agar to check for _______. Name This Technique. What is its purpose? What type of hemolysis is pictured below? Identify the Following I go straight from the 4x objective to the 100 x objective? Why? Identify the Following Identify the staining procedure pictured. Identify what we are doing here. What type of plate would we be making using this technique? Name the Structure Pictured. What Settings Do We Use to Sterilize Bacteria Using this Instrument? What temperature do we use to sterilize
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Introduction: The purpose of this lab is to use staining techniques and biochemical testing to identify an unknown bacteria using Bergey’s manual. Bergey’s manual of Systematic Bacteriology is a dichotomous key primarily used to identify a bacterial species. Biochemical tests are used to differentiate different species of bacteria. These tests are effective in determining the characteristics of the microbe being tested. Such characteristics include citrate utilization‚ gelatin hydrolysis‚ nitrate
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II.Results and Discussion A.Isolation of Agrobacterium tumefaciens: Six bacterial colonies were observed and screened on the selective medium. The bacterial colonies was able to characterized after 72 hours of incubation‚ bacterial colonies were visible with naked eyes on YEMA plates. The colonies appeared were medium sized bubble shaped‚ round‚ regular‚ sticky and white coloured colonies were observed. From these initial results‚ the isolated bacteria were tentatively identified as Agrobacterium
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distinguishes between Gram-positive and Gram-negative bacteria based on the composition of the cell walls. Gram-positive bacteria appear purple and Gramnegative bacteria appear pink after staining. The first Gram stain produced unsatisfactory results and was then repeated with a clear indication of negativity. Light pink staining was evident on the cells in the field of view (FOV) and a search of the slide revealed uniformity in the sample. From these results we
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Review Sheet Exercise I: Survey of Higher Microorganisms: Protozoa‚ Fungi‚ and Helminths Protozoa (group of Kingdom Protista) 1. Amoeba a. nucleus- dark center of the cell b. food vacuole- They feed by taking nutrients into the cell by diffusion and packaging it into (clear circles spread throughout the cell) c. pseudopod- “false foot”; the motility results from the streaming of the protoplasm that forms the process 2. Entamoeba causes amoebiasis or amoebic dysentery‚
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Bacterial Smears Are Fixed before Staining to? Answer It is important to heat fix the bacterial smear before staining so as to‚ kill the bacteria‚ firmly adhere the smear on to the microscopic slide to prevent washing off during staining‚ and to allow the sample to readily take up the stain. Reference: www2.hendrix.edu What is the purpose of heat- fixing the smear? It helps the cells adhere to the slide so that they can be stained. The purpose of heat fixing is to kill the organisms without
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The purpose of this lab is to isolate a bacterial population from the normal throat flora. A streak plate method will be used to obtain a pure culture of a Gram positive coccus genus of bacteria. Several biochemical tests will be performed to aid in the identification of this unknown bacterium. Biochemical tests are a series of tests used to identify certain bacterium The various tests that are used in this lab are the catalase test‚ oxidase test‚ blood hemolytic test‚ MSA‚ blood agar‚ and PEA/ab
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In March 10‚ the first procedure that was done was gram staining. The purpose of this procedure was to determine if the unknown bacterium is gram-positive or gram-negative‚ and also to determine the cell shape. Gram-positive cells will be purple while gram-negative cells will be pink. The methods for the Gram staining method first starts with a fixed smear of the bacterium‚ covered it with crystal violet for 30 seconds. Afterwards‚ it should be gently rinsed off with distilled water and be covered
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Identification of A Mixed Culture Unknown An experiment such as this one serves the purpose of allowing us‚ the students‚ to apply what we already know about any organism and any laboratory procedure to the difficult task at hand. It is possible to identify a mixed culture by running familiar experiments on the unknown bacteria and taking information already known about specific bacteria and applying it to the results. This helps to slowly eliminate any bacteria that do not correspond with the
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most circle. 5. Then take a sample out of the “unknown”; this goes in the right circle. 6. Hold your slide with the clothes pin and hold it over the flame until the water is gone and your samples are stuck to the slide. 7. Then start your gram staining process using your dyes‚ start first using the Crystal violet dye. 8. Let sit for 60 seconds‚ then rinse for 5 seconds under water. 9. Repeat step 8 for Iodine 10. Then use the acetone‚ but only use until there is no more color coming of the slide
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