Gram Staining of Bacteria Since bacteria is really small microbiologist use stains to help them see bacteria more clearly under the microscope. Many of the stains they use color the bacteria cells directly and are called direct stains. Bacteria cells have a slightly negative charge while direct stains have a slightly positive charge that helps the stain bin to the bacteria. The strength of the binding from the stains depends on the make-up of the cell wall itself. Gram staining is the most helpful
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2014 MCB 3020L- Section 018 Unknown #16 Abstract This report contains the background information on gram positive and gram negative bacteria‚ which will aid in understanding the use of specific laboratory experiments to distinguish between the two types of bacteria. Included are the materials and methods used to identify the gram positive and gram negative bacteria and methods which also differentiate between microbes of each group. The implications of the methods of identification used are also
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Introduction: Bacteria are microscopic‚ single-celled organisms. Their genetic information is encoded in one large chromosome. It can also be found in plasmids which are small circular pieces of DNA that contain important genetic information for the growth of bacteria. In nature‚ this information is often a gene that encodes a protein that will make the bacteria resistant to an antibiotic. The reason for this protein being made within the bacteria is because of how bacteria usually grow in the same
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sodium benzoate · aroma · sodium saccharin · cetylpyridinium chloride · menthol · sodium flouride (0.05%) In this investigation we aim to test the antibacterial properties of this mouthwash treating it like a disinfectant against three common bacteria which can be safely used in the laboratory: Escherichia coli‚ Baccilus Megatherium‚ and Staphlococcus Albus. Disinfection is a procedure which destroys‚ inactivates or removes potentially harmful microbes- without necessarily affecting other organisms
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They are also called bacteria group ● They have cell wall that are made of peptidoglycan ● They have varied shapes ● Basic Shapes of Bacteria ● 1.) Cocci ● They are differently arranged ● They can form pairs (diplococcus)‚ chains (streptococcus)‚ or clusters (staphylococcus) ● They are spherical in shape 2.) Bacilli ● They can also occur in chains (streptobacillus) ● They are spherical in shape 3.) Spirilla ● They are spiral in shape Bioremediation ● “Oil-eating bacteria” ● Scientists at
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“spreading” the bacteria on a nutrient growth media in a specific manner as demonstrated in the lab tonight. In this lab we will be learning two methods to accomplish this task‚ the quadrant streak and the T streak. 1. Quadrant streak 2. T streak [pic] Lab exercise: Following the demonstration of both of these isolation techniques‚ it is your job to see how well you can repeat the procedure‚ and get isolated colonies of bacteria. A colony of bacteria is nothing more
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on objects whose importance we can see. For this reason bacteria seem insignificant on the surface‚ its invisibility marking its lack of precedence as a threat. This is a misconception‚ because bacteria hold enormous power. It can heal and build‚ but also cripple and kill. It can produce sustainable fuel‚ and repair cracked concrete‚ but it can also destroy our bodies with infections and disease. In the past‚ we have been subject to bacteria‚ claiming lives long before we understood how it worked
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Gram negative bacteria resistant patterns are troublesome to the general public because common illnesses could suddenly become deadly. Carbapenem antibiotics are seen as a last resort. If gram-negative bacteria develop a resistance to this antibiotic‚ antibiotics could become useless in treating a super resistant strain of gram-negative bacteria. NMD-1 is one of the most resistant genes found in gram negative bacteria. If this genes is readily passed between different types of bacteria‚ widespread
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Olivia Teasdale Mrs. Gaspar SBI3U1 10/07/13 The Effect of Disinfectants and Antiseptics on Bacteria Growth Abstract The purpose of this lab was to determine the effect of disinfectants and antiseptics on bacterial growth. By observing the effects of 5 different inhibitors including alcohol‚ bleach‚ soap solution and distilled water‚ it was determined what antiseptic or disinfectant was able to best inhibit this kind of bacterial growth. Nutrient Agar was poured into a Petri dish with four quadrants
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