mold

Mold bread : 

Mold bread Stefan ms s R.308

Table Of contents : 

Table Of contents Purpose Hypothesis Experiment Design Materials Procedures Results

purposes : 

purposes The purpose of my experiment was to determine how temperature would affect the growth of mold on honey potato bread.  The reason I became interested in my topic was because I thought it would be helpful to find a way to keep food from molding.  The information gathered in this experiment would help scientists who study mold and people who hate mold on their food. It will also help bread manufacturers and restaurant owners learn how to store their bread in order to keep it from molding.

Hypothesis : 

Hypothesis My hypothesis is that bread mold will grow at a slower rate when in a freezing temperature than it will at a warm temperature. I base my hypothesis on a statement found on Encarta 2000 that states “storage at a low temperature slows many of the enzymatic reactions involved in spoilage and reduces the growth rate of microorganisms.”

Experiment Design : 

Experiment Design The constants in this study were: -Type of bread and the ingredients -Date the bread was baked -Size of bread piece -Amount of light each piece gets -Size of “Zip Lock” bag -Testing procedures used -Time at which the bread was checked  The manipulated variable was the temperature at which the bread was stored while the experiment took place. The responding variable was the rate of mold growth during one week of observation I measured the amount of mold by tracing the outline of the mold onto a piece of transparent grid film covering the bread each.  Then I counted the number of square centimeters the mold covered.

materials : 

materials

procedures : 

procedures These are the procedures that I followed. 1. Bake bread, buy gloves and a dust mask, and order bread mold. 2. Incubate mold for seven days. 3. 5 labeled A, 5 labeled B, and 5 labeled C. 4. Label  A bags 1-5 label B bags 1-5 label C bags 1-5 5. Thoroughly clean working area. 6. Cut bread into 11 by 5 centimeter squares making sure that there is no crust on any part of the pieces. 7. Inoculate bread pieces with mold spores using a sterilized needle. 8. Place each piece of bread in a separate Zip-lock™ bag  9. Place bags in the controlled temperatures: Group A at ?5 degrees C.,  Group B at 5 degrees C., and  Group C at 20 degrees C. 10. Check each piece every twenty-four hours and trace mold pattern on grid film and count the number of square centimeters the mold covers. 11. Transfer data from grid film to project log.  12. Repeat steps 7 and 8 for ten days 13. Average the amount grown.

Results : 

Results The original purpose of this experiment was to determine how temperature would affect the growth of mold on honey potato bread. The results of the experiment were that the mold in the freezer did not grow at all, the mold in the refrigerator grew at an average of 0.4 and the mold in room temperature grew at an average of 23.2 after seven days of sitting

Reference : 

Reference I found my work on ask, yahoo , Google , science fair

Conclusion : 

Conclusion My hypothesis was that bread mold will grow at a slower rate when in a freezing temperature than it will at a warm temperature. The results indicate that my hypothesis should be accepted, because the mold in the freezer and refrigerator did not grow nearly as quickly as the mold in room temperature. Because of the results of this experiment, I wonder if it would have worked better if I had sprayed the bread and used a different type of mold.  If I were to conduct this project again I would make sure that all the bread was getting the same amount of light. I would use more bread, mold from more than one source. I would make sure that the temperature was kept more constant. I also thought that I should have used more temperatures that were between room temperature and refrigeration. I think this experiment would have worked better if I had moistened the bread.