Scanning electron microscope-based evaluation of eggshell quality.

The eggshell is the outermost covering of an egg that provides physical and chemical protection. It is a major source of calcium and minerals for the growing embryo during incubation. The egg industry suffers from a considerable economic loss due to poor eggshell quality.

Aversive exchanges with peers and adjustment during early adolescence: is disclosure helpful?

We examined the relationship between the frequency of four types of aversive exchanges with peers (teased, threatened, hit, excluded), disclosure, and psychological distress in a sample of 130 early adolescents (65 boys, 65 girls). Most (73%) reported at least one aversive exchange with a peer during the 3-month target period. Many reported that they did not talk to anyone about these exchanges.