the growth of most bacteria‚ but allowing salt tolerant (Halophile ) staphylo cocci to grow allows staphylococc i to grow b/c they are salt tolerant only disease causing staphylococc i ferment the sugar mannitol‚ so non disease causing staphylococc i will grow but not change the color and dieses causing staphylococc i will grow and change the color of the media alphaleteat selects for hletics@ya the hoo.com identification (bacteria‚ of gram but negative
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unknown bacteria. Bacteria have three different shapes; cocci‚ bacilli‚ and spirilla. Since bacteria pretty much have the same reflective index as water‚ a bacteria cell must be dyed so that these shapes can be seen. Materials: Petri dish Dropper Cleansing solution Slides Bibulous paper Inoculation loop Crystal violet dye‚ Iodine Acetone Safranin Water from the sink Microscope Clothes pin Bunsen burner Methods: 1. Obtain your slide and draw two circles where your bacteria will
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The Gram Negative lab had two parts; the aim of the first part is to determine the concentration of gram negative bacteria in a water sample collected from a creek near Providence Road‚ Strickling. Gram negative bacteria have a cytoplasmic membrane‚ a thin peptidoglycan layer‚ and an additional outer membrane composed of phospholipids and lipopolysaccharides. Because gram negative bacteria have a relatively thin cell wall when compared to gram positive organisms‚ they are consequently unable to retain
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Introduction: Bacteria need specific living conditions to survive. The ideal conditions for bacterial growth is a warm‚ dark‚ and damp environment. This provides the maximum effectiveness for bacterial growth. The areas in our school that contain the most bacteria would be the water fountains because the bacteria from our mouths drop off on to it when we drink from it‚ and because water fountains are not regularly washed in comparison to weight equipment. Water fountains also provide a warm damp
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respiratory paralysis‚ muscular paralysis and even death. The paralysis is due to a release of a neurotoxin by the bacteria Clostridium botulinum. C. botulinum bacteria are typically present in soil‚ but can be present due to improper storage of commercially or home prepared canned food‚ preserves‚ and fermented foods. C. botulinum is rod-shaped and gram-positive (Solomon‚ Lilly 2001). The bacteria cannot be spread from contact with infected persons‚ and rarely can cause negative affects if inhaled or injected
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substance being transmitted from one generation to another. For this experiment Griffiths used two types of pneumococcus bacteria (the bacteria that is responsible for causing pneumonia). He used the smooth strain (S) which had an outer capsule that acts as a protective shield from the host’s immune system and rough strain (R) which lacked the capsule. He then injected the S-strain bacteria into the mouse‚ as a result the mouse died due to the s-strain infecting it with pneumonia. When the r-strain was
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biofilms When bacteria is threatened by antibiotics treatment that can kill them‚ or when a strong immune system responses to bacteria and produce cytokines or other agents to eliminate it from the body‚ Bacteria has the choice of either staying as individual and die or change their form to make biofilms. Biofilms are communities or bacteria binds together in large groups and make a sticky mesh to make themselves resistant against antibiotics. Some drug that can kill single bacteria will not be able
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Unknown Lab Report Microbiology Unknown A Sonia Kabra November 26‚ 2014 Introduction There are numerous reasons for identifying unknown bacteria. Some of these organisms have distinct qualities that set them apart from one another‚ such as the exposure to certain environments. Through out the semester in the laboratory‚ we are able to encounter some of the few microorganisms that we as humans have come into contact with. With the knowledge gained from the sessions in the laboratory‚ we can now
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gram-positive bacteria. Penicillin V consists of 16 carbons‚ 18 hydrogens‚ two nitrogen‚ five oxygens and a sulfur atom. The beta-lactam group is the ring composed of two nitrogen‚ a sulfur atom‚ and an oxygen double-bound to a carbon. Penicillin works by bursting a bacteria’s cell wall; this is done by inhibiting the proteins that link peptidoglycans together in the cell wall‚ which prevents the bacteria from closing the “holes” in the wall and the difference in pressure results in the bacteria bursting
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article‚ bacteria and super bugs will also be discussed. Bacteria-Super bugs Bacteria are tiny living microorganisms - they are neither plants nor animals but belong to a group all by themselves called prokaryotes‚ which simply means they do not possess a nuclear membrane‚ nor do they have membrane-bound organelles (BioZone 2011).Bacteria are tiny single-cell microorganisms‚ usually a few micrometres in length that normally exist together in millions. It has been shown‚ that bacteria were among
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