Calcium alginate gel beads were widely used as drug carriers, which were obtained by the gelation of sodium alginate with divalent cation as Ca2 +.

目前，海藻酸钠与二价钙离子交联反应形成的海藻酸钙凝胶小球作为药物的载体日益受到广泛的应用。

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The systems include pectin beads crosslinked with zinc or any divalent cation of interest, which beads are then coated with Eudragit TM -type polymers.

所述系统包括与锌或任何目的二价阳离子交联的果胶珠粒，所述珠粒然后用型聚合物包被。

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This divalent cation is released from presynaptic vesicles into the synaptic cleft upon neuronal activity and acts as a modulator of many ligand-gated ion channels.

锌离子随着神经元的活动从突触前膜的囊泡中释放到突触间隙，对突触内受体进行调控。

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