Illinois Junior Academy of Science - Yearbook (Urbana, IL)

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DMSO has no permanent effects on the cardiac cycle the frog. The only conclusions which can be drawn from research are those already stated in the results. tThese concenltfations administered differently might produce res ts. av., Tm' -Q I up An M 1 fl flillii' STLICRES an - - ?3fg1.-.. are .fxNEaiHEf- water: fl'iAl'...EKG.... ML-EJL- I ll DME J F , ,L.JTliJN dh 'lEI?il '1lNE. fs Zin. 'VNU-l!,'V'. lllzli 'if:'4nl1i'- P' Z in -ur i PAM McCORMlCK i Wm. F. Gurrie Central Jr. High i i , HYDRA i ANATOMY THE EFFECT OF oiii ...ao ENYIRONMENTS l I 'Vi,,, ,K HYPRA I The purpose of my project was to investigate different environmental effects on hydra. By controlling light, tem- perature, and food, I was able to observe these effects on hydra. These were determined over a period of about five months. My conclusions are as follows: Healthy, well fed hydra iwill reproduce by budding after five or six days. Excess food in a small volume will cause hydra to die. Light is a lfundamental influence in the cycle of life. It is a natural consequence that hydra will go to the light to catch food, because it is most abundant there. When you have reduced oxygen in a tank, this alone does not stimulate formation of reproductive organs. Also low temperatures alone' will not form reproductive organs. When the environment of de- creased oxygen and low temperatures are present, male and female reproductive organs are produced. Hydra will survive in an aquarium. Sick hydra have short, stubby tentacles. Tem- peratures close to freezing will kill hydra. A temperature between 550 - 66 CFJ is adequate for living conditions. TERESA PONIECKI U Ol Madonna High School Chicago, lll. Sponsor: Sister Mary Alvernia In recent years the process of protein synthesis has become of great interest to scientists. If the entire process of protein synthesis can be completely understood, than we might make protein outside the living body. The most puz- zling aspect was decoding the nucleotide sequence of the transfer RNA's which have a major part in protein synthesis. At the present alanine transfer RNA has been decoded. My project dealt with this material. I grew dry yeast in a beef broth solution and fresh yeast in a sugar solution. Then, by the process of chromato- graphy, I tried to find traces of alanine transfer R N A. My results were up to my expectations. Now there is left the problem of decoding the nucleotide sequences of other amino acid transfer R N A's. Personality Change 'From Ions eEo'ReE sTuTz lap Stanley Field Jr. High Northbrook, lil. Because of the chemical change on a living animal's body from ions, personality control through ions is possible. This is due to the intensified form of oxygen and carbon dioxide formed in the air. It is formed by the electrostatic charge escaping from the needle into the air. When the needles in the mice cages become strongly charged, the charge escapes

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Lite in lnner Space RONALD KUCHARSKI l7l GARY NEMETH St. Symphorosa School Sponsor: Mrs. Marilyn Halpin in-I The purpose of this experiment was to see if man could live and work under the sea. A hamster was put inside a fish tank and put under the water and kept there for five days. During the five days records were taken. These charts correspond with each other very well. According to the research gathered and the results of the experiment, the conclusion drawn was that man Ksimilar to a hamsterl can live under the sea for a period of time with no physical harm. A Comparison ot Taste Threshold to Sugar Between Flies and People and a Similar Comparison Between People ot Ditterent Ages and Sex DEBBIE LARSEN Jefferson Jr. High School NAIHO - . THE. J .. or IE ' f'5-'fig so s eeer A - , ihi haie ' - nrh -dis 1 5 ' ' 'Y 'eeis ff sif a M.. A 5 . .holla thc. 1 . 1 ..,.u. ad ' -are uwwllly rid vm, i as Serrsihvz - j lgo the teal: O up . .. .pr .f rr it 'ri 1 frjafg gy, , .2 .Qrii'iuu.'-iw -M 'xiii-I all Flies have very sensitive taste receptors located in the small hairs on their legs and feet. These taste receptors are very sensitive to the taste of sugar. People have taste buds located on the tip, edges, and back of the tongue: Sugar was mixed with water in a series of concentra- tions ranging from .002 Molar to 1 Molar and an attempt was made to determine the threshold or point at which the flies and people could taste the sugar. Flies are the most sensitive tasters. The majority of the flies could taste the sugar at .002 Molar. The majority of the people tested could taste the sugar at .0625 Molar which is over a hundred fold more concentrated. One person could taste the sugar at .002 Molar and one person could not taste the sugar until the 1 Molar concentration was reached. In comparing people it was seen that females had a much sharper range than males. Most of the females tasted sugar at .0625 Molar which is the average for all people. The males on the other hand had a broader range with the ma- jority falling between .0325 and .125 Molar. The young people Cage 12-131 had a very similar taste range as the older people tested C age 25-401. Flies are attracted to sugar in nature and sugar makes up a large part of their diet so their sensitive ability to taste sugar is very important to their survival. The Ettect ot Dimethyl sultoxide on the Cardiac Cycle ot the Leopard Frog lR. pipiensl MARGARET LISOWSKI my SUSAN STEPHAN my Immaculate Heart of Mary High School Sponsor: Sister Rose Anthony, I. H. M. The purpose of this project was to see the effect of various concentrations of DMSO on the cardiac cycle of the frog when injected directly into the ventricle. The frog was anesthetized and a simple ventral dissection was performed to expose the ventricle of the heart Vice. DMSO was injected directly into the ventricle. The EKG was observed continuously for one hour, the graph was recorded every five minutes or when a noticeable change occurred in the graph. I found that DMSO stabilizes, stimulates, and depresses depending on the concentrations and means of administration used. 10W-stab. 2596-stim. 5O'k-depr. 55-60fk-lethal 55f1006k-def. lethal.

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into the air, stripping electrons off atoms, and adding them on to others. This intensifies the atoms in the air. The negatively charged needle intensifies the oxygen in the air. thus making the animal active. The positively charged needle intensifies the carbon dioxide in the air, thus making the mouse sluggish. Twelve experiments were performed. Two of these were failures due to the mouse's sleeping con- dition. The following conclusions were reached: Negative ions definitely increase appetite, sleeplessness, quick response to outside stimulus, and activity. Positive ions definitely decrease appetite, sleeplessness, rapidity of response to outside stimulus, and activity. These principles can be used to promote relief from depression or hysteria in mental illness, to stimulate astro- nauts for important maneuvers, or anything else requiring increased activity or lethargy. F l Y, sX,Q,,,,.