A closer look at some trends in youth sport participation. This is an excerpt from Social Issues in Sport, Second Edition, by Ronald B. Woods, PhD. With participation in youth sport at an all-time high, it would appear that things are rosy in the sporting world of kids. In 2000, the number of American youth who played on at least one organized sport team was found to be 54% of kids between ages 6 and 17 (American Sports Data, Inc. 2005).
The integrity of tissues is also dependent on the adhesion, by CAMs, of cells to cells and cells to the Extracellular Matrix. Extracellular matrix (ECM) All cells in solid tissue are surrounded by extracellular matrix. Both plants and animals have ECM. The cell wall of plant cells is a type of extracellular matrix.n animals, the ECM can surround cells as fibrils that contact the cells on all sides, or as a sheet called the basement membrane that cells âsit onâ. Cells in animals are also linked directly to each other by cell adhesion molecules (CAMs) at the cell surface.
In 1990 the trade associations for the corrugated industry sponsored proposals to revise Rule 41/Item 222 thus paving the way for an alternative rule for measuring box strength, ECT. ECT The Edge Crush Test (ECT) measures the ability of combined board to sustain a top-to-bottom load. The strength is directly related to the compression strength of both the liners and medium. There are two gages of strength. Box compression strength (BCT) is the maximum load a given box can stand for a moment.