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Qinhuangdao

(Encyclopedia)Qinhuangdao or Chinwangtao both: chĭnˈhwängˈdouˈ [key], city (1994 est. pop. 412,500), NE Hebei prov., China, on the Bohai, an arm of the Yellow Sea. It is an ice-free port that exports large qua...

Qitai

(Encyclopedia)Qitai kēˈtīˈ [key], town and oasis, N Xinjiang Uygur Autonomous Region, China, in the Dzungarian basin. It is a road hub and a trading center (furs, skins, raisins, and tea). Gold mines are nearby...

Lao Tzu

(Encyclopedia)Lao Tzu lou dzə [key], fl. 6th cent. b.c., Chinese philosopher, reputedly the founder of Taoism. It is uncertain that Lao Tzu [Ch.,=old person or old philosopher] is historical. His biography in Ssu-...

lead acetate

(Encyclopedia)lead acetate, chemical compound, a white crystalline substance with a sweetish taste. Like other lead compounds, it is very poisonous. Lead acetate is soluble in water and glycerin. With water it form...

aryl group

(Encyclopedia)aryl group ârˈĭl [key], in chemistry, group of atoms derived from benzene or from a benzene derivative by removing one hydrogen that is bonded to the benzene ring (see radical). The simplest aryl g...

Chula Vista

(Encyclopedia)Chula Vista cho͞oˈlə [key], city (2020 pop. 275,487), San Diego co., S Calif., on San Diego ...

Tacheng

(Encyclopedia)Tacheng cho͞ogo͞ochäkˈ [key], town (1994 est. pop. 56,400), N Xinjiang Uygur Autonomous Region, China, in the Dzungarian basin, bordering on Kazakhstan. Long a major center for trade with Central ...

Baliqiao

(Encyclopedia)Baliqiao päˈlēˈkouˈ [key], village, Hebei prov., China, near Beijing. There, in 1860, a British and French force that had recently occupied Tianjin defeated a Chinese army and invaded Beijing. Ch...

polymer

(Encyclopedia)CE5 A. Addition polymerization: Two ethylene molecules, C2H4, combine to form two links in the polyethylene chain molecule (C2H4)n. B. Condensation polymerization: Two glycine molecules, NH2CH2COOH...

Chuquicamata

(Encyclopedia)Chuquicamata cho͞oˌkēkämäˈtä [key], former town, Antofagasta region, N Chile, on the western slopes of the Andes. At an elevation of 10,435 ft (3,181 m), the location is the site of the world's...