adj.五價的

Trivalent arsenic was more clastogenic than pentavalent arsenic. 三價砷的致染色體畸變作用大于五價砷。

Any of three anions,VO3,VO4,or V2O7,containing pentavalent vanadium. 釩酸鹽三種陰離子，VO3，VO4，或V2O7之一，含有5價的釩

Pentavalent antimonials (Sbv) meglumine antimoniate and sodium stibogluconate (SSG) have been the main first line drug for the treatment of all forms of leishmaniasis since 1940. 甲基葡胺五價銻劑和葡萄糖酸銻鈉作為治療各類利什曼病的一線藥物，至今已有60多年的歷史。

At the same time, Merck developed a pentavalent vaccine derived from five human-bovine reassortant strains that together would target the major strains of rotavirus. 此時，美國默克藥廠研發(fā)了一種五價疫苗，由人及牛的五株病毒品系組成，可對付一些主要的輪狀病毒品系。

Safety and Efficacy of a Pentavalent Human-Bovine (WC3) Reassortant Rotavirus Vaccine. T. Vesikari et al. in New England Journal of Medicine, Vol. 354, pages 23-32; January 5, 2006. 時至今日，在歷經(jīng)許多錯誤及起步失敗之后，尋求有效疫苗的競賽，終點已然在望：有好幾個輪狀病毒疫苗的安全及有效性，已經(jīng)得到證實。