effective in killing bacteria‚ fungus‚ and viruses. Household bleach works quickly and is widely available at a low cost. The disadvantage is could irritates mucous membranes‚ the skin‚ and the airway. It also decomposes under heat or light and reacts readily with other chemicals. Bleach solutions begin to lose its effectiveness after 2 hours. You will need to make a fresh solution for each experiment. The advantage of the 70% alcohol mixtures is capable of killing most bacteria within 5 minutes of
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The unknown bacteria A and bacteria B have to be identified by its genus and species. First both bacteria had to be inoculated into a TSA agar media using the streak plate method. Four quadrants were drawn‚ so that the bacteria could be isolated as much as possible. Each bacteria was inoculated into two different plates‚ so that one could be incubated at 37 degrees Celsius and the other at 25 degrees Celsius. Bacteria B‚ which was incubated at room temperature showed red colonies throughout its media
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Effects of Soil Erosion by Farms on the Environment and Some Solutions Traci Kramer Harrisburg Area Community College Table of Contents Abstract……………………….. Pg 3 Introduction…………………. Pg 4 Causes………………………….. Pg 4-5 Land Affects…………………. Pg 5 Water Affects………………. Pg 5-6 Chemicals…………………….. Pg 6 Lancaster County…………. Pg 6 Prevention…………………… Pg 7 Damage Control…………… Pg 7 Conclusion……………………. Pg 7-8 References…………………… Pg 9 Abstract This paper will go in depth on soil erosion caused by
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An Experiment on Soil Analysis Jacob Pitcher and Derrick Gillespie Chemistry Lab 112 Section 02 4/02/2013 Abstract A sample of soil was tested for possible contaminants and other information using a variety of techniques including moisture analysis‚ pH measurement‚ acid-base titration‚ chloride-ion electrode analysis‚ and flame testing. The sample had a greater concentration of chloride ions‚ no measurable CaCo3 ‚ and lower than standard moisture content. It was contaminated with KCl and
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Effectiveness on Gram Positive and Gram Negative Bacteria. INTRODUCTION: Bacteria are microbial organisms which are present in various environments. Many bacteria are good and help humans synthesize materials and assist in biological processes‚ such as digestion. However‚ some bacteria can cause harmful diseases. When harmful bacteria infects the body‚ people take antibiotics in order to suppress bacteria. Different antibiotics have different ways they suppress bacteria‚ and the efficacy of antibiotics depends
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Retrieved on September 8‚ 2014‚ from‚ elmhurst.com Clinical Applications 3. The bacterial enzyme streptokinase is used to digest fibrin (blood clots) in patients with atherosclerosis. Why doesn’t injection of streptokinase cause a streptococcal infection? How do we know the streptokinase will digest fibrin only and not good tissues? Streptokinase is an enzyme. Like all enzymes‚ it only acts on a specific substrate. In the case of atherosclerosis‚ the specific substrate is the fibrin. Healthy body tissue
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environments of Earth include conditions in which physical and chemical extremes make it very difficult for organisms to survive. Conditions that can destroy living cells and biomolecules include high and low temperatures; low amounts of oxygen and water; and high levels of salinity‚ acidity‚ alkalinity‚ and radiation. Examples of extreme environments on Earth are hot geysers and oceanic thermal vents‚ Antarctic sea ice‚ and oxygen-depleted rivers and lakes. Organisms that have evolved special adaptations
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Penicillin Changed the World Imagine life without antibiotics‚ people dying of a whooping cough‚ a minor wound or even a simple infection. Until the accidental discovery of penicillin by Alexander Flemming‚ life was like this. The positive effects for the discovery of penicillin were the many medical advancements made both therapeutically and medicinally. Economically‚ people were living longer lives and populations were growing more rapidly. Socially‚ people were able to interact without risking
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difference between bacteria‚ viruses‚ fungi and parasites are: Bacteria are single celled organisms that can rapidly multiple themselves every 10 minutes up to 10 times each bacterial cell‚ but they do not live or reproduce in a human cell. When threatened they will make a copy of their DNA to enable them to come back to life in the right conditions. They are able to survive in most extreme living conditions including with and without oxygen‚ there are various types of bacteria such as Cocci/Coccus
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Bacteria‚ such as Vibrio natriegens‚ are single cellular‚ microscopic microorganisms. Bacteria grow by cell division‚ mainly by a process called binary fission‚ where two cells arise from one single cell (Madigan et al.‚ 2015). In bacteria such as Vibrio natriegens‚ who are curved-rod shaped microorganisms‚ they elongate to almost twice their own size and form a dividing wall in which splits the single cell into two daughter cells (Madigan et al.‚ 2015). There are four phases to bacterial cell growth:
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