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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Lab: Sampling Bacteria Purpose: Refer to handout sheet. Materials: Refer to handout sheet. Procedure: Refer to handout sheet. Pre-Lab Questions: 1. Why is one dish being reserved for the class as a "control"? Having a controlled variable is important in order to be able to look at what the bacteria would look like if it hadn’t been contaminated and just left as agar. Having a sample of agar that wasnt exposed to any bacteria will provide a clear picutre of what grew on the agar
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Yannelly De Leon General Intent vs. Specific Intent “Intent: A determination to perform a particular act or to act in a particular manner for a specific reason; an aim or design; a resolution to use a certain means to reach an end.” [1] The difference between General Intent vs. Specific Intent is when the defendant commits a crime with a specific end in mind and general intent is when a defendant commits a crime with no specific result in mind. General intent crime includes but is not limited
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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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Unit 2 Assignment Critical Thinking 1. Explain why‚ even under ideal conditions‚ Streptococcus grows slowly. Cellular respiration is a process in which glucose is broken down to form an energy that can be used by the cell. There is aerobic respiration and there is anaerobic respiration. Aerobic respiration involves a series of chemical reactions in which oxygen is used to transform into carbon dioxide and H2O. This process generates energy carrying molecules called ATP. Anaerobic respiration
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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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Flesh-eating bacteria strikes in Florida On June 16th‚ 26 year-old Cason Yeager went for a swim in Florida in Hernando County and later died from contracting the flesh-eating bacteria‚ Vibrio Vulnificus. This bacteria can be found worldwide‚ most particularly in the warm coastal regions but there have been reports in other parts of the world in non-warm waters. According to the CDC in 2013‚ the case count of the vibrio vulnificus was 104 in thirteen states with six hospitalizations. No deaths‚ but
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Should Bacteria and Archaea belong to the same Kingdom? The main purpose of this essay is to find out if Archaea and Bacteria should be classified as two different Kingdoms or as a single one. As organisms‚ bacteria and archaea both are microscopic and prokaryotic (not possessing a true nucleus). These prokaryotes are very abundant on Earth and inhabit a wide spread of areas‚ including extreme ones. Both are an example of the most ancient living cells‚ which have appeared over 3.5 billion years
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Bacteria: a benefit or a hazard? Bacteria is something we are all reminded of on a daily basis by merely switching on our televisions where we are bombarded with advertisements for both ‘good’ and ‘bad’ bacteria. Contrary to the view of the past when only so-called ‘bad’ bacteria was ever talked about‚ so what has changed? This essay will address the facts about bacteria including methods used in identifying bacteria as well as looking at specific examples of how they can be both helpful and harmful
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smear. I placed a drop of water in middle of the slide‚ then put in small amount of E. coli and mixed well. The slide was allowed to air dry. When it was completely dry‚ I passed the slide over the flame for 3 times to fix the cells to the slide. For the staining part‚ I put a drop of methylene blue onto the smear for 30 second‚ rinsed with water‚ blotted dry and observed the slide using oil immersion. Gram Stain For comparison purpose‚ I used two bacteria for this experiment. They
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