Bacteria Lab Write-Up Jianna Liu P8 Purpose: The purpose of this lab is to find out which substance‚ alcohol‚ antibacterial soap‚ water‚ or hydrogen peroxide‚ is the best at preventing the growth of bacteria. Hypothesis: Antibacterial soap will be the best because soap is a substance that people use to wash their hands because it takes away the germs. Even the name‚ antibacterial soap‚ suggests that it fights off bacteria. Hydrogen peroxide is second because it is used
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Introduction The purpose of this experiment is to see how much bacteria can and will grow in common places in a typical high school. Common places can mean many things‚ including anything from water fountain spouts to computer keyboards. Such objects can hold up to 2‚700‚000 colony forming units per square inch (or CFU/in sq)(NSF). A colony forming unit is the unit used to find an estimate of the number of cells of a bacteria. This unit of measurement is commonly utilized in the subject of microbiology
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A bacterium of choice by Frederick Griffith was S. pneumoniae cells also known as Pneumococcus bacteria. This is due to the growth of bacteria inside the body of a host regardless in the form of either solid or liquid cultures. In 1928‚ Frederick Griffith studied and published his findings on the different strains of Pneumococcus bacteria. There were 2 in particular that looked different; S and R. The R colonies has rough surface whereas the S colonies have smooth surface. Intrigued by the experiment
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EFFECTS OF SOIL EROSION IN THE PHILIPPINES Soil erosion is happening everywhere in this world. Especially near the water area and maybe it is happening below where we stand. One my grandparents told me‚ that one time when they were young a typhoon with its devastating rain hit manila. Because they were near river‚ because of the heavy rain without warning the soil beneath their home collapse and their home was wash away in the river. And it said to be the cause of the collapse of the soil was the
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| |Factors affecting the growth of bacteria | Introduction: Bacteria make up a large domain of prokaryotic microorganisms. And how can be bacteria destroyed? Antibiotics are widely used in the prevention and treatment of infectious diseases. Antibiotic is a substance‚ such as penicillin or streptomycin
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science project to be researched and experimented is whether bacteria can become resistant to antibacterial soaps. Bacteria will be grown in an agar broth containing .01%‚ .1%‚ .5% and 10% antibacterial soap. To fully understand the subject‚ information on everything necessary to conduct this experiment and comprehend the results was researched. Once the experiment is completed a conclusion will be able to be made as to whether or not bacteria can become resistant to antibacterial soaps The procedure
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Introduction There are both virulent and non-virulent bacteria and fungi that grow on plants. It is difficult to distinguish between the two without proper inspection and diagnosis of the diseased plant to know whether the bacteria or the fungus in question is the virulent or non-virulent one. Therefore pure cultures need to be isolated to know with absolute certainty which is the causative bacteria or fungus. Potato dextrose agar is a good nutrient agar for mycelia to thrive on which is present
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this experiment which are the brand of dishwashing detergent; Palmolive‚ Morning Fresh and Ultra Coles Brand and the type of bacteria used which are; Micrococcus Luteus and an unknown bacteria from a sponge. Dependent Variable The dependent variable is the factor that is being tested which is the size of the zone of inhibition from the detergent solution and the bacteria. It will be measured in millimetres using a ruler. Constant Variables Constant Variables are set in place in order to produce
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of purified water again. Due to the people of the United States drinking billions of gallons of water daily‚ the amount of purified water we drink is starting to run out which is causing a problem already. Psychological studies have shown humans still don’t accept water being reused even after knowing the water is purified and perfectly clean. Advocates are still against ultraviolet machines being used to clean and purify water. While some people believe that drinking recycled water is both repulsive
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(D30)2 / [D10 x D60] = 0.1252 / [0.55 x 0.078] = 0.36422 < 1 Cu = D60 / D10 = 0.55 / 0.078 =7.0513 > 6 If a soil is well-graded‚ it should satisfy 1 < Cc < 3 Cu > 4 (for gravels) Cu > 6 (for sand) Note that‚ from our result‚ Cc is much smaller than one. So by the constraints 1 < Cc < 3‚ we can conclude that the testing soil is not well-graded‚ but poorly graded. And the Cu obtained is 7.0513 > 6‚ which implies that the sample should be sand but not
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