AIM: To prepare recombinant ricin A-chain (RTA) protein with high biological activity.

目的：制备有高生物活性的重组蓖麻毒素a链蛋白(RTA)。

youdao

They were close to weaponizing ricin - a lethal plant toxin.

他们快把蓖麻毒素——一种致命的植物毒素——研发成武器了。

《柯林斯英汉双解大词典》

Worst of all, there is no known remedy for a ricin poisoning.

最糟糕的是，现在还没有针对这种毒素的药方。

youdao

Roger Wicker, a Mississippi Republican, received a letter containing ricin, a toxin derived from the castor oil plant.

WSJ: Best of the Web Today: Fascism by the Numbers

Three of four field tests conducted on the powder inside the envelope addressed to Wicker tested positive for a protein that later tests determined to be ricin, a lethal toxin, it says.

CNN: FBI confirms letters to Obama, others contained ricin

Thomas Pittman, a retired professor at the University of Southern Mississippi and an expert in toxicology, said ricin has a number of qualities that make it desirable to someone bent on doing harm: The ingredients are relatively easy to obtain, it's not that hard to make a crude form of it, it's deadly and it's hard to detect in a victim's body.

NPR: 'The Perfect Poison': Ricin Used In 3 Recent Cases