Causes of variation of copper, iron, manganese, zinc and magnesium levels in bovine livers

dc.contributor.authorEhret, W.J.
dc.contributor.authorSandrock, K.C.W.
dc.contributor.authorBoyazoglu, P.A.
dc.date.accessioned2020-10-28T12:46:23Z
dc.date.available2020-10-28T12:46:23Z
dc.date.issued1975-09
dc.descriptionBased upon a dissertation submitted by W.J. Ehret to the University of Pretoria in partial fulfilment of the requirements for the degree M. Med. Vet. (Zootech.)en_ZA
dc.description.abstractThe effects of locality on the copper, iron, manganese, zinc and magnesium levels in 407 bovine caudate lobe liver samples preserved in formalin for differing storage periods were examined. The mineral determinations, expressed on the wet basis (WB), were made by atomic absorption spectrophotometry after wet ashing of the liver. Two hundred and ten of the liver samples were from cattle from one farm (Farm 1) the remaining 197 cattle being from another farm (Farm 2). The copper, iron and magnesium levels were taken as indicative of the hepatic concentrations at slaughter. Locality had a significant effect (P< 0,05) on the copper, iron and magnesium levels. All copper levels on Farm 1 fell well below the accepted minimum (33,0 mg/kg). The deficiency appeared to be secondary with the possible implication of sewage ef11uent. In terms of biological variation the different iron levels appeared of minor importance and no inverse relationship was found between iron and copper. The manganese and zinc levels were interpreted with caution due to the significant differences reported in their hepatic concentrations after six months of storage in formalin. Extremely high zinc levels in individual animals could have been associated with sewage effluent.en_ZA
dc.description.departmentProduction Animal Studiesen_ZA
dc.description.librarianam2020en_ZA
dc.description.urihttp://www.jsava.co.zaen_ZA
dc.identifier.citationEhret, W.J., Sandrock, K.C.W. & Boyazoglu, P.A. 1975, 'Causes of variation of copper, iron, manganese, zinc and magnesium levels in bovine livers', Journal of the South African Veterinary Association, vol. 46, no. 3, pp. 249-255.en_ZA
dc.identifier.issn1019-9128 (print)
dc.identifier.issn2224-9435 (online)
dc.identifier.urihttp://hdl.handle.net/2263/76641
dc.language.isoenen_ZA
dc.publisherAOSIS OpenJournalsen_ZA
dc.rights© 1975. The Authors. Licensee: AOSIS OpenJournals. This article is licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) license.en_ZA
dc.subjectLiveren_ZA
dc.subjectCattleen_ZA
dc.subjectFarmen_ZA
dc.subjectSewage effluenten_ZA
dc.titleCauses of variation of copper, iron, manganese, zinc and magnesium levels in bovine liversen_ZA
dc.typeArticleen_ZA

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