After experiment on microscope under oil immersion, I learned that my Unknown is gram positive. Under the lens, the bacteria appears in purple color. Its morphology is cocci arranged in cluster. However, during decolorizing process, I put too much alcohol to the crystal violet-iodine complex making the color overly removed. That led to the result of my gram positive has slightly redish
Each plate serves as a first step to identify the unknowns. The TSA (tryptic soy agar) can be used to do a gram stain, which differentiates gram-negatives from gram-positives, based on the structural make up of the cell wall (Carson, 2015). The blood agar plate is used to test for hemolytic activity, which is useful for distinguishing gram-positives. A MacConkey plate is selective by inhibiting the growth of gram-positives and differential due to the fermentation of lactose by certain gram-negative species. In the
Anti-bacterial agents kill or inhibit bacterial growth. My conductive research consisted of making agar, growing bacteria that I received from the inside of a human’s mouth and using different toothpastes to see which brands work better. Introducing bacteria
The unknown bacteria was then tested on multiple selective and differential media. Growth was present on the MacConkey Agar and the colonies were the same color as the plate, which told me my bacteria was gram negative and did not ferment lactose. There was no growth on the Mannitol Salt Agar, and this told me the unknown was not salt tolerant and did not
Examine their size, color, shape, and even smell (if possible). (Do not taste the specimens.) Then follow the instructions at each lab station for examining the specimen further. As you look at each specimen, ask yourself whether it has some or all of the characteristics of a living organism. Work with your lab group to compile a list of what you know about each specimen.
After my Bachelor of Science in Physics at Emory, I worked as a research assistant as I investigated the components of cellular function using Escherichia coli as a model organism in Dr. Minsu Kim’s research laboratory. Through manipulation at the molecular level, (i.e., altering genes, proteins, and metabolites to induce a synthetic biological system) we characterized certain functions of the cells by first understanding each individual component. To understand the relationship between each component and a certain function of the cell, we used quantitative experiments to bridge the biological processes at the molecular and cellular level using Biophysics techniques and mathematical modeling. My investigation included growing cells in minimal media with different strains of NCM 3722 E. coli, and I conducted viability assays to determine the death rate of cells after they reached stationary phase. Using minimal media, which is carbon and nitrogen free, we can manipulate the amount of carbon or nitrogen source, hence, the cell density in each culture.
They appeared to be a group of bacteria that existed in the biofilm milieu, less cognitively associated with other individual bacterial species. The orange cluster consisted of Fusobacterium species, Prevotellaspecies, Micromonasmicros, Peptostreptococcus micros, Campylobacter species, Eubacteriumspecies and Streptococcus constellatus. These species have been considered bridging species related to both, their physiological capabilities to use and release nutrient substances in the biofilms, and the recognition that they express cell surface structures and can bind to the early colonizers and to members of the red complex.
You will know when you are making good progress when there is a white frothy scummy layer on the top of the vinegar. Next, you will be able to remove the egg after a day of being soaked in the vinegar. You may want to pour the vinegar into another cup and catch the egg in your hand. Trying to dig the
When gluing your False Lashes, make sure you let the glue dry for around forty to fifty seconds before putting them slightly above your eyelash line. Setting the glue for a few seconds would make it tacky, and hence will stick better. Further, make sure you have applied more glue to the ends and inner corner so they will not easily fall off. To put on your false eyelashes start pressing it on the middle of the lash line. Then with your tweezers, pull the outer corner close to the lash line.
We got negative for indole (no production of indole, pyruvic acid and ammonia), negative for Methyl Red (our bacteria does not perform mixed-acid fermentation when supplied glucose), negative for Voges-Proskauer (no fermentation of glucose in order to produce 2,3-Butanediol-Butanediol fermentation), but positive for Citrate utilization, which means our bacteria uses citrate as a sole carbon source and energy. Something interesting here is that according to the lab textbook organism that degrade citrate must also use ammonium salts, and in the process, they produce ammonia that causes the medium to become alkaline (under this condition the medium turns to deep Prussian blue, indicating the utilization of citrate). The genus Alcaligenes is well known for being alkali-producing
Biology SBI3U-C Unit 5 Lesson 17 Key Questions: 53. Using the shark anatomy picture and the key provided, classify the 10 sharks labelled 1-10 in the diagram below. 1) Rajidae 2) Alopiidae 3)