title: On the magnesium content in sea urchin eggs and its changes accompanying fertilization.
mesh_terms: D000818:Animals; D005260:Female; D005306:Fertilization; D008274:Magnesium / Q000032:analysis*; D010063:Ovum / Q000032:analysis*; D012617:Sea Urchins / Q000032:analysis*; D013054:Spectrophotometry, Atomic
chemical_list: D008274:Magnesium