The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 132
... natural rub- ber , which contains only carbon and hydrogen . Natural rubber has a repeating unit of five carbon atoms . By starting with the unsaturated hydrocarbon isoprene ( CHS ) , a polymer can be made with the spatial arrange- ment ...
... natural rub- ber , which contains only carbon and hydrogen . Natural rubber has a repeating unit of five carbon atoms . By starting with the unsaturated hydrocarbon isoprene ( CHS ) , a polymer can be made with the spatial arrange- ment ...
Page 799
... natural levees of a complex delta contain lakes , swamps , marshes , and natural levees along abandoned river courses . The basins are wide and low in comparison with higher , narrow , natural levees along active channels , so for the ...
... natural levees of a complex delta contain lakes , swamps , marshes , and natural levees along abandoned river courses . The basins are wide and low in comparison with higher , narrow , natural levees along active channels , so for the ...
Page 1075
... natural cement deposits . In Mediterranean countries , there are many re- mains of Roman concrete construction . In more recent times , concrete with a natural cement or lime composi- tion was used notably by European engineers for the ...
... natural cement deposits . In Mediterranean countries , there are many re- mains of Roman concrete construction . In more recent times , concrete with a natural cement or lime composi- tion was used notably by European engineers for the ...
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acid activity addition administration appear atoms became become bonds called carbon cause central centre century charge Charles chemical chemistry Chess China Chinese combined common complete compounds containing continued cultural drugs early economic effect electrons elements energy established example Figure forces four give given groups hydrogen important increased industry involved ions Italy king known land later less literature living major mass materials ment metal methods molecular molecules move natural occur officials orbitals organic original party percent period play political population position possible present properties provinces reaction region remained represented result river rule separation social species structure substances successful temperature tion types United usually various