Dilute Lugols Experiment Results

The lab handout provided by the instructor was used as a guideline to conduct this experiment. The only difference was the organism used and data collection period. For this experiment, pill bugs and crickets were utilized. Also, data was collected for a period of 12 minutes.

The vials were placed in the water and the oxygen levels were read every 5 minutes until 30 minutes was reached. As the oxygen levels were collected they were put into a table that had all three tubes labeled at each 5-minute increment. After 30 minutes the experiment was completed and the clean up process could begin.

The topic of this lab is on biochemistry.This experiment was conducted to show how cells prevent the build of hydrogen peroxide in tissues. My group consisted of Lekha, Ruth, and Jason. There were used two different concentrations of hydrogen peroxide through this experiment , 1.5% and 3%. By testing two different types it is easier to understand how the H2O2 and catalase react with one another. To do this both the yeast, which was our catalase, and H2O2 were mixed together in a beaker. Each concentration was tested out twice for more accurate results . 1.5% concentrated H2O2 had an average reaction rate of 10.5 seconds while 3% concentrated H2O2 had an average reaction rate of 7.5 seconds. From this experiment we learned that by increasing the concentration of H2O2 and chemically combining it with a catalase it will speed up the reaction. Enzymes speed up chemical reactions . The independent variable in this experiment was the concentration of the H2O2. Some key vocabulary words are Catalase, enzyme, hydrogen peroxide ( H2O2), and concentration.

The materials used during the experiment included three plastic cups, three gummy bears, masking tape, marker, balance, calculator, tray, one plastic spoon, a measurement tray, and a ruler. The three plastic cups were used to hold the tap water, salt water, and sugar water. The masking tape and marker were used to label each cup with the

The chicken bones that were placed in the container containing water with a pH of 7 were the experimental control because a pH of 7 is considered neutral. Yet it was made sure all other variables, that could be, were controlled such as ensuring consistency in the containers, the origin of the water, temperature, environmental factors throughout all groups. This

For this experiment, my group had several leaves of spinach and hole punched 40 disks out of the spinach leaf. In order to avoid any bias results, we made sure to avoid hole punching any veins in the spinach. After that we filled 4 cups each with 100 milliliters of carbon water. Each cup would have a different amount of salinity, the first cup would be the control group which would have no salt in it. The second cup would have ¼ of a teaspoon of salt in it, the third cup would have ½ of a teaspoon of salt in it, and the fourth cup would have ¾ of a teaspoon of salt in it.

cesses; glial cells; and an investment of sheath cells. Sheath cells are absent in Octopus

Each experiment had a control, independent, and dependent variable. The first experiment’s control variable is the size of the filter paper dipped in the potato mixture, and the amount of hydrogen peroxide used. The independent variable is the temperature of the hydrogen peroxide. The dependent variable of this first experiment is the reaction time of the filter paper’s movement in the test tube due to the release of oxygen bubbles from the Catalase breaking down the hydrogen peroxide. The second experiment’s control variable is the size of the filter paper dipped in the potato mixture.

Four beakers filled with 2 degrees celsius, 23 degrees Celsius, 40 degrees Celsius, and 80 degrees Celsius water to place the test tubes in during the experiment. Also on the bench were 1 mL pipettes, Kimwhipes, phosphate buffer, and Parafilm. The test tubes were labeled 1-6. Kimwhipes were used to keep fingerprints off the test tubes. Each test tube contained 1mL of buffer, 1mL of DPIP, 3 mL of water, and 3 drops of chloroplasts. The first test tube that labeled was used as the calibration tube. The second test tube that was labeled was used as for 23 degrees Celsius water, the third tube that was labeled was the 2 degrees Celsius tube, the fourth tube that was labeled was for the 40 degrees Celsius water, and the fifth tube that was labeled for the 80 degrees Celsius water and finally the sixth test tube that was labeled for the control. The control test tube was not placed in

Since the liquid will expand the size of the sponge, then the surface area of the sponges were not able to be kept as a control since the increase of surface area of the sponge can increase the likelihood of it being chosen. The measurements of the sponges were also taken right after the liquids were added; thus the liquid was not actually fully absorbed by the sponge yet making the measurements not accurate and as the trails went by the sponges expanded more than the recorded measurements causing a change in surface area. The same Armadillidium vulgares were used for the trials, which can cause them to be overexposed or less active as the trials went by, making their activeness not a control in the experiment. To improve the design, the measurements of the sponges after the liquid is added should be measured after a few minutes to ensure that the sponge has fully absorbed all the liquid and that it has reached its maximum

Lumo labs conducted an experiment which investigated the effect of Lumosity training on normal healthy adults. 23 participants were distributed into two groups, one received the Lumosity training and the other didn’t. The duration of the brain training 20 minutes of Lumosity per day, once a day, for five

Materials: two pitchers, a bucket to pour out waste liquids, lemon concentrate, baking soda , 3 containers, rulers, sharpie markers, pH papers (litmus paper), paper towels, and a journal to record the data. Procedures: (1) Gather materials (three containers, rulers,

Additionally, we examined how the potato reacts when we have a different concentration solution. Depend on this experiment our data determines that, if the amount of salt solution increases the osmosis movement in the potato will decrease, or the potatoes will loss weight which the result supports our hypothesis, but if the amount of the salt solution decreases the osmosis in the potato piece will increase or the potato will gain water. Our data and report showed that the hypothesis was right, and the result is as we expected, but if we added some independent variable for example if we change the salt solution to different solution we should see more result than we saw in this experiment. The result we get on this experiment supports our hypothesis because we find the reliable result as we learned in this class. However there are several factors that can cause our result, one of the factors that can cause our result could be when we measure our potato before and after can cause the result. Another factor that affect our result cloud be the salt solution concentration measurement may not be accurate that can affect our result as well as the first reason. For future improvement, we need to make sure that the size and the weight of the potatoes are equal, and the solution is accurate, and measuring the potato correctly before and after we soaked in the solution. If I

The experiment was conducted in two different days. The materials that are needed for the experiment were dissecting light microscope, water, salt, 4 small beakers, clear mounting tape, petri dishes, Brine Shrimp eggs, fine tip paint brush, tape and marker. On day one, our group labeled the beakers to 0%, 0.5%, 1% and 1.5% first. We measured out 30ml of water to place into small beaker then weight salt solution to 0g, 0.15g, 0.3g and 0.45g to put in the beakers and mixed, respectively. Then, we placed one small square of mounting tape in each petri dish that was marked with different salinity percentages. We put a small amount of eggs on to mounting tape in each petri dish. After that, we counted the number of eggs using dissection microscope,

Hypothesis: The further the away the light meter the lower the intensity will be. I think this because it common sense as if you are moving the more further away from a street light the less amount of the light you can see .So this means that the further away the light meter from the light bulb of course the intensity will be lower .