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Swimming Sting Free

CSEF · 2011 Pharmacology/ Toxicology Honorable_mention Award

Chloe F. Jot · Pacific Collegiate School, Santa Cruz, Santa Cruz County

Overview

Objectives/Goals The objective is to determine whether the presence of white vinegar or sterile human urine prevents Moon Jelly nematocysts from discharging when they come in contact with E. coli. Methods/Materials Fresh jellyfish tentacle was placed on nine slides. E. coli was added to the first three slides. E. coli and sterile urine were added to the second three slides. E. coli and white vinegar were added to the last three slides. All slides were observed under a compound microscope and the reactions between the reactants were noted. Results In general, the E. coli and jellyfish slides had a few discharged nematocysts. The E. coli, jellyfish, and urine slides had almost no discharged nematocysts. The E. coli, jellyfish, and vinegar had many discharged nematocysts. Conclusions/Discussion My conclusion is that sterile human urine is a much better barrier against jellyfish stings than white vinegar.

Summary statement

My project is about whether vinegar or human urine is a better barrier to protect human skin from being stung by jellyfish.

Help received

I received help from Mr. Rod Atchley, Mr. Darrell Steely, and Ms. Jennifer Ostrowski, all science teachers from Pacific Collegiate Charter School, UCSC librarian, Helen Belardi, UCSC Seymore Center volunteer Caitlyn O Brien, my family; Rebecca, Jean-Marc, and Zackary Jot.

Awards (1)

  • Honorable Mention

Competition history

  • CSEF 2011 Pharmacology/ Toxicology · Entry J1715

Resources

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