around bacteria. I was suggested to do a project where I get a petri dish containing my oral bacteria and see the effects of liquid on my oral bacteria. I was very curious about this topic and wanted to know how the bacteria grows so I gave it a shot. For my project‚ I was told to make an “if and then” hypothesis. My hypothesis was that “If I put orange juice on a petri dish containing my oral bacteria then the bacteria on the petri dish will multiply.” For this experiment‚ I gathered all the materials
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base of the dish as with the line on the lid. 32. With your sharpie still uncapped‚ label above and to the right of each well‚ 1‚ 2‚ 3‚ or 4. Do not repeat numbers on a single petri dish. Do this to each of your dishes. 33. Now‚ take one petri dish‚ placing it on your paper and let the numbers face right side up. Along the bottom of the lid‚ write ‘Gain-A’. This label will be used to remember what the dish is containing. And place that dish to the side‚ holding the petri dish properly.
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planaria were put into each petri dish‚ all petri dishes filled with spring water. These petri dishes were placed on top of a baking sheet in a dark‚ cool place. The first petri dish had cut planaria but no magnetic field. The second petri dish included bisected planaria with strength one magnets. The third petri dish had bisected planaria with strength two magnets. The fourth petri dish contained the severed planaria with strength three magnets. The fifth petri dish‚ however‚ had whole planaria
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three common bactericidal agents‚ bleach‚ hydrogen peroxide‚ and isopropyl alcohol‚ were tested. This was done by creating aqueous solutions of staphylococcus epidermidis bacteria and a chemical agent. The solutions were then incubated on an agar petri dish for 24 hours. The quantity of staphylococcus epidermidis bacteria colonies that were grown were used as an indicator of how effective each agent was in killing the bacteria. Each bactericidal agent has its own mechanism for killing bacteria. Both
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magic bullet and discovery of penicillin. this has help society to understand the causes of disease‚ and the ways to tackle it. These discoveries began in the 1800s‚ where doctors at the time were just beginning to speculate about germs and microbes with a new invention‚ the microscope. the microscope can see what is invisible to human eye and it was good use for identifying micro organism as they were incredibly small. those doctors who believed germs existed thought they were the result of
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lantern was poured into two Petri dishes in each of the four stations. One was used for the control and the other dish was used for the experiment. To each of the Petri dishes 1 mL of buffer solution was added. At station 1 the control two drops of ATP were added to each Petri dish. The control Petri dish was left alone and a pipette was used to deliver several drops of acetic acid to the experimental dish. Several drops of sodium hydroxide were added to the experimental dish. Results were observed
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containing 2 ml of sterile nutrient broth and labeled "Broth". * 2 Petri dishes containing only nutrient agar and labeled "No Amp" on the bottom with date. * 2 Petri dishes containing nutrient agar and the antibiotic ampicillin. The dishes should be labeled "Amp" on the bottom with the date. * The laboratory instructions. Methods: Pre-Lab: * PREPARATION OF THE E. COLI STARTER PLATE * One petri dish containing live DH5α E. coli. Use a sterilized transfer loop‚ a paper
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Machin‚ Bryn D.‚ 1999.Serial Dilution [online]. University of Manchester‚ School of Biological Sciences. Available from http://cal.man.ac.uk/student_projects/1999/machin/BRYNserl.HTM [Accessed 19 June 2006] 4 7. Abedon‚ Stephen T.‚ 1998.Culturing Microbes [online]. Mansfield‚ Ohio State University. Available from: http://www.mansfield.ohio-state.edu/~sabedon/biol4035.htm [Accessed 22 June 2006] 8
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soap was added. After adding the food colouring into the water‚ the food colouring slowly began moving towards the center of the Petri dish. After adding the food colouring into the milk‚ the food colouring instantly sinks towards the bottom of the Petri dish‚ and slowly disperses. After about one minute of the food colouring sitting on the bottom of the Petri dish‚ it then begins to move upwards once again and separates. After adding the food colouring into the oil‚ it stays in the same spot‚
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beakers Tap water 100 mL graduated cylinder Hot plate Two petri dishes Glass stirring rod Salt Sugar Thermometer Ice Balance Scoopula Graph Paper Procedure: Part 1(Tap Water) Measure 100 mL of tap water in a graduated cylinder and add the water to a 250 mL beaker. Use the balance to measure the mass of a Petri dish and record the mass in grams. Add salt to the petri dish until the mass is about 75 g. Record the mass to the nearest tenth
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