Why is a conical flask‚ rather than a beaker‚ used in the experiment? – To allow easy mixing of solutions by swirling. 2. Why is the funnel removed from the burette after adding the acid solution? – so that the drops from the funnel will not fall into the burette. 3. In using a burette‚ why is it important to (a) rinse it with a little of the solution it is going to contain? – to remove any residual water and so avoid dilution of the acid solution when it is poured into the burette. (b) to clamp
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PHE Plate Heat Exchangers FILE NO: DATE: SUPERSEDES: DATE: 113.12L August 2010 113.12 April‚ 2009 PHE Efficient Heat Transfer in a Compact Design Armstrong’s gasketed Plate Heat Exchanger (PHE) product line includes more than 20 different models and offers numerous configurations‚ connections and material options‚ providing a superior heat transfer solution for any HVAC application. Market Challenges Rising demand for tenant space in commercial buildings and an ever-increasing focus
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II. HCV Sample Dilution and Inactivation From each sample 225 µL was transferred to a microcentrifuge tube‚ which containing 25 µL of Triton X-100 Solution; the tubes were Incubated 30 minutes at 37ºC‚ and then the samples were incubated at 56ºC for 30 min in water path (for dissotiation of HCV core antigen-antibody complex). Assay procedure 1. All reagents were leaved to reach room temperature before use‚ and then shacked thoroughly with no foam. 2. The number of strips required for the test
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When to use each test? What is the sig value? Whether or not it is significant? Read output and tell you what that value means (significant or not) One sample: given population value and compare your sample to that population Know if its significant: analyze compare means‚ one sample t-test Independent sample t-test: lab one against lab five Two independent groups (compare their means) Significance use twotail Define the correct groups: Paired sample: only care about one lab and you look at before
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Streak Plate Isolation for Obtaining Pure Cultures Data Interpretation 1- In order to unsure that you get a pure sample. 2-pure culture: laboratory culture containing a single species of organism. A pure culture is usually derived from a mixed culture (containing many species) by methods that separate the individual cells so that‚ when they multiply‚ each will form an individually distinct colony‚ which may then be used to establish new cultures with the assurance that only one type of organism
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Quantification of Microbes in Milk and Water Naomi Hall 10/20/14 BSC 381L H003 Group: Megan Baker‚ Katie Coe and Meagan Williams Abstract Coliforms are gram negative bacteria commonly found in the intestines of birds and mammals and are the most widely utilized indicators of fecal contamination. The purpose of this experiment was to test various water and milk samples for the presence of coliforms‚ specifically fecal coliforms. It was expected that fecal coliforms would be found in all water sources
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to prevent teen pregnancy. Increase linkages between teen pregnancy prevention programs and community-based clinical services. Educate stakeholders about relevant evidence-based and evidence-informed strategies to reduce teen pregnancy and data on needs and resources in target communities. To achieve these goals for FY
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Continental Drift‚ Plate Tectonics‚ The North American Plate The experts and scientists have theories on how the the world’s plates move and how earthquakes occur. These theories on how the world’s plate move is called continental drift and the theory on how earthquakes occur is called plate tectonics. They also have a lot of information on the North American Plate and in which direction it is moving and information like that. Now let me tell you more about each of these topics. Continental
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The Earth’s Plate Tectonics James Hutton was the first scientist to address the Earth was millions of years old‚ as well as alive and is continuously being formed. Charles Lyell popularized uniformitarianism‚ and believed the Earth was being shaped by slow moving forces. Alfred Wegener introduced the foundation for the theory of continental drift. Wegener was one of the first to recognize and have an understanding of how the Earth works which required data and information from earth sciences
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The Movement of Plate Tectonics Brandon Womac Plate tectonics have played a major role in the history of the Earth. All seven continents are where they are today due to the movement of plate tectonics. These seven continents were one big supercontinent called “Pangea” about 200 million years ago before breaking apart. The three different types of plate boundaries are convergent‚ divergent‚ and transform. These plate boundaries form due to the earth’s outer shell called the lithosphere having multiple
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