The chemical measurs used for controlling our environment have increased markedly in the past few years and become now a significant factor affecting the quality of our life.Two very important areas of their application are in medicine and agriculture where excessively and indiscriminately use of drugs and pesticides has often been criticized.However,using controlled release techniques could make the application of bioactive agents safer and more efficient.This article introduces the applications of controlled release techniques in medicine and agriculture,and expounds their bright prospects.

Supercritical fluid extraction technique has recently been demonstrated to have many advantages,such as high speed,high efficiency,low pollution and what not over the traditional methods.In this paper the character of Supercritical Fluid is reviewed,the principle and equipment of Supercritical Fluid is introduced,the recent applications of Supercritical Fluid are generalized,the application of Supercritical Fluid in other fields and the research progress of it are also introduced.

Combining the macroscopic view with microscopic view is the main characteristic of chemistry study.It is a basic chemical thinking mode of studying matter and chemical changes at the microscopic level.Based on inquiring the scientific study value of the views on interaction of particles,this paper puts forward three principles of constructing it,and expounds some strategies of constructing it with abundant examples.