With widely used, more and more PCBs entered environment and accumulated there. The prevention of PCBs is specially important due to its toxicity and the difficulty of degradation.

Soybean isoflavone is a substance that has important effect on human health and currently causes much attention in the fields of nutrition and medicine. It can effectively prevent many diseases such as cancer, cardiovascular disease, osteoporosis, women menopause syndrome and so on. This paper focuses on the structure, influence on human health and application of soybean isoflavone.

Chameleon paints are classified as three kinds according to their composition and properties. This paper aims to make middle school students to know about the application of chameleon paint, and to understand the color-change principle of the thermo-induced color-change materials that is the key substance of chameleon paint.

Since hyaluronic acid was first discovered and prepared in 1934, it has been widely applied based on longtime investigation and exploitation. At present, basic research has indicated that physiological functions of hyaluronic acid include the physical mechanical functionsof macro molecule network structure and viscoelasticity. Moreover, it can regularize cell by combining with receptor, and plays an important role in many physiological activities. Hyaluronic acid preparations with different use purposes have been widely used in all aspects of medicine and life.

Creating teaching resources are all factors helping the realization of teaching goal that cannot be preserved before a teaching activity but created dynamically in the teaching course. Students are the important creators of chemical teaching resources. The teacher is the developer and reproducer of chemical creating teaching resources and they should discern, develop and utilize the creating teaching resourcesin the chemical teaching course.