Perinatal multiple exposure to neurotoxic (lead, methylmercury, ethylmercury, and aluminum) substances and neurodevelopment at six and 24 months of age.

Perinatal multiple exposure to neurotoxic (lead, methylmercury, ethylmercury, and aluminum) substances and neurodevelopment at six and 24 months of age.

Environmental pollution (Barking, Essex : 1987) (2014-02-04)

Rejane C Marques, José V E Bernardi, José G Dórea, Maria de Fatima R Moreira, Olaf Malm

ZUSAMMENFASSUNG

We studied neurodevelopment in infants from two communities. Children living in the vicinity of tin-ore kilns and smelters - TOKS; n = 51) were compared to children from a fishing village (Itapuã; n = 45). Mean hair-Hg (HHg) concentrations were significantly higher in Itapuã children which received significantly (p = 0.0000001) less mean ethylmercury (88.6 μg) from Thimerosal-containing vaccines (TCV) than the TOKS children (120 μg). Breast-milk Pb concentrations were significantly higher in the TOKS mothers (p = 0.000017; 10.04 vs. 3.9 μg L(-1)). Bayley mental development index (MDI) and psychomotor development index (PDI) were statistically significant (respectively p < 0.0000001, p = 0.000007) lower for the TOKS children only at 24 months of age. Multivariate regression analysis showed that MDI was negatively affected by breast-milk Pb and by HHg. PDI was positively affected by breastfeeding and negatively affected by ethylmercury. Milestone achievements were negatively affected by breast-milk Pb (age of walking) and by HHg (age of talking).

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

11009

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266558

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518573

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326852

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Aluminium, foil, thickness 0.25 mm, 99.999% trace metals basis

266523

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Aluminium, ReagentPlus^®, beads, 5-15 mm, 99.9% trace metals basis

338788

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266574

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310360

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326860

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Aluminium, foil, thickness 0.13 mm, ≥99.99% trace metals basis

326887

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Aluminium, wire, diam. 0.58 mm, ≥99.99% trace metals basis

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Aluminium, foil, thickness 8 μm, 99% trace metals basis

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Aluminium, rod, 1000mm, diameter 12.7mm, 99%

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433705

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326941

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Aluminium, pellets, 3-8 mesh, ≥99.999% trace metals basis

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Aluminium, sphere, 100pcs, diameter 1.0mm, aluminum alloy 2017 precision sphere, grade 200, 95.2%

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Aluminium, foam, 150x150mm, thickness 30mm, bulk density 0.2g/cm³, porosity 0.93, aluminum 6101 grade, 98.5%

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Aluminium, tube, 200mm, outside diameter 3.0mm, inside diameter 1.62mm, wall thickness 0.69mm, hard, 99.5%

GF51598761

Aluminium, rod, 200mm, diameter 12.7mm, 99%

GF94706354

Aluminium, mesh, 150x150mm, nominal aperture 0.38mm, wire diameter 0.25mm, 40x40 wires/inch, open area 37%, plain weave mesh

GF32029444

Aluminium, rod, 100mm, diameter 12.7mm, 99%

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Aluminium, foam, 150x150mm, thickness 3.2mm, bulk density 0.2g/cm³, porosity 0.93, 16 pores/cm, aluminum 6101 grade, 98.5%

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Aluminium, mesh, 300x300mm, nominal aperture 0.38mm, wire diameter 0.25mm, 40x40 wires/inch, open area 37%, plain weave mesh

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Aluminium, honeycomb, 600x600mm, thickness 26.5mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm³, phenolic adhesive (resin), facing skin carbon fiber / epoxy, 99.9%

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Aluminium, mesh, 600x600mm, nominal aperture 0.38mm, wire diameter 0.25mm, 40x40 wires/inch, open area 37%, plain weave mesh

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