The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 131
... material has therefore declined . Calcium carbide , a raw material for acetylene , however , has other uses . When treated with nitrogen , it gives calcium cyanamide , valuable as a fertilizer and weed killer , and at the same time a ...
... material has therefore declined . Calcium carbide , a raw material for acetylene , however , has other uses . When treated with nitrogen , it gives calcium cyanamide , valuable as a fertilizer and weed killer , and at the same time a ...
Page 155
... material the eliminated units be situated on op- posite sides of the molecule . The olefinic product then R3 R 1 . 3 R2 - EtOH , -Cl- C = 4 R2 RA EtO- H R1 C RA R2 starting material olefin product must have the particular structure ...
... material the eliminated units be situated on op- posite sides of the molecule . The olefinic product then R3 R 1 . 3 R2 - EtOH , -Cl- C = 4 R2 RA EtO- H R1 C RA R2 starting material olefin product must have the particular structure ...
Page 419
... material force is the actualizing factor . Operating as Yin and Yang , material force provides the stuff that makes a thing concrete . Things differ because their material en- dowments are different , and yet things share the same ...
... material force is the actualizing factor . Operating as Yin and Yang , material force provides the stuff that makes a thing concrete . Things differ because their material en- dowments are different , and yet things share the same ...
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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