start the activity‚ we cooked agar where we cultivated the bacteria (Staphylococcus epidermis). After plating and cooling the agar inside the petri dish‚ we foreplate the bacteria by using a cotton swab. We prepared two (2) petri dishes. One is for the bacteria and the other one is by swabbing the cotton swab to any surface and then foreplated inside the petri dish. After foreplating‚ the prepared filter paper chips are dipped into different antiseptics and disinfectants that are commercially sold. After
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towels 2 petri dishes 10 radish seeds Water Plastic container A weight A folded piece of paper Procedure 1. Take a paper towel and cut out two circles that are the same size as the base of the petri dishes. 2. Wet each paper towel circle with 5mL of water. 3. Put one wet circle into each petri dish and create raised ridges in the paper towel‚ creating a valley for each of the five seeds. 4. Put one seed in each valley. In the end‚ there should be 5 seeds in each petri dish.
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paper * pH meter * Petri dish x 3 * Measuring cylinder x 6 * Wooden stick * Distilled water * Tap water * Ruler Method 1. Test the distilled water and tap water for the pH level to see if it were neutral so it wouldn’t make a difference to the results. 2. Set up 3 petri dishes and 3 measuring cylinders 3. Measure 10mls of tap water. Add water to the petri dish and add 5cm of Sensodyne (toothpaste) into each petri dish and repeat this step 3 times
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cut using cork borer in the agar which was in the plate and removed the bored one with forceps. The incubate temperature‚ the date of the experiment and the name of students who did the experiment were wrote with a pen marker on the base of the Petri dish. Three drops of Amylase (A) and Water (W) were carefully transferred to the appropriate wells in each of the four dishes. The lids were replaced and the dishes were carefully transferred to the appropriate incubator. RESULTS Table 1: Our result
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approximately one minute. After this‚ place the circular filter paper into each petri dish adding three seeds near the top of each dish. Using one quad for each petri dish only pour a small amount into each dish. This should be enough to dampen the filter paper but not completely soak it. Next‚ you are going to want to place the lid on each petri dish and using one piece of tape‚ tape the dish to keep it shut. Then pick up each petri dish and place them into the respective quad that you poured on the seeds
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side were far less than the amount of bacteria on my constant side. In my case‚ quantitative data can be used to support it even further as it proves that the amount of bacteria on my unaltered‚ control side of the petri dish was much more than the changed‚ experimental side of the petri dish. You could also argue that qualitative data could help support it because you can visually see the difference that the Hand Sanitizer made in killing the bacteria. Unfortunately‚ since I did not do the experiment
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soil will absorb heat faster‚ therefore ending with a higher temperature than the water. Materials • 2 petri dishes • Soil • Water • 2 thermometers • Heat lamp Procedure 1. Design lab tables. 2. Record mass of petri dish and then add enough soil to fill it to the brim. Record mass again. The difference is the mass of the soil sample. 3. Record the mass of another petri dish and fill it with water. Record the mass again. The difference is the mass of the water. 4. Place the thermometers
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Petri Dish A Petri dish (or Petri plate or cell culture dish) is a shallow glass or plastic cylindrical lidded dish that biologists use to culture cells[1] or small moss plants. Empty Petri dishes may be used to observe plant germination or small animal behavior Bunsen Burner Bunsen burner‚ is a common piece of laboratory equipment that produces a single open gas flame‚ which is used for heating‚ sterilization‚ and combustion. It is used for heating‚ sterilization‚ and combustion
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alcohol and their viability was measured. The hypothesis used was if there is more ethanol alcohol‚ then the viability of the brine shrimp is unfavorable. The brine shrimp were put into sixteen Petri dishes with the same amount of brine solution. Different amounts of ethanol alcohol were added to each Petri dish. After 168 hours‚ the brine shrimp were looked at under a microscope and some cysts became nauplii and many died. In the control dishes‚ with no alcohol‚ the viability was the lowest; the average
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temperature and to make sure it is not too hot to kill the bacteria and not too cold to prevent the solution from combining. Amount of bacteria used on each agar dish. This is to make sure that no brand of detergent is either more advantaged or disadvantaged than the other in its ability to kill the bacteria. Amount of time each agar dish spent in incubation and the temperature of the incubator. To ensure the bacteria has an equal chance of growing within the same timeframe. Materials 4 beakers
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