The results shows that, expect for the yield of pulp, juvenile wood of improved plantation have better pulping performance than ripe wood of general plantation on the tearing resistance, bursting strength, tensile strength and brightness.

Clinical analysis on colorectum cancer at different age groups;

Changing rule of corneal thickness and corneal curvature in different age groups

Objective:To study the methods for isolation and culture of rabbit articular chondrocyte and observe the morphological characteristics of rabbit chondrocyte in different ages.

Timed changes of bone histomorphometry parameters in normal rats of different months;