The ephedrin was extracted from the upper layer of xylene extraction solution and sodium c...
下层铜代,酸化,碱化得卟啉铜钠。
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Also use of certain drugs are risk factors, like cocaine and methamphetamine because these can cause significant vasoconstriction of the placental blood vessels and an abrupt increase in blood pressure, increasing the risk of an abruption.
危险因素还有使用某些药物,如可卡因、脱氧麻,因为它们会导致胎盘血管的收缩和血压的突然升高,增加胎盘剥离的风险。