improve the drinking quality of water. There are also ultraviolet systems which do a remarkable job at disinfecting water. Ultraviolet systems can destroy 99.99% of harmful microorganisms in the water very effectively and they do this by using a lamp or bulb which emits UV light which is then used as energy to attack the microorganism in the water and essentially destroy it‚
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physical methods.and in this experiment we will talk about chemical agent and its affect on bacteria which depends on the concentration ‚type and intensity of agent ‚ the length of exposure to the agent ‚ the number of microorganism present and the material bearing the microorganism . Bacterial growth can be controlled by chemical agents such as: sterilization in which we kill all living organisms. Disinfection‚ decontamination‚ disinfectant‚ antiseptic‚ sanitizer and antibiotic are another chemical
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Experiment 6: Microbial Cultivation Objectives: To successfully cultivate microorganisms from different sources to medium. Materials: Broth‚ Agar‚ Sterilized cotton swab‚ Procedure: 1) Get your broth with cotton swab inside containing your bacteria. 2) Remove the cotton and flame sterilize the mouth of the testtube. 3) Get your cotton swab inside‚ flame sterilize again the mouth of the testtube then plug it with cotton. 4) Grab the inverted plated media and flame sterilize the
Free Agar plate Petri dish Bacteria
INTRODUCTION: In this laboratory exercise explore the differences of microorganism and continue our use of specialized media and use some biochemical testing.This report discloses the basic laboratory instruments will be used in each of our practices .It is of great importance to recognize and identify the different instruments and laboratory tools‚ because in this way will we be able to use them properly and also to call them by name and know why. Listen Read phonetically Dictionary - View
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multiplication of different pathogenic microorganisms in the body-such as fungi‚ bacteria and viruses- the body’s reaction to it and the defense mechanisms it activates to counter these pathogens or the toxins they produce. Infections can range from simple to complex ones that can be fatal or debilitating‚ but because of the continuous researches and studies to protect the human race‚ antibiotics were discovered. Antibiotics inhibit the release of toxins of these microorganisms or simply fight against them
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(etiology) and manner in which disease develops (pathogenesis) - Also concerned with structural and functional changes brought about by disease and final effects on the body 2. Infection – invasion or colonization of the body by pathogenic microorganisms 3. Disease – when infection results in change in state of health Normal Microbiota – 1. Free of microbes in utero‚ at birth gain lactobacilli in intestine from mothers vaginal canal‚ E. coli taken through food and inhabits intestine
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micro-organisms where they can thrive and reproduce. For example‚ microorganisms thrive in human beings‚ animals‚ and regular objects which are used and touched such as water‚ table tops‚ doorknobs‚ and railings. The ‘portal of exit’ is a place of exit providing a way for a micro-organism to leave the reservoir. For example the micro-organism could leave the body through the nose by sneezing or as effectively by coughing through the mouth. Microorganisms carried away from the body by feces (when going to the
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Nutrient Agar which is a growth medium used to culture microorganisms or small plants and Sabourand Dextrose Agar plates used to cultivate moulds and yeasts. The objective of it was to demonstrate that microbes are everywhere. We expected to find a variety of bacteria‚ moulds and yeasts. We were introduced to aseptic techniques as they help ensure that only certain microorganisms are present in the plate. These methods also guarantee that microorganisms do not escape from the specific petri dish‚ contaminating
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with the study of all forms of life that are too small to be seen with the naked eye. Antonie’s work dealt with bacteria‚ which are tiny microorganisms that can only be seen with the help of instruments like the microscope‚ which he invented. II. John Tyndall (Aug. 2‚ 1820- Dec. 4‚ 1893) C. In 1877 Tyndall demonstrated that dust carries microorganisms. He showed that if dust was absent‚ nutrient broths remained sterile‚ even if directly exposed to air. He also provided evidence for the
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mary. Science 1972 bioremediation has become greater developed as a means of cleaning up spills of gasoline diesel ‚ heavy metals and other easily degraded petroleum products (National Research Council 1993). Bioremediation refers to the use of microorganisms to degrade contaminants that pose environmental and especially human risks. Due to its safety and convenience it has became an accepted remedy for cleaning polluted soil and water. A widely used approach to bioremediation involves stimulating
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