Tobacco plants contain rich quality protein and alkaloids, and have high medicinal value.This paper reviews the application of tobacco plants in organic medicine and pesticide in recent years, and expects the application prospect of tobacco plants.

This paper introduces the structure,property,synthetic methods of ferulic acid.The biosynthetic method has broad development and application prospect. Because of its unique and excellent pharmacological activity, ferulic acid is widely applied in food, health products, cosmetic and medicine etc.

Plausible reasoning is significant to science education. Scientific philosophy, logic and historical examples prove that plausible reasoning is indispensable to scientific discoveries,so science education must pay attention to the development of plausible reasoning ability of students. Moreover, it discusses the possibility, object and content of plausible reasoning teaching in chemistry of senior middle school.