[Comparison of the nasal sinus development of children with or without sinusitis in Yunnan province].

Objective: To investigate the nasal sinus development and discuss the relation between sinusitis and nasal development.

Method: One thousand seven hundred and five healthy children and 1424 children with sinusitis were selected randomly. All children underwent naso sinus computer tomography.

[Research of the nasal sinusitis incidence of children in Kunming of Yunnan Province].

Objective: In order to make a basis for the treatment of nasal sinuses of children and the correlated disease, we investigate the incidence rate of nasal sinusitis of children and explore the correlation between nasal sinusitis of children and CT in Kunming.

Method: Two thousand one hundred and fourteen healthy children and 1535 children with sinusitis were selected randomly. Form whom were undergone nasal sinus computer tomography for different medical reasons.

[Study on effect of lead exposure to blood lead level and hearing in young offspring through gestation-rat].

Objective: To study the effect of lead exposure to the blood lead level and the hearing in young offspring through gestation-rat.

Method: Experiments were carried out on 42 Wistar rats, half female and half male, randomly divided into five couple groups (A, B, C, D, E). The group A, as a normal control group, was fed with a standard diet.

Lead exposure through gestation-only caused long-term learning/memory deficits in young adult offspring.

Numerous observations in clinical and preclinical studies indicate that the developing brain is particular sensitive to lead (Pb)'s pernicious effects. However, the effect of gestation-only Pb exposure on cognitive functions at maturation has not been studied. We investigated the potential effects of three levels of Pb exposure (low, middle, and high Pb: 0.