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2694 Journal of Student Research Abstracts · 27 THE EFFECTS OF THE GROWTH OF YEAST WITH DISSIMILAR TYPES OF WATER. Sam W. Kim. Teacher: W. P. Van Duzee. Saugus High School, 21900 Centurion Way, Saugus CA 91350. This experiment was done to find the growth of yeast with the addition of sugar and water. The experiment compared the effects of plain tap water against the effects of Brita Filtered water. First, 1 teaspoon of sugar, and 1 teaspoon of yeast were mixed into one container, and repeated in another container. Next, I separately warmed up 3 tablespoons of tap water, and 3 tablespoons of Brita Filtered water at 90 degrees Fahrenheit. Simultaneously, I added each different container of water into the mixture of yeast and sugar. I let the containers set in and grow for thirty minutes. My observation was that the tap water had a better effect on the growth of yeast rather than the filtered water. The tap water container produced foam that rose 4 inches in height during the thirty-minute period. The Brita Filtered water container produced foam that rose 3 inches in height. The same procedure was repeated 3 more times, and the results had remained the same. In conclusion, the addition of tap water with yeast and sugar exceed the growth of yeast of filtered water. 2695 THE EFFECTS OF SQUALANE (SHARK LIVER OIL) ON THE GROWTH OF FUNGUS. Douglas Meyer Jr. and Steve DeGusta (teacher). John F. Kennedy High School, 6715 Gloria Drive, Sacramento, CA, 95831. This experiment was designed to test the affects of Squalane (shark liver oil) on the growth of fungus. Squalane has been linked to slowing the growth of blood vessels that feed cancerous tumors and because of this I wanted to test it on the blood vessels of an organism. The hyphal part of the fungus's structure is similar in some ways to blood vessels and capillaries. So if Squalane slows the growth of fungus, it might suggest the hypothesis that Squalane slows the growth of blood vessels? This experiment tested two types of fungus, Trichoderma viride, and an unknown fungus. All the fungus was grown on Sabouraud Dextrose Agar. Each fungus had five control plates with just agar and 5 test plates which had a concentration of 5% Squalane in their agar. I inoculated the plates with fungus using an agar core borer. I then measured the diameter of the fungal growths and calculated the growth rates for a period of 10 days. I found that there was no significant difference in growth between the Trichoderma viride controls and the Trichoderma viride plates with 5% Squalane, because the probability that my results for the Trichoderma viride were do to chance alone was greater than .1 (p = .1) The data for the unknown fungus however shows otherwise. I found that the Squalane does significantly slow the growth of the unknown fungus, because the probability that my results for the unknown fungus were do to chance alone was between .05 and .01 (.05>p>.Ol) This evidence helps support my hypothesis and suggests that Squalane may slow the growth of blood vessels. 2696 MELATONIN AND ITS EFFECT ON REDWORM S SOIL BURROWING ABILITIES. Michael Xavier Guzman, Steven DeGusta. John F. Kennedy, 6715 Gloria Drive, Sacramento CA 95831. The purpose of this experiment was to accelerate soil aeration by testing the effects of the neurotransmitter Melatonin on the soil burrowing abilities of Eisenia foetida. This experiment was based on the premise that the benefits redworms have to offer the soil of plants would be more convenient if they occurred at a faster pace. To test soil burrowing ability the worms were divided into two groups. One group was injected with 0.01cc
28 · Journal of Student Research Abstracts "liquid melatonin" while a control was injected similarly with water. Given ten minutes to progress after injection the worm groups were timed to find how long it took them to completely burrow into the soil. The Melatonin and Control groups had burrowing means of 334 and 387 seconds respectively. Although data suggested that Melatonin increased redworm soil burrowing ability, statistics yielded that Melatonin had no significant effects on these abilities. (t=l.47, p
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2644 - CSUN ScholarWorks - California State University, Northridge

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