Alexander Fleming was a German botanist‚ biologist‚ and pharmacologist who discovered the first antibiotic. He did this through a rather extraordinary happenstance. While working with the properties of the bacterium staphylococcus he left on vacation. When he got back and was cleaning out his work area he noticed that a few of the slides he’d been working on had been contaminated by fungus. Upon noting that the staphylococcus colonize bordering the fungus had died he began asking more questions.
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Bacterial Unknown March 25‚ 2013 Bacterial Unknown Report Each student was given an unknown bacteria to figure out. I was given the unknown bacteria S38. Everybody is supposed to do all sorts of test to identify the bacteria. The first thing I did was smear my bacteria on a liquid medium. I then proceeded to incubate the medium for 24-48 hours. 1. GRAM STAIN The next step I took in finding my unknown bacteria was to gram stain it. This is used to differentiate the bacteria. The different
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Purpose: Unknown mixtures will be separated by means of chromatography in which the mixture will be passed in a solution through a medium leaving behind components of the mixture at different rates‚ therefore‚ different spots on the absorbing substance. This will help determine the identity of unknown mixtures. The spot colors on the strip of filter paper and the Rf values of the unknown samples will be compared to those of known samples. To find the position of the spots on the strip of paper‚ we
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Twenty- one. A guard of the Tomb of the Unknown Soldier takes twenty-one steps during his walk across. This number alludes to the twenty-one gun salute‚ the highest honor given any military of foreign dignitary. The guards hold their task in their highest regards. They look their ability to guard the Tomb of the Unknown in highest regards. Similarly‚ it would be an indescribable honor for me to be able to lay the wreath upon the Tomb. Three reasons why it would be such an honor to be able to
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on why bacterium evolves. Bacteria are single celled (eukaryotic) organisms. Bacteria is present in almost every environment‚ including the human body. They can absorb nutrients from various ways‚ some bacteria are photosynthetic meaning they absorb their nutrition from sunlight through a process known as photosynthesis‚ while other bacteria absorbs nutrients from the organism they live on or in. There is good bacteria and more dangerous “bad” bacteria. Bad bacteria can be dangerous to other species
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Identification of an Unknown Organic Acid Chem 1211K Lab Drawer #15 Wednesday November 13th‚ 2013 Unknown Number: 3334025-CF13 Table of Contents Pg. # Abstract 3 Experimental Report 4-7 Results and Discussion 7-12 Conclusion 13 **pKa Graph 14 Abstract Identifying this organic acid was an extensive task that involved several different experiments. Firstly‚ the melting
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Purpose: I will identify an unknown liquid by obtaining an average density & boiling point for my liquid and comparing them with the known densities & boiling points of liquids in the CRC handbook of Chemistry & Physics. I will perform these experiments using three different measuring tools (graduated cylinder‚ burette & pipette) to evaluate the precision of each one. Results: Density 1‚ 2 & 3 calculated by using graduated cylinder to obtain volume. Density 4‚ 5 & 6 calculated by using volumetric
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Tomb of the Unknowns The Tomb of the Unknowns in Arlington National Cemetery is a monument dedicated to American soldiers who have given their life in battle‚ only to be unidentifiable. Many people recognize the name‚ “Tomb of the Unknown Soldier”‚ but that is not the official name. It as a tool of closure for families whose loved ones paid the ultimate price for their country and whose bodies were not recovered or not recognizable. Bodies from every major conflict that America has been involved
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On November 11‚ 1921‚ the Tomb of the Unknown Soldier was established in order to remember the men and women and at least give credit to the people who fought for our country but couldn’t identify them. I should be chosen for the wreath laying at the Tomb of the Unknown Soldier because I want to show them my absolute sincerest gratitude towards them. There are no words to explain how much obligation I have for all the soldiers who have fought for my freedom. This is important to me because I would
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1. Create and complete a data table for Part One of the lab. It should include the name of the element (or unknown) examined and the color of the observed flame 2. Identify each unknown from Part One of the lab and briefly explain why you identified each unknown as you did. Part Two (Spectroscopy): 1. Create and complete a data table for Part Two of the lab. It should include the name of the element‚ the colors‚ and the wavelength values of the observed lines. 2. Describe the line spectrum
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