Introduction
“In this experiment, the scientific method will be used to answer a specific question. After the question has been posted, the next step is to develop a scientific hypothesis (Stroud 3).” The question that this experiment address is whether or not hand sanitizer will actually kill the bacteria, Staphylococcus epidernidis. The objective was to determine if hand sanitizers inhibit the growth of S. epidermidis and to see if it is effective.
Materials & Methods “The experimental design should consist of two groups: The control group and the experimental group (Stroud 4).” The experimental group contain a disk with hand sanitizer while the control will just contain a blank disk.
To begin the experiment, students obtained a Trypticase Soy Agar (TSA) plate, and labeled the bottom of the TSA plate
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As shown in the graph below there is an overlap between the 2 error bars which mean there is no significance difference between the treatments.
Conclusion:
The objective of the experiment was to determine if hand sanitizer inhibit the growth of the bacteria and to see if it is effectively kills bacteria. Based on the experiment, it was determined that hand sanitizer does not prevent bacterial growth.
When the hypothesis test was performed, the 2 error bars do overlap, which means that the H˳ failed to reject and there is no significant difference between the 2 treatments, which means that the population of the treatments could be the same because they contain some of the range of numbers. The result only partially proved that the hypothesis fail to reject that hand sanitizers does not prevent bacterial growth. Other factors could have taken place that might have influenced the results of the experiment. “Only repeatable observations and experiments are accepted as valid contributions (Stroud
This value was 0.019589 and with this statistic we were able to look at our hypothesis again. We could successfully conclude that our null hypothesis of the urine having no effect on the mice was wrong. This is because of P-value is <0.05 and represents that are data was statistically
Introduction Our world is composed of many bacteria’s’ that can either help or destroy us. Therefore, its’s imperative to learn and study them. The purpose of the lab was to put into action the methods that have been learned in the laboratory to determine our unknown bacteria. Bacteria’s can have different features, shapes, and or arrangements that help microbiologist determined their role in our life (whether they are good or bad for humans).
After record your data and determine the absolute rate of the enzyme-catalyzed reaction. Based on the data and observations the hypothesis was accepted. It was accepted because when pH were changed to a variety of levels the transmittance began to get higher reaction rates. The increased absorbance means greater amount of product and a higher reaction rate will be produced.
This episode was about a man named Joshua who was very successful and pretty much had life figured out. He had a six-figure salary managing 14 different convenience stores. He also had a beautiful home, wife, and kids by the age of 21. But Joshua was overweight and at age 27 he decided to have gastric bypass surgery to help him with his weight loss. After the surgery, he wasn 't losing weight as quick as he wanted and he had back issues which prevented him from exercising.
I. Purpose: To experimentally determine the mass and the mole content of a measured sample. II. Materials: The materials used in this experiment a 50-mL beaker, 12 samples, a balance and paper towels. III.
The cause of this is likely that the protein was already broken down so much when used for cooking that Biuret’s test was unable to detect it. While the results from this experiment seem appropriate for the experiment, there could have been a few issues that could have taken place during the experiment. One of these could be that the solutions used for testing (such as Biuret’s solution) could have at out for too long since we did the experiment in the afternoon. This could lead to an incorrect data. Also, the materials may have not been completely clean, such as the test tubes, which could have also affected the data.
When you wash your hands how much soap do you use? If you just gave your dog a bath, or you just cleaned the bathroom. Does your instinct tell you to use more soap? Well in my science fair project I tried out if using more soap actually removes more germs/Bacteria. My hypothesis was that the amount of soap you use does not affect the amount of germs/bacteria on your hands.
Pat McGurrin October 24, 2015 Period #1 Honors Biology Mr. Dinunzio Murder and Meal Lab Analysis Procedure: 1.) Gather all materials: Safety goggles, 250ml beaker, water, hot-plate, test-tubes, paper bag tear, stomach contents, pipette, Biruet solution, Benedict’s solution, and Iodine solution. 2.) Put on safety glasses.
Therefore with regards to the experiment done, it had been proven that the hypothesis was accurate and dog saliva can kill bacteria. It is then easy to say that many myths about the healing properties of dog saliva are scientifically
Restate your predictions that were correct and give the data from your experiment that supports them. Restate your predictions that were not correct and correct them, giving the data from your experiment that supports the corrections. At the end of this experiment, it showed that I was right. Sucrase activity was at its optimal at ph6 and at 40 Celsius. The graph above shows my prediction of pH is correct but my temperature prediction is slightly off since I said it would be at 50 Celsius.
INTRODUCTION: In this experiment I was testing for antimicrobial sensitivity of Staphylococcus epidermidis by using the Kirby-Bauer Diffusion test. The three antibiotics utilized in this lab were: gentamicin, novobiocin, and penicillin. I determined the effectiveness of the antibiotic by observing and measuring the zone of inhibition for each antibiotic.
Uncontrolled Environmental conditions Atmospheric conditions The controlled variable Concentration of amylase was kept under control by measuring the amount of amylase used and also it was made sure the percentage of amylase used was 1%. The Amount of amylase/starch used were kept to 5cm3 at all times. Materials needed Beakers Bunsen burner Test tube Thermometer Stopwatch Test plate Glass rod Starch Amylase solution Water bath Iodine solution. Test tube holder Labels Marker Procedure First 5 test tubes were taken and labeled with numbers from 1 to
The first line of defense against germs is simply washing our hands. We wash our hands for many different reasons, but the main reason is to wash off all the bacteria and viruses that have ended up on our hands through the things we’ve touched. We can pick up germs from anywhere, you can pick them up from touching animals, using the restroom, touching your nose, and from even just using a keyboard that someone else has used before. Those are just some ways that you can pick up germs though our daily lives. Defensive handwashing is key to fighting germs and bacteria.
Aim To measure if bacteria on people hands after eating dinner can impact on the mood growth on
INTRODUCTION: Quick look at your hands do you see them. (attention) Do I see what you might be asking? Well the millions of bacteria that are currently hanging out on your hands.