有apb叭hek （土壤剖面构型：南部户县剖面古土壤（ s 。 ）为典型的半湿润森林土壤一褐土，其so具有ah bt ck c土壤会面构型。
Moreover , chloride channel blockers , dids and sits , also significantly prevented sts - induced neuronal cell death . with whole - cell patch - clamp recordings , we found chloride channel currents increased significantly with time when holding potential at 60mv and 80mv after 5min and 10 min of sts exposure . these results indicate that potassium channel , especially bk channels , and chloride channel contribute to sts - induced neuronal apoptosis and apoptotic volume decrease , which is probably one of the mechanisms underlying mediation of neuronal apoptosis by potassium channel 用斜坡电压模式记录的结果显示， 10min内正常细胞在钳制电压下电流未发生明显变化，氯通道阻断剂dids可以抑制所记录到的电流，加药10mln就使电流峰值降低到原来的36 % ，向浴槽液中加凋亡诱导剂stssmin后， + 8伽mv钳制电压下电流即增大，为加药前的131 . 3 % ，加药后10min电流进一步增大，是加药前的巧5 . 9 % ，而且电流随时间延长具有继续增大的趋势。
