growth in trial one or the YPD solution was contaminated in trial two. Another problem was that our spectrophotometer readings worked for trials 1 and 2‚ but failed for trial 3 because the sample dried out during incubation. Furthermore‚ spectrophotometer readings for trials four through six were successful but not statistically significant. Some possible sources of error include invalid spectrophotometer measures‚ the incorrect amount of absorbance of salt‚ dead yeast cells‚ contamination‚ plate overgrowth
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Lecture Chemistry 114 Overview: Spectroscopy will be a tool that you will use as you continue in your chemistry‚ biology and physics courses. Already‚ you have used spectroscopy in this course and CHM 113. Earlier in the term‚ we used the spectrophotometer to monitor double stranded and single stranded DNA. We have also used it to measure concentration of chemicals. This lecture will discuss spectophotometry in more detail. Background: You will recall from CHM 113 (week 4) that light is described
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solution Introduction: White light is composed of many different wavelengths of light combined together. A spectrophotometer is an instrument that shines a single wavelength of light of a known intensity into a solution and then measures the intensity of the light exiting the solution. If a solution contains any compound that absorbs light‚ the intensity of light exiting
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December 2010) Information Security Continuous Monitoring (Ongoing Monitoring in Support of Organizational Risk Management. http://csrc.nist.gov/groups/SMA/forum/documents/Forum-121410-Continuous-Monitoring-AJohnson.pdf Business Software Alliance (BSA). Information Security Governance: Toward a Framework for Action. ISACA. Defining Information Security Management Position Requirements. http://raw.rutgers.edu/docs/wcars/20wcars/ISACA/CONTECSI/Defining%20Info%20Sec%20Management.pdf
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Teaching Moral Values in Schools Introduction Pornography! Premarital sex! Lying! Cheating! Drugs! Shoplifting! Stealing! High school pregnancies! What is wrong with all these things? Based on the values that are being taught in most schools to today’s children‚ nothing. Many teachers believe that students involved in these activities are just making bad choices out of the many choices they have. How can children know that George Washington was the father of their country but cannot tell the difference
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Studying the Rate of Reaction of catechol oxidase and how it affects pH levels Introduction: In this lab‚ we studied the activity of an enzyme that is found in fruits and vegetables called catecholase or catechol oxidase. An enzyme is a protein molecule that is a catalyst. Catechol oxidase is the enzyme in fruits and vegetables that turns them that undesirable brownish color; also commonly referred to as bruising or bruised. When walking through your regular grocery store and you find yourself in
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Lab 11 Methodology By using aseptic‚ a little cultured bacteria was inoculated on the TSA agar. A quadric streak was making. Inoculation loop was heated and keep it cold for a while before the next quadratic streak. Six agar plates were observed for 24 hour at temperature of 30ºC. Choose one from the dense colony and make a sub-culture on the new agar plate. The step was repeated to get a single colony‚ which is pure colony. a) Sequestration of bacteria from fish organs Methodology
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cases of Internet fraud referred to US law enforcement in 2007 was $239 million. The rapidly evolving world of global cyber crime--and what must be done about it--is described and illustrated with charts and anecdotes in the BSA report‚ The Fight for Cyber Space. Another recent BSA report‚ Online Software Scams: A Threat to Your Security describes the links between software piracy and cyber crimes such as identity theft.”(October is National Cyber Security Month‚ 2008) The computer that James borrowed
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young men that creates character‚ teaches them in the responsibilities of citizenship‚ and gives you fitness. For over a century‚ the Boy Scouts of America has helped shape the leaders of this country by bringing together education and morals with fun. BSA believes and knows‚ through experience‚ that helping young men is the answer to making a more responsible and productive society. In 1844‚ the history began for the Scouts. The YMCA built the base for the largest organization for boys. Within the
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tube‚ and five drops of the top layer of the pigment extract from the first experiment was combined with the acetone. The test tube was inverted until thoroughly mixed. Then a test tube containing 4 mL of 80% acetone was created to blank the spectrophotometer at 380 nm. The absorbance of the tube with the extract and acetone solution was then tested for its absorbency. These tests were repeated with the same solution at 40 nm intervals‚ until the wavelength reached 740 nm‚ re-blanking the machine
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