See Also: Zhang Juzheng(encyclopedia)
Zhang Zai(encyclopedia)
Zhang (as used in expressions)(encyclopedia)
Zhang Daoling(encyclopedia)
Zhang Daqian(encyclopedia)
Zhang Yimou(encyclopedia)
Zhang Zhidong(encyclopedia)
Zhang Zuolin(encyclopedia)

butadiene (iou) and Zhang Juzheng (sh)


butadiene (iou)



butadiene noun. E20.
[from BUTANE + DI-2 + -ENE.]
Chemistry. A gaseous unsaturated hydrocarbon, C4H6, of which there are two isomers; esp. the isomer CH2CHCHCH2 (buta-1,3-diene), used in making synthetic rubber.

Zhang Juzheng (sh)




or Chang Chu-cheng

born 1525, Jiangling, Hubei province, China
died 1582, Beijing

Powerful Chinese minister of the Ming dynasty under the Longqing and Wanli emperors.

His benevolent rule and strong foreign and economic policies are considered to have brought the Ming dynasty to its peak. He is credited with centralizing government, limiting special privileges, and reclaiming tax-exempt land.