Lactobacillus Acidophilus Experiment Essay

The name of the lab is “Drops on a Penny.” I was expected to find the independant variable, dependant variable, write a hypothesis, and test the experiment. After testing the experiment multiple times, I needed to find the average amount of drops for each trial, graph them, and tell what kind of relationship it is. The last thing I needed to do was rewrite the details of the project and write a conclusion. The point of the experiment was to have the students get used to the idea of a lab, and get familiar with independent and dependent variables.

Identification of bacteria within Unknown Culture #21 In this experiment, an unknown culture of two different types of bacteria was assigned to each person, a number of tests were performed to isolate and identify these bacterial cells. Based on knowledge from the previous experiments completed in lab, a basic understanding of each type of bacteria was used to create a flow chart that would aid the process of identifying the unknown bacteria within the culture. A gram stain that is performed initially will narrow down the types of tests certain bacteria will and will not respond to. In addition to the gram stain, some of the tests that were used include, a catalase test, an Eosin methylene blue (EMB) agar test, a bile esculin test, and a 6.5% sodium chloride (NaCl) test.

We were asked to correctly communicate these findings as we tested each of the substances she had encountered with both water and hexane. In experiment number three, The Relationship Between the Volume of a Gas and the Temperature, we where given a list of materials and asked to come up with our own procedure, which we did using zip lock bags filled with air, and submerged fully in a measured amount of water in order to find the volume, and then the change in volume when the temperature of the water was increased. In the fourth experiment we were asked to find the temperature of heated water, based on the cold and warm water. The experiment also required that each section be preformed several times in order to ensure accuracy, and also asked that the experimental responsibilities be split up between lab partners, each doing a section of the testing. This gave us an opportunity to work together with our fellow lab partners, with no one person doing the bulk of the work.

The dependent variables in our experiment are the colors of the candies and the solvent that’s being used. In our experiment, we should be able to find out that the candy coating is actually a mixture of several pigments. Some pigments are more easily dissolved in the water and are pulled farther up the paper with the water. Certain pigments are more attracted to the paper so they will move slower up the paper. In other experiments done in the past the conclusion was only two M&M candies had two dyes involved in the candy coating.

The first hypothesis , which was that if more people will choose mint over fruit gum, was proven wrong because more people chose fruit . People picked the fruit flavored gum because of how colorful the rapper looked, the color orange is bright and attracting .The second hypothesis for the second experiment is supported by the results , mint gum’s flavor does lasted longer. Mint Gum has mint flavor from plants that helps keep the flavor longer . In the future, the experiment will be , does how many times you chew the gum play a role in the flavors lasting ?

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).

Chronic periodontitis Chronic Periodontitis is an inflammatory disease of the supporting tissues of the teeth caused by specific microorganisms or groups of specific microorganisms, leading to progressive destruction of the attachment apparatus of the teeth including periodontal ligament, cementum and alveolar bone with periodontal pocket formation, and recession of the gingival tissue(1) . The clinical feature that characterizes periodontitis from gingivitis is the presence of clinically apparent attachment loss. This loss mainly is associated with changes in the density and height of subjacent alveolar bone (1). Severe generalized periodontitis affects 5–15% of any population worldwide and is a major cause of teeth loss after dental caries (2). Chronic Periodontitis also known as adult periodontitis or chronic adult

Zimbardo should have had another colleague oversee the experiment as well, as the researcher should not have had a dual role in the experiment. Young students

If the breed of the dog is Pitbull/Boxer then the amount of bacteria will increase. My idea for the Science Fair is seeing if there is different amounts of bacteria in different breeds of dogs. This project is interesting to be because I like to work with animals and I think it would be a fun experiment. I want to see what types of dogs have the most bacteria in their mouths. In 2002 E. Jayne Gustafson did a science fair project similar to mine.

Gum in class Why are schools banning gum? “Studies showed that chewing gum increases brain activity”. “Schools Are banning gum because teachers think that chewing gum in classes is anoxmous and the gum will just be left under the table when they are done with their gum and no one wants to clean that up”. chewing gum in classes will help kids on focusing and relaxing on what they are working on. Chewing gum in class will have a positive effect not a negative effect.

A common debate of the classroom is whether students could chew gum in class. As it turns out, research shows that chewing gum has many positive effects. Students should chew gum because of all the positive benefits. Some benefits of chewing gum are calmed appetites and more concentration. Chewing gum also releases stress.

December 22, 2012 Dear Diary, I am your typical Streptococcus mutans. That name can be a little bit of a mouthful so I like to go by Carie. I am gram positive cocci and an anaerobe.

This experiment has to be carried out carefully

Joshua Miller 12/18/17 Fermentation Lab report Introduction The term fermentation refers to the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat (wikipedia). Sugars are converted to ethyl alcohol when fermentation happens. In this experiment we determined if yeast cells undergo fermentation when placed in a closed flask with no oxygen. Glucose and yeast are mixed together in a closed flask and allowed to incubate for about one hour.

Conclusion In conclusion my hypothesis was right and the wet bread grew the most (and only) mould. I can logically assume that the more moisture the bread has, the more mould it will grow. This was a fair test because each of the bread pieces had equal time to grow. The End In this experiment the conductor finds out that mould needs moisture thus needs to be included to conduct the experiment.