Water quality degradation drives the release and fractionation transformation of trace metals in sediment.

The behavior and stability of trace metals in sediment are important to the ecology of rivers. Deteriorated water quality from domestic wastewater discharge has been studied extensively, but the effect of domestic wastewater on trace metals in sediment is poorly understood. To investigate this, we simulated the water quality degradation process through leaching experiments using domestic wastewater as the leaching solution.

[Effects of supplementation of different kinds of iodine on the antioxidative ability of retina in iodine deficient rats].

Objective: To study the effects of iodine supplementation (in different kinds and doses) on the antioxidative ability of retina in iodine deficient rats.

Methods: One hundred and twenty eight iodine deficient Wistar rats were randomly divided into four groups, normal dose of iodate, normal dose of iodide, high dose of iodate and high dose of iodide. Concentration of serum thyroid hormones, including total TT(3) and total TT(4), were estimated by radioimmunoassay.