Titlebook: Anthropogenic Compounds; K. J. Bock,K. A. Daum,M. Zander Book 1982 Springer-Verlag Berlin Heidelberg 1982 chemistry.environment.environmen

虚度

Volatile Aromatics,ns from underground deposits. The occurrence of these products in the environment is thus mainly or exclusively of man-made origin, as distinct from other hydrocarbons such as methane, terpenoids, polycyclic aromatics.

Hiatus

Immobilize

极小量

hallow

Lead, as those for any other pollutant. Because of the ease with which lead is mined and smelted, it was one of the first metals used by early man. Lead was used for glazing pottery, and making ornaments by the Egyptians in 7,000–5,000 BC. The Romans used lead pots for cooking, lead salts for sweeteners,

IST

Arsenic, Beryllium, Selenium and Vanadium,m) have received a large share of researchers’ attention. The environmental chemistry of the transition metals, e.g., chromium, nickel, manganese, cobalt, copper, etc., has also been investigated principally because of their roles in metabolism, especially enzymatic processes. However, two non-metal

异端邪说下

生命

gimmick

Volatile Aromatics,alene, 1-methyl-naphthalene, 2-methyl-naphthalene, 2,6-dimethyl-naphthalene, and 2,6diisopropyl naphthalene are the most important volatile aromatics of commercial significance. These compounds do not occur in the environment naturally except as constituents of petroleum which may seep into the ocea

饶舌的人

Surfactants,d urine. Natural cleaning agents, such as soapwort, horse chestnut, wood ash and the like, were used until the Middle Ages. In parallel, soap developed as a very ancient chemical product, from origins which go back to the Sumerians and to Egypt. In the Euphrates and Tigris area, clay tablets have be