This was done using an inoculating needle and aseptically transferring the bacteria into a slant of Simmon’s citrate agar by stabbing the needle into the butt of the agar‚ then streaking it across the top of the agar as the needle was pulled out. The tube was then placed in the 37 degrees Celsius incubator for 48 hours‚ observed for a blue color‚ then placed back in the incubator for another 5 days and observed again
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Buffers‚ and pH‚ and Diffusion oh my The pH of a solution is the measure of the concentration of charged Hydrogen ions in that given solution. A solution with a pH lower than seven is considered to be acidic. A solution with a higher pH is a base. It is very important for organisms to maintain a stable pH. Biological molecules such as proteins function only at a certain pH level and any changes in pH can result in them not functioning properly. To maintain these constant pH levels‚ buffer solutions
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Isolation and Identification of Staphylococcus aureus and epidermidis Wendy Heck Bio 175: General Microbiology Fall 2012-11-21 Staphylococcus aureus is the most pathogenic for humans and Staphylococcus epidermidis is part of the normal flora and is of low pathogenicity. Staphylococcus epidermidis and Staphylococcus aureus are two medically important species of bacteria. A culture from the nose and throat was taken to perform whether or not Staphylococcus epidermidis or Staphylococcus aureus
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ascus. The spores germinate and form hyphae (Campbell‚ 64) Species of the genus Sordaria share a number of characteristics that are advantageous for genetic studies. They all have a short life cycle‚ usually 7-12 days‚ and are easy to grow on nutrient agar in dish cultures. All kinds of mutants are easily induced and readily obtainable with particular ascospore color mutants. These visual mutants aid in tetrad analysis‚ especially in analysis of intragenic recombination. ( Campbell 72) A common
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responses in sensitised people‚ causing respiratory diseases such as hayfever and asthma (Knox‚ Ladiges‚ Evans and Saints 2006). A variety of techniques can be used to identify the diversity and density of fungi within the Sydney Basin. The use of agar plate exposure allows microbial colonies to culture within a sterile environment. These colonies can be identified using dichotomous keys (School of Biological Sciences 2010) under compound and dissecting microscopes. This type of analysis is appropriate
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others. Two examples of selective medium are Mannitol Salt agar and Phenylethyl Alcohol. 2. What is a differential medium? What makes the medium differential? Name 2 examples (3 pts.) Differential medium is distinguishing microorganisms from one another based on growth characteristics. A medium is differential when you are able to visibly see the differences in growth patterns of organisms. Differential media include blood agar and Eosin Methylene Blue. Steps Used in Identifying an Unknown
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The unknown bacteria A and bacteria B have to be identified by its genus and species. First both bacteria had to be inoculated into a TSA agar media using the streak plate method. Four quadrants were drawn‚ so that the bacteria could be isolated as much as possible. Each bacteria was inoculated into two different plates‚ so that one could be incubated at 37 degrees Celsius and the other at 25 degrees Celsius. Bacteria B‚ which was incubated at room temperature showed red colonies throughout its media
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points Describe the Kirby Bauer Test? Make sure you describe all the key elements. 1. Using sterile technique‚ inoculate 3 nutrient agar plates individually with: a. E. coli b. S. aureus c. M. smegmatis 2. Place antibiotic disks evenly spaced on the inoculated agar plates and incubate at 37C for 24-48 hours. 3. Using sterile technique‚ inoculate 3 nutrient agar plates individually with: a. E. coli b. S. aureus c. M. smegmatis 4. Using sterile technique place disk in each of the solutions:
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Medical Microbiology II - Laboratory Report 1 Aim: To successfully identify and differentiate Neisseria Species and Moraxella catarrhalis; i. detail the microscopic and cultural characteristics of the Neisseria spp. and Moraxella catarrhalis‚ ii. differentiate the Neisseria spp. and Moraxella catarrhalis associated with humans‚ iii. describe the isolation media used for Neisseria gonorrhoeae and give reasons why they are used‚ iv. recognize gram-negative diplococcic in urethral
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Microbiology and Process Analysis laboratory 25/10/2013 Group 1 Microbiology laboratory Abstract The lab exercises were divided into three different analysis; microscopy‚ soil microbiology and bacterial growth. The main aim of laboratory work with Escherichia coli and soil sample was to introduce students to bacterial growth in pure culture and soil microbial flora. The experiment of bacterial growth in pure culture using optical density
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