Chicago Science Fair Final Draft
Herbal VS Chemical Ingredients in Toothpaste
Microbiology
Experimental Investigation
________________________________________
Signature of Sponsoring Teacher
________________________________________
Signature of School Science Fair Coordinator
Wentao Hao
2501 W. Addison
Lane Technical College Prep
Chicago, IL 60618
Grade 10
Table of Contents
Acknowledgements…………………………………………………………….3
Purpose…………………………………………………………………………4
Hypothesis……………………………………………………………………...4
Review of Literature……………………………………………………………5
Procedure and Materials…………………………….……………………….….10
Data……………………………………………………………………………..12
Results…………………………………………………………………………..23 Conclusion……………………………………………………………………....24 Reference List…………………………………………………………………...25
Acknowledgements I would like to thank Doctor Wu for letting me use her lab in order to conduct this experiment, and to help me with my paper. She spent her vacation time during the summer to I would also like to thank my dad, Jianjun Hao, for helping me with my Review of Literature. My appreciations also go out to Mark White, as he helped me throughout the actual experimentation in the lab. Another person I would like to thank is my mom, Lihong Lin, who helped me by getting materials to make the board and the presentation.
Purpose The purpose of this experiment is to investigate the effect of different toothpastes containing different ingredients on growth of the oral bacterium Streptococcus mutans. This is important as Streptococcus mutans is what causes the common carries infection, or a cavity.
Hypothesis
If the ring of inhibition is greatest with the Aloe vera, then the plant A. vera is the best, as a smaller zone of inhibition means that there will be a lesser growth of bacteria when that herb is used in the actual experimentation. This comes from a previous study by Julia F. Morton (1961), which says that ‘In South Africa natives split the leaves of the Aloe saponaria Haw. and lay the fleshy surface on
Microbiology
Experimental Investigation
________________________________________
Signature of Sponsoring Teacher
________________________________________
Signature of School Science Fair Coordinator
Wentao Hao
2501 W. Addison
Lane Technical College Prep
Chicago, IL 60618
Grade 10
Table of Contents
Acknowledgements…………………………………………………………….3
Purpose…………………………………………………………………………4
Hypothesis……………………………………………………………………...4
Review of Literature……………………………………………………………5
Procedure and Materials…………………………….……………………….….10
Data……………………………………………………………………………..12
Results…………………………………………………………………………..23 Conclusion……………………………………………………………………....24 Reference List…………………………………………………………………...25
Acknowledgements I would like to thank Doctor Wu for letting me use her lab in order to conduct this experiment, and to help me with my paper. She spent her vacation time during the summer to I would also like to thank my dad, Jianjun Hao, for helping me with my Review of Literature. My appreciations also go out to Mark White, as he helped me throughout the actual experimentation in the lab. Another person I would like to thank is my mom, Lihong Lin, who helped me by getting materials to make the board and the presentation.
Purpose The purpose of this experiment is to investigate the effect of different toothpastes containing different ingredients on growth of the oral bacterium Streptococcus mutans. This is important as Streptococcus mutans is what causes the common carries infection, or a cavity.
Hypothesis
If the ring of inhibition is greatest with the Aloe vera, then the plant A. vera is the best, as a smaller zone of inhibition means that there will be a lesser growth of bacteria when that herb is used in the actual experimentation. This comes from a previous study by Julia F. Morton (1961), which says that ‘In South Africa natives split the leaves of the Aloe saponaria Haw. and lay the fleshy surface on