ScienceJohn Michels (Journalist) 1957 |
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Page 119
... possible to carry out a number of different tracer experiments using iso- topes at much lower enrichment levels than were formerly required . For the case of C13 enriched by a factor of 1.5 over the 1.1 percent nat- ural abundance level ...
... possible to carry out a number of different tracer experiments using iso- topes at much lower enrichment levels than were formerly required . For the case of C13 enriched by a factor of 1.5 over the 1.1 percent nat- ural abundance level ...
Page 549
... possible . Using existing techniques of potas- sium - argon age determinations combined with rubidium - strontium age measure- ments , it is possible at the present time to date the time of formation of mica in a great many igneous and ...
... possible . Using existing techniques of potas- sium - argon age determinations combined with rubidium - strontium age measure- ments , it is possible at the present time to date the time of formation of mica in a great many igneous and ...
Page 738
... possible that carbon dioxide may be as fundamental a requirement of the early embryo as oxygen " ( 39 ) . Rather than being merely a waste product of metab- olism , therefore , it appears that CO2 is capable of regulating cellular ...
... possible that carbon dioxide may be as fundamental a requirement of the early embryo as oxygen " ( 39 ) . Rather than being merely a waste product of metab- olism , therefore , it appears that CO2 is capable of regulating cellular ...
Contents
Chlorpromazine and reserpine prevention | 7 |
3262 | 9 |
3264 | 19 |
Copyright | |
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