Science: v.1-v.219

acid actinomycin activity alanine alkali Amer analysis animals antiserum atomic basalt behavior carbon cells Chem chemical Chemistry Chihuahuan Desert chloroplast complete concentration culture differentiation effect electron energy enzyme experimental experiments field fraction galactose glycogen Guadalupe Island H-chains heat ibid Illus increase indicate injection Institute instruments iron meteorites isotopic kamacite kinin laboratory lipid Luna 9 material measurements mechanism ment metabolism meteorite method minutes molecular molecular orbital normal nuclear nucleons observed obtained oceanic orbital organisms oxygen papers particles percent plasma position present Press pressure problems Proc production protein range ratio rats reaction References and Notes renin reported response rocks sample Science scientific scientists serum species structure sucrose suggest surface synthesis Table taenite tained temperature tholeiite tion tissue tornado ture Univ University Washington York