title: Seasonal changes in calcium, magnesium, copper and zinc content in the liver of the common frog, Rana temporaria L.
mesh_terms: D000818:Animals; D001001:Anura; D001834:Body Water / Q000378:metabolism; D002118:Calcium / Q000378:metabolism*; D003300:Copper / Q000378:metabolism*; D005260:Female; D008099:Liver / Q000378:metabolism*; D008274:Magnesium / Q000378:metabolism*; D008297:Male; D008675:Metamorphosis, Biological; D009929:Organ Size; D010053:Ovary / Q000502:physiology; D010060:Ovulation; D011896:Rana temporaria; D012621:Seasons; D012737:Sex Factors; D013997:Time Factors; D015032:Zinc / Q000378:metabolism*
chemical_list: D003300:Copper; D008274:Magnesium; D015032:Zinc; D002118:Calcium