|Medium |Generation Time (minutes) | |Escherichia coli |Glucose-salts |17 | |Bacillus megaterium |Sucrose-salts |25 | |Streptococcus lactis |Milk |26
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Genetically-modified foods (GM foods) have made a big splash in the news lately. Euro- pean environmental organizations and public interest groups have been actively protest- ing against GM foods for months‚ and recent controversial studies about the effects of genetically-modified corn pollen on monarch butterfly caterpillars1‚2 have brought the issue of genetic engineering to the forefront of the public consciousness in the U.S. In response to the up swelling of public concern‚ the U.S. Food and
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Case Study: Tuberculosis 1) What is Tuberculosis? Tuberculosis (TB) is a contagious bacterial infection caused by Mycobacterium tuberculosis. It mainly affects the respiratory system by mainly damaging and destroying lung tissue but can affect other parts of the body. It also suppresses the immune system making the body less able to fight any disease. 90% of people who are infected develop latent TB‚ which is were the bacteria are present in the body but are not active. This means the people
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Bacteria shooting toxins that attack the lining of the intestines‚ causing a condition called Clostridium difficile colitis. Taxonomy Phylum Firmicutes‚ Class Clostridia‚ Order Clostridiales. Family Clostridiaceae‚ Genus Clostridium. Historical synonym: Bacillus difficile. Morphology Gram-positive‚ straight rods‚ motility is variable‚ have a flagella. Spores are oval‚ sub terminal swelling the cell. Cultural characteristics Colonies on blood agar plates are circular‚ flat or low convex‚ opaque‚
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Unicellular/colony-forming/filamentous Formation of spores/Division by transverse binary fission Importance as human pathogens or not 5.) Name the domains of life. Archaea Bacteria Eukarya 6.) Name and describe 3 basic forms of prokaryotes. Bacillus (rod-shaped) Coccus (spherical/ovoid-shaped) Spirillum (long and helical-shaped) 7.) The bacterial cell wall is the single most important contributor to cell shape. 8.) Prokaryotic cell walls are constructed of many layers‚ which is formed from
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purpose of the immunity enhancement based on a strain of lactic acid bacteria. My latest project is the fermentation of tyrothricin (a kind of antibiotics) and I am writing an English paper entitled "Optimization of the production of tyrothricin by Bacillus brevis with response surface methodology". Thus‚ my scientific thinking has been solidly and strictly trained in independent research‚ meanwhile‚ my innovative spirits greatly improved. Additionally‚ I received two professional training last year
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soil microorganisms‚ particularly B. methylotrophicus-SCS2012 exhibited strong antibacterial activity against Streptococcus agalactae‚ Bacillus cereus‚ Escherichia coli‚ Shigella sonnei and Shigella dysenteriae with the zone of inhibition range 28.33 to 32.16 mm at 100μg/disc. Minimum inhibitory concentration (MIC) of the extract against Streptococcus agalactae‚ Bacillus cereus‚ Escherichia coli‚ Shigella sonnei and Shigella dysenteriae was found to be 156‚ 156‚ 312‚ 312 and 625μg/ml respectively.
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pathogenesis of enteric clostridial infection requires two factors; the presence of these microorganisms in the intestine and a change in the enteric microenvironment. C. perfringens is a Gram-positive‚ spore-forming‚ obligately anaerobic‚ non-motile bacillus and capable of toxin production. Materials and methods Case history: A male Maltese dog‚ weighing 2.04 kg‚ was died on the way to the animal hospital with clinical signs of weakness‚ large volume of bloody diarrhea but no vomit. The previous day
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Chapter 1 Cell Theory- in the 18th century‚ two scientists came up with the cell theory. Schleiden and Schwen. 3 corollaries of the cell theory: -all cells are alike in chemical composition -all cells store and process information in the same way -all cells arise from other cell through cell division 5 types of different Microscopes 1. Light Microscope- produces 2-D image Direct descendants of Hooks scope> take two lenses to a light source> used this to magnify images up to 1‚000 fold.
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MICROBES AND FOOD – A ‘RELATIONSHIP’ Microbes and food have always had a love-hate relationship. Food producers have learned to harness their power -- and sometimes for good use. There is no doubt that organically grown fruits and vegetables are superior in flavor. Now‚ despite arguments to the contrary made by food manufacturers‚ they may well be more nutritious for a variety of reasons. There are always studies available to prove any point‚ especially one
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