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Titolo:
The transfer of arsenic to sheep tissues
Autore:
Beresford, NA; Crout, NMJ; Mayes, RW;
Indirizzi:
Inst Terr Ecol, Merlewood Res Stn, Ctr Ecol & Hydrol, Grange Sands LA11 6JU, Cumbria, England Inst Terr Ecol Grange Sands Cumbria England LA11 6JU JU, Cumbria, England Univ Nottingham, Sch Biol Sci, Loughborough LE12 5RD, Leics, England Univ Nottingham Loughborough Leics England LE12 5RD 2 5RD, Leics, England Macaulay Land Use Res Inst, Aberdeen AB15 8QH, Scotland Macaulay Land Use Res Inst Aberdeen Scotland AB15 8QH AB15 8QH, Scotland
Titolo Testata:
JOURNAL OF AGRICULTURAL SCIENCE
, volume: 136, anno: 2001,
parte:, 3
pagine: 331 - 344
SICI:
0021-8596(200105)136:<331:TTOATS>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLASMA-MASS SPECTROMETRY; AGRICULTURAL FOOD-CHAIN; ENZYMATIC REDUCTION; BIOTRANSFER FACTORS; MAMMALIAN SYSTEMS; PATHOLOGICAL DATA; TOXIC METALS; LEAD; CADMIUM; MERCURY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Beresford, NA Inst Terr Ecol, Merlewood Res Stn, Ctr Ecol & Hydrol, GrangeSands LA11 6JU, Cumbria, England Inst Terr Ecol Grange Sands Cumbria England LA11 6JU ngland
Citazione:
N.A. Beresford et al., "The transfer of arsenic to sheep tissues", J AGR SCI, 136, 2001, pp. 331-344

Abstract

There is the potential for arsenic to enter the human food chain via ingestion by grazing animals. Data on the transfer of arsenic to ruminants have been too sparse to allow the development of dynamic models to predict changes in the arsenic contents of different tissues following ingestion. A study is described during which a group of 6-month-old lambs were given a single oral administration of (AsCl3)-As-73. Subsequently, concentrations of As-73 in the tissues of groups of lambs slaughtered at intervals over a periodof 181 days were determined. A true absorption coefficient of 0.46 +/- 0.055 (mean +/- S.E.) was determined which is considerably lower than expectedfrom previous studies of non-ruminant animals which demonstrate complete absorption for inorganic arsenic. The resultant data were used to develop a compartment model to describe arsenic behaviour in sheep tissues. The derived model accounted for 80 % (n = 100) of the observed variation in the data. The model predicts that arsenic concentrations in tissues rapidly (< 40 days) reach equilibrium with the dietary intake level. Equilibrium transfer coefficient values (the ratio of the arsenic concentration in a tissue to the daily dietary intake of arsenic) for the important food-chain tissues were calculated as: (2.5 +/- 0.67) x 10(-3) days/kg calculated as: (2.5 +/-0.67) x 10(-3) days/kg for muscle, (9.1 +/- 1.96) x 10(-3) days/kg for liver and calculated as: (2.5 +/- 0.7) x 10(-3) days/kg (1.1 +/- 0.14) x 10(-2) days/kg for kidney.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/07/20 alle ore 08:05:46